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April 2o, 194s.
J. A.‘E1_DR1'DGE
5 Sheets-Sheet 1
Filed sept. s, 1945
Apnl 20, 1948.
Filed Sept. 9, 1943
5 Sheets-Sheet 2
April 20, 1948.
Filed Sept. 9, 1943
5 Sheets-Sheet 3
Àpnl 20, 1948.
J, A. ELlgaRlßç-¿Ejv
Filed Sept. 9, 1945
5 Sheets-Sheet 4
J. A. Eldrídj'e..
nv ms Arrónnzvs
@m6, I
April 20, 1948.
Filed Sept; 9, 1945
5 Sheets-Sheet 5
J. A, Eldrídße'.
Patented Apr. 20,1948
' `
James A. Eldridge, st. James, Manitoba, canada `
Application September 9, 1943, Serial No. 501,734
11 Claims. (Cl. 24J-32)
This application constitutes a continuation
in-part of my application Serial No. 327,508, filed
VFigure 1 is a side elevation of my feed crusher
showing certain parts in section and with certain
on the 2nd day of April, 1940, and relates to im~ I
other parts broken away.
provements in feed Crushers, an object of my
invention being to provide a device of the char
Figure 2 is» a longitudinal fragmentary repre
sentation, predominantly inïcross-section, and
illustrating my coaxial, shaft-mounted structure.
acter herewithin described, which has been de
Figure 3 is a front elevation showing the ex
signed to meet the many requirements of vari
ternal appearance of my feed crusher from this
ous classes of user, and is of simplified, rugged
and economical construction, having certain
Figure 4 is a perspective illustration of 'my
unique inventive features hereinafter to be de 10
valve cut-‘off and crushing plate release mech
A further object of my invention is to pro
vide a device of the character herewithin de
‘ Figure 5 is a perspective detail illustrating my
crushing plate spacing and setting dial lock.
scribed in which the rotating and endwise mov
able parts, are mounted coaxially with respect to 15 Figure 6 is a detail in elevation showing the
means by which Ilmay `vary micrometrically the
a non-rotatable supporting shaft, a rotatable
opening of my gate valve.
crushing plate and screw conveyor being included
Figure '1 `is a detail in front elevation illus
among the parts mounted upon said shaft, and
trating a modification of the arrangement of
being adjustably end-shiftable with the shaft to.
vary the space between the said rotating crush» 20' Figure 6.
Figure 8 is a side elevation showin-g means by
ing plate, and an opposed stationary crushing
which my valve cut-off and crushing plate re
lease mechanism may be automatically actuated
A further object of _my invention is to provide,
when foreign matter enters between the crush
in a crushing machine, simplified means for pro
viding an adjustable, but normally rigid and un 25 ing plates.
Figure 9 is a side elevation of my feed crusher
yielding spacial relationship between the two
showing an alternative means by which my valve
crushing plates so that the coarseness or fineness
cut-off and crushing plate release mechanism
of grind in a given batch may be perfectly uni
be automatically actuated when foreign
form for that batch.
A further object of my invention is to provide 30 matter enters between the crushing plates.
Figure 10 is a perspective detail illustrating a
in a device of the character herewithin described
part of the mechanism employed in -connection
a unique manually operable and simultaneously
with Figure 9.
acting combination valve cut-oli and crushing
Figure 11 is a detail in elevation illustrating
plate release mechanism.
A further object of my invention is to provide 35 the means by which my discharge outlet may be
automatically closed and reset by the operation
a device of the character herewithin described
of my valve cut-off and crushing plate release
which embodies a valve cut-off and crushing
plate release mechanism automatically operated
Figure 12 is a detail illustrating the use of a
or collar in place of a »spring between> my
crushing plates together with the provision of
by the entrance of an obstruction between the
setting dial and barrel cam.
a further automatically operated gate valve in
Figure 13 is a detail illustrating the useof av
the outlet leading from the crushing chamber.
transverse pin in place of a spring between my
A still further object of my invention is to
setting dial and barrel cam.
provide a device of the character herewithin de
Figure 14 is an 'elevation of the structure of
scribed which includes means for varying the 45
quantity of material precipitated into the base
of my hopper and conveyed therefrom into the
crushing chamber.
Figure 6 at right angles thereto.
In the drawings like characters of reference
indicate corresponding parts in Vthe different
With the above more important objects in
view and such other minor objects as may appear 50 My feed crusher comprises the usual hopper
A, conveyor screw B, crushing chamber C, crush
as the speciñcation proceeds, my invention con
ing plates D and E, and driving pulley F, all suit
sists essentially in the arrangement and con
ably mounted upon a supporting structure G;
struction of parts all as hereinafter more par
ì Brieñy stated, the pulley F rotates about the
ticularly described, reference being had to th
55 stationary but end-shiftable supporting shaft l,
accompanying drawings, in which-
the rotating crushing plate D being secured for
rotation with the pulley via a crushing plate
holder, in horizontal alignment with the sta
tionary crushing plate E, while the Iconveyor
Extending substantially parallel to the upper
portion of the lever 9', is the hopper valve lever
I2, upon which are a series of projections con
stituting a ratcheted rack capable of being en
gaged by a projection in the form of a pawl I3
upon the lever â’. The lever I2 is angulated and
suitably secured at its lower end to the hopper
valve 4 already referred to land obviously upon
kicking the 'lever 9’ out of its catch or recess I0,
10 the same will rotate to the right under the swiv
e‘ll'ing action of the cam 8, the pawl I3 will leave
'screw B is bolted to the said plate holder as
illustrated most clearly in the accompanying
Figure 2, to rotate with the pulley and
the plate D.`
Means are provided' in my invention for posi-4
tively adjusting the space between the plates D
and E and for rigidly and unyieldingly main’
taining the space desired, excepting only when ’
a hard and damaging obstacle -cbmes between.
them, such means consisting of a setting dial 2,
the :associated rack whereupon the lever I2 will
move' lupwardly under the influence of the spring
I4, therebycl‘os'ing‘ the valve 4.
which rotates the screw-threaded stem 3 »co 15
Having now described my invention in its es
axially positioned within the internally threaded
sentials, I‘will proceed to describe the same in de
forward end of the supporting' Shaft I.
Means are also provided for manuallyand
My supporting structure G comprises a bed
simultaneously effecting the closing of a hopper
plate'Iü, to one end of which is bolted an up
valve 4 adjacentl the base _of ,my hopperrA and 20 standing leg It upon the apex o-f which is my
permitting the 'separationjof the plates D and E
to their maziixnum extent <inf‘the¿ever'it’of «adam
aging Vobstruction finding ,its way 'between the
crushing4 plates D Aand E, this mechanisnrîbeing
clearly illustrated in vthe accompanying Figures
1 and ,4,1 from which it will bei, seen that upon
the front wall'S >of the' baise casting G'of my Áhop
main bearing Il, in» which the supporting shaft
I is mounted. Upon the' `forward endof the bed
pla-t'e is an upstanding wall I8 provided with
an enlarged aperture ‘I9’ through which the con
25 veyor screw'B and the shaft l extend, the'hous
ing I9 which ltogether with the wall I8 forms my
crushing chambergC, being suitably secured at
per is a stationary Vcyl'lindrical cam thrust re
the rear side of the wall I8, .while lon vthe for
ceiving elementi] provided with Aan external
ward» side thereof is `positioned the -basecasting
spiral >canjrtrack: Enga'geable with this >rhein 30 6 already referred to, the hopper A, being suit
ber is a’swivellin'g barrelcainrß, held against >the
ably positioned upon the apex of the base cast~
track of the ca_m 1 by means _of the spring- 59
which spring; itshculdv beparticularly noted is
of `considerable stiifness >such as will vnot »yield yto
mere increases vin >the volume of material `tend
At this Apoint I would mention that I may if
desired, providera trap 29 below the base cast
' ingí the saine being detachable and suitably
ing to enter between the plates,v for which‘rea»
son it will _clearly bev recognized ¿that >when the
plates are set a given `distance apart, no 'varia
tion vin the volume of rïìaterialentering between
clipped thereto as most clearly illustrated’in the
accompanying Figures '1 and?, in which case no
`base -will be provided tothe base-casting 16, the
purposelo'f this trap being >to permit-surplus ma
terialor foreign )matter to Aaccumulate therein,
from vwhich »it may periodically be conveniently
them is possible, and consequently a uniform »
„In this 'content- I j_would therefore eàgpl'ain jthat
I should also mention at this »point that an
outlet -2»I positioned at the angle illustrated in
the resistanceof the spring >9 shouldbe so ad
justed for operation of the Crusher with-engines
the accompanying Figure 3, is formed integral
with the housing «I9 of my crushing chamber, to
of yvarious H.
ratings'isuc'àh> that itwill yield
only lunder Astresses `-irnposed by _ 4pressure above
that-which _the material tobejgroun?l exerts -at
which if desired, a conduit may be attached,
through which material crushed 4is blown under
the influence of the fan bladeswhich are at
adjusting the distance betweeñit and thecam
described in detail.
a given H, ^P. rating. For example 'by rotating
handwheel -2 lto left orjrig’ht ‘on stem 3 and so 50 tached to therotating crushing plate'later to be
8 I -may Vset thelspring 9 at Ya resistanne of about
500 lbs. when used with an engine of Afrom 35
to 4Q H. >P. and atl this setting, such rnere in
creases of Ipressurebetween the 'plates as ?night
be efiectedby Inasrses‘of wetgrain, or different
or'hardcr grain, will not-be suiñcientto separate
the plates.
The foregoing >constitutes a significant differ
ence over conventional crushers,"` wherein vone
plate is positioned in yielding relationship to the
The supporting shaft I »is mounted inthe ele
ment 1, which as hasbeen previously mentioned,
is set within the front wall 5 of the base cast
ing 6, this member being clearly illustrated lin
crosses'ection in the accompanying-Figure 2, from
which it will be seen that my shaft is prevented
` from rotation by the provision of -the key 22 but
is free -to slide-endw-ise under the conditions to
be hereinafter described. From the accompany
ing Figure l, it will be seen that the'eïxt'e'rnal
other,the pressure at w ch excessivejyiel'ding
surface of the element ï, Vtakes the form of a
takes piace, being experimentally determined by
frusto-corïiic'al «wall 23, around which is formed
the `user after he has "started theimachine 5in-op’~
a spiralgcam track V2li.
eration and Icommenced»to 'grind'. I_f for instance 65 yIt ywill lbe seen that the forward end -o'f ‘my
he ñnds that the material ¿being discharged is
supporting shaft I -li'e's -in the aperture 25 which
too coarse, he exerts‘more'pressure -'on-the spring
which in turn increases pressure ono-ne of the
plates. Obviously under such conditions, when
the character of thew'fnater'i'al changes, as Ífrom
wet todry> or vice versa, Athe quality ofthe’grind
Secured `tothe lbarrel'car?i and extending up
wardly thereffrcrnfis a
lever 9" normallyheld
in a recess ‘I-Il, in'a'shaped casting -‘I I.
extends throughthe casting 'I and that 'the> same
is internally drilled and tapped fa »short 'distance
to receive the externally threaded end ofthe
stem j3 already'referredto. A >collar »26- integral
with the stern S ¿is normally held against the
shoulder 2T. Keyways Y28'a'nd ¿29 in the shaft I
and the, `element ¿'I respectively, receive? the key
22A and prevent vrotation of the «shaft while pere
mitting longitudinal movement thereof.
ÍThe stem 3 extends forwardly and terminates
in- the crushing plate spacing and setting dial
2 already referred to, the setting dial being
' screwed the desired distance for anyparticular
spring setting as already described, onto the pro
jecting end of thenstem/3 and prevented from
independent movement by means of the split
pin 30 which extends transversely through the
boss of the dial and the stem'. In this way the
distance between handwheel 2 and collar 26 is
rigidly fixed after which rotation of the hand
wheel will necessarily involve rotation o-f stem
3 in a iixed plane thus acting to end-shift shaft I.
A sleeve 3I internally screw-threaded if desired
accompanying Figure 1, wherein i have desig
nated the two visible peaks Y and Z, peak X being
out of sight at'the rear so that this member may
be considered as a modification of the well-known
crown ratchet except that it is not in this in
stance, employed in association with a complete
ratcheting motion or with any associated pawl,
but on the contrary, is designed to swivel back and
forth against the cam track 24 of which naturally there will bea corresponding number of
corresponding gradients, but it will not override
the track 24 as a crown ratchet would in its con~
ventional operation.
Secured to an outstanding projection 49 upon
may be placed upon the stem 3 to the rear of 15 the wall of the cam 8, is the angulated and up
wardly extending cam lever 9' already referred to,
the same extending through the catch IIJ of the
casting or plate II, which is of the configuration
clearly illustrated in the accompanying Figure 4.
Figures 1 and 12 it will be seen that the inner ball 20 .To the right hand side of the catch I0 is a lead-in
the dial 2 solely for centering the spring 9.
My pulley F which is journalled upon the sup
porting shaft‘I, runs on ball-bearing assemblies
32 and 33 and by reference to the accompanying
races of these assemblies are held against a tend
track 50 (which may also function as a cam track
as described hereinafter) to facilitate the manual
operation of moving the lever into the catch, this
shaft I, by means of the diametrically split thrust
lever being preferably formed of spring steel for
bearing rings 34 which set inside into annular
recesses 35 in the shaft provided for that purpose. 25 this purpose.
To the left of and slightly below the catch or
The bearing rings 34 are held within the recesses
recess I0, is a rectangular slot 5I through which
35 by means of the said inner ball races which
ency to move to right or left along the supporting
it will be clearly seen extend around and act as
my valve lever I2 extends, the same being angu
lated to the configuration clearly illustrated in
collars for the recessed parts of the rings 34, while
the upstanding portions thereof act as annular 30 the accompanying Figures 1 and 4, and from these
ñgúres also it will be noted that a ratcheted rack
buttresses to prevent left or right hand endwise
52 is positioned along one side of this lever with
movement. The assembly 32 is suitably housed
the ratchet teeth projecting slightly and capable
about by a casing 36 which is secured to the pulley
of being engaged by the pawl I3 upon thev cam
F while assembly 33 is 'enclosed by housing I9.
In order to provide satisfactory lubrication for 35 lever 9’. The spring I4 already referred to, is se
cured at its upper end preferably by means of
the assemblies 32 and 33, I have provided three
the bolts which hold the casting II in position
outwardly projecting intercepters or lpaddles 3l,
while the lower end is suitably secured to the valve
the same being secured to the shaft I, from which
lever at a point below the rack 52 and during the
it will be apparent that when a quantity of oil is
admitted to the hollow center or bath 38 within 40 operation of the machine or at timesV when the
the pulley through the oil hole 39, the rotation of
ratchets are engaged by the pawl, this spring will
the pulley will cause a swirling action in the oil
be in tension.
A link 53 is freely secured at the end of the
angulated portion 54 of the valve lever, this vlink
thereby providing particularly satisfactory lubri 45 extending through an aperture at the top left
hand corner of the side wall 55 of the base casting
6, and thereacross. To this member is secured a
Attached to the forward end of the pulley F is
gate valve 56 designed to move under the influ
my rotatable crushing plate holder 40, which will
ence of the link 53 and the associated lever
not be described in detail except in respect to one
unique feature as a crushing plate holder neces 50 through an are to admit or cut-off the iiow of
material to be crushed -between the conical por
sarily forms an integral part of all crushing ma
tion ofthe hopper A and the base casting 6, in
chines. This feature resides in the provision of
which the conveyor is located.
slots 42, by means of which the fan blades 43
In operation, it will be perceived that the rotat-`
are adjustably held Within the crushing chamber
C so that the effective width thereof may be varied 55 ing and stationary plates D and E having -beeni>
set or spaced the desired distance apart in thet ‘
to Áproduce an adjustable air blast and it will be
manner to be presently described, it is ,possible in:V
obvious from the illustration of this detail in the
an emergency to bring about separation of the ro
accompanying Figure 1 that these fan blades are
tating plate from the stationary plate to a pre
secured to the holder 40 by means of stud-bolts
and nuts, adjustment being made after the re 60 determined maximum distance and simultane
ously to close the gate valve 55 in the event of a,
moval of the housing I9. ,
damaging obstruction finding its way between the
My conveyor screw B is provided with the flange
crushing plates D and E. This is accomplished
44 at the rear end thereof through which bolts
by the operator kicking or .throwing the cam lever
45 extend and whereby the conveyor screw is se
cured to the boss 46 of the crushing plate holder 65 9’ upwardly so that it disengages the catch IB'.
whereupon it will swing to the right together with
40, so that the two will rotate as a unit, the sleeve
the swivelling cam 8 and as it swings of course,
41 of the conveyor screw being spaced from the
the cam willtravel to the left with respect to the
shaft to avoid friction as clearly illustrated in
accompanying Figure 1, against the cam track 24.
Figure 2.
The entire supporting shaft and the continu
The swivelling cam 8 which is designed to move 70
ation thereof in the form of the screw-threaded
in a spiral direction against the thrust element l,
stem 3, is now free to move to the left together
is of the barrel type and I may provide thereupon
with the conveyor screw B, the driving pulley F
either one'continuous circumscribing spiral cam
and of course, the attached crushing plate holder
track 48 or alternatively two or three such tracks `
body, which coming in contact with the intercep
ters will cause considerable agitation and splash,
as >in the preferred embodiment illustrated in the 75 and rotating crushing plate D. The crusher can
collar 66, and atthe extreme lower end thereof
with a retaining nut 66' through which a split
lock pin extends, so that the shaft 6I is free to
rotate in the lug 64 without moving endwise
sider myself bound by the abovestated pitch
angle, since it is to be noted that with a lesser
pitch angle my lever 9' >could still be manually
thrown to the right after release from catch I0,
and in the latter case by its inherent resiliency
and tendency to spring in the direction indicated
by arrow 68 (Figure 1) after being forced out of
»the said catch, and which resiliency would cause
Upon the cam lever 9' is an offset block 61, the
lower surface of which is designed to engage with
the perimeter of the sieeve 65 and from the fore
it to press against and so ride clockwise (when
going arrangement it will be apparent that when
my valve cut-ofi' and crushing plate release 10 viewed from the right hand end of the crusher)
against the curved lip 50 (Figure 4), especially if
mechanism is in the “set” position, rotation of the
made somewhat steeper ’than shown and lubri
thumb screw 62 will have the effect of shifting the '
valve lever I2 endwise upwardly or downwardly,
In the accompanying Figure 8, I have provided
thereby varying to any exact extent desired, the
gate 56 and consequently, the aperture leading 15 means whereby my valve cut-off and crushing
plate release mechanism may be caused to operate
from the hopper to the crushing chamber.
automatically upon the accident-al introduction
In the foregoing arrangement as illustrated in
of a Vhard piece of foreign matter between the
Figure 6, it Will be apparent that in the resetting
crushing plates, the same comprisingv an offset
operation, it is necessary ñrst to depress the valve
arm 69, which may be positioned at any conven
lever I2 so that the sleeve 65 is below the level
ient point upon the coll-ar 3| either directly or
of the block 61 before throwing the cam lever 9'
freely upon a ring as illustrated, a horizontal
to the left and into its retaining catch and before
push-rod 'I0 being secured in this member for
releasing the said valve lever but obviously by the
end-shiftable movement in the direction of the
provision of a block Ii'i' having the bevelled sur
face illustrated in Figure 7, it is possible to throw 25 arrow to operate a small pivoted plate 'I0' of the
configuration clearly illustrated, this plate being
over the cam lever 9' into its catch before depress
designed to move in the arc shown by the adjacent
ing `the valve lever I2 since the sleeve may now
arrow about the stud ÍII which is secured in an
ride downwardly against 61' without interception
outwardly projecting plate 'I2 secured to the wall
thereby, space being provided in this instance
for the necessary sideways movement of the valve só 5 and it> will be understood that the rear end of
.the rod 'I0 pushes against the vertical face of the
lever, although a moment’s consideration of Fig
plate 'I0' to actuate the same in the direction
ure 7 will reveal that iiexure either of shaft 9'
or I2 or both would allow sleeve B5 to ride down
wardly upon application of a downward effort
on the upper end of shaft I2, Via the bevelled
surface of block E'I' and engage with the under
edge thereof even if no allowance for sideways
-of the adjacent arrow.
When so actuated, the link I3 will travel down
wardly as it is to be understood that the lower
end of this Vmember is secured tothe plate 1D’
at the point illustrated, »there being a substan
tially similar plate 14 at the upper end ofthe
movement were permitted by slot 5I.
link 'I3 and pivotally mounted in or beneath the
From all the foregoing, it will be recognized
that I have produced a crusher wherein separating 40 casting Il and just in front of the catch Iii in
which the cam lever> 9' resides in the "set” po
movement of the rotating plate from the station
sition. vIf desired, the auxiliary trigger ‘I4’ may
ary plate may be effected, to all intents and pur
be added as this is a somewhat more convenient
poses instantaneously and with-out any muscular
means for operating the whole associated mechan'
effort whatever worth speaking of such as would
be necessary for instance in throwing a lever to 45 ismA than the cam lever 9’.
` It is to be understood that the plate 14 is de
separate a plate against resistance of a spring.
signed to travelin the direction of the adjacent
The “snap action” employed for the separation
of my crusher is a much more pleasing and
mechanically satisfactory action than is the action
of manually pulling, pushing -or rotating a lever
or wheel for instance, through a given distance
and which takes appreciable time to accomplishv
in any event. Under such conditions as the exist- .
ence of a damaging obstruction between a pair
arrow when the link 13 is drawn downwardly
and when this occurs, the corner ‘I5 of the plate
IIIv bears against `the lever 9' to disengage the
same from its catch, whereupon it swings to the
right in the manner already described in detail,
to release the adjacent valve lever I2 and throw
the rotatable crushing plate away from the sta
of crushing plates, the operator naturally desires 55 tionary crushing plate by the full predetermined
above all things to be able to act expeditiously
and feel that he is doing so, and this is possible in
a most gratifying way in the case of the present
invention, the plates of which a child can operate
distance and it is to be understood that the fore
going movement takes place when a hard piece
of foreign matter enters between Athe grinding
surfaces of the crushing plates, thereby forcing
every bit as satisfactorily as an adult immediately 60 them apart to a slight extent, which forcing ac
tion is felt bythe stem 3 and naturally the as
the harsh noise of a damaging obstruction be
socìated collar 3|, and hence the offset arm 69
tween the plates is heard. In such case it will be
all of which move to the left with respect to the
recognized that the lever 9' can equally well be
accompanying Figure 8.
kicked out of the catch with the knee or the foot
F’inallyinV connection with this detail, I would
if forl instance when the operator’s hands are full. 65
explain that the push rod 10 is freely held medi
To conclude this description of the main struc
ture, I desire to explain that the pitch angle of
either the 'spiral surfaces 24 or 48 or preferably
both, should be greater than the angle of static
ally of' its length by means of the tie block 15’
which is provided >with a horizontal aperture
therefor anda square vertical aperture for the
friction which supervenes at the minimum I-I. P.
likely to be employed. `With an engine of 35-40
cam lever 9', the arrangement being that the
rod is free to end-shift through its aperture in the
I-I. P. the minimum pitch angle should be approxi
mately 14° from the plane of rotation when made
tie block but is swung around with the cam lever
taking the arm E8 with it when the release mecha
nism illustrated in the accompanying Figure 5
out of cast iron. In this context however I wish
it to be particularly understood that I do not con 75 is tripped as explained. Following the leftward
“kick” .by rod 70 whichactuates plate .10’ .as
aforesaid, `the resulting .rotationof> lever .9’ .car
riesparts @9, to »1.0Land15’ Iaround ,with it,_sc.,.that
therod .'lil. becomes .. disengaged 4from _,p1ateJil",
which vlatter >rotates in „a iixed `vertical''plantas
already explained, heine secured .to ,the .hopper
YIn .the -accomnanyinefhiguresi9 and „10.1. have
illustrated an alternative meanswherebymy .hop
pervalve cut-off and crusl‘iing.plate-releasezrnech1
mentioned, .shall >be .prevented from ...being con
veyed-by .the fanning vaction ywithin 4the chamber
upwardly into the ground. mass.
From the. accompanying-Figure l1 therefore it
will be seen that I provide a gate valve 76 which
Yis k_hinged .atthe .location illustrated and is de
_Signed to .cover the `passageway through which
thevgroundmaterial travels, this Valve being pro
vided .at thepoint at .which it is hinged with
an .elongated rod .-11, angulated downwards at
aniemmay be caused to operateautomatically
the yend -18 „and it is .to beunderstoodthat the
upon = the. accidental ir,rtrodimtiornv of.>a„hard .piece
downwardangulation is inthe .vertical plane of
of foreign matter between the crushing plates,
theoutstanding,projection dä to .which thecam
the same lbeine; in v.certain .respectspreferable -to
lever 9’ .isasecurei -so that the rod .'l‘! .actually
the embodiment ofiFigureB, 'as more. positive, .has 1.5 is .QLsubStantiaIlengthas it. has to extend from
heater . appearance »and .less liable v.todamage `in
the outlet .21, .which-is. in the plane of the crush
the .wear'and `tear-of the :heavy use to which
ing-.chamber -.| .thev member .49,.for which rea
machines of this charactenareplaced,
son «an .intermediate 4supporting bracket ï9 is
This embodiment ,calls `for `the `.use of :afblock
provided, .these-me heingmountedupon the side
82 extending .from vwhich is -aftrigger'similar to
wallßû. ofthefhopper base.
the trigger 14’ and to ywhich accordinglylhave
Toïprovide for actuation oí the rod 'Ví-and the
assigned this numeralvin the accompanying »Fig
gate valve 7.6, .lprovidelatripßi which extends
ures .9 and 1.0, :thehlock~ itself, however.. being
outwardly fromV theV root ofv the cam lever il', the
of _somewhat altered form .«as«-.comparedr-With. the
same-.being »provided with Íadorned end which
block 14. and tunctioningas .alevernf theflrst 25 engages with the :down-turned .portion i8 and
class to actuateuthe cam-leverïßf.
fromthis arrangement, .it is obvious that lwhen
It. `will .be seen »that the. »block «.82 .is _fpivotally
the `cam ylever «9' `.travels in the »direction ofthe
mounted as. at 83 »in »thee casting ...andgis .provided
with an upwardly 4projecting .abutmentçß'l »while
freely Iattached .zto the ilowercorner »85.* is a :rod .8S`
adjacent arrow `>as l.already .described in detail,
the `trip 8| 4will rise yand obviously, .will .permit
theA gate `valve .16 .to drop.
Obviously, thegate `valve .1.6. lwill not ldrop to
theclosed-v position instantaneouslyin .view of thev
which is pivoted in the bearing'platesfßßïproject
blastîotair impingingthereagainst, .Itwill drop,
ìnsupwardly from the main bearing J1.
howevehfto,anextentsuñicient todeiiect the re
The nose .89 of .the .plate ..81 terminates ~in .a .35. maining partially crushed .contents ofthe crush
extending ldiagonally fthrough l.the 'hopper >»and
terminating in y'the bellaerank-action Plate l81,
screwdhreadedcollar .9.0, through »Whichextends
aset screw 9|, ,theend of .which 'bears against
the shaft I and .from the :foregoing-.description
it .willbe . apparent that. uponfforeible separation
ing .chamber outwardly and downwardly through
the .aperture 82 -so `that -the »same willnot mix
with‘the thoroughly .grou-nd massand it -will be
understood of course, that .I use >the íword “re
of-.the crushing-platesdue tofadamagìng> obstruc 40 maining.”.,advisedly because in the meantime the
tion, thc~shaft I. willmove tothetleft with xre
spect to the accompanying. Figure @dior-reasons
already .adequately `described and. `i, ...50.
will. cause-.the plate .8.1 lto .rotate fabout yits .pivot
point in a clockwise directioneslirldicatedby the
arrow S2', thus shifting lthe. hodßlìlnthe >direc
tionof .the arrow .9.3, .which in «.turn wilhrotate
the block 8-2 about. the l«pivot :point ßßcounter
clockwise» in the.dî_reci‘.ion.«.olv the..».ar'1`,0W .94
valve .5.6 has closed .fasalrefady .described-so .that
there is . only .atlimited . quantity. of . material . to .be
discharged .from the . crushing chamber.
.Einally it-.shouldbenotedthatastop 83 which
/ may .be in l.the Vformel? _a .transverse projecting
strip,..eXtends..facross .the ñoor of the .outlet 2l
against .whiohwdoor 1G .isf-intendedto rest atan
incline ..when~close'd, thisstop yalso Vassisting to
preventv4 the-.rettilinei small amounts of material
This vaction - obviously .will compelthe labutment' 5,9 dischargedfaf-tcr thc- crushing A.plateshave .been
a4 to. forceïthe `carri.lever »9' out» of .its recess. 10,.
whereupon-.the same ,willswlng ,with .the barrel
cam ßinthe `manner alreadyadeduately described
and oi oourse,¿ atthesarne `t1_r_ne,>_.thevalvelever
Since.. manymodiñcations can vbe made in the
invention .herein described. and since the .accom
panying .drawings have .been prepared only to
I2 wiilhefreleased andthe.gateâliïtopr~eventiur 5,5, illustrate Ithe relative .arrangement .and 4inter
ther material fromgravítating ldownwardlyinto
action` of ÃZ>parts and not >with regardfto accuracy
the loaseof'myhopper.l
In the aocomloanyingEienre .11»1 have illus
tratedfa simpliñedmethod .whereby thedisoharee
of `material .from .the .crushing chamber .through
the outlet. 2.1 maybeshutoiïfin theeyent, ol the
crushing plates being accidentally .separated
through the .introductlonof .a 4.piece of -foreign
matter therebetween, with .th.e„.conseguent„in_.ability of .the crushing plates. to continue .a
thomughA grinding action. î-ln this.. .connection
of idimensions :for manufacturingy purposes Vwhich
in View ofwthis disclosure .I consider .to entail
merely „mechanical skill together .with the skill
of ,the mechanical .draitsman,. and sincey many
apparently .widely diiîerent embodiments of this
f invention may .bemade Within the .scope of the
acoompanyingclaims without departing from the
spirit andLscope. ofthe same itisintended thatall
matter-.contained in the accompanying specin
621121011 Shall be .interpreted .as illustrative only
it will . be understood _ that.Y when .a . .particularly
andßriotina.limltingsenseand I desireonly- such
ñne >grind is. reouiredeveri a Small. quantity -~of
limitations. placed .thereon as justice dictates.
imperfectly ground. materialdischaraed into the
>-Whatl claim asmy Vinvention is.:
mass of »ground material, .would necessitate the 70 l. yA material .crusherlcomprising in. .combina
sifting oi the whole with. .consequent expense
tion, »a supportingstructure'„ a hopper, a, crush
and loss .of .time involved'. For this reason, it is
ing chamber, .crushing plates therewithin, .anon
necessary to provide means whereby any material.
rotatablq >end-.s_hiftalole shaft, a .driving mecha
remaining in the crushing-chamber .at .any 'time
nisni .for actuating. _at_leastone of .said crushing
that the plates. 4are rorcibly separated as. .above 75 plates, the plate. l.actuated lthereby being heid
against independent linear movement on said
shaft and acting to end-shift the same when
of said means allowing said swivelling cam to
move in a spiral direction against the face of
separated from the other plate by a damaging
obstruction, said driving mechanism also being
mounted for rotationrupon said shaft, crushing
plate separating mechanism comprising in com
said element to'permit the separation of said
being mounted co-axially with respect to said-
ing in mutually intercepting contact in the open
position of said hopper valve but out of contact
5. In a material crusher and in association
with a crushing plate releasing means, a cam
lever secured thereto, a lock for said lever, a
bination, a stationary cam thrust receiving ele
hopper valve, a hopper valve closing mechanism
ment provided with a spiral face, a swivelling
in association with said lever, said hopper valve
thrust cam designed under normal conditions
releasably to hold said shaft against end-shifting 10 closing mechanism comprising a valve lever, a
projection on said valve lever and a projection
and the plate thereon against separation from
on said first mentioned lever, said projections be
the opposing plate, said cam and said element
shaft, vreleasable means for holding a predeter
mined area of said swivelling cam in bearing con
tact with said stationary element in the operable
position of said crushing plates, the release of
said means allowing said swivelling cam to move
15 when closed and spring means operably con
nected to said valve lever to compel actuation
thereof and the consequent closing of said hop
per valve upon the unlocking and consequent re
lease of said first mentioned lever.
ina spiral direction against the face of said ele
ment to permit end-shifting of said shaft and 20 6. In a material crusher a non-rotatable end
shiftable shaft, a pair of opposed crushing plates,
separation of said plates.
one of said plates being co-axial with said shaft,
2. A material crusher comprising in combina
one of said plates being also shiftable with and
tion, a supporting structure, a hopper, a crush
by said shaft, said shaft being provided with an
ing chamber, a pair of crushing plates therein,
an end-shiftable shaft, one <of said crushing 25 internally screw-threaded drilling in one end
thereof, a rotatable, externally screw-threaded
plates being mounted for rotation on said shaft
stem extending into said drilling adustably to
but being held against independent linear move
end-shift said shaft and thereby adjust the
ment thereon so as to end-shift said shaft when
-a damaging obstruction enters between the
proximity of one of said crushing plates with re
plates, separating the same; automatic crushing 30 spect to the opposing one, and means for hold
ing 'said stem against linear movement during
plate quick releasing mechanism actuable upon
the operation of adjustably end-shifting said
the introduction of a damaging obstruction be
shaft as aforesaid.
tween said plates and upon the consequent sepa
-7. In a material crusher, a non-rotatable, end
ration thereof, including a swivelling thrust cam,
designed to maintain said crushing' plates in re 85 shiftable shaft, a pair of opposed crushing plates,
means for driving one of said plates, one of said
leasable spaced relation, a lever projecting from
plates being shiftable with and by said shaft,
said cam, a lock for said lever and means oper
a swivelling thrust cam mounted co-axially with
able upon the initial end-shifting of 'said shaft
respect to said shaft, a stationary cam thrust
to unlock said lever and permit rotation of said
cam to allow the further end-shifting of said 40 receiving element, locking means for holding said
cam in engagement with said element at least
shaft to a predetermined maximum extent and
in the operative position of said shaft, an in
the separation of the plate thereon from the
ternally threaded drilling in the end of said
other plate also to a predetermined maximum
shaft, an externally screw-threaded stem en
3. A material crusher comprising in combina 45 gageable with the thread in said drilling, said
stem being rotatable to end-shift said shaft and
tion, a supporting structure, a hopper, a crush
thereby adjust the proximity of one of said
ing chamber, a pair of crushing plates therein, a
crushing plates with respect to the opposing one,
supporting shaft, automatic crushing plate quick
means for holding said stem against linear move
releasing mechanism actuable upon the intro
duction of a damaging obstruction between said 50 ment during the operation of adjustably end
shifting said shaft as aforesaid and means for
plates and upon the consequent separation there
unlocking said cam locking means to permit ro
of, including a swivelling thrust cam, designed
tation thereof and consequent independent end
to maintain said crushing plates in releasable
shifting of said shaft and the spacing of the
spaced relation, a lever thereon, a lock for said
lever, means for unlocking said lever operable 55 plate shiftable therewith and thereby as afore
said from said opposing plate when a damaging
upon the initial separating movement of one
obstruction enters therebetween.
of said plates from the other under the influence
8. A material crusher comprising in combi
of an obstruction entering therebetween, the un
nation, a supporting structure, a hopper, a crush
locking of said lever by said means permitting
the rotation of said cam and thereby allowing 60 ing chamber, a pair of crushing plates within
said chamber of which at least one is rotatable,
the further separation of said plates to a pre
means for driving at least one of said plates, an
determined maximum extent.
end-shiftable, non-rotatable supporting shaft,
4. A material crusher comprising in combina
means for permitting movement of one of said
tion, a supporting structure, a hopper, a crush
ing chamber, a pair of crushing plates therein, a 65 crushing plates with said shaft to vary the
distance between the same and the other crush
non-rotatable sharft, at least one of said plates
ing plate, a screw-threaded extension on the end
of said shaft engageable with a screw-threaded
portion at one end of said shaft and means for
in combination with the foregoing, a stationary
cam thrust receiving element, a swivelling barrel 70 rotating said extension to end-shift said shaft
via said threads and move the said one plate
type thrust cam having a spiral cam face, re
therewith, all while said machine is in operation.
leasable means for holding a predetermined
9. In association with the device as defined in
area of said cam face in bearing contact with
claim 6, a setting dial upon one end of said screw
said cam thrust receiving element in the oper
being mounted for rotation on said shaft; a
crushing plate releasing mechanism, comprising
able position of said crushing plate, the release
threaded stem, a. locking device for holding said
setti-ngV diall against. rotation, :said y-lncliing «device
'comprising in r«zombination withua plurality nf
spacedy recesses-upon the 'perimeter :of :said dial,
a sprung bolt in light bearing engagementfwith
lever «following its _release from :saidloek without
the application -o? further effort, .and qonsegaent
separation ,of said shaft :mounted @late from iäaîd
opposing :plate Í¿a predetermined maxi-mum dis
said _perimeter and‘means designed toerigage said .5 tance.
bolt, andv hold, fthe-»same `in'engagementwith Iany
desired fone -of said recesses.
10. In association -With thefdeviee Iasf cleñned‘in
claim 8., Va«setting:dialeupon-orsiefend of saidfscrew
threaded ..7sirem, .a locking »device 7for holding; said
setting vdial against rotation, .said 'locking .device-»comprising in «combination >with .a ¿plurality
ofr .spaced recesses upon :the perimeter :of lsaid
dial‘„fa sprung» bolt in lighty bearing engagement
with said Y‘perimeter and. fmeans »designed to 'en 15
gagesaid holt and Aholdatlre same in engagement
with 'any :desired?one >oi” said recesses.
»11. .-Inwaomaterial Crusher having-an end-'shift
able supporting shaft vand a «crushing plate
mounted ~thereon =for . movement along Aits axis rof 20
rotationtherewith, -means including a lever ac
tuable 'while fsaid VvCrusher :is running `and vlock
therefor for :securing ¿said shaft against end
shifting- and :said iplate >aga-inst yielding ‘during
,« -I'DGE
The ‘following references are Jof .record in the
iile of. this :patent:
Raymond ________ __ Dec. 17, '1886
Pank ____________ __ Aug. f6, 11901
-Winchell ________ __ fMay î28, '190,7
:Pritchard __________ Dec. l2, 51911
‘McCulloch _______ _ Sept. `,19,V 1912
`Moore __________ __ Dec. ‘16, 1913
Letz ____________ __ Apr. l24,1917
Bryant __________ __ üan. `19, 19,26
`‘Martin __________ __ June T15, 1935
Krushel __________ __ Dec. 115, 1936
'Fehr ____________ __ July 51'5, »19,41
normal operation-with respectwto an "opposing 2,5
plate, said-meansalsofincludingïat ìleast one cam
elementi and `a cam vcontacting i elem-ent, said lever
being ~seeuredfto .one offsaid' relements, said cam
element being inclined in excess »of the angle
of `static friction to: facilitate îmovemen‘t »of esaid 30
'Dick ____________ __ïFeb. -10, 11942
Johnston __________ May.à1,1î1ï939
»'âwitzerland> ______ _- Nov.> 117, ¿1.3.17
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