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Патент USA US2387285

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Patented Oct. 23,y 1945
¿381,285
UNITED STATES `P.ß.T.l=:.-NT oFFlcs
2,387,285
CUTTER CHAIN
Charles F. Osgood, Claremont,
H., assignor to
Sullivan Machinery Company, a corporationof
Massachusetts
Application November 1, 1940, Serial No. l363,924
18 Claims.
This invention relates to kerf-cutting means,
and more particularly to improvements in cutter
(Cl. 26,2.-3‘3) '
showing another modified form 'of the invention.
Fig. 9 is a sectional view, similar to Fig. 3,
chains especially designed for use in the cutting
showing still another modified form of the inof kerfs in coal and embodying improved sup
vention.
`
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portingiand holding means for the cutter bits.`
In the several' embodiments of the invention
An object ofthe present invention is to provide
disclosed herein, the improved cutter Abit holder is
lan improved kerf-cutting means. Another ob
associated with va standard Vcutter chain vof the
ject is Jto provide an improved cutter chain espe
type especially designed for use'in the cutting'l of
cially designed for use in the cutting of kerfs in
kerfs -in coal. The cutter chain' consists of a
coal. A further object is to provide an improved 10 series of chain blocks i >pivotally- connected 'to
supporting and holding means for the cutter bits
gether -by strap links 2, and each chain block
of a cutterrchain. Yet another object is to pro
has a socketV 3 arranged at right angles to the
vide Van improved cutter bit holder. A still fur
path of travel ofjth'e- cutter chain. The block
ther object is to provide an improved cutter -bit . socket is preferably generally rectangular in cross
holder for a cutter bit of the double-ended, re
section 'and at its inner end opens into a, trans
versible type, commonly known as a “throw
verse opening îd. .'The chain ‘block is threaded
away” bit. Still another object is to provide an
at" 5 for thev reception of a standard set screw 6.'
improved cutter'bit holder adapted to use in a
The improved V’bit holder, in the embodiment
chain block of a standard cutter chain. >Yet an
of the inventi‘on'shown in Figs. 1 to 6, inclusive,
other object is to provide an improved detachable 20, ‘is
generally designated ‘l and has a head 8 >and '
lbit holder having a pivoted bit holder part for
an integral `shank 9, the latter being of rectan
holding 'the cutterbit in cutting position in the
gular cross4 section for reception ‘in the chain
holder. Still another object is to provide an im
proved detachable bit holder having a pivoted bit
holder part engageable with an exterior surface
block socket 3. Extending .obliquely through the
holder headvis a socket l0, herein vpreferably of
polygonal 'cross' section, adapted-to receive a cut'
of a 'chain block wholly outside of the block sock-l 2,5 ter bit, generally designated! I, of a convention-l
et 'for holding a cutter bit in cutting position in
al design. 'l Secured within the holderfhe'ad and
the holder. Still another object is to provide an
traversing' the bit-re'ceiving'sooket is a hardened
improved bit‘holder comprising a pair of cooper
metal -cross ypin l2, and `pivotally mounted on
ating Ahinged holder parts. A further object is 30 projecting ends yoi“ this pin are the side arms I3
to e provide an'improved cutter bit holder which
ofy a front h'older'par't l4,'hereinin the form of
is simple Vin design and rugged in construction.
a bit clamp, Aand> thefsides of the holder. head are
Other objects and advantages of the invention .
preferably cut away at l5 to receive the side
will, however, hereinafter more fully `appear in
arms
i3, in themanner shown. The ends of the
the course of the ensuing description.
cross pin are preferably'headed or peene'd. over
In the accompanying drawing there are shown
to retain‘th'e side arms of the hinged front hold
for purposes of illustration several forms which
er partin position thereon.
l
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the invention may assume in practice.
The'
cutter
bit
lh’shownmost
clearly
in
Figs.
3
In this drawing:
andY 4, may be of, the same general type as that
Fig. 1 is a side elevational view of -a cutter .40 'shown .inthe'patent to Ross 2,020,215, although
chain with which an illustrative embodiment of
the bit shaDëL may assumevarious >conventional
the invention is associated.
Fig. 2 is across sectional view taken on line
forms'without departing ‘from the spirit of the
invention. A'Ifhecutter bit disclosed herein isof
2-2 of Fig. 1.
triangularpsliape iniside elevation and of Vpolyg
Fig. 3 is a view in central longitudinal section 45 ona'l' cross _section and'has plane cuttingfaces
ltaken on line 3_3 ‘of Fig. 2.
I6, t6' formed, _so tO speak, one at each'of the
Fig. 4 is a detail sectional view taken substan
equal sidesof the triangle; andthe cutting faces”,
tially on line 4-4 of Fig. 1.
at lthe,extremities of the `cutter bit, ~t'err'ninate
Fig. 5 is a detail sectional view taken substan
in cutting points l1, l1. ",I‘he> plane cutting faces
tially on line 5-5 of Fig. 1.
50 I6, I‘B A.are 4of elongated diamond shapeand are
Fig. 6 is a perspective view of the improved
individually symmetrical as to, both major and
bit holder.
Fig. 7 is' a sectional view, similar to Fig. 3,
showing a modified form of the invention.
minor axial lines’. This cutter bit is. of the'gso
called> ‘.‘throw-away” ¿type Jand, when yboth cut->
tingpcints‘ become dull, may be discarded due '
'Fig'. 8 is a sectional view, similar to Fig. 3, 55 to its extremely inespensive design.
l
L @387,285
43 receivable in the bit notch to hom the cutter
Th‘e cutter bit is insertible in the socket I0 óf
bit against endwise displacement from the hold
the holder head with its -inner, inactive cutting
er. The rear curved surface of the cutter bit is
face resting against the cross pin I2. The cross
seated within a recess 44 at the forward side of
pin therefore serves two purposes in that it acts
both as an abutment for the cutter bit and a 5 the holder h‘ead. When the set screw is tight
front holder part I4 has a surface I8 engageable
with the inner portion of the active cutting face
ened, the holder shank 42’ is forced inwardly
within the chain block socket and the pivoted
front holder part, due to its engagement with
holder head socket, and is swingable inwardly out
has a surface 52'engag`e`able w'ith'the inner por- .
pivot for the front holder part I4. The pivoted
of the cutterbitiand a surface I9 ,engageableîwith- ’ the exteriorv surface of theïchain block,v engages
the exterior- surface 20 of the chain block outside' 1 the cutter bit-Withïits portion 43 received4 in the
bit notch 39, so that the cutter bit is firmly held
of the block socket.
>in cutting position within its recess 44 in the
When the holder shank 9 is inserted in th'e
holder h'ead. In Fig. 9 a bit-receiving socket 45
chain block socket 3, the surface I9 of >the hinged
extends obliquely completely through the holder
front holder part I4 engages the exterior block
. head. 46, so that the rear, inactive cutting end of
surface 2D, so that upon further insertive move
a cutter bit, generally designated 41, extends
ment 0f the holder shank in the block socket, the .
rearwardly through the socket into engagement
surface I8 of the front holder part engages the
with the> exterior surface of the chain block at
inner portion of the active front cutting face of
the rear side of the block socket. The cutter bit,
the cutter bit to hold the latter in cutting posi
in this'in'st'ance, is of trapezoidal shape in side
tion in the holder head socket with its inner,_in
elevation ,and has relatively inclined plane cut
active cutting face ,resting firmly against 4the
ting facesj48,`148, lying in the sides of a dihedral
c?osslpi? I2. Thesetscrew 6 is'then adjusted
angleV and terminating in cuttingpoints 49, 49 at .
intoefr'lëagelne'nt'with' the holder shank for firmly
theopposite extremities' of the _cutter bit. Thesecuring theY holder in position onA the chain
cutter» bit' 'has its" active'jcutting point project
block. It is accordingly evident that the hinged
ing `fo‘rw'ar¢îlly'_V and i outwardly :from the holder
front holder part I4 is swingable outwardly into
head socket, 'and the pivoted'. front holder part A
engagementwith the front 'cutting face of the
â'iILÁwhich> is hinged" at "5I >on the' holder head,
bit to' prevent exit ofthe _cutter'bit from the
of engagement with the cutter bit to permit for 30 „tion of the active cutting `face`of the bit, Yto pre
vent forward exit of the'bitffrom theY holder
Ward‘endwise release’ ofthe bit from the holder
socket." "The‘pivoted front clamp part has a sur
face 53 'engageable With‘ the exterior surface ofî
The several modified embodiments of the in
head‘socket.
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the chain' block at the forward side of the blockvention 'shown in Figs. '7; 8r and 9 are broadly
similarto that described above; In these em '35,4 socket. 'The inner, inactive cutting facefof the
V:cutter bit rests firmly against the exterior surface `
of thejchain block,> and ,when the ‘set screwis
tightened _the holders-'bank 54 isïfo?cëd inwardly '
path'oftravel'of the cutter chain to enable the
within the block socketv and,'due to the engage
inner endof Vthe _set Vscrew to engage an'inclined
surface 23.v on a, holder Vshank 24 so that when the 4Qqm`ent ofth‘e‘pivoted front holder part' with vthe
setj’vjscrew .'is‘ tightened Vthe holder. sh'ank will Vbe ' “exterior Ysurfac'ebf thechain block,"'the surface 52' on'the h'older part'en'gages Vthe inner portion
forcedl ìnwardly’within >the holder block socket.
i
bodiments, however, the 'set screw opening 2l in
the chain block„22 vis' inclined with respect to the
of the active cutting face of the bit to clamp the
In Fig. 7 "a holderfhead 25 has a front'rècess‘ 26
foi-'receiving a' cutter bit, generally designated
21.`- „This cutter'bit is‘o'f trape'zoidal shape in side
elevationfand' has cutting 'points 28, 28 at its op- i
posite end'sf,',theseîpoints being formed 'atth'e'e'x
tremitiesicfe. front plane, cutting' face 29,. >The
pivot :pin 30 for'. a front holder part 3l, in this
cutter bit firmly in Ycutting position. As in Figs'.
*_'7 and' 8,_the 'cross pinjsecured within the holders.
"'head’serves' only asa hinge pin. Also’i'n" these
threemodiñed embodiments, the set screw when
tightenedjefl’ects >automatic clamping 'of the cut
terjbit‘ñrmly in‘rcutting position with.a`vise-like y
instance,'_ does not' Vserve as a bit abutment, and 50 action',V since `insertive movement Vof 4the holderl
shank 'within the block socket automaticallyI
the' inner, ,inactive 'end'of‘the’ 'cutter bit 'engages '
effects' tightening Yof the front holder>> part; an abutment‘surface'32 on'the holder head. ' The'V
Otherwise the embodiments' 'of the/invention "
pivot -pin ~3Il‘is' secured within the holder h'ead.
shown- in Figs. ’7, Sand 9 are similar to that
and is’ spaced vrearwardly from` the Vfront bit- ’
abutment surface 32 in the' manner shown.
The Y
hinged‘front holder part 3l, _asin the form of
the invention above described, serves as a bit
clamp and has a surface 3.3 engageable-with the
frontjbitface Y29 'and a 'surface v34 Vengageable
with the’ exterior of ’theichain block. When the
shown in Figs. Ito 6, incusive.V
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As a result; of VVtlçiiginvention,_it will` be noted
thatan improved ¿kerf-cutting..cutter` chain is
provided> having improved cutter,~ bit supporting
and holding’ means for firmly _ ,sii-moorting'> „and
60 holding aV cutter bit in cutting position` on a chain
set screw’isitightened., theholder shank isÍforced
block. jfItwill further benoted that by the pro`r-`
inwardlywithin th'e _chain block socket and the
pivoted front holder part, due to its engagement
ing a hinged from;` holder part engageable with
vision of the'improved‘cutter'bit holder embody
against release from 'the holder‘head recess. In
the exterior of the chain block wholly outside of
therblocksocket, the >cutter bit is firmly `clamped
in cutting position on the block.> It will further
Fig. 8> thefcutter bit, generally. designated 35, is
crescent shaped and h'as acurved rear surface 36
invention, .the cutter bit holderis of an extremely
with the >exterior surfaceof‘the chain block, en
gages the _cutter ibit to clamp‘theïcutter bit firmly
and a plane 'front cutting face 31, the latter ter
minating at _the opposite extremities of thebit in
cutting points 38,V 3,8». „The forwardcutting face
31 of A,thebit is"- notched atV 39 midway lbetween
thecutting points, and the pivoted front holder
part 40,'which is pivoted. on a cross pin'4I se
be noted that-„in the several'jembodiments ofthe
simpleV and inexpensive design `4andÍn‘lay be used
in astandard chain block__Other uses and' ad'-~
vantages of the invention 'will‘bercle‘arly appar-fv
ent to those skilled in the art.
. .
_
WhileA there arein _this application specifically
described'several f__orrnsY which the invention may
’ cured Within the'gholder head 42, hase. portion 75. assumeinpractice, ity/illnbeunderstood that '
assaggi;
these >forms of the same are‘shown forfpurposes
of :illustration >and that the invention. may :he
chain -block :having ~ a, socket, of a- bitrholderl com
embodied in f various» other: forms Withoutî depart
erating Vto secure a cutter bit in cutting position
on vsaid -block and means for pivotally-connect
irigfrom its spirit or thefscope :of `the :appended
prising pivotally connected holder parts coop
ing said holder parts at the bit-*securing end of
the holder, one of >said holder .parts having ‘a
Letters Patent is:
'
shank received in -said block socket and the other
1. A detachable cutter bit holder ladapted for
holder part engageable at the end thereof remote
mounting on a chain block of a-cutter chain,
from ‘its pivot lwith'an exterior surface of said
comprising a head and a shank, thev latter adapt 10 chain .block .Wholly outside of said block socket
ed for reception in a chain block socketand said
when the holder is 'in bit holding positon with
head having afb-it-reoeiving socket, and a front
respect to the block.
> .
‘
holder 'parthingedly connected at one endfto Said
y8. In a cutter chain, -thecombination .Withva
claims.
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What -I .claim as 4new and desire to `secure 'by
holder head at the outerend-of the Vholder and
chain block having a socket, of'a bit holder com
engageable at its o-ther end with a cutter vbit re 15 prising pi-votally connected holder-parts cooperat
ceived in said head socket -for holding a cutter
ing to hold'a cutter bit in> cutting position on the
bit in cutting position within-said head socket.
chain block, and means at .the outer end "of >the
2. A detachable cutter bit holder comprising .a
holder for pivotally connecting said parts, one of
head and a shank, said head having abit-receiv
said parts having Ia shank receivable in said block
ing socket, a front holder part »hinged tosaid
socket and the other part disposed wholly outside
holder head and having a surface engageable with
of said'blockfsocket vand engageable at the end
a cutter bit received in said socket for holdin-ga
thereof remote from its pivot with an exterior
cutter bit in cutting position within‘said socket,
surface on the chain block when the holder vis
and a cross p-in fixed within said holder head and
in bit holding position with> respect toftherblock.
traversing said socket, said pin serving as an 25
9. In a cutter chain, the .combination with a
abutment for the inner end of `a cutter bitre
chain'block having a socket, of a bit holder for
ceived in said socket and also as a pivot for said
holding a lcutter bit in cutting position .on the
hinged front holder part.
'
chainv block comprising cooperating lbit holder
3. A detachable bit holder adapted lfor mount
parts hinged together, and means at the outer i
ing on a chain block of a cutter chain, .comprising 30" end of theholder for hingedly connecting `said
a head and an integral shank, the latteradapted
parts, one -of said .parts having a >portion `re
for reception in a socket of a chain‘blockand said
ceivable in said block Asocket and the other 'of
head having a socket adapted to receive a cutter
said parts being disposed wholly outside of the
bit, and a, front holder part hingedly connected
block socket and engageable at the end thereof
t0 said holder head at the outer end of'therholder,
yremote from its hinge withan exterior surface
the hinge located near the rear side of said holder
on the chain block when theholder is in bit hold
shank, said hinged front >holder `part swingable
ing position with respect to the block.
about its hinge into engagement with ,a cutter
10. In a cutter chain, the combination with a
bit in said head socket and engageable Iwith a
_chain block havinga socket, of „a bit -holder for
chain block for holding a cutter bit against re 40 'securing a cutter bit in cutting position on said
lease from said head socket.
chain block comprising cooperating bit holder
4. A cutter-bit-holding `means »comprising .a
parts hinged together, and meansat the outer
member having a socket adapted to-‘receiveiia cut_
end4 of the holder for hingedly connecting said
ter bit, a cross pin secured to said member and
parts, one part having a socket adapted to re
traversing said socket and against which a cutter
ceive a cutter bit-and a portion receivable in said
bit received in said socket is adapted to rest, and
block socket and the other part having at the
a bit-holding member pivotally mounted on said
end .thereof remote from its hinge spaced sur
pin and engage'able with a cutter bit in said socket
Lfaces one engageable with a cutter bit in said bit
for holding the bit against release from said
socket.
-
receiving socket and the other surface engage
50 able with an exterior surface on said chain block,
5. A cutter bit supporting and holding means
said latter part being disposed wholly outside
comprising a holder member having al socket
of said block socket when the holder is in bit
adapted to receive a cutter bit, a holder part
holding position with respect to the block.
hinged to said holder member and adapted to»
11. In a cutter chain, the combination with a
engage a cutter bit received in said socket for 55 chain block having a socket, oi a bit holder re
preventing release of the bit from said socket,
ceivable in the block socket for holding a cutter
and an element secured to said holder member
bit in cutting position on the chain block compris
and traversing said socket and providing an abut
ing a pair of cooperating holder parts hinged to
ment against which a cutter bit received in said
gether, and means at the outer end of the holder
socket is adapted to rest, said abutment-provid
for hingedly connecting said parts, one part hav
ing-element also providing a pivotal mounting for
ing a bit-_receiving opening extending there
said hinged holder part.
through, and a cutter bit received in said open
6. In a cutter chain, the combination with a
ing with its rear end resting on an exterior sur
chain block having a socket, of a detachable 'oit
face of said chain block, and said other part en
holder having a shank receivable in said block 65 gaging an exterior surfacer on the chain. block
socket and an integral head disposed outside of
Wholly outside of the block socket when the hold
said socket, said head having a recess for receiv
er is in bit holding position, said latter part en
ing a cutter bit, and a holder part hinged at one
gaging said cutter bit for holding the latter
end to said holder head at the outer» end of the
against endwise release from said opening.
holder and at its other end engaging the exterior 70
12. In combination, a cutter-bit-holding means
surface of said chain block outside the block
comprising cooperating holder parts hinged to
socket and at said latter end engageable with a
gether at the outer end of the holding means,
bit in said head recess for preventing release of
one part having la recess for receiving a cutter
the bit from said recess.
bit, and a cutter bit received in said recess and
7. In a cutter chain, the combination with a 75 having a notch, said other holder part having
4
.25387,285‘:
the extremity of .the cutting point, and a member
hingedly connected to said holder member at the
outer end of the ,holder in. adjacency to the bit
. 13.v In arcutter chain, a `chain .block havingal
seat,. the'hinge axis located on the holder in ad
socket, andrholder means. for securing a cutter
bit in cutting position on said block comprising'ì 5;, Vance of .the rearmost point of contact of the :bit
with the bit seat and said hinged member swing
cooperating, relatively swinlgable holder partsv
able upwardly about its hinge upon insertion of
hinged together at the outer end of the holder
the holder shank into a block socket to engage
means, one part having a portion disposed in said
a portion of said front bit face to block exit of the
block socket and the other part swingable at one
end about its hinge and disposed Wholly outside lçïbit from its seat.
17. A detachable bit holder adapted for mount
of said block socket when the holder means is inl
ing on a chain block of a cutter chain, compris-'
bit holding position.
1
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ing a head and a shank, the latter being adapted'
~ 14., In ,a cutterchainga chain block having a.
for reception in the socket of Áa chain block and
socket,> and, holder means for securing aV cutter
bit in _cutting position on said block comprising 15. î adapted for engagement by securing means en_
the block, said head having a bit-receivingrecess,
cooperating holderiparts hinged together at the'
a double-pointed reversible cutter bit seated in
outerend of the holder means, one part having
said head recess'with a cutting point projecting
a zportion.disposed in said‘block socket and the
outwardly therefrom in position to cut, and a
other part swingable about -its hinge and clis
posed wholly outside of said block socket and en 2Q;¿member hingedly connected to said head at the
outer end of the holder in adjacency to said head
gageable at ,the end thereof remote from its-hinge
recess, the hinge located on the holder at a point
with anexterior surface on the chain block when
outside of the point. of engagement of the se
the holder means in in bit holding position. " - I » ~
curing means with said shank, said hinged mem
l5. A detachable bit holder adapted ì‘or mount
ing on a chain block of a cutter chain, comprising y25-;¿ber engaging said bit upon insertive Ymovement
of the holder shank in a socket of a chain block.
a head and a shank, the latter adapted for recep
a portion received in said bit notch for prevent
ing release of said bit from said recess. ,
'
18. A bit holder adapted for mounting on a'
chain block of a cutter chain, comprising a head
having abit-receiving recess, a double-pointed
and a shank, the latter being adapted for re
reversible cutter bit seated
said head recess
with a cutting point projecting outwardly there 30.;'.ception in the socket of va chain block and said
head ,having a l bit-receiving socket, a double
from in position to cut, and a member hingedly
pointed reversible cutter bit having one portion
connected at one end to said head at the outer
disposed in said head socket and the other por
end of the holder in adjacency to said bit-receiv
tion projecting therefrom, and a bit-securing ele-`
ing recess, said hinged member operable to en
gage at its other end a portion of the project 3.5..':ment hingedat one end to said head at the outer
end of the holder. and having spaced abutmentk
ing cutting'point for preventingl displacement of
surfaces at its other end, one vvoi said abutment
the bit fromk its recess.
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surfaces adapted for engagement with an ex
16. A detachable bit holder adapted `ior mount
terior surface of a chain block and the other
ing on a chain block of a cutter chain, comprising
abutment surface engageable with the projecting
a holder member having a bit seat, a double
portion of said cutter bit, said hinged element
poínted reversible cutter bit seated'in said holder
swingable on its hinge into and out of bit-se
member with a cutting point projecting forward
curing engagement with said projecting bit por
ly and upwardly in cutting position with said pro
tion in a socket of a chainblo'ck and said head
jecting point presenting a flat front face in
clining slightly downwardly and rearwardly from
ëätion.
CHARLES F. OSGOOD.
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