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Патент USA US2586728

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Feb. 19, 1952
E. c. SHAW
;
OSCILLATABLE BARK-REMOVING JET HAVING
2,586,727
VARIABLE AMPLITUDE OF‘ OSCILLATION
Filed May 22,‘ 1950
2 Sl-IEE'1_‘S—--SHEET l
50'@
5M2‘
$4, WWW
Mme/mag
Feb. 19, 1952
_
E, c, SHAW
2,586,727
OSCILLATABLE BARK-REMOVING JET HAVING
VARIABLE AMPLITUDE OF _ OSCILLATION
Filed May 22, 1.950
2 SHEETS-SHEET 2
WM»
G/wmX £1
Patented Feb. 19, 1952
UNITED STATES PATENT OFFICE
2,586,727
OSCILLATABLE BARK-REMOVING JET HAV
ING VARIABLE AMPLITUDE OF OSCILLA:
TION
Ernest 0. Shaw, .Milwaukee, Wis., assignor to
Allis-Chalmers. Manufacturing Company; Mil
waukee, Wis. - -;
Application May 22, 1950, Serial No. 163,493
5 17 Claims. (01. 144-208)
This invention relates to devices for cleaning
and removing'bark from timber by means of a
high pressure hydraulic jet. More speci?cally,
this invention ‘relates ‘to that type of hydrauiic
barker in which an oscillating motion is imparted
to the barking jet as timber is conveyedthrough
the machine. The principal object of the in
vention is the provision ‘of new and improved
barking devices.
I:
'
'
2
Accordingly, it is a primary object of this in
vention to provide a machine that will result‘
in greater speed; effectiveness and economy in
1 utilizing a. hydraulic jet to remove bark and all
foreign matter‘. from timber in the preparation
for further processing as lumber or pulp.
Another object of this invention is to provide"
a‘ machine in which the amplitude of‘an oscile'"
lating hydraulic jet may be adjusted, While the
'
"To ‘be economically successful a ‘hydraulic
barking machine'must remove the bark and for
eign material from the surface of the log effec
machine is in operation,‘ to reduce ‘overthrow ‘of
water beyond the'edge or over the top o'f'logs‘
of varying diameter.
tively, economically, and at high speed. ~I'I‘he
oscillating nozzle type barker was developed to
'
Still another object of this invention is to
provide'a'machine in which the amplitude of‘ an
oscillating hydraulic jet may be automatically‘
achieve faster barking;- In ‘the usual barker of
this type the nozzle ‘oscillated about an a‘xis'in
a ‘plane parallel to'the longitudinal axis of the
adjusted, While the machine is in operation.
log being barked with the nozzle jet axis oscili"
sletv'forth willv‘vbe' apparent as the description of
_
' Objects and advantages other than those above
lating in a plane perpendicular to the-axis of " ii: the invention proceeds.’
oscillation.- The effectiveness of this “type of
The novel features of the invention and how
nozzle however was rathenlimited ,s'ince met?
the-objects are'_'at_tained will appear from the
specification "and: the accompanying drawings
from
will not
such
be able
a nozzle
to contact
will glance
the entire
off the
1,80?log‘
of'the
showing an embodiment ‘of ‘the invention and
log’sycirc'umference exposed to a single nozzle; " forming apart .of_ this application, “and all of_
It was therefore necessary to either ‘provide an_'_
these novel" features are intended to be pointed
undesirable number ‘of nozzles spaced aboutjthe
log'or to, rotate the1log',‘in‘order_ that'th Jets'
be. brought to bear on the entire peripheralfs‘ur-f
face ofvthe log. A ~furtherdevelopment‘‘was the
nozzle structure in which the " nozzle'joscillates’
about an axis parallel to "the. nozzle“ j'et' axis,v
withjthe axis of oscillationj?in' a. plane perperi-i
out in the claims.
' "In the drawingsz,
‘
Fig.1.isaside view. ofa barking machine to;
-' cording. to the present invention with part, of the
covering structure cutaway to more clearly dis
close the various mechanisms included in the
machine;
,
dieular'to the surface ,‘of the'log'being barked.‘ , . l . Fig. 2_is an [end-view of the barking machine
This type of barking‘ device " is, described and ‘ from the discharge end of the machine, with the
claimed
Sam
the pending vaplplication of Fred V.‘
N; e153,’.7‘02i" _ This ‘developmentyadded ,
grew _ er j e?ectivenessito the high speed ljachieved'
by 'the?oscillation of ?th'ejnoz‘zle in that a single"
nozzlecouldreach 180° "ofthe'peripheral sure-l.
face ofn'a‘log thus making it possibleto barkthe
entire surface‘ of'a nonrotating'log by using onlyE
two nozzles.“ It‘is the nature or the prese'
vention'toprovide
novel means for adillstirig't
‘
end covering structure removed;
vFig. 3 is a cross sectional view taken on plane
IlI._-III of Fig. 1;, and ' .
"Fig. 4 is a schematic diagram of anautnmatic
' control system for the barking machine of Figs.
1, 2 and 3.
Referring moreparticularly to Fig. 1 and Fig.
2, the barking machine comprises conveying
means I for receiving and carrying a log endwise
amplitude of‘ oscillation of {either _of' the-above; . through the machine, nozzle assemblies 2, recip
mentioned types of oscillating nozzles, to increa
the economy of operation by limiting nozzle
_ -
lation to the effe'ctiireangle and reduce the waste‘
d?energyl that occurs'byithe,jettraveling bey, rid;
the edge "oi- over'the‘to'p' of'th'e 102s being‘ barked?
rocating driving means 3 for imparting an oscil-i
lating motion to the nozzle assemblies 2, and.
?uid supply means 4 for supplying hydraulic
lipid under pressure to the nozzle assemblies. . A
casing '5 encloses the machine to prevent water
2,586,727
and chips of bark escaping to the surrounding
ward or away from the turning axes of the cou
atmosphere and also to support elements sus
pended above the conveying means I.
The conveying means I are herein shown as
plings I3, thereby changing the e?ective length of
the cylindrical arms l8 in the linkage from the
crank arms 26 and thus changing the angle
through which the couplings l3 will oscillate. A
stiifening web 32 is attached and made integral,
comprising V type log carrying rolls 6 with -a;_
shaft 1 extending from each side of the rolls ‘6,
and supported by brackets 8. The rolls 6 may]
by some means such as welding, to each of the
be driven byany suitable means, here shown as
cylindrical arms l8, ?exible couplings I3, and
the motor 9, in any combination of driven and
conduit members l5, to make a stronger and
idler rolls desired, to transport the logs through‘ 10 more rigid structure.
‘
the machine. The nozzle assemblies 2 are shown
Barking jets issuing under high pressure from
mounted on-abase-member l2 on: each side of‘
the structure describecl, ‘that is, ata 90° angle to '
‘the conduit‘members ‘l5, will'lresult in a con
siderable reaction to the force of the jets which
“would tend to bend the conduit members away
the rolls 6. The nozzle assemblies'2 include'?ex
ible ?uid transfer means here shown as the
?exible ?uid couplings I3‘. The couplings 13 are‘?
mounted on the base members l2 with their
turning axis in a plane that'isperpendicular'to
the longitudinal axis of a log on the rolls 6. ‘Jet~
from the log being barked. This would result
‘in-breaking the conduit members l5 or at least
“cause ‘the'jets to‘strike the log at a less effective
angle. Bracing means are therefore provided to
issuing means, here shown as a conduit member
IS with a nozzle l6 attached thereto, are-‘cone "20 ‘@eliminate .the‘i‘possibility of the conduit mem
bers l-5 Ibreakingorbending away {from the log.
nected to the movable portion " ‘of "each of the
?exible ?uid couplings l3. The couplings l3 .
The bracin'gi'means are shown as a brace plate
‘38 mounted one base 39. A shoe 40 with bear
serve the nozzle assemblies 2 both as?uid supply 7
?ttings and as the fulcrum for'the oscillating
motion imparted to the conduit membersvl5 by-‘f
the reciprocating driving'means 3 as will more
fully ‘appear as the'description of the invention
proceeds. The ‘conduit I5 and nozzle l6‘form an’
L-shapedstructurewhich, if’ stationary, would
direct a barking jet toward the log and along an.
axis parallel to the turning axis'of-t'he coupling
l3, that is, the nozzle ‘jet axis of each ‘of the
nozzles 16 parallelsthe axis of oscillation at any
position on the‘arcuate path traveled by each
oscillating nozzle. This type of oscillating nozzle
assembly is more \fully described and claimed in
ings II ‘is attached to each conduit member l5
tovrideo'n‘fthe brace plates 38 and thereby brace
the conduit members I5 against the reaction of
.the 'jets with a‘minimumcf frictional resistance
between'the shoes wand-the brace .plates .38.
The ?uid supply means 4 ‘for delivering high
pressure Y-?uid. ‘to "the' nozzle assemblies 2 1com
prises a fluidrisupplyfpipe 45 with headers 46
‘extending 'to each side LOflithe conveying means
I. ‘Delivery tubes l‘l?ltransmit the ?uidfrom
‘the headers 46 tothe ‘nozzle-“assemblies 2. .‘The
35 tubes 41, 48 deliver hydraulic ?uidtob'othsides
' oiv the "?exible ‘?uid couplings <|3 to balance‘the
the copending'Sams applicationys. N. 153,702.
forces on'thev couplings and thereby enable them
The means provided to oscillate v‘each ofwthe
conduit members 15 about the turning axis‘ of
wear.
to oscillate without ‘binding or ‘causing ~ excessive
theirrespective couplings l3, includes anexter~ 40 ‘In ithe operation o'fthev barking machine v‘as
hereinbefore describedflogs of varying: diameter
nally screw threadedshaft member I1 connected
are ‘received. and carried. in the :crotch of‘the
to the nozzle assembly "2 by means or a cy1indri
rolls 6. Small-logs will ride a little deeperin the
cal arm I8 attached to the movable portion of
the coupling l3. Referring‘ now also to Fig.-3,1the ‘r crotch ofthe rolls than large logs, butthis‘ varia
externally screw threadedshaft His mounted 45 tion ‘will be slight. The principal ‘variation will
concentrically within the cylindrical arm 18. ' An
‘ be ‘in‘the level of vthetop of Ithe logs above “the
internally screw threaded member 2| is mounted
supporting rolls. ,. The described oscillating mech
anismimayrbeadlusted to change-the upper limit
of the-nozzle travel while. leaving the lower limit
ed ‘shaft l1. vA crosshead member 22 is slidably
mounted about the cylindrical arm l8 :and is. 50 of ‘travel-‘substantially una?ected. That is, the
concentrically about the externally screw thread
bolted to a ?ange“ 23 of the internally’ ‘screw -
threaded member 2! that extendsthrough a slot
24 in the cylindrical arm l8. A‘ connecting arm
25 is attached on one end to theic'ros'shead'mem
ber‘ 22. The otherv end of ‘the 'connectingiarm
25 is attached to'a ‘crank arm "26 ‘which is ‘
mounted ‘on 'anadlacent‘end of "a Shaft'? that;
extends across the top of the casing 5 and‘is sup
ported by the brackets 28, 29 mounted ontopof I
the casing 5. The shaft 2'! and crank armsv 2,6 60,
attached thereto ‘are'shown as being'rotated‘by f‘
an electric motor 30 also‘ mounted 'on top'of the
externally ‘screw threadedshafts I‘! may be ro~
tated by- the reversible motors vill-to move the
crosshead .niemb'ers 22 ‘closer ‘to the turning axis
of "the - couplings T13. to thereby "reduce" the effec
tive ‘ length "of 'thelcylindrical‘ arms l8 1 in. the link
»I'ag'e 'fromxthe driven crank Tarms 26‘and thereby
raise the upper limit of» nozzle l??travel. Simi
larly, rotating thev externally screw threaded
shafts ll vinithe opposite directiontwill move
the crosshead members'22 fartheriaway from
the turning axis of the couplings l3 thus in
crea‘sing the ‘effective length of Tithe cylindrical
casing 5. The rotational motion of the ‘shaft 21
arms ‘18 ‘in“ithe linkage Jfrom the driven crank
is thereby converted to the 'recipro‘catingmoti‘on
arms v26, ‘soias' to‘ lower the _' upper limit ‘of nozzle
of "the "connecting ‘arms 25>Which, being “con 65 travel. Theafores'aid adjustment may be made
nected to the "cylindrical 'arms 18, cause the
without stopping the-machine. "Energiz'ation of
?exible couplings iii to oscillate and the bark
the ‘motors '3 l‘may" be ‘controlled by an operator
ing‘jets ‘to oscillate transversely‘a'cross‘each side
from a remote position that enables‘ him to ob
or ‘the log. ‘A 'teleoperated ‘reversible electric
serve the effective limit'of nozzle-travel so that
motor ‘3| is mounted on each 'ofthebylindrical' 70 he may‘ keep the overthrow of water ‘over, the‘
arms vl8 to rotate'the‘externally screw threaded
top'of the logs‘to a‘minimum'and yet allow'the
shaft l'l'mounted within the'cylindrical arm' l8.
jets to completely'ccver‘the log being barked.
Rotating the ‘externally'screw threa‘ded‘shafts I’!
'It ‘is desirable‘, howevento‘l‘keep the number
will “move the internally screw threaded mem
of operating vpersonnel to a minimum. ‘Means
bars '2 I ' and‘th‘e ‘crosshe'ad members '22 ‘ either ‘ to 75 are therefore provided for complete ‘automatic
5
2,586,727;
6
control of the amplitude of travel of the nozzles
IS. The automatic control means include feeler
switch actuating arm‘ 15 mounted between the
means for determining the size of a log in barking position upon the rolls 6, and control means
noid switches ‘I6, 11 are provided to control the
connection of _-motor.. 3| to source 62 for either
forward or reverse operation of the motor.
When switch 56 is closed switch 11 will close to
responsive to the position of the feeler means to
energize the teleoperated motors 3| to adjust the
amplitude of oscillation ofthe barking jets-in
accordance with the size of. the log being barked.
switches 56, 51. ‘A pair» of normally open sole
‘ rotate the motors 3| in one direction and when
switch 51 is closed switch 16 will close to rotate
v Asshown in Fig. -1_ ‘and Fig.‘ _2 the feeler means
the motors 3| in the opposite direction. A pair
comprise a feeler member 5| mounted, above the 10- of limit switches 18, 19 are provided-limit switch
rolls 6,_on a rotatable shaft 52 extending through
18 in series with switches 56 and ‘I1, and limit
both sides of the casing 5. ; The free swinging
switch 19 in series with switches 51 and 16 to
end of the feeler member 5| will, due to» its own
limit the travel of the crosshead members 22 on
unbalanced weight, ride upon the top of a log
the externally screw threaded shafts ll.
as the log passes beneath the feeler member.
The transmitter 60 comprises a single resistor
As the feeler member 5| drops from a large log
80 having its terminals connected with the rec-.v
to a smaller log or is pushed up by a log larger
ti?er 64, and brushes 8| connected in any suite
than the one preceding it, the swinging motion
able manner‘ to rotate upon rotation of the
motors 3|, engageable with different portions of
of the feeler member will-rotate the shaft 52.
Adashpot 53 is mounted‘vv on top of the casing 20 the resistor 80 at selected positions. The brushes
5, and is connected to the feeler member 5| to
8| are connected to the coils 7|, 12 of the re
prevent the feeler member dropping with a force
ceiver 6| to thereby cause the rotor ‘I3 of the
su?icient to cause damage to-thefeeler means._
receiver 6| to rotate with the brushes 8| of the
Circuit completing means here shown as a pair
transmitter 60.
of ‘normally open, switches 56, 51, are attached
In the operation of the described machine
to one end of the shaft 52 andyare operated in
when a log of decreasing diameter or a log of
a manner hereinafter described in greater detail
smaller diameter than the log preceding it passes
withreference to Fig; 4.. to control the energize.
beneath the feeler member 5|, the feeler mem
tion of themotors 3 |‘. . ‘It maybe generallv stated
ber will swing in‘ a downwardly direction and
however that either of the switches 55, 51, when 30. the shaft 52 will rotate clockwise. The clock-‘
closed, will operate to energize the motors 3|
wise rotation of the shaft 52 will also'rotate the
to rotate the shafts | 1, to therebv move the
switches 56, 51 in a clockwise direction about
crosshead members 22 relative to the turning
the axis of the shaft 52. When the shaft 10 of
axis of the couplings l3. When the feeler
the switch 56 comes in-contact with the actuat
member 5| is raised. switch 51 will be closed 35 ingiarm 15 the spring 69 will‘ be compressed
and the motors 3| will be energized to move the
and the contact member 68 will bridge the con
crosshead members‘ 22 toward the couplings | 3.
tacts 6'! and complete the circuit through the
Similarly, when the feeler member 5| is lowered,
limit switch 18 to close the solenoid switch 11.
switch 56 will be closed, and the motors 3| will
When the solenoid switch 11 is closed, the motors‘
be energized to rotate in the opposite direction 40 3| vwlil rotate the externally screw threaded
to move the crosshead members 22 away from
shafts IT to cause the crosshead members 22 to
the couplings | 3. A followup system also de---'"
move away from the couplings l3, to the left as
scribed later in detail with reference to Fig. 4,
shown in Fig. 1 and Fig. 4, to lower‘ the upper
allows the motors 3| to move the crosshead mem
limit of oscillation about the couplings I3. As
ber to the position appropriate for the size of
the motors 3| and shafts I1 rotate, the brushes
the log being barked, and ‘then interrupts the
8| of the transmitter 66 will also rotate, counter
circuit. The followup system includes a trans
clockwise as shown, and impress a voltage on
mitter‘66' mounted on one of the motors 3| and
the windings ll, '12 of the receiver 6| that will
driven in-any desirable manner to turn with the
cause the rotor 13 of the receiver 6| to also
motors 3|. A receiver 6|, energized by the trans 50 rotate counterclockwise and move the arm 15
mitter 66 is mounted on the casing 5 to coop
away from the switch 56. As long as the feeler
erate with the switches 56, 51 to open the switch '
member 5| continues to swing downwardly the
that has been closed by the movement of the
switch 56 will follow the arm 15 keeping the
spring 69 compressed and the switch 56 in a
feeler member 5|. when motors 3| have moved
the crosshead members to their new position." 55 closed position. When the feeler member 5|
The details and operation of the automatic‘
stops swinging downwardly the arm 15 will move .
control system may be more easily explained
away from the switch ‘56 and the spring 69 will
by‘ referring to the schematic diagram shown‘
open the switch 56 stopping the motors 3| and
in Fig. 4. A source of alternating current 62 is '
the travel‘ of the crosshead members 22. The
provided to energize the motors 3| to‘ rotate the 60 rotation of the motors 3| and shafts |'| would
externally screw-threaded shafts I1 and posi
also be stopped by the crosshead member 22
tion the crosshead members '22. - A transformer
moving to open the limit switch 18. Similarly, '
63 energized from source 62 supplies a recti?er
if the diameter of the log being barked would
64 to provide direct current for energizing the.
be increasing or a log of larger diameter than
transmitter 60. The switches 56, 51 are shown
the log preceding it would pass beneath the feeler
connected to the shaft 52 by arms 65, 66. Each
member 5| the feeler member‘ would swing up
of the switches 56, 51 comprises a- pair- of ?xed
wardly and rotate the shaft 52 counterclockwise.
contacts-61 and a bridging contact 68 held- away
The counterclockwise rotation of the shaft 52
from the ?xed contacts 61 by a spring69. The
would then rotate the switches 56, 51 in a coun
bridging contact is mounted on a shaft ‘I0 that 70 terclockwise direction about the shaft 52 and
isslidably mounted within the switch and pro; »
switch 51 would close. The solenoid switch 16
jects from either side of the switch- The-‘receiver
would then close and the motors 3| would ro
6| includes pairs of stator ?eld coils ‘H , ‘|2 andv
tate the shafts I‘! to move the crosshead mem
a permanent magnet rotor-13. The rotor -‘_|-3 of
bers 22 toward thecouplings l3, to the right as
then-receiver 6| is connected by asha-ft 14 tops 75 shown in Fig. "lzzand Fig. 4, to'raisethe upper-=
limit of oscillation about the couplings 13. The‘
centri'cally‘ about - said externally ‘ screw threaded
transmitter 60 would then cause the receiver Bl
to rotate the arm 15 clockwise to allow the switch
51 to. open- as soon as the feeler member 51
member; reciprocating driving means connected"
to said internally screw threaded member to os
cillate said jet issuing means about a ?xed axis;
and means to rotate said externally screw thread‘
ed'member to move said internally screw thread
stopped its upward swing, indicating that a
length of the log of constant diameter was being
barked. The limit switch‘ 19 would prevent the ‘ ed member relative‘to said'?xed axis'about which
crosshead members 22 being moved too close to
said jet issuing means oscillates, to adjust the
the flexible‘ couplings I3.» An overload circuit
amplitude of oscillation of said jet issuing means.
breaker 82 may be provided to disconnectmotor' I0
4. A nozzle assembly for'hydraulic log barkers
31 from source 62 upon occurrence of excessive
comprising: ?uid supply means to deliver hy
currents in the motor circuit.
If the operating personnel should desire to
manually control the upper limit of the jet";
travel, the feelermember 5| could be removed
and the shaft 52 rotated manually by any‘means
draulic ?uid under pressure; ?exible ?uid trans
fermeans connected to said ?uid supply means;
jet issuing means attached to said ?exible ?uid
transfer means; an externally screw threaded‘
such ‘as a handwheel.
internally screw threaded member mounted con,
member connected to said jet issuing means; an
The automatic control
system could also be immobilized without remov
centrically aboutsaid externally screw threaded‘
member; reciprocating driving means connected
ing thefeeler member 5| by merely providing
switch means to interrupt the ?ow of current to
the: motors 3| from the source 62. The motors
- to said internally. screw threaded member to es
cillate said jetissuing means about a ?xed axis;
3| could then be energized from any other source
an electric motor mounted to rotate said ex‘
of current manually controlled in any manner
desired.
From the foregoing, it will be apparentito those
skilled in the art that the‘ illustrated embodi:
ment of the invention provides a new and im
ternally screw threaded member; and m'eanscon
trolling the energization of said electric motor to
- rotate said internally screw threaded member‘ and‘
move said internally'screw threaded member rel
ative to said ?xed axis about which said jet-is-'
proved hydraulic barking device ?exible in' the
suing means oscillates, to adjust the amplitude
operation thereof to the particular needs and de4
of oscillation of said jet issuing means.
sires of the operating personnel and, accordingly, 30' 5. A nozzle assembly for hydraulic log barking
accomplishes the objects of the invention. On
machines comprising: '?uid supply means to de-'v
the other hand, it will also be obvious to those
liver hydraulic ‘?uid underpressure; ?exible ‘?uid
skilled in the art that the illustrated embodiment
of the‘ invention may be variously changed and
transfer means connected to said‘ ?uid supply
means; jet issuing means attached to said ?ex
ible-?uid transfer means; an externally screw
threaded member connected to said jet issuing
modi?ed, or features thereof, singly or‘collec
tively, embodied in other combinations than here
in illustrated, without departing from the spirit
means; an internally threaded‘member mounted
of the invention, orsacri?cing all of the advan~
concentrically‘about said externally screw thread
tages thereof, and that accordingly the disclosure
ed member; reciprocating driving means con
herein is illustrative only, and the invention is not 40 nected to said internally screw threaded mem
limited thereto.
ber ‘to oscillate said jet issuing means about a
It is claimed and desired to secure by Let
?xed axis parallel to its‘ jet issuing axis; and
ters Patent:
means‘ to rotate said externally threaded member
1. A nozzle assembly for hydraulic log barkers,
and move said internally'threaded member rela
comprising: ?uid supply means to deliver hy
tive to. said ?xed axis about which said jet is
draulic ?uid under pressure; ?uid jet issuing
suing means oscillates, to adjust the amplitude of
means; means mounting said jet means for‘ose
cillation about a ?xed axis; means for supplying
said ?uid jet means from said ?uid supply means;
a lever arm connected to said mounting means;
means connected to said lever arm for oscillat
oscillation of said jet issuing means.
sure; conveying means for receiving and carry
ing a log through said machine; ?uid jet issuing
means; meansmounting said-jet means in spaced
ingsaid ?uid jet mounting means about said
?xed axis; and means for changing the effective
length of said lever arm to adjust the amplitude
relation about said conveying means for oscilla
tion about a ?xed axis; means for supplying said
?uid jet means from said ?uid supply means; a
lever arm connected to said mounting means;
means connected to said lever arm for oscillating
said fluid jet-mounting means about said ?xed
of oscillation of'said jet mounting means while I
said oscillating means is in‘ operation.
2. A nozzle assembly for hydraulic log barkers,
comprising: ?uid supply means to deliver hy»
draulic fluid under pressure; ?uid jet issuing
means; means mounting said jet ‘means for oscil
lation about a fixed axis parallel to its jet is
‘
6; A hydraulic lo'g barker comprising: ?uid sup
ply means to deliver hydraulic ?uid under pres
axis; and means having a log diameter sensitive
60 feeler element operablyconnected with said lever
suing axis; means for supplying said ?uid jet
means from said ?uid supply means; means for
arm and responsive to changes in log diameter
for "changing the effective length of said lever
arm in‘ proportion to the diameter changes sensed,
oscillatingsaid ?uid jet mounting means about
to‘ adjust the-amplitude of oscillation of said jet "
said ?xed axis; and means for changing theam 65 mounting means while said oscillating means is
plitudeof oscillation of said jet mounting means
in operation.
while said oscillating means is in operation.
7. Ina hydraulic log barking machine; convey
3. A nozzle assembly for hydraulic log barkers'
ing-means for receiving and carrying logs through
comprising: ?uid supply means to deliver hy~"
said machine; ?uid supply means mounted in
draulic ?uid under pressure; ?exible ?uid trans 70 spaced relation to said conveying means to de
fer means connected to said ?uid supply‘means;
liver hydraulic ?uid y-underpressure; a‘ conduit
jet issuing means attached to said ?exible ?uid
member attached‘ to said ?uid supplyv means to
transfer means; an externally screw‘ threaded
direct a barking jet of'hydraulic‘?uidi upon‘av
member connected to said jet issuing means; an
log» passing‘ through said machine'lonisaid con-v
internally screw'threaded memberlmounted ‘con-' 75
veying means pan externallylscrew‘threadedmem- >
2,686,727
,
niountedconcentric to said conduit member;
10
.
means and movable to contact the peripheral top
Ian internally; screw threaded member mounted
lcqncentric'ally "about said externally screw
threaded- member; reciprocating driving means
Qjconnected to said internally screw threaded mem
j
mounted in spaced relation to said conveying
surface of a log passing through said machine
on said conveying means; and means responsive
to the position of said feeler means to energize
said electric motor to rotate said externally screw
threaded member to move said internally screw
threaded member relative to said ?xed axis to
as
' ber to oscillate said conduit member about a ?xed
_.axis;} {and means to rotate said externally screw
; threaded member to thereby make adjustable the
adjust the amplitude of oscillation of the barking
jet; in accordance with the size of the log being
_-length of the lever arm between said internally
--,screw threaded member and the ?xed axis about 10
barked as determined by the position of said
‘which said conduit member oscillates.
feéler means.
" > 8, In a hydraulic log barking machine: convey
'
.
11. In a hydraulic log barking machine: con
means for receiving and carrying a log
_.»through ‘said machine; ?uid supply means 1;‘ veying
.mounted in spaced relation to‘ said conveying 15 through said machine; fluid supply means mount
ed in spaced relation to said conveying means to
-_-~means to deliver vhydraulic fluid under pressure;
deliver hydraulic ?uid under pressure; a conduit
'a conduit member attached to said'?uid supply
member attached to said ?uid supply means to
.-_means to direct a‘ barking jet of hydraulic ?uid
‘:upon a log passing through said machine on said 1; ~ direct a barkinghjet of hydraulic ?uid upon a
log passing through said machine on said convey
yconveying-means'; an externally screw threaded
ingl means; an externally screw threaded mem
.member mounted concentric to said conduit mem
ber mounted concentric to said conduit member;
ber; "an internally screw threaded member
an internally screw threaded member mounted
-mounted concentrically about said externally
concentrically about said externally screw thread
‘screw threaded member;":reciprocating driving
ed member; reciprocating driving means connect
means connected to said internally screw threaded
ed to said internally screw threaded member to
‘member to oscillate said conduit member about
oscillate said conduit member about a ?xed axis;
a ?xed axis; feeler means mounted'in spaced ‘re?
a teleoperated motor mounted to rotate said ex
.lation' to said con-veying means and movable to
.ing. means for receiving and carrying a log
contact the peripheral top surface of the log pass- .= '
ternally threaded member; a normally open
threaded member relative to said ?xed axis of ' ‘
machine on said conveying means; and energizing
ing through said‘ machine on said conveying 30 electrical circuit for energizing said motor; feeler
means mounted in spaced relation to said con
means; and'means responsive to the position of ‘
veying means and movable to contact the periph
said 'feeler ; means to rotate said externally
eral top surface of the log passing through said
threaded member to move the internally screw
oscillation and adjust the amplitude of oscilla
tion of the barking jet.
'
35 circuit completing means connected to said ieeler
means responsive to the position of said feeler
' '
means to energize said teleoperated 'motor'to
rotate said externally threaded member and move
said internally threaded member relative to said
?xed axis of oscillation to adjust the amplitude
of oscillation of the barking jet in accordance
1' ;- "9; "In a hydraulicf'log barking machine: convey
ing means for receiving‘ and carrying logs through
said machine; ?uid supply means mounted in
spaced relation to said conveying means to de
liver hydraulic ?uid under pressure; a conduit
. with the size of the log being barked as indicated
member attached to said fluid supply means to di
rect a barking jet of hydraulic ?uid upon a log
7 passing through v‘said machine on said conveying
means; an externally screw vthreaded member 45
by'the position of said feeler means.
12. In a hydraulic log barking machine: con
veying >means for receiving and carrying logs
through said machine; ?uid supply means mount
ed inspaced relation to said conveying means
to deliver hydraulic ?uid under pressure; ?exible
mountedconcentric to said conduit member; an
internally screw threaded member mounted con
centrically about said externally screw threaded
member; reciprocating driving means connected ‘' l ?uid transfer means connected to said ?uid sup
to said internally screw threaded member to os 50 ply means; jet issuing means attached to said
?exible ?uid transfer means to direct a barking
cillate said conduit member about a ?xed axis;
jet of the hydraulic ?uid upon a log passing
ani"_électric motor mounted to rotate said ex
ternally screw threaded member; and means con
through said machine upon said conveying
trolling the energization of said electric motor to '5' means; reciprocating driving means connected to
rotate said externally screw threaded member to
said jet issuing means~ to oscillate a portion of
move said internall'y'screw threaded member rela
said jet issuing means in a plane parallel to the
tive to s'aidj?xed axis to control the amplitude of
longitudinal axis ‘of the 'log' passing through said
oscillation of the barking jet.
machine upon said conveying means; feeler
means mounted in spaced’relation to said con
'
' 10. In a hydraulic log barking machine: con- ,
veying means for receiving and carrying a log to
through said machine; ?uid supply means
mounted in spaced relation to said conveying
means to deliver hydraulic fluid under pressure;
a I
a conduit member attached to said ?uid supply
means to directva barkingjet of hydraulic ?uid
upon a log passing through said machine ‘onsaid
conveying means; an externally screw threaded
member mounted concentric to said conduit mem
ber; _,_ an internally} screw threaded member
mounted concentrically about said externally
screw threaded‘ member; reciprocating driving
veying means movable to contact the peripheral
top surface of the log passing through said ma
chine upon ‘said, conveying means; and means‘
responsive to the position of said Ieeler means
65 to adjust said reciprocating means to limit the
amplitude through which the jet issuing means
oscillates.
,
.
vl3. In a hydraulic log. barking machine: con
' veying means for receiving and carrying a log
through said machine; fluid supply means mount
ed in spaced relation to said conveying means to
deliver; hydraulic ?uid under pressure; a conduit
member attached to said ?uid supply means to,
means connected to said internally screw threaded 1'
member
?xed axis;
to oscillate
an electric
saidmotor
conduit
mounted
membertoabout
rotate 1' direct a barking jet of hydraulic ?uid upon a
said externally‘ threaded member; téeler means is log passing through said machine on said- con
11
2,586,727
12
veying means; an externally screw threaded
member mounted concentric to said conduit mem
ber; an internally screw threaded member mount
ed concentrically about said externally screw
member to oscillate said jet issuing means about
saidturning axis of said'?exible' coupling; ‘and
means to rotate said externally‘threadedmember
and‘move said internally threaded member‘rela
threaded member; reciprocating driving means
tive to said turning axis ‘of said‘ ?exible coupling,
vconnected to said internally screw threaded mem
to adjust the amplitude of oscillation of said jet
ber to oscillate said conduit member about a
issuing means.
?xed axis; a teleoperated motor mounted to ‘1'0
16. In a hydraulic log barking‘machine: con
tate said externally threaded member and move
veying means for receiving and carrying ‘logs
said internally threaded member relative to said 10 through ‘said machine; ?uid supply means
?xed axis of oscillation to adjust the amplitude
mounted in ‘spaced relation to said conveying
of oscillation of the barking jet; a normally
means to deliver hydraulic ?uid under pressure;
open electrical circuit for energizing said motor;
a ?exible ?uid coupling attached to ‘said '?uid
‘feeler means‘mounted in spaced'relation ‘to ‘said
supply means with the turning axis of ‘said cou
conveying means and movable to contact the 15 pling being ?xed in a plane perpendicular to-the
peripheral top surface of the log passing'through
longitudinal axis of a ‘log passing through ‘said
said machine on said conveying means; energiz
machine upon said conveying-means; jet issuing
ing circuit completing means connected to said
means attached to'said ?exiblev'coupling to‘direc't
feeler means to close said energizing ‘circuit upon
a barking jet of hydraulic ‘?uid upon'the‘log as
movement of said feeler means; and follow up 20 it passes through said machine, theiissuing :axis
means responsive to the rotation of said motor
of said jetv means ‘being parallel vto ‘said turning
to keep said circuit completingmeans closed only
axis; an externally screw threadedi‘member con
as long as said feeler member continues to move.
nected to the movable portion of‘said ?exible
14. In a hydraulic log barking machine; con
coupling; an internally screw threaded member
veying means for receiving and carrying a log 25 mounted concentrically about said ‘externally
through said machine; ?uid supplymeans mount
screw threaded member; reciprocating driving
ed in spaced relation to said conveying means to
means connected .to said internally threaded
deliver ‘hydraulic ?uid under pressure; a conduit
member attached to said fluid supply means to
member-to oscillate said‘jet'issuing means about '
said turning axis of ‘said ?exible coupling; a
direct a barking jet of hydraulic ?uid‘upona log 30 teleoperated motor mounted to rotate said ‘ex
passing ‘through said machine on said conveying
ternally threaded member; a normally open elec
means; an externally screw threaded member
trical circuit for energizing said ‘motor; ‘feeler
mounted concentric to said conduit member; an
internally screw threaded member mounted‘ con~
means-mounted in spaced relation to :said con
cillate said conduit member about 'a ?xed axis;
a teleoperated motor mounted to rotate'said 'ex
means-responsive to ‘the position or; said‘ feeler
means to energize said teleoperated motor'to ‘ro
veyingmeans and movable to contact‘ the periph
centrically about said externally screw threaded 35 eral surface of the log passing‘through .saidma
member; reciprocating drivingmeans connected
chine on said conveying means; and energizing
to said internally screw threaded member ‘to '05
circuit completing means connectedtto 'sald‘fee'ler
ternally threaded member and move said inter
nally threaded member relative to said ?xed axis
of oscillation to adjust the amplitude of ‘oscilla
tlon of the barking jet; a normally open ‘electrical
circuit for energizing said motor; feeler means
mounted in spaced relation to said vconveying
means and movable to contact the peripheral top
surface of the log passing through said machine
tate said externally threaded‘member endmove
said internally threaded member relative to said
turning axis of said ?exible coupling to adjust
the amplitude of oscillation of the barking jet
to correspond to the diameter of the‘ log being
barked as indicated by the position ofsaid- feeler
means.
17. In a hydraulic log barking machine: con
veying means for receiving and carrying logs
on said conveying means: energizing circuit com
through said machine; a ?exible ?uid coupling
pleting means connected to said feeler means to
close said energizing circuit ucon movement of 50 mounted on each side of said conveyingv means
with the turning axis thereof in a planev per
said feeler means; a transmitter operated by‘said
pendicular to the longitudinal‘ axis of a log pass~
motor; a receiver connected to said circuit com
pleting means and energized by‘said transmitter
to ‘keep said circuit completing means closed ‘only
ing through said machine upon said, conveying
means; ?uid supply means connected to each of
as long as said feeler member continues to ‘move. 55 said ?exible couplings; jet issuing means attached
to each of said ?exible couplings to-direct shark
15. In a hydraulic ‘log barking machine‘: con
ing jet of hydraulic vfluid upon-a 10g asit-passes
veying means for receiving and carrying logs
through said machine upon said conveyingmeans,
through said machine; ?uid supply means
the issuing axis 01' said jet means being parallel
mounted in spaced relation to said conveying
means to deliver hydraulic ?uid under pressure: 60 to said turning axis; an externallyscrew threaded
member connected to the movable portion of
a ?exible ?uid coupling attached to said ?uid
each of said couplings; an internally screw
supplymeans with the turning axis of said cou
threaded member mounted concentrically about
pling being ?xed in a plane perpendicular to the
each of said externally screw threaded members;
longitudinal axis of a log,r passing through said
machine upon said conveying means; jet issuing 65 reciprocating driving means connected to each
of said internally screw threaded members to
means attached to said ?exible coupling to direct
oscillate each of said jet issuing means about
a barking jet of hydraulic ?uid upon the log
the turning axis of their respective couplings;
as it passes through said. machine, ‘the issuing
a teleoperated motor mounted to rotate each of
axis of said jet means being parallel to said turn
ing axis; an externally screw threaded memberv 70 said externally threaded members; a normally
open electrical circuit for energizing said motors;
connected to the movable portion of said ?exible
a feeler member swingably mounted‘ above said
coupling; an internally screw threaded member
conveying means to ride upon the top surface of
mounted concentrically about said internally
a log passing ‘through said machine upon said
screw‘ threaded member; reciprocating driving
means connected to said internally threaded 7 conveying means; and energizing circuit com
pleting means mechanically connected ‘to said
13
2,586,727
feeler member responsive to the position of said
feeler member to energize said teleoperated
motors to rotate said externally threaded mem
bers and move said internally threaded members
relative to the turning axis of said ?exible cou 5
plings to adjust the amplitude of oscillation of
the barking jets to correspond to the diameter
of the log being barked as indicated by the posi
14
UNITED STATES PATENTS
Number
1,657,990
1,696,385
1,928,621
2,413,341
2,473,461
2,501,848
tion of said feeler member riding on the top
2,502,763
of the 108.
16 2,508,594
ERNEST C. SHAW.
REFERENCES CITED
‘ The following references are of record in‘ the
?le of this patent:
Name
mite
Blouin __________ __ Jan. 31, 1928
Coles ____________ __ Dec. 25, 1928
Frede et a1. ______ __ Oct. 3, 1933
Swift __________ __ Dec. 31,
White ____________ __ June 14,
Johnson __________ __ Mar. 28,
Swift ____________ __ Apr. 4,
1946
1949
1950
1950
Bukowsky ________ __ May 23, 1950
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