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Патент USA US2404180

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-July 16, 1946.
,1_ w, KING ErAL
Filed May 11, 1945
5 Sheets-Sheet 1
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July 16, 1946.
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J. w. KING Erm.
Filed May ll., '1945
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. J. W. KING
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July 16, 1946.
' J, vw.' KING ETAL
l 2,404,180
Filed May ,11, 1945
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July 15,1946»
J. w'° KING Erm.
Filed May V11'l 1945
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July 16, 1946.
‘ 2,404,180
Filed May l1., 1943
5 Sheets-Sheet 5
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Patented July 16,f 1946
2,404,180Y _
John W. Kingnlûak Park, and GeorgeStuhlfauth,
Chicago,' Ill., assignors to >Western Electric
Company, Incorporated, New York, N. Y., al. "
corporation of New York
Appliéation Mayu, 1943, serial No.' '486.580
’s claims. (c1. zei-3:5)V
This invention relates to burr removing appa
ratus and more particularly to an apparatus _for
Fig. 4 is a planview ofthe 4apparatus shown
in Fig. l, parts being broken away to conserve
removing the burrs resulting from broaching sur
space and showing diagrammatically the actuat
faces of an article.
ing mechanisms for the clamps which hold the
In the manufacture of some articles, itis de Ul frame during the removalof the burrs therefrom;
sired to form cooperating surfaces thereof to con
Figs.,5, Gand 7 arefragmentary detail views of
form very accurately to a desired contour and,
the cutting knives for removing the burrs from
accordingly, 'these -surfaces are formed by broach
the side edges of portions of the .frame shown in
ing operations. When broaching is performed, it ' Fig.v 1, Fig. 5 being a side elevational view of the
quite frequently happens that burrs are thrown
knife and Figs. 6 and 7 comprising sectional views
up by the broaching tool, which must be removed
takenalong the lines 6„-6 and 1-_1 Íof Fig. 5 in
either by hand or by some machine designed for
this purpose.
the direction of the arrows; i _
Figs. f8 and 9 are vertical sectional’views on an
enlarged scale taken substantially along therlines
It is an object of the ~present invention to pro
vide a simple and inexpensive apparatus for re
-moving burrs from articles.
8-8 ,andafà of Fig.„4 inthe direction of the ar
rows and> showingdetails of the clamping mech
. v
anismand the> drivingmeansfor the files;
In accordance with one embodiment of the in
vention as applied to a telephone switching frame
assembly which has had three of its surfaces sur
face-broached, mechanism is provided for simul
taneously initiating the operation of clamping de
vices to clamp the frame in position and‘to initi
ate the operation of removing broaching burrs
from edges vof each of the three surfaces, In the
particular embodiment vof the invention chosen 25
operating cutting knives Aand files.
The files
which remove the burr from the end edges of the
surfaces which have been broached are driven
the arroWS;
Y ',Fig. 11 isa fragmentary front elevational Viewv
of the clamping mechanism for holding a frame
in positionVV in the apparatus and taken substan
tially along the line I I-.-IN I>` of either Fig. 8 or. Fig.
10;Fig. 12. is a'plan sectional
j., .
N.. taken
for illustration, the two side edges and an end
edge of a surface, which has been formed to the
desired dimension by a broaching operation, has
the broaching burrs removed therefrom by co
Fig__10 is a Vplan sectionjtaken, substantially
along the line _lO-V-ID of Fig. 8 in the direction o
tially along >theline V|2---|`2 ofY Fig. 8 in the direc
tion of the arrows showing .details of thedrive
mechanism for- theknives .and theiiles; and `
Fig. 13 is a vertical sectional view taken sub
stantially along the line |3-I3 ofV Fig. 8 in the
directionof the arrows.l Y
through a substantîallycircular path-to finish
the end edge to a high degreeof accuracy, where
. Referringto the drawings, wherein like ref
broached surfaces simultaneously.
switch Vertical unit base assembly is shown .at
erence characters Vdesignate Ythe same parts
as the two opposed knives are driven in a straight 3 Ul throughout the several'views,particular reference
line tocut the two side edges of two of three
being- had- to Fig. 1 wherein a telephone crossbar
A better understanding of the invention may
be had by reference to the following detailedde
I9, it will be seen that the base assembly com
prises a mainframe member 20 having an arma
scription when considered in conjunction with 40 ture .Supporting leg A2l* formed. integrally there
the accompanying drawings, wherein
with. The 'main frame‘member 20 has an `in
F‘ig- 1 is a View in perspective of a telephone
verted U-shaped member 422> suitablyïattached
thereto,y for ',example, by welding, „and -this
crossbar switch vertical unit frame having three
armature supporting legs which have been formed
U-shaped member has depending leg portions 23
in a broaching operation,> which legs are to be 45. and 24. `The leg24 cooperates with theleg »2l to
trimmed by means of >the apparatus embodying ' form the armature support of theswitch and the
leg 2|,V leg 24 fand leg 23 arev all cut- accurately
the present invention;
by a broaching _operation tor have their lower
Fig. 2 is a side elevational View, partly broken
away, of an apparatus for broachingthe surfaces
surfaces in the same plane. This results in throw
of the frame shown in Fig. 1 and showing some 50 ingl up a burr valong the >two‘side edges and one
end edge of the legs 23 and 24 `and also results
details of the mechanisms for driving the cutting
in throwing up a burr at the front edge of the leg
Fig. 3 is a detail view of one of the cutting
12|, as_viewed in Figgl. Since the legs 2|1`and 24
knives showing diagrammatically the path of
serve as_pivot’points for the `armaturejoi’ the
travelthereof in performing its operation; . .
switch andthe pivotrocks onnthe front' edge of
2,404,180 '
of clamping position when the> lever 52 is rocked
the legs, as shown in Fig. 1,'it is necessary to re
move these burrs from the legs 2| and 24. Since
the leg 23 is formed in the same plane as the bot
tom surfaces of the legs 2| and 24, the leg 23 must
clockwise, as shown in Fig. 8, due to the cam roller
' 62 mounted on the lever r52 engaging the high
portion of the cam surface 63 on the lever 5e. _
Y also have the burrs removed from it.
The apparatus _ifor removing- the burrs from
Y the legsof. the switch frame assembly‘lß ismount-V '
ed upon a suitable base 25 and includes a Ydriving
When a frame assembly l9'is to be operated
upon, it may'beplaced; as shown rnost clearly
in Figs. l0 and-11, withthe lower edgerof the
main frame member 2U resting on a support block
shaft V25 continuously driven bya motor 21 (Fig`- ¿jj Q15, whichvhas a cut-out 16 formed in it for re
4),. The shaft 25 has a sprocket> 'M_rnounted`Yr _Iceiving a depending portion of the main frame
thereon'f-or drivingY achain 29, which, in turn,` Y lwork 20. The leftend (Figs. 10J 11 and 13) will
engages a sprocket 55 of a single revolution-clutch f » be- supported upon a support block 11; which fits ’
SI vof any suitable type, which may~bej?enderedÍ . finto/the „Ulshaped member 22. The lever 674Y will
operative to drive ashaft32 throughya single 1_.. clarnpjthe-legjâ, of the U-shaped member 22
revolution ¿each Vtime al controlling handle 33 ¿is against thesi'de',V of the support Yblock 'l1V and the
.Y depressed', ’ The details of construction., of: theY ._ Vclamping,pins 51 and 5,3 «will clamp?thejmain
-frame'member 2ï!V against the front face> of the
single V`revolution clutch 3 I, Ynot forming" an" es:
sential portion of the’pre'sent invention; haveîlï. support „block 11» andan upwardlyY extending
frame member 18 formed integrally with the sup
' ' that any _suitable single revolution-clutch operable V2d Y port block_15. The support block 11 is îalso pro
vided withan upwardly' „extending frame' mem
as ¿ described >may bel used in the apparatus. In
ber§19,l against 'the front surface Vof which the
additîonto driving the shaft-32 through one cycle
U-shaped member 22 will bear. The two frame
of> rotation, the single revolution clutch 3l, when
l .I . not been shown in detail and it will be understood I
rendered operative by manipulating the handle
members 18 _and 19 are attached to legs 8l! and
33, also drives a cam A3.4 through a single revolue
tion- to operate -a switch 35 for supplying power
to'éner'gize either a coil 361er a coil 31 forming. a
bracket‘82; which is, in turn, mounted upon `an
8|, respectively, of kaA substantiallyl U-shaped
upwardly extending portion 8.3 of theV 'standard
55. Injaddition' to being supported by Ythe U
part ofA a solenoid operated switchhavinga shift
shaped memberA 82, at their upper ends, theV sup'
ablefcore „38 which will be attracted by either the
core Segorßl, depending upon which of the coils t. port blocks 1,5 and11 rest upon and arefixed
to the portion ofthe standard 55 in'which the
has battery connectedito it:through1.the switch
rocker shaft 53 is journalled, as may be seen
55. The core 38, in its movement, will operate
particularly by reference to Figs. 8 and 9. In
an actuating lever Y39 >of Ia valveflü. The switch
35, whenthe apparatusis in its normal inopera- _ yaddition to the clampingjmechanisms just de
tive'position, normallysupplies current tothe . scribed, the lever 52 is providedwith a rearward
coil 31 and. fluidlunder pressure will be directed
Vfrom afsòurce Knot Shown) through' a -pipe 4l,
through the passages in the valve, to the fr_on-t
end of a cylinder 42.
However, assoon as the
ly extending _clamping projection 84, which, when
the lever is moved to its operative position, as
shown in Fig. 8, will engage theupper surface of'
the` U-shapedmember 22 to clamp it tightly in
clutch..3| becomes operative due to theoperation 40 place-’on the upper surface'of the support block
>1p1, thus torhold the frame kassembly Yl ä during the
of the handle V31%,.the switch 35. will disconnect
power fromithe. 'coil r31 and connect power to Y
operate the‘coil' 35,:thereby movingsthevalve ¿l5
to the‘opposite positionto that shownto direct
the fluid underV pressure from the’V pipe Mfto the
i Y ¿A'pistonlnot shown.)` in the cylinder '42 serves
to drive a piston rod 150, which hasI pivotally con
succeeding operations'thereon.
l Y'
4'By _means ofV the clamping mechanism just de
scribed, «aA ßswitch 'frame assemblyV I9 -’to haver the
burrs removedzfrom it may be clamped in posi?
tion'tobe worked upon by _files 90, HandÍ 92 and
cuttingknife assemblies >93 andällf. The shaft _
Shin _its cycle of rotation, will operate' theA files
SU, _Sl .and 9.2 Vand thej cutting knife assemblies
nected to italink15l for driving a lever 52. The
lever 52 is attached to a rocker shaft 53, bymeans 50 $3 _andiâmd in a> ñxed- sequence starting Y from Athe
Vnorrn ’ inoperative; position of the apparatus as
of -a set screw 54, and serves to rock the sli-aft 53
_each r.time the link 5l is actuated.î The shaft 53 ' shown' „in Fig. 2_.1 _The first/operation performedA
is journalled in an irregularlyshaped standard
55 >and carries alever 'éëatits right end, as seen
most> clearly in Figs. 11 and 12. _At their upperV .
ends, the levers 52 and 55 carry clamping> pins
51 and 58, which’are VslidableV in vshouldered'aper
tures_.59fand 55 (Figs.„8 Vand 9) [and are urged
»_ _ towardîthe frame Vassemblyfl@ »to clamp it when
on the frame >E e isßeffe‘ctedï byv the cutting knives,
_as _shown most clearly` in Figs. 5, V6 and 7, where
theputtingiknife assemblyiää'isshown, _In this
assembly, a' pairmof, irregularly Yshaped knife
blades> 55 ¿and> ßßarefrnounted’upon a block 91.
The_blockßl, asishownjjn‘iost clearly in_Fig. 11,
i laV depen‘dir'ifgi'portionu 98 riveted
into a 'short'.rockshaft Selby means >of rivets Ill!)
thefshaftl5`3 isrockedlcounter-clockwise, as viewed . en
in_Fig. 8 orfclockwise, as_viewedinlî‘ig. 9, Vas will / »
the block> 91, may roclfgftoA a-jlimitedextent in a
_begdescribeïdr more in detail hereinafter. The
` -lever?5l¿¿hasfïaljstud'shaft 5I .ñxed init which _ slot' VUlli formfedin a siiloportY block _102,'which
`carries afreely rotatable cam roller 62 (Figs.` 8 » l serves'as a bearing .for supporting the rock shaft f ,
Vand-¿13) .i Y The cam roller VV62V engages a cam sur; 65 _9S_._.«The"cutting _knife assemblyjSAis similar in _
`face 63 formedV onalever 64,-_which is,~in turn»,
mounted upon-»a pivot. stud 65 attached Vto "an
extending portion 66 of >thestandard»55.,"I1`he _
lerici-_63 is normally urged torock counter-clock- . -
wiselFigs. 1‘1 and 13) by a compression spring F51.V
seated _in Íafrvoclsetlìß (Fig.- 13) infvthe'standard
55.? Inf 'other words, ‘the `lever' v E53Y is normally
urged to‘rock toîthe'left to clamp againstthe leg
'construction to theassembly k9,3,being supported
on Va rock shaft I 03 and carrying back plates |04
andíl55~gf1‘he ~assemblies `93 and 94 are thus per-Y
mitt'edto rock a shortdistance withrrespect to
the„_support block 122m vorder ,that theymay
properly alignr themselvesV with' the legs _Ztand
„23,- respectively,yof the YU-shaped1V member 22;.on
ïtheframefassernbly ISLY Theknife blade _9_6 is
„of the iframe assembly I9 and hold it in- posi'- fr' Vprovided Swith. ‘a _ sharpened edge ILUG., _ which _is
tion to »be worked upon, but will be cammed out 75 positioned tomthe'rlght (Figs. 5 arid '7) V(lf-.afgllide f
2,404, 180 _
projection |01. Similarly, the knife blade 951s
provided with a sharpened'edge |08 lpositioned
to the right of a guide projection |09. In the
|23, the lever ||| will travel in a straight line,
and will guide the knife blades 95 and 96 into
vengagement with the burrs formed in thel pre
as indicated by the course of the knife blade 96
in Fig. 3 at the line |35. However, as soon as _the
camming pin |31, in its circular ‘path of travel, v
has passed beyond a horizontal position a short
distance and after the cutting knife assemblies>
93 and 94'have moved across the legs 23 and 24
vious broaching operation. Since the blades 95
of the frame assembly I9, the camming pin V|31
operation of the apparatus, the guide edges l|01
and |09 will engage opposite sides of the leg-24 '
and 96 may not be moved with respectI to each
will engage the bottom edge of the cam slot V|3|;
other, but move as a unit, the guide projections 10 and >thelever || | and housing |2| will bevrocked
|01 and |09 will guide the knife blades 95 and
clockwise about the pivot mounting for the hous
96 into engagement with the edges of the leg 24
ing |2| and -the 'cutting knife assemblies 93 and
94 will then follow the path designated |40 (Fig.
left to right, as viewed in Fig. 5.V TheV two knife
3) for-the knife blade 96. When the lever |||
blades 95 and 96 are held on the block 91 by means
is thus moved through the circular path, as indi
of a machine screw Y| I 0 and the supporting block
cated by the line |40, the forward end thereof will
|02`is fixed on the right end (Fig. 2) of a recipro
strike the left Side (Fig. 2) of the lever |30 to
. cable lever I I |. The rock shafts 99 and |03 are
rock it about its >pivot pin |3| in a clockwise dì-`
held in place in theblock |02 by backing plates
rection untilthe spring |21 forces the lower sur
||2 and I I3 (Figs. 2 and 11) suitably attached
face of the cam slot tightly against the camming
to the block |02 which is, in turn, fixed to the 20 pin |31 toward the end of its travel back‘to the
leverv I || by means of a pair of machine screws
position shown in Fig. 2, at which time the lever
|30 will slip 01T the right end of the lever | || and
The reciprocable lever ||| is slidable in an os
return to the position shown.
. '
cillatable housing |2|, which is pivoted on an
The shaft 32, as seen most clearly in Fig. 12,
upright |22-||22, in turn mounted- upon the base
is journalled in a bearing |45 forming a part of
25. The upward movement of the oscillatable
the standard 55and, in addition to the lever |38
housing |2| is limited by an abutment screw |23
mounted at its left end (Fig. 12), has a lever |46
threaded into a cross head |24 extending to the
mounted at its right end. Each of the levers
right (Fig. 4) of a standard |25, which is, in turn,
|38.and |46 is forked, as shown at |41 and |48,
suitably mounted on the lbase 25. The under 30 respectively, for receiving levers |49 and |50,
surface of the oscillatable housing |2| hasa stud
which .are pivoted on the levers |38 >and |46 by
|26 set into it for retaining compression spring
means of pins |5| and I 52. The levers |49 and
|21 in lposition to bear against the underside of
|50 are urged to rock with respect to the levers
the housing and'urge the housing upwardly. A
35 |38 and |46 in a direction toward the shaft 32
guide stud |26 extending from the base of the
by springs |53 and |54, which are attached to
standard |25 serves to position the bottom end
the levers |49rand |50 `intermediate their ends
of the compression spring |21 and also cooperates
and are attached to brackets |55 and |56, re~
with the stud |26 and abutment to prevent the
spectively, which are, in turn, mounted by means
housing |2| from oscillating beyond a predeter 40 of machine screws |51-¢|51 on flattened surfaces
mined point. Extending upwardly from‘the base
of the levers |38 and |46. At their free ends..
plate 25 is a bifurcated guide standard |29, which
the levers |49 and |50 have stud shafts |58 and
engages the two side edges of the lever„||| to
|59, respectively, mounted in them, which carry
guide the front end thereof. An L-shaped lever
Vcam rollers |60 and |6I, respectively, in engage
|30, pivotally mounted on a pin |3|, which is,
ment with stationary cams | 62 and |63 fixed to '
in turn, mounted on a bracket |32, is normally
oppositev ends of the bearing portion |45 of the
urged to the position shown in Fig. 2` by a con
standard 55. In addition to rotatably support
tractile spring |33 attached to the lever |30 and
ing the cam roller |60, the stud shaft I 58 ro
to the guide standard |29. The amount of move
tatably supports a pair of levers |64 and |65,
ment of the lever |30 in a-counter-clockwise di
which are urged to rotate counter-clockwise on
rection about its pivot pin |3| is limited by an
the stud shaft |58 (Fig. 8) by contractile springs
abutment screw |34, which strikes the base 25.
|66 and |61 attached thereto and to the lever
as the cutting knife assembly 93 is moved from I
The upper end of the lever |30 lserves as a cam
ming 'surface for engaging the undersurface of
the lever |||, as seen most clearly in Fig, 2L, to
prevent the lever ||| from moving downwardly
during a cutting operation of the knife blades
|49. Similarly, the stud shaft |59 pivotally sup~ .
ports a lever |68, which is urged to rotate clock
wise with respect to the shaft |59 (Fig. 9) by a
contractile spring |69. The levers |64, |65 and „
|68 are all of exactly the same construction and
are each'provided with a projecting portion |10,
v95 and 96 when the lever ||| is moved to the
left, whereby the cutting knife assemblies 93 and
to which their respective springs are attached,
94`wi11 trave1 in a straight une, as indicated by 60 and which Vengage pins |1| on their respective
the line |35 (Fig. 3). The lever | |.|‘is provided
levers |49 and |50 to prevent movementk of the
with a cam slot |36 (Fig. 3) for receiving a cam
levers |64, |65 and |61 .beyond the position shown
ming pin |31, which moves through a circular
in Figs. 8 and 9. Each of the levers |64, |65 and
path to actuate the lever |||. As seen in Fig. 2,
|68 have a notch |14 formed in them at their
free ends, as shown in Fig. 9, ’for 1‘eceiving¿the
the camming pin |31 rotates counter-clockwise,
being mounted upon a primary lever |38, which
files 90, 9| and 92, which are clamped in place
is, in turn, iixed to the shaft 32 by means of a
in the notch |14 by a clamping plug |16 attached
set screw |39. The primary lever |38 being driven
to each of the levers adjacent their hubs. ~ Y
by the shaft 32 will carry the camming pin» |31
The cams |62 and |63, as will'be apparent from
through a circular path'. In the» first portion of 70 Figs. 8 and 9, areof similar construction; the
its travel from _the position shown _in Fig. 2- in a
cam |63 being ’slightly larger than cam |62 since
its associated cam roller |6| must direct the file
counter-clockwise direction, the pin |31 will en
92 through a slightly different path than that
gage the left >side of the cam slot |36 to slide the
lever ||| to the left. „ Since the spring-|21 holds
through .which the cam roller |60 guides the iiles
the housing |2| up against the abutments'crew 75
' 2,4044 so
pinV |31' ceasespto eífect' a downward thruston
Vthe lever ||_|, 'atavhich time the spring |21`will
start gto push the-'lever backup to the position '
`Á better understandingy of the invention will -be
had ‘by4 reference to the following brief descrip
tion of the mode of operation thereoil` A cross-v
bar switch framea'ssembly i9, which is to have
shownin Fig. 2.'
Duringßthe second half cycle ofthe shaft 32,
the 'filing portion ofjthe apparatus will become
effective to‘file the breaching` burrs off the legsV
2l, 23"and~2ä', at YWhich=ti1r1e .the files 99, 9| and "
92 will, start from theV position'shown in Figs. 8
upper surfaceof the block 'l1l and where the lower lÜ and
9, which'is the vposition they occupy in ap
edge of the frame 201wil1`engage the 'upper sur,
proximately the last quarter of cycle of rotation
face of the support rblock 15." The assembly.V i9
of the shaft 32. The fileswill be urged to retain
'may' be placed inthis position with the rear ledge
the angular position »shownrin' Figs. Sand 9 as
its legs 23,7724 and 2| treated to remove- the.
broa’ching'burrs from them, may be placed in the
Yapparatus by dropping it into position Whereïthe
base/'of the U-shaped frame 22 will engage the
Vofit engaging the face of the -fr'ameírnembers Y
they travel upwardlyybutiof course,.theywill be
18 and 19 or may be dropped into `position where
rocked about the stud'shafts |58 and |59 due to
their engagement With.V the legs 2| ,` 23 and 24,
the frame 20 `will rest against theclampmgpms .
51 and 58 and the handle 33 maythen be manip»
Y and >they;willfthus „very >"slightly round olf the
ulated to cause the single revolution _clutch 3| to
corners ofthe leg'sj’and remove>v any burrs which
might have been.v formed thereon. As soon as
interconnect the shaft s2 Ywith theß seance. As
Y ’the
be operated
shaft 32 tostarts
to current'to
rotate, thethe
coil 35
36, at- s theistud shafts|58 and |59 beingguided'by their ,
tracting thefsolenoid coil V38k and reversing
valve 40 from the fposition- shown.
of the camsreach
|62> and'|63,
the top l
WhenY the
they will start to move away from the frame
Y valve 46 is reversed, fluid under pressure will be
assemblyV I9 clamped in the apparatus andas
the shaft 32 completes its cycle of operation, will
assume the angular'positicn shown in Fig. 2.
`directed through the pipe lll through the valve
E0 to the upper or rear end (FlgA) of theeylin
der 42.Í When ñuid under pressureis supplied to
What is claimed is:
- the rear end of the cylinder 42, the pistonA rod
l. `A burr removing apparatus comprising a
clamping means for holding an article, a knife
5B will be moved downwardly,_as viewed in Fig.
4, or to the right, as viewed 1n Figs. 2 and 8,
53 .
therebyfto rock the lever 52 and .rock` shaft
for cutting burrs from one Vporti'onof the article,
a `íil'e for filing burrs from another portion of the
article, a cam and vcrank shaft rotatable through
a single cycle to cause operation of the clamping
counter-clockwise. As the lever 52 rocks coun
ter-clockwise, the lever> 55 will rock clockwise,
shown inrFig». 9, and the clamping pinsv51 and
means, the knife and the file, means on the cam
581will thereupon clamp the frame assembly i9
and crank shaft for imparting movement to the
knife, and meansïcooperating with the means onk
against the front surfaces of the frame members
18 and 1Q. When the lever V52'reaches the end'Y
of its travel to clamping position, the clamping
the cam andicrank shaft to guide >the knife inra
rectilinear path Vandin an arcuate path.
projection 84 will Vengage the'upper _surface Vof
the U-shaped member 22 to clamp it against the
V2. A burr f removingV apparatus comprising a
upper surface of the support blockrl'lV and while 40 clamping means' forV holding an‘article, a knife
for cutting burrs from lone portionrof therarticle,
the lever 52 is moving to the position 'shown inl
aille forïiiling'burrs from> another portion ofl
FigLS, the cam roller 62 will roll downY the face
the article, a-_ ca_m and Vcrank shaft rotatable
of 'the cam surfaceY 63 on clamping lever '55,
1 through a single cycle to Ycause operation of the
thereby shifting theY frame assembly |29 vto a
clamping means, the -knife and `the rile, means
proper position Ywhere the inner surface of theV .
on the cam and crank shaft foi/carryingV thefiles
through a rotary path, and a >stationary cam sur
rounding theshaft‘for guiding the file. ’
leg 23 will bearagainst the right hand side (Fig. i
13) of the support block‘ll just prior to theV final
clamping ofthe assembly I9 by the clamping '
_3. A ?burr `removing apparatus> comprising a
projection 8è. This operation of clamping the
assembly in position to be worked upon willY oc
clampingr _means for'holding an article, a knife
cur in the very first portion of the cycle of rota
tion of the shaft 32 and as soonas the'part is
Va fìle‘for'filingy burrs‘from another portion of
clamped in place, the cuttingV knife assembles
the article, a ?cam andv crank Vshaft rotatable
for cutting burrs from one portion of the article,
93 and 94 will become effective due to the move
through asingle cycle to cause operation of the
ment of the reciprocable lever | || to the leftiun-Y 55 clamping means,rthe knife and the file, means
der the action of the camming pin |31.Y nAs de
on the cam and crank shaft for carrying the ñles
scribed hereinbefore, the cutting knifevassem'
blies 93 and 94 will folloWïthe path indicated’by
curved and straight lines 'lá? Vand 4§35 1(Eig: :3) te,
in the first half cycle of the shaft 32, cutoff any
burrs formed along the side edges of theílegs
23 and 24.' In performing this operation, the
lever ||| will be prevented from tilting clownA
wardly due to the engagement of the undersur-
through__ a rotaryv path, a stationary cam sur
rounding'the shaft for guiding the ñle, and means
tending to hold thefñle at a predetermined angle
to the
- '
`4. KVAY burr removing apparatus comprising a
~ - clampingfme’ans for holding an article, a knife f Y
faceïthereofV withY the .top surface of the lever
t 13B' and, therefore,- the Y leverVV I| | will travelY
straight toward the rear of the machine yinY a sub-`
V stantially horizontal path; As soon as the cut
ting 'knife assemblies have clearedV the legs 2l,
for cutting burrs from one portion of the article,
a ñlefor filing burrs from another portion of the
article,a camand crank shaft rotatable through "
Y a single?cycle to` cause operation> of the clamping Y
means, the knife andthe ñlaand meansA mounted
on thercarn and crank shaft >for resiliently sup,-` ‘ `
23 and 24, the lever |.I Land the knife Vassemblies 70 porting the 4file with respect to thejcain and crank ¿ f
willltravel through an arc,- as indicated bythe
*Y Yline |40, the Ílower right »end (Fig. 2) 'of thel'ev’er
'Y Y| | |Y` having passed ofï'theupper surface lofithe
¿5. VA -burr Y -remoti/‘ing yapparatus comprising vaV
clampingrmeansffor Aholdingv an article, ~ a knife
lever ' I 30, will lthenY engage' the lever ' |36 'and rock -
foncutting burrs ffrom‘one portion ofthe article, -
it clockwise about the'pin |3| until Vthe Ycarnrm'ng
av'vïijleïfor ñling'burrs from ¿another portion of the '
2,404,180 ’
article, a cam and crank shaft rotatable through
a single cycle to cause operation of the clamping
means, the knife and the ñle, means mounted on
the cam shaft for resiliently supporting the file
with respect to the shaft, and a cam encircling
the cam shaft for deñecting the knife eccen
ing means carried by said lever, camming sur
faces formed on said lever for `engagexfnent by
the pin, and means for guiding said lever in a
straight line during part of the movement of the
camming pin, said means being movable by the \
lever during another part of the movement of
trically of the shaft.
the pin to guide the lever during its movement
6. In a burr removing apparatus, a camming
in a semi-circular path.
pin movable in a circular path,r a slidable and
8. In a burr removing apparatus, ~a cammlng
oscillatable lever driven by said pin, burr remov 10 pin movable through a circular path, a slidable
ing means carried by said lever, and means for
and oscillatable lever having camming surfaces
guiding said lever in a straight line during part
for engagement by said pin, means for urging
of the movement of the camming pin, said means
said lever to follow a predetermined straight path
being movable by the lever during another part
and compressible by said lever during a portion
of the movement of the pin to guide the lever 15 of its travel under the action of the pin to guide
during its movement in a substantially semi
an end of the lever in a semi-circular path, and
circular path.
burr removing knives carried by said lever.
7. In a burr removing. apparatus, a camming
pin movable in a circular path, a slidable and
oscillatable lever driven by said pin, burr remov
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