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Патент USA US2405485

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Aug. 6, 1946.
E. E. BARKSTROM ET Al.
2,405,45
’ ARTICLE FORMING APPARATUS
Filed Aug. 28, 1943
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Aug. 6, 1946.
E. E. BARKSTROM -ET AL
2,495,485
ARTICLE FORMING APPARATUS
Filed Aug. 28, 1945
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5 Sheets-Sheet 2
Aug» 6, 1946.
E. E.ß BARKsTRoM ET AL
2,405,485
ARTIGLE FORMING APPARATUS
F‘iled_Aug. 28, 1943
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5»SheetS--Sheet 3
Aug. 6, 1946.?
E, E, BARKSTROM ET Al.-
2,405,485
ARTICLE FORMING APPARÁTUS
Filed Aug. 28, -1945
5 sheets-sheet 4
Aug. 6, 1946.
E. E. BARKSTROM ET Al.
¿405,485
ARTICLE FORMING APPARATUS
F11-ed Aug. 28, 194s
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Patented Aug. 6, _1946
2,405,485
UNITED STATES PATENT OFFICE
2,405,485
ARTICLE FORMING APPARATUS
Elmer E. Barkstrom, Chicago, and Lorris Wil
liams, Western Springs, Ill., assignors to West
ern Electric Company, Incorporated, New York,
N. Y., a corporation of New York
Application August 28, 1943, Serial No. 500,362
10 Claims.
(Cl. {l0-11.64)
1
This invention relates to article forming ap
paratus and more particularly to apparatus for
substantially along the line 6--6 of Fig. 1 in the
direction of the arrows;
forming spiral resistors.
Fig. '7 is an enlarged view of the article manu
factured in the apparatus shown in the other
It is an object of the present invention to
provide a semi-automatic apparatus of simple
views;
construction for expeditiously forming articles.
Fig. 8 is a circuit diagram showing the con
trol circuit of the apparatus.
Referring to the drawings, particular reference
being iirst had to Fig. 7, wherein the article
In accordance with one embodiment of the
invention, an apparatus is provided for forming
resistors by cutting a spiral groove in a cylin
drical member made of ceramic material and
formed in the apparatus is shown on an enlarged
having an electrical conducting coating thereon.
In this apparatus, the coated cylindrical mem
ber is placed in co-axially aligned chucks, one of
which is positively driven and the other of which
is mounted for free rotation and then, upon the
operation of a single manually operable lever, a
15
cycle of operation is initiated which moves a
cutting disc or wheel into engagement with the
coated cylindrical member and then causes the
scale, it will be seen that the resistor designated
I0 formed in the apparatus comprises a cylin
drical member II„ which may be any suitable
ceramic coated with conducting material; for
example, particularly a carbon deposit, -and hav
ing a spiral groove I2 formed in it extending
substantially the entire length of the member I I.~
It will be apparent that a resistor of this type
may be formed with a high degree of accuracy
cutting wheel to travel longitudinally of the 20 by causing the current ñowing through the re
sistor to travel around the circuitous path formed
cylindrical member, which is simultaneously
by the conducting material remaining upon the
rotated at a relatively slow rate of speed, where
cylindrical member after the groove has been
by the cutting wheel cuts a spiral groove in the
formed in the cylindrical member and that the
cylindrical member. The cutting wheel is thus
automatically advanced upon moving it into en 25 resistance of the resistor may thus be controlled
with a high degree of accuracy by adjusting the
gagement with the coated cylindrical ceramic
angularity by which the spiral groove is cut in
member and at the end of its cutting operation,
the resistor.
Y
»
is moved out of engagement with the cylindrical
As may be seen most clearly by reference to
member and into engagement with a reversing
screw, which returns the apparatus to its normal 30 Figs. 1, 2 and 3, the apparatus includes a lathe
frame I 3 having Suitable legs or standards III-I4,
starting position, where it is automatically
which may be positioned upon a bench or table
stopped for unloading and reloading of the ap
paratus.
I5 at a suitable height to accommodate an op
erator using the machine. The lathe frame I3
A complete understanding of the invention
may be had by reference to the followingr detailed 35, has a bearing I 6 formed adjacent its right end
(Fig. l) for rotatably supporting one end of the
description when considered in conjunction with
feed screw I'I, the other end of which extends
the accompanying drawings, wherein
into a gear box I8, in which suitable gearing may
Fig. l. is a front elevational View of a preferred
be mounted for transmitting motion from a
form of the apparatus;
Fig. 2 is a horizontal sectional View taken sub 40 pulley I9 to a spindle 20 and to the feed screw
I1. The pulley I9 is adapted to be driven b_v a
stantially along the line 2-2 of Fig. 1 in the di
motor 2| through the belt 22. The spindle 20 is
rection of the arrows;
suitably iournalled for rotary and sliding move
Hg. 3 is a vertical sectonal view taken sub
ment in a bearing 23 formed on the gear box I 8
stantially along the line 3_3 of Fig. 1 in the di
and in a bearing bracket 24. The spindle 20
rection of the arrows and showing the apparatus 45 carries a chuck 25, as seen most clearly in Figs.
on a somewhat larger scale than shown in Fig. 1;
l, 2 and 6, which may be of any suitable con
Fig. 4 is a rear elevational view of a portion l
struction as long as it includes a pair of chuck
jaws fifi-«2.5i adapted to be clamped onto a re
taken in the direction of the arrows along line 50 sistor IB when> the spindle 20 is moved to the
4_4 of Fig. 2;
left due to the engagement of cam faces 2'I-2‘I
Fig. 5 is an enlarged fragmentary vertical
on the chuck jaws with cooperating cam faces
sectional View taken substantially along the line
28-28 on a collar 29, which is fixed against
5-5 of Fig. 2 in the direction of the arrows;
slidable movement with respect to the bearing
Fig. 6 is a greatly enlarged plan section taken 55 bracket 24, but which rotates with the spindle>
of the apparatus shown in Fig. >2, the View being
2,405,485
3
2B.
4
The left end of the spindle 20 has a collar
link Sii to pass through it freely. The lever 82 is
3|] threaded on it or otherwise suitably attached
to it and between the collar 3U and the left of
the bearing 23 a compression spring 3| is posi
turn, supported by the gear box I8. Intermediate
pivotally mounted on a bracket B3, which is, in
its ends, the lever 82 has a threaded member 84
locked in it by means of a lock nut 85. The
threaded member 85 is adapted to engage the
collar 35 and move the spindle 2Q to the right
when the link 86 is moved to the right by control
tioned around the spindle 2|), whereby the spin
dle 20 is always urged to the left (Figs. l and 2) ,
thus to urge the chuck jaws 26 to the left, where
they will be cammed down into engagement with
a resistor I3 to be grooved in the apparatus.
lever 18. From the foregoing, it is believed to be
Mounted in axial alignment with the chuck 10l apparent that when the control lever "I6
25 is a second resistor holding chuck 35, as seen
rocked counterclockwise from the position shown
most clearly in Fig. 6. This chuck comprises a
.in Fig. 2, the spindle 2U will be moved to the
spindle 36 having a shouldered portion 31 in which
right to cause the chuck jaws 28 to move,` to the
a resistor-holding tool 38 may be ñxed by means
right andopen and at the same time the resistor
of a set screw 33. The resistor holdingY tool 33.
holding tool 38 will be moved to the right at the
has a centrally positioned tapered aperture 4I), in
same time that the chuck jaws move to the right.
which the right end (Fig. 6) of a resistorV may
Further movement may be imparted to the re
seat itself when the chucks 35 and 25 are in the
sistor holding tool 38 and its associated spindle 36
position shown in Fig. 6. It will be understood
manually at the end of an operation to disengage
that the tool 3B does not clamp the resistor I@ 20 the resistor IIl from the chuck jaws 2S.
except insofar as the resistor II] is pushed into
The lathe frame I3 has ways 95, 9G and 91
the tapered aperture 40. The right end ofthe
formed on it, on which there is slidably mounted,
spindle 35 (Fig. 6) has a collar 4I fastened to it
as seen most clearly in Fig. 3, a tool carriage 93.
which cooperates with offset portions of the
The tool carriage 98 is provided >with a depending
spindle to hold a pair of bearing races 42-42 in 25 portion 99, in which a suitably threaded device is
place on the spindle. The bearing races 42 co
operate with outer races 43-43 to rotatably sup
port the spindle 35 in a sleeve 44 and the outer
races 43 are clamped in the sleeve 44 by means
of a spacer 45 and threaded collar 4S. The sleeve
positioned for engaging the feed screw I1 to move
the tool carriage 98 longitudinally of the ma
chine, that is, from left to right or vice versa (Figs.
l and 2). The carriage 98 has a dove-tail I0!!
formed upon it for engaging in a dove-tail slot I GI
44 i5 slidably mounted in a cylinder 41, having an
internal shoulder 48 towards which the sleeve
formed in a cross slide |02, The cross slide |02 is
normally urged to the left (Fig. 3) by a compres
sion spring |83 seated in a slot |24 formed in the
dove-tail IBI) and engaging a downwardly extend
ing portion |05 of the cross slide |32. In this
44 is normally urged by a compression spring 49
interposed between a threaded plug 523 threaded
into the right end (Fig. 6) of the cylinder 41 and a
disc 5| engaging the pin 52 which extends through
manner, the cross slide |92 is urged toward the
the sleeve 44 and cylinder 41. The pin 52 is ñxed
rear of the machine (to the left, Fig. 3) bythe
to the sleeve 44 and is slidable in anaperture
spring ID3. However, the cross slide |92 is nor
53 in the cylinder 41. The cylinder 41 is mounted
mally prevented from, moving beyond the posi
upon a tail stock bracket 54, which extends up 40 tion shown in Fig. 3 due to the engagement of
wardly from a tail stock 55, suitably mounted upon
a latch member |06 formed thereon with a latch
the lathe frame I3.
|01 which is pivotally mounted on a pin |68 ñxed
Mounted upon the bracket 54I of the tail stock
in a bracket I |39 suitably attached to the tool car
adjacent its right end (Fig. 2) is a block E5, carry
riage 98. The left end (Fig. 3) of the latch Iû'I
ing a pivot pin 6,6 (Figs. 2 and 5) on which there 45 is pivotally connected to a core IIB of a solenoid
is, in turn, pivoted a bell crank lever E1. The bell
III, also suitably mounted on the bracket |39 by
crank 61 has links 68 and 89 connected to it and
means of'a block I l2.
the link 58 is, in turn, pivotally connected, as
shown most clearly in Fig. 3, to an enlarged por
tion of the pin 52, which serves to actuate the
be either locked in the position shown in Fig. 3
or may be pushed to the rear of the machine (the
sleeve 44. The link 65 is slidable in a bearing 1S
(Figs. 2 and 5) mounted upon aV bearing plate
1|, which is„in turn, attached to the lathe frame
a
The cross slide |92 may
left, Fig. 3) to bring the downwardly extending
portion |05 thereof into engagement with an
abutment surface II3 formed on the tool car
riage 98.
I3 by means of a block 12 and a. machine screw
Pivoted on a pin IIB (Figs. 2 and fi), which
13. The bearing plate 1I, in addition to. support
ing the bearing 10, supports a bearing 14, in which
extends downwardly from the bearing plate 1I.
there is rotatably mounted a shaft 15. One end
of the shaft 15 has a control lever. 16 fixed to it.
The other end of the shaft 15 has a lever. 11 iixed
to it, the purpose of which will be described here 60
inaftenand intermediate the bearing 14 and lever
11 the shaft> 15 carries a cam 18. The control
lever 16 has a camming block 19 `suitably attached
toit in position to engage the link 69 and through
the link 69 rock the bell crank |31` in a counter
clockwise direction (Fig. 2) for moving the link
68 to the right and releasing the resistor holding
the
tool apparatus.
38 from a resistor which has been grooved
is a cam actuated lever IIâ, which has a cam
roller` |28 mounted'thereon in alignment with the
cam 1B. The cam roller |20 is urged into engage
ment with the surface of‘ the cam 18 by a con
tractile spring I2| attached to the right' end
(Fig. 2) of the‘lever IIà and'to'a pin` |22 extend
ing downwardly from the bearing plate 1I. The
spring I2| normally tends to hold the lever I'IQ
in the position shown in Fig. 2 to hold an actuator
roller I 23 mounted on the left end of the lever H3
(Fig. 2) out of engagement with. an abutment
|24 on the cross slide |û2. The lever IIS in the
position shown in Fig. 2 also carries a switch actu
ating screw I25 out of engagement with the actu
The lever 11 has a link 80 attached to it, which 70 ating plunger |26 of a switch |21, which is also
extends substantially the entire length of the
suspended from the bearing plate 1|. When the
apparatus, as shown in Fig. 2.` At its left en ,
as viewed in Figs. l and 2, the link 80 has a lock
control lever 15 is rocked in a clockwiseY direction
(Fig. 2), the cam 13 will rock the lever IIS
counter-clockwise to close switch |21 and to cause
nut assembly 8| threaded onto it to the left of a
lever 82, which is suitably apertured to permit the 75 the actuator roller |23 to push the cross slide
2,405,485
'
|02 over to the position shown in Fig. 3, where
the cross slide will be latched by the interengage
ment of the latch member |01 with latch |06.
Simultaneously with the shifting of the cross slide
|02, switch |21 will be closed to initiate opera
tion of the motor 2|, as will be described more in
detail in connection with the description of the
operation of the apparatus.
Mounted on the cross slide |02 is a plate |33
The plate |34, in
turn, supports a plate |35, which, as seen most
clearly in Fig. 4, is pivoted on a mounting screw
|36 and may be held in any one of a plurality of
engages actuating roller |15,
adjusted positions by a positioning uscrew |31,
which is threaded into the plate |35 and extends
through a slot |38 in the plate |34 (Fig. 4). By
this construction, the angular position of the
plate | 35 with respect to the Iplate |34 may be
adjusted. Mounted upon the plate |35 adjacent 20
its upper end is a motor |39 for driving a pulley
.
and |13 are adapted to be closed yat approximate
ly the same time at the end of a cutting or grind
ing operation on a resistor I0. As shown most
clearly in Fig. 8, closure of switch |13 will ener
gize solenoid ||| provided current has been sup
plied to the switch |13 from a transformer |80
due to the closure of a main control switch |8|
connected toa suitable power source |82.
The switch |12 is a double-throw switch nor
mally biased to close a circuit to a contact |83,
but shiftable to transfer its movable contact |84
to engage a fixed contact |85 when the cam |18
having- formed integrally with it an upwardly ex
tending support plate |34.
6
the roller |14, switch |1| will open. Switches | 12
The control cir
cuit ~for the apparatus includes a pair of relays
|86 and |81, which, upon alternate energization,
serve to connect power from the 'source |82
through switch |8| to opposite sides of the mo
tor 2|, to thereby cause the motor to operate in
opposite directions, as will be described more
fully in connection with the following brief de
|46, which, in turn, drives a belt |4|, The belt
scription of the operation of the apparatus.
|4| transmits motion to the pulley |42 mounted
In the operation of the apparatus, the lever 16
vupon the end of ashaft |43. The shaft |43 is
may be moved to the position indicated by the
journalled in a bearing |44 and has i'lxed to it a
dot and dash lines |89 at the start ofthe opera
cutting wheel |45. The bearing |44 is formed 25 tion of the apparatus to permit -the loading of a,
integrally with a block |46, which is pivotally
cylindrical member || of ceramic material coat
mounted on pivot pins |41 and |48 threaded into
‘brackets |49 and |50, respectively, extending out
ed with a suitable conductor between the chucks
25 and 35. When the lever 16 is moved to the dot
wardly from the plate |35 (Figs. l and 4). The
and dash line position |89, the camming block 19
block |46 has a post |5| extending outwardly 30 will engage the end ofv the link 69 and will rock
therefrom through which extends a threaded pin
the bell crank 61 counter-clockwise, thereby,
|52. The threaded pin | 52 is fixed to the plate
through link 68 and pin 52, to compress the
| 35 and extends through an aperture |53 in the
spring 46 and retract the spindle 36 and resistor
post |5|, Positioned around a reduced portion
holding tool 33 to the right. Simultaneously with
of the pin |52 is a compression spring |54, which
the movement of the resistor-holding tool 38 to
engages an enlarged portion of the pin |52 and a
the right, lever 11 will rnove link 80 (Fig. 2)"to
washer |55, which bears against the post |5|.
the right to thus move chuck jaws 26 to the right
From the foregoing, it is believed to be apparent
and since these jaws are, as is usual in chucks of
that the spring |54 normally tends to hold the 40 this type, resiliently urged to open, the chuck 25
post |5| in the position shown in Fig. 3, where
will be moved to the right and will open its jaws,
it is in engagement with a knurled thumb nut
|56 threaded onto the pin |52. The lower end
of the block |46 is thus urged to the right (Fig.
3) to carry the cutting wheel |45 into engage
ment with a resistor I0, the block |46 being urged
to move to the right (Fig. 3) by the compression
thus permitting an operator to insert a cylindri
cal member || between the Chucks 25 and 35.
After a cylindrical member | | has been mount
f .ed in the chucks 25 and 35, the lever 16 may be
moved to assume the position indicated by the
dotv and dash lines |90 toy initiate a groove-cut
spring |54 pressing against the post |5l. The
ting operation on the member ||, When the le
plate |35 has an irregularly shaped housing |51
ver 16 is moved to the position indicated by dot
mounted upon it, in which the cutting wheel |45 50 and dash line |90, the spring 3| will be permitted
is encased. The housing |51, as seen most clear
to shift the chuck jaws 26 to the left to clamp
onto the cylindrical member || and the spring
49 will be permitted to push the resistor-holding
is also provided with an aperture |59 through
tool 38 to the left (Fig. 6), thus to firmly grip the
which a portion of the cutting wheel |45 extends 55 cylindrical member || between the two chucks,
to engage the resistor I0. Coolant may be sup
As the lever 16 moves to the position indicated
plied to the housing |51 to cool the cutting'wheel
by line |96, switch actuating screw |25 will close
|45 through a port |6| from a hose connection
switch |21 and actuator roller> |23 will force cross
|62 extending to a suitable source of supply. The
slide |92 to the position shown in Fig. 3, where
bottom of the housing |51 has an outlet port |63,
it will be latche'd by the interaction of the latch
60
through which the coolant may drain.
member |06 and latch |01. . It will be understood
A bracket |10, as shown most clearly in Fig. 3,
that prior to manipulation of the lever 16, switch
ly in Fig. 6, is provided with an aperture |58,
through which the shaft |43 passes freely and it
is mounted upon the bench or table l5 and car
ries three switches |1|, |12 and |13, having actu
| 8| has been closed to supply power from the
source |82 to the transformer |80 and thence to
ating rollers |14, |15 and |16, respectively, posi 65 the
motor |39, which is permanently connected
tioned to be engaged by cam members |11, |18
to the secondary of the transformer |80. Thus
and |19, respectively, suitably mounted upon the
the cutting wheel |45 will be continuously driven
bracket |69 in position to engage the rollers |14,
whenk power is supplied to operate the other por
|15 and |16 at predetermined times in the oper
tions of the apparatus. The switchv |21, having
ation of the machine and thereby Aclose their as 70 been closed by the rocking of lever ||9 counter
sociated switches I 1|, |12 and |13. The switch
clockwise by the cam 18, will connect one of the
|1I, when the machine is in normal inoperative
leads from the switch |8| to the winding of re
position, is held closed by cam member |19. This
lay l86, the other side of the Winding of which is
switch, however, is a normally open switch and,
permanently connected to one of the lea'ds lead
as soon as the cam member |19 moves away from 76 ing to switch IBI. Thus, the relay |86 will be en
2,405,485
:ergized :and will, through 'its contacts, 'supply
power :to drive the motor2| in a direction to
cause the tool ycarriage 98 to -move to the right,
'as viewed 'in Fig. 4, and to the left, as viewed in
Figs. 1 and 2. As soon as the -tool carriage starts
»to move, the spring |54 urging the -block |46 to
‘rock ‘counterclockwisa as viewed in Fig. 3, will
resiliently urge the cutting wheel |45 against the
ing the vcutting means ,into engagement wit-hthe ,
blank, a cam for 'actuating :said Ylever means,
means for advancing the cutting means longitu
dinally of the blank during 'the rotation 'of the
blank, means actuated-by said lever 'means 'for
initiating operation of said advancing means,
means operable for reversing the operation of lthe
advancing means, and means movable with the
-cutting means during its advance for rendering
cylindrical member |`|- and the gearing in the
Ygear box I8 will drive the spindle 20, thereby to 10 the >operation reversing means operative.
2. An article-forming apparatus comprising
.rotate the cylindrical member || at a relatively
means -for rotating a blank 'including chucks for
slow rate of speed while the tool carriage moves
holding the blank, cutting means engageable
the cutting wheel longitudinally of the cylindri
with the blank, means for advancing the cutting
cal member |‘|, thus to cut a spiral groove in the
fcylindrical member |"I and form the resistor l0. 15 means longitudinally of the vblank during the ro
tation lof the blank, means for initiating opera
tion 'of said advancing means, including lever
lto’ the position shown in Fig. 3 and switch |21
means for shifting isaid cutting means into en
has been momentarily closed, the lever 16 may
gagement with the blank, means operable for re
be released and >power will then be supplied to
'-hol'd relay |86 energized over llocking Contact bar 20 versing the operation of the advancing means,
-means >movable with the cutting means during its
|91, through contacts |83 and |84 of switch |12.
longitudinal advance for rendering the operation
Thus the tool‘carriage 98 will continue to move to
reversing means operative, cam means for actuat
ïthe >left V(Figs. 1 and 2; the right, Fig. 4) until
ing said lever means, a manually controlled shaft
»cam members |18 and |19 engage their associ
ated `actuating rollers |15 and |16 to close 25 `for supporting and operating said cam means, a
.As ‘soon as the cross slide m2 has been moved
`switches >l1? and |13.
The two cam members
|18 and |19 may be so arranged that they will
simultaneously eiïect the closure of switches |12
or<i13-or preferably switch |13 may be closed just
second cam means on said shaft, and linkage
means operated by said second cam means and
'chucks for operating said chucks.
3. An article-forming apparatus comprising
When 30 means for rotating a blank, a cutting wheel en
gageable with the blank, a support for said cut
tingwheel, a lever for shifting said support to en
ergize Ythe solenoid lll, thus releasing latch |01
gage the cutting wheel with the blank, a switch
from latch member |05 andpermitting spring
operable by said lever for initiating operation 'of
|03 'to move the cross slide |02 to the left from
the ’position shown in Fig. 3. VAs soon as switch 35 fthe rotating means, `a carriage for carrying said
a very> ‘short 'time before switch |12.
'switch ' |13 closes, power will be supplied to en
'|12 operates, the locking circuit for relay |36 will
-yb'e broken `at switch V|12 and a circuit will be com
:support longitudinally of the blank, a reversible
drive means for said carriage and said rotating
means, switch actuators carried by said carriage,
pleted momentarily to energize relay |81. When
a control circuit for said reversible drive means,
relay |81 is momentarily energized, it will be
locked up through locking contact bar |92 and 40 `:andswitches positioned for actuation by 'said
'switch actuators and operable upon initiation of
the fnow closed switch |1|. YEnergization of re
operation of the rotating means for sequentially
lay 181 will reverse the connections to the motor
effecting ‘the disengagement of the cutting wheel
2| and'cause it to drive the -spindle 2B and feed
from the blank and causing the control circuit
screw i1 in the opposite direction to return the
tool carriage YS18 to its right-hand position, as 45 to `reverse lthe operation of the drive means.
4. An article-forming apparatus comprising
‘viewed in Figs. 1 and 2, or its left-hand position,
means for rotating a blank, a cutting wheel ‘en
as viewed in Fig. 4. The motor is a two-speed
'gageable with the blank, a support for said cut
Ymotor and the carriage is returned at a speed
ting wheel, a lever for shifting said support to
double that of the 'forward or cutting movement.
The 'travel of the tool ~carriage back to normal 50 engage the cutting wheel with the blank, a'latch
-for holding said support in position to hold the
position will continue until cam member |11
cutting wheel lin engagement with the blank, a
opens switch Ill, which breaks the locking cir
solenoid ‘for releasing said latch, means for ad
cuit for relay itl and `restores the circuit to nor
vancing the support longitudinally of the blank,
'Ii it be assumedthat the plate |35 has been 55 `means common to vthe rotating and >advancing
mal.
'adjusted to proper `angular relation with respect
"to the plate |34 and locked in that position prior
means for actuating them, means operable by
said ‘lever for initiating operation of the means
operation of the lever 16, by the operator manu
vancing the support longitudinally of the blank,
common to the advancing and rotating means,
'to the initiation of the operation of cutting a
and means actuated by the support >at the end of
“groove in a cylindrical member ll, the width of
'the groove formed and its length may thus be 60 its advance for energizing said solenoid.
5. An article-forming apparatus comprising
controlled'with a high degree of accuracy, where
means 'for rotating a blank, a `cutting wheel en
`by the resistance of the resistor lil may be con
gageable with the blank, a support for said cut
' rolled. After the resistor has been formed by
ting wheel, a lever for shifting said support to
'cutting the groove |2 ‘in it, the lever 1S may be
moved to the position'indicated by dot and dash 65 engage the cutting wheel with the blank, a latch
for holding said support in position to hold the
lines at §89 and the completed resistor may be
‘cutting wheel in Vengagerlrlent with the blank, a
removed 'from the chucks 25 and 35, which have
solenoid for releasing said latch, means for ad
now been shifted to the right (Fig. 2) due to the
means common to the rotating and advancing
means for actuating them, means operable by
said lever for initiating operation of the means
'What is claimed is:
»common to the advancing and rotating means,
1. An article-forming apparatus comprising
means-actuated by the support at the end of its
means for rotating a blank, cutting means en
4advance
for energizing said solenoid, and a sec75
gageable with the blank, lever means for mov
ally moving the spindle 35 to the right, as seen
fin Fig. 6.
Y
2,405,485
9
10
ond means actuated by the support at the end of
its advance for reversing the operation of the
means common to the advancing and rotating
means for returning the support to position to
actuators when the carrier reaches its eXtreme
advanced position for effecting the disengage
have operation of the advancing and rotating
means initiated.
6. An article-forming apparatus comprising
means for rotating a blank, a cutting wheel en
ment of the cutting means from the blank. '
8. An article forming apparatus comprising
means for holding and rotatably supporting an
article, a cutting tool, means for supporting said
cutting tool for relative movement longitudinally
and toward and away from said article, an oper
ating lever, means responsive to an initial move
gageable with the blank, a support for said cut
ting wheel, a lever for shifting said support to 10 ment of said operating lever for actuating said
article holding means, means responsive to a fur
engage the cutting wheel with the blank, a latch
for holding said support in position to hold the „ ther movement of said lever for relatively mov
ing said cutting tool toward said article in said
cutting wheel in engagement with the blank, a
article support, means for relatively moving said
solenoid for releasing said latch, means for ad
vancing the support longitudinally of the blank, 15 cutting tool longitudinally 0f said article, means
for initiating said longitudinal movement in re
means common to the rotating and advancing
sponse to said further movement of said operat
means for actuating them, means operable by
ing lever, and means for relatively withdrawing
said lever for initiating operation of the means
said cutting tool from said article and restoring
common to the advancing and rotating means,
means actuated by the support at the end of its 20 it to starting position after a predetermined 1on
gitudinal traverse.
advance for energizing said solenoid, a second
9. An article forming apparatus comprising
means actuated by the support at the end of its
means for rotatably supporting an article, a cut
advance for reversing the operation of the means
ting tool, means for supporting said tool for move
common to the advancing and rotating means for
returning the support to position to have opera' 25 ment transversely and toward and away from
said article, a reversible motor for moving said
tion of the advancing and rotating means ini
tool longitudinally of the article, a control circuit
tiated, and a switch operable by the support upon
for said motor, a switch in said control circuit
its return to restore operability to the initiating
for initiating the energization of said motor, a
means.
_
7. An article- forming apparatus comprising 30 holding circuit for maintaining said energization
chucks for supporting a blank, means for rotat
after said switch is released, means in said con
trol circuit for reversing said motor after a
ing said chucks to rotate the blank, cutting
predetermined travel, and means for stopping
means engageable with the blank, lever means
said motor when said cutting tool is restored to
for moving the cutting means into engagement
,
with a blank held by the chucks, means actu 35 its initial position.
10. An article forming apparatus comprising
ated by said lever means for operating said
means for rotating a blank, a cutting tool, a sup
chucks, a carrier for supporting the cutting
port for said cutting tool, means for shifting said
means for movement longitudinally of the blank
support to engage the cutting tool with the blank,
during rotation of the blank, drive means for ad
vancing and retracting the carrier means and for 40 means operable to initiate operation of said ro
tating means, a carriage for carrying said sup
the means for rotating the chucks, means on said
port »longitudinally of the blank, a reversible
lever means for initiating operation of said driv
drive means for said carriage and said rotating
ing means, a circuit operable under control of
means, switch actuators carried by said carriage,
said means for initiating operation of the driv
ing means, a plurality of switch actuators car 45 a control circuit for said reversible drive means,
and switches positioned for actuation by said
ried by the carrier means, a switch in said circuit
switch actuators and operable upon initiation of
' operable by one of said actuators to prepare a
operation of the rotating means for sequential
circuit for reversing the direction of operation of
ly effecting the disengagement of the cutting
the driving means when said carrier is in normal
inoperative position, a second switch in said cir 60 wheel from the blank and causing the control
circuit to reverse the operation of the drive
cuit for actuation by one of said actuators to
cause a reversal of the driving means when the
carrier means reaches a predetermined position, v
and a third switch for actuation by one of said
means.
l
ELMER E. BARKSTROM.
LORRIS WILLIAMS.
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