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Патент USA US2120679

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June 14, 1938.
A. POHLE
‘ 2,120,679
GRAVITY PRESS
Filed April 24, 1957
4 Sheets-Sheet 1
w w.
ATTORNEY
June 14, 1938.
A. POHLE
2,120,679
GRAVITY PRESS
Filed April- 24, 1937
4 Sheets-Sheet 2
ATTORNEY
`Íune 14, 1938.
A_ PQHLE
2,120,679
GRAVITY PRESS
Filed April 24, 1957
4 sheets-sheet 5
ATTORNEY
`’une 14, 1938.
A_ POHLE
`
'
’
GRAvïTY PRESS
Filed April 24, 193'?
274
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ATTORNEY
.
maagd June 14,1938 _ «
UNITED STA-TES PATENT l ‘oi-‘Fics’
_ yafecten»
GRAVITY PaEss
ì
_Albert mme, Brooklyn, N. Y.
t
_ Applicatìon'April’M, 1937, Serial No. 138,741
6 Claims.
(Cl. , 101-3) y
the shaft 48. The clutch sleeve -comprises the
portion 43 which has `integral therewith the en
This invention relates to a gravity press.
The object of the invention is the production of
a gravity press for embossing doilies, letterheads,
leather goods, and various other articles.
larged portion 44 having the heel 45. The portion v
43 has a longitudinal opening 48. The shaft 40 is 1
flattened for the wearing strip 48, which is 5' `
fastened to the shaft 40, by the screws 49. In
`
The organization of the invention comprises a
gravity press having a male and female die for
objects to be embossed.
the opening 45 is positioned the clutch roller
58. On the sleeve portion 43 is loosely supported
The said objects are
automatically positioned between the dies by
the main drive gear 55. To the gear 55 are bolted
four housings 56. In each of the housings is 10
clamping devices. The lower or male die is
10 struck by a female die which drops-- at predeter
rslida-bly supported a plunger 51’ having va shoe
58, at one end. A spring 59 bears against one
end of the cavity 59a in the housing 5.6 and the
shoe 58, to force the latter to the portion 44 of the
mined intervals. Clamping devices, by means of
a conveyor'locate the objects to be embossed be
tween the -dies at the proper times. The objects
embossed are transferred to a conveyor which
15 positions them one after vthe other on a table
board.
sleeve.v A groove (i2l is indicated in the portion 15
44 of the clutch-sleeve for the shoes 58. A collar
83 is fastened to the shaft 48 and bears against '
_
The essential object of the invention is the
production of means for controlling the upper
the portion 44 of the clutch sleeve, to main
tain the clutch mechanism laterally in position.
or female die of the press. _
A bearing 10, see Figs. 1 and 3, is integral with 20
20
Other objects of the invention» will appear the frame 25 and supports thestud 1i having
from the description of the invention :as set the collar 12 at one end, and is clamped in place
forth.
~.
."
.'
the nut 13. A hub 15, is supported on the
In the accompanying drawings Fig. 1> repre `by
stud.1l. `between the frame 25 and the collar 12.
sentsfa side elevation of an exemplification of From the hub 15 extends a bell crank compris- ,25v
25 the improved gravity press; Fig. la shows an -en
_larged fragmentary >portion of Fig. 1;l Fig. 2 ing the clutch dog 11 and the arm 18. A spring
19 has one end fastened Yto the frame 25 and ,\
shows a topv view of Fig. 1 with aportion in sec
tion; Fig. 2a indicates an enlarged partial sec
tion of Fig. 1 on the line 2a, l¿_a; Fig. 3 indicates
30 a partial left hand view of Fig. 1; Fig. «iis a
section of Fig. 3 on the line 4, 4; Fig'. 5 indicates
an enlarged section of Fig. l on the line 5,` 5;
Fig. ôshows a right hand view of some of the.
'
3
elements of Fig. 5; Fig. 6a shows portions of
Fig. 6 on an enlarged scale; Fig. ’7 represents a
,
Fig. 10 shows a side view of va clutch sleeve.
40 -
Referring to Figs. 1 to 4, the improved gravity
press comprises a pair of side frames 20 and 25.’
'
vrEach of the side frames comprises the lower
. ,tapered portion 28, which joins with the upper
rectangular upper portion 29. A central bridge
30 is fastened to the frames 20 and 25 at about
the central portions thereof, and an upper bridge
3| is fastened to the top ends _of said frames.
At the lo` er ends of» said frames are shown the
feetv 32, which laterare supported upon and
50 fastened to the base plate 35.
pin 82. 'An arm 84 has one end fastened to the
pin s2. A unk ss has its ends pivoted to the
arms 18 and 84.
top view of Fig. 5; Fig.A 8 indicates an enlarged
partial section of Fig.~1 on the line 8, 8; Fig. >9
is a partial-section of Fig. 8 on the line 9, 9.and
i
its other end is fastened to the clutch dog 11.
On a rod 281, vto be described, is supported the
sleeve 80, which has integral therewith the jour- 30
nal bracket 8l, andthe latter supports a pin
82. A treadle 83 has‘one end fastened to the
1 `
'I'he main drive shaft 48 of the press has its
ends journaled in the bearings 4i of the frames
20 and 25. A one revolution trip clutch mecha
nism, see Figs. 1, 2, 3, 8, 9 and 10, is indicated
55 »to comprise a clutch sleeve loosely supported on
ï
35
When the operator bears on the treadle 83,
the clutch dog 11 is released from the heel 45 of
the portion 44 of the clutch sleeve. vIt is to be
.understood that the ygear 55 continuously turns
during the operation of the press. When the 40
clutch dog 11 has been. released, the shoes 58
will cause the sleeve having the portion 44 to
turn a little, and the clutch roller 50 is wedged
between the'wearing strip 48 and the hub of the
gear 55, and thereby the shaft 4o is turned.
5
A worm gear housing 90 is supported on the
base plate 35.
An electric motor 9i is carried
by the housing 90. A pinion of the worm gear
housing is indicated at 93‘ and is in mesh with 50
the gear 55.
l
'
,
With the rotations of> the motor 9i the gear
55 is turned. On the main drive shaft 40 is fas
tened the gear 95 (see Figs. 1 and 3). A cam
shaft 98 has its ends journaled in, the frames 2,0 55
r
and 25 and has fastened thereto the gear 00
which is in mesh with the gear 03.
Referring to Figs. l and 3, a pair of cams |03
are fastened to the cam shaft 00. A pair of slide
blocks |03 are loosely supported on the shaft 03.
A pair -0|' cam forks |01 each have a bifurcated
member |03 and each' cam fork has fastened
thereto a lifting rod |00, by the screws |00a, as
indicated. 'I‘he lifting rods |00 are guided in the
10 guide ways ||0 of the frames 20 and 25.
One
of the rods |00 has integral therewith the lug
|||.. A cap ||2 is bolted to each of the frames
20 and 25 over the guide ways ||0, to maintain
the- lifting rods |00 in operative position.
15
To each of the cam forks |01 is journaled a
roller |-|3 on the studs I |4. 'I‘he bifurcated mem
bers |00'straddle the slide-blocks |03. 0n one
end of the cam shaft 00 is fastened a V groove
pulley ||5. Adjacent to the gear 00 is fastened
to the cam shaft 00, a cam ||0.
'I'he upper
Toapairoftheangleshapedguidesinare
,bolted the journal brackets |30, which support
the shaftv|10.-A stopcollar |1| is fastened on
oneendofthelattershaft. Ontheotherend
of the shaft |10 is fastened the hub end |12 of
the lever |13 having the forked end |14. To the
middle of the shaft |10 is fastened an arm |15
and the latter is adapted to abut against the
arm |05 of the bell crank |34. Adjusting rod
|00 (see Pigs. 1, la and 3) has its upper end l.
pivoted to the forked end |14 of the lever |13 and
isguldedinthe lug ||| of one of the guiderods
|00. On the lower end of the guide rod |03 are
lindicated a pair of adjusting nuts |0|.
On top of the bridge 3| is supported a journal
bracket |00 having the leg |0|, by means of the
screws
|02.
Y
'
A shaft |04 is journaled in the bracket |00 and
at the central portion of the shaft |04 is fastened
are clamped in position by the bolts |23, and the
the cam |03. At one end of the shaft |04 is
fastened the hub end of a handle |06.
At the upper end of the bracket |00 is journaled
a second shaft |01. On the shaft .|01 is loosely
supported a bell crank having the arms |00 and
|00. To one end of the arm |00 is connected~
one end of the spring 200. The other end of the
other two gibs |2| are held in position by the
bolts |25, said bolts extending through the guides
|20. The latter gibs are adjusted in place by the
bolts |21 with the jam nuts |20.
A` slide is indicated in its entirety by the
spring 200 is connected to the leg |0|.'
The operation of the die head |32 is as follows.
When the clutch mechanism for the main driv-l
ing shaft 40 is engaged therewith, the said shaft
turns. .Thereby the gears 05 and 00 are turned.
portion of each of the frames 20 and 25 has in
dicated therewith a pair of angle shaped guides
|20, see Figs. 3 and 4. Four gibs |2| each hav
ing a V shaped> groove |22, are positioned in the
25 angle shaped guides, |20. Two of said gibs |2|
numeral |30, see Figs. 3 and 4. The slide |30 The cam shaft 00 turns with the gear 00 and the
has integral therewith the' cylindrical die head said cam shaft _00 makes one revolution for every
|32. At the lower end of the die head |32 is revolution of the clutch mechanism. The cams
35 indicated the movable die holder |33 having the
|05 of the shaft 00 raise the cam forks |01. The
dovetail sides |34. A pair of clamping plates |35 lifting rods |00 rise with the forks |01. The
are bolted to the front and rear portions of the lifting rods |00 abutting against the screws |50,
die head |32 to detachably hold the die holder _cause the die head |32A to rise. When the _cams
|33, in place. To the die holder |33 is fastened ' |05 raise the die head |32 to the end of its up
40 the female die |36, by balls not shown. The die
stroke, the arm |66 of the bell crank |64 locks
|36 can be placed in different angular positions. with the key |50. At this instant the die head
A male die |31 can be fastened in different angu
|32 is held in locked position at the upper end
lar positions to the die holder |38, having the of its stroke. The lifting rods |00 now return
dovetail sides |30. The holder |36 is slidably to their lower position. At the end of the down
stroke of the rods |00 the lug ||| will contact 45
45 supported above the central bridge 30. 'I'he said
holder |30 is detachably locked in place by the with the adjusting nuts | 0| of the adjusting rod
clamping plates |35a, that extend from the bridge |00. The said rod |00 swings down the lever |13
30. A pair of Wings |40 are integral with the and the arm |15 will contact with the bell crank
slide |30. Each of the Wings |40 has formed arm |65, which disengages the bell crank arm
therewith a pair of V shaped grooves |42. A
|66 from the key |50. By this means the die
plurality of balls |44 are positioned between each head |32 with the die drops by gravity and co
of the grooves |42 and its adjacent groove |22. acting with the lower die described embosses the
object operated upon.
Plates |45 are bolted to the Wings |40 to main
tain the balls |44 in position. From each of the
When the female upper die Idrops to the end oi'
its stroke, the tension of the spring |51 cushions
55 wings |40 extends an adjusting bracket |48, and
each of the latter carries an adjusting screw |50
the force of its descent and provides means for
with the jam nuts |5|.
the' rebounding of the female or upper die. ,
-From the upper end of the die head |32 ex
tends the cylindrical guide bar |53. At the upper
60 end of the guide bar |53 is fastened a stop plate
|54 by means of the pin |55.
At the upper end of the guide bar |53 yare
shown a pair of adjusting nuts |56. A shock
absorbing spring |51 is loosely supported on the
65 guide bar |53 and bears against the bridge 3|.
In‘the guide bar |53, see Figs. 1, la and 3, is
indicated the longitudinal keyway |50 for the
key |50. The latter is fastened in place by the
screws |60.
70
To the gibs |2| (see Fig. 4) are fastened a pair
loi’ journal brackets |62 which support a cross
shaft |63. A bell crank |64 having the arms |65
and |66 is supported on the cross shaft |63. The
said arm |66 is adapted `to bear up against one
75 end of the key |50.
For the operator of the press to locate the dies i
in place, or make adjustments, a safety device is
provided to avoid injury by the descent of the
die head |32.
When the operator swings the handle |03 in
the direction of the arrow M Fig. l, the cam |05
releases the arm |00 from the stop plate |54, by
means of which the die head |32 can descend.
Whenthe handle |06 is in the position indicated
(see Fig. l) the dieA head |32> cannot descend.
' The spring |51 as shown in Fig. 1 acts as a
cushion for the die head |32 and the location of
the nuts |56 controls the force when the die head 70
is at the end of its down stroke.
To the base plate 35 are fastened pairs of
brackets 206. 'I‘he said brackets 203 support each
one end of a rod 201. Stands 200 have extending
therefrom the vertical supporting rods 2|0 and 23
, ¿_
_
_
_
aiaoßvo
236 has its ends journaled in the brackets 283 and
2|`|. >Each of the‘iatter rods supports a bracket _ 283." A lever 233 having the forked end 234 has its
' 2|2. 'The lattereach support one end of the rods hub end fastened to the shaft 236. A connectingV
»261. Í On the supporting'rods 2|6 are secured the rod 235 connects the forked end 234 of the lever
journal and supporting brackets 2li. At the 233 and the treadle 83.> A controlling arm 236 is
upper end of eachïsupDQrtlng rod 2li is fastened vfastened to one‘end of the shaft'236 and coacts
a journal and supporting bracket 2|3 at the rear with the operating Varm 286.' A bell crank, (see
' or exit end of the apparatus. ~From the bars 246 Fig. `1) ,- 231 having the arms,238 and 233, is piv
to be described extends the curved guide plate cted to the frame zo, by means of the pivot zoo.
To the arm 233 is journale?l a rollerì362 which co 10
2 |8a. With each of the brackets 2~|8 is indicated
10~ the lug 213.-: On each of the rods 2|| is supported
acts with the cam I |8_. Iîllhe arm 238 has a forked
.the triangular shaped> bracket m- witn therm
clined table board 223.
' The _latter has adjustably connected thereto the
, stop angle plate225.
' 15
end 363, which carries a pin 364. The pin 364v
. supports the rod 366,`having a thread at one end
for the clamping nuts 361 and 368, which bear
against the pin 364.
‘ yAn adjusting screw 236. is carried by each of
'
,
'
15
The other end o_i’ the rod 366 has an eye end
the brackets zie. At one end of each of the . 363. A journal bracket 3|6 and a journal bracket
.screws 236 is supported an open journal bracket 3|| are fastened to the bridge 36. The bracket
23|. A- shaft 232 with the roller 233 is supported >3|6 has integrall therewith> the 'journal bearing
in the journal brackets 23|. At the upper ends 3|6a and has extending therefrom the pin 3|2. 20
20 of the- brackets`2|8 is journaled a conveyor drive
The bracket 3| | has integral therewith the rack `
chain shaft 235. To the shaft 235 are fastened
guide 3|3, and journal bearing 3|5. A vertically
the large sprocket chain wheels 236> and the small
sprocket- chain wheel 233. In the supporting
sliding rack bar 3| 6 is guided in the rack guide
~3|3 and is shown with the forked member 3|1
at its lower end. The latter is pivoted to the
connecting _rod 366, by means of the pin~ 319.
brackets 2|5 is journaled a conveyor chain shaft
25 24|. _The latter has fastened thereto the large
sprocket chain wheels 244. Pairs of supporting
Inthe journal brackets 3|6 and 3|| is journaled.
bars are indicatedat 246 which are supported at
a cross shaft 32|.v A gear 322 is'loosely sup
their outer ends by the brackets 2|5 and 2|3, and
at their inner ends bythe bridge 36, and have con
nected thereto the crossbars 241.
-A feed table -256 is supported on the supporting
bars 246.
‘
'
_
A pair-of conveyor sprocket- chains are each
indicated at 252 _and are supported upon the
_
sprocket chain wheels 2381and 244. Each of the
chains 252 carries a plurality of pins 253 (see Fig.
5) and on each of said pins is journaled a guide
roller 254. A pair of guide rails 256, each having
the U shaped groove 251, have integral therewith
the legs 258. The latter are supported upon and
fastened to the cross bars 241.
i
The guide rollers 254 engage the U shaped
grooves 251. The rails 256 have extending there
from the legs 256.` "
45
The members 26| and 262 of a table are sup-_
ported on the bars 246 and the lugs 253. To the
connecting bars 241 are fastened a _plurality of
brackets 265, one of which is shown in Fig. 5.
The brackets 265 support the central member
266, of said table. To each of the chains 252 are
50 connected a plurality of clamping devices, each
`designated in its entirety by the numeral 216,
(see Figs.` 1, 2, 3, 5, 6 ands'lr. Each clamping de
vice 210 comprises a pair of `lugs 21| and cach of
55
25
ported on the shaft 32| and is in mesh with the
teeth of the sliding rack bar 3|6.A
_
To the gear 322 is fastened the ratchet wheel
323 having a pair of teeth.A On the shaft 32| is.
fastened a disc 321 which carries alpawl 323-_
'I‘he latter coacts with the teeth -of the ratchet
wheel 323. To the central portion of shaft 32| 35
is fastened' a sprocket chain wheel 336. A
sprocket chain 332 engages the sprocket chain
wheels 336 and 233.
_
_
In' the journal-bearings 3|6a and 3|_5`` is 'sup
ported a shaft 335. ’ A belt pulley 336 is
to the central portion of the shaft 335.
end of the shaft 335 is fastened a pulley
ing the V groove v333. A V shaped belt
fastened 40
To one
338 hav
346 con- `
nects the pulley 338 and the pulley ||5. A belt
45
342 connects the pulley 336 and the pulley 233.
0n the table 256 are placed a plurality of
doilies 345 or other objects to be embossed.
When the press stops the operating arm__286'
contacts with the lever 236, and thereby the arm y
211, which is normally inthe closed position, is
swung operi.'l The operator now places` one or
more doilies between the clamping -bar 21'3‘ and
the rubber pad 218 (see Figs. 6 and '1). The op
_
erator now bears on the treadle 83, and the con
the latter is supported on a pair of the pins of
necting rod 235 pulls down the lever 233 and 55
thereby the shaft 236 is slightly turned. At the
its sprocket chains 252.
same time the arm 236 moves to permit4 move
.
'
To each pair of the lugs 21| is pivoted an angle
shaped clamping bar 213, by means of the screw
pivot 213a. Integral with >each clamping bar 213
60 is indicated a journal bracket 214. In each pair
of the journal brackets 214 is journaled a shaft
215;I To the shaft 215 is fastened a clamping
lever, comprising a pair of arms 216 with the
connecting member 211. A rubber pad 21.8 is
fastened to the lower face of the member 211. A
tapered operating arm 286 for each clamping de
vice 216 is integral with one of each pair of arms
216. At one end of the shaft 215 is supported the
helical spring 282. One end of the spring 282 is
70 fastened to one of the. journal brackets, 214 and
its other end is fastened to a tension collar 283,
<the latter being fastened to the shaft 215.
On one of the bars 246 (see Fig. 1) is fastened
ment of the member 211 of the clamping de
vice.
The clamping device 216 gripsv one or morepf 60
`the ‘doilies 345 and moves them in position be
tween the centers of ythe dies |36 and |31.
The sprocket chains 252 are moved as follows.
The cam ||8 swings the bell crank 291, and the
arms 238-pull down, by means of the rod 366, 65
the rack bar 3|6. The latter turns the gear
322 and thereby the pawl 328 turns the disc 321
with the cross shaft 32|. With the -rotations
of the shaft 32| the sprocket chain wheel 336
is turned, which moves the sprocket chain 332 70
- and the conveyor chain shaft 235 is turned by
the sprocket
chain wheels 233.
235. The wheels 238 turn with the shaft 235 to
a journal bracket 288, and to'the bridge 36 is ' drive the chains 252.
75 fastened a journal bracket 283. yA rack shaft
i
The rotations ,
of the sprocket chain Wheels 233 turn the shaft '
'4
’
75
4
andavo
Each time the operator trips the foot treadle
83, the chains 252 move in the direction of the
arrow A, Fig. 1, and the doilies 345 are carried
around the sprocket wheels 220, within 'the guide
plate 2I8a and move with the chains 252 untilA
the operating arm 2“ strikes the pin SI2 and
the members of the clamping device 210 are
opened.
~
.
t, The doilies now drop to the beit 342 and are
10 vconveyed in the direction of the arrow B, Fig. 1
to the table board 222, on which they are de
30
35
40
45
50
y
55
-
slide, brackets extending from the slide, and
an adjusting screw supported in each bracket
coacting with said lifting' rods to raise the slide
with the rotation of the cam shaft.
4. Inv a press of the character described the
combinationof a pair of frames, a lifting rod ad
jacent to each frame, a slide guided in the frames,
a die head carried by the slide, a guide bar ex
tending from the die head, means to lift the lift
ing rods', a lug integral with one of the lifting
rods, an adjusting rod guided in said lug, a
posited for removal. The stop angle plate 225, pair of adjusting nuts at the lower end of the
can be adjusted in various positions for doilies adjusting rod, a shaft journaled at the upper -por
of different sizes.
. '
A
tions of said frames, an arm and a lever extend
Attention is called to the fact that the mem
ing from said shaft, the swinging end of the 16
bers of the clamping device having the arms 216 lever pivoted to -the adjusting rod, a second shaft
can be moved forward or to the rear by locating journaled _at the upper portions of the frames, a
the` sprocket chain wheels 232 in different angu
bell crank fastened to the latter shaft, and means
lar ~positions on the shaft 235, to cause the chains on the guide bar adapted to be locked with an
252 Fto locate the clamping device having the arm of said bell crank, the lifting rod having the 20
arms~¢216 with the doilies in proper position.
lug when descending engaging the saíd'adjusting
The operating arm 296 is alsoadjustable to nuts and thereby causing the lever extending'
open‘ the members of the clamping device 210, from said ñrst shaft to swing down and there
when the chain> 252 is> stopped between the dies by forcing the arm of the latter shaft against one
|36 and |31.
of the arms of the bell crank an'd thereby disen»V
Various modifications might be made in the gaging the other arm of the bell crank from the
invention and the present exempliiication -is to guide rod.
‘
be taken as illustrative and not limitative there
5. In a press of the character described the
of.
combination of a pair of frames, a lifting rod ad
Having described my invention I claim:
jacent to each frame, a slide guided in the frames, 30
_ 1. In an apparatus of the character described
a die head carried by the'slide, a. guide bar ex
the combination of a pair of frames, gibs sup
tending from the die head, means to raise the lift
ported on the frames, each of said gibs having a ing rods, means between the lifting rods and slide
V shaped groove, a slide in the apparatus, said to raise the latter with the up stroke of the lift
slide being V shaped grooves positioned oppo» ing rods, a lug integral with one of the lifting 35
site the V shaped grooves in the gibs, a plurality rods, an adjusting'rod guided in said lug, a pair
of balls in the V shaped grooves of the slide and of adjusting nuts at the lower end of the ad
its coacting V shaped groove in its adjacent gib justing rod, a‘shaft journaled at the upper por?
and plates at the top and bottom ends of the tions of said frames, van arm and a lever extend
slide for each plurality of balls.
ing from said shaft, the swinging end of the lever 40
2. In an apparatus of the character described pivoted to the adjusting rod, a pair 'of journal
the combination of a pair of fra'mes, an upper bearings extending from the upper portions of
bridge connecting the upper ends of the frames, the frames, a shaft journaled in the latter bear
a reciprocating slide supported in the frames, a ings and a bell crank fastened to the latter shaft,
die hea'd carried by the slide, a female die carried akey extending from the guide bar adapted to
by the die head, a guide bar extending from the be locked with one of the arms of the bell crank,
slide and actuated thereby, said guide bar ex
the lifting rod having the lug, when descending ~
tending through said bridge, a shock absorbing engaging the adjusting nuts of its adjusting rod,
spring encircling the guide bar and bearing pulling down the lever extending -from the first
on said bridge, a pair of adjusting nuts on the of 'said shafts and thereby forcing the arm of said 50
guide contacting with said spring upon the de
latter shaft against one of the arms of the bell to
scent of the die head, a central bridge connecting dìsengage the other arm of the bell from the key
said frames, a die holder supported on the central
of the guide rod and thereby releasing the slide of
bridge, a male die carried by said die holder, said the press with its die head.
adjusting nuts with the descent of the die head
6. In an apparatus of the character described ..
contacting with said spring and cushioning the the combination of a pair of frames, a bridge
blow of the female die and rebounding the same. connecting the upper ends of the frame, a re
3. Ina press of the character described thel ciprocating slide guided in the frames, a die head
combination of a pair of frames, a cam shaft carried`by the slide, a die carried by the die
journaled in the frames, means to rotate the
cam shaft, cams supported on the cam shaft,
a pair of cam forks in the press, a roller journaled
to each cam fork coacting with said cams to
move the cam forks, a lifting rod connected to
l65
the upper end of each cam„fork, a slide guided
in the press, a dier at the lower end of the
head, a guide bar extending up from the die head,
said guide bar extending through said bridge, a
spring encircling the guide bar and bearing on
said bridge and a pair of adjusting nuts on the
guide bar adapted to contact with said spring
upon the descent of the die head.
65
.
`
ALBERT POHLE.
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