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Патент USA US2111332

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March 15, 1938.
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Filed April 23, 1957
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Patented Mar. 15, 1838
I 2,111,332
Cincinnati Milling Machine Company, Oincinnatl, Ohio, a corporation of Ohio
Application April t8, 1'87. Serial No. 188.889
89 Galina. (Cl. $18.5)
This invention relates to die sinking machines, the tangent at the point of contact with the
and more particularly to an automatic multiple surface.
It is another object of this invention to provide
pattern-controlled machine tool.
Certain industries depend almost entirely upon a machine of the character described in which
a diesforimpartingtheshapeorcon
?guration to their articles of manufacture, and
this is especially true in the bottle-making in
dustry. Such dies are usually made in two halves,
which are assembled for casting purposes; and
it) subsequently separated to remove the cast article.
It will be apparent that the halves of the die will
have a cavity of semi-cylindrical shape for the
manufacture of ordinary round bottles; and
various other shapes for odd shaped bottles,
15 which may be generally classi?ed as quasi semi
If these cavities had su?iclent size, a cutting
‘tool could be mounted for swinging movement
about a center lying in the parting line of the
20 mold. This would permit the best cutting action
because it is recognised that an end mill or and
cutting tool operates most satisfactorily when
maintained perpendicular to a tangent to the
surface at' the point of contact with the tool. In
as the type of dies under consideration, it is rarely
possible to mount the tool in this relation to
the mold on account of the smallness of the
the work and tool are mounted on swinging sup- 5
ports rather than sliding supports, and in such
a balanced manner that a minimum of power is
required to manipulate them during the cutting
‘ operation.
A further object of this invention is to provide 10
an automatic pattern controlled machine tool
which is capable of producing a plurality of dies
or molds simultaneously from a single pattern.
An additional object of this invention is to pro
vide an hydraulically operated automatic pattern 16
controlled machine tool in which the operating
?uid is automatically and continuously cleansed
during the operation of the machine and in which
the temperature of said ?uid is maintained sub
stantially constant within limits, thereby go
eliminating the necessity for viscosity compensat
ing devices.
Other objects and advantages of the present
invention should be readily apparent by refer
ence to the following speci?cation considered in 25
conjunction with the accompanying drawings
illustrative of one embodiment thereof, but it will
be understood that any modi?cations may be
made in the speci?c structural details within the
;10 vide a machine of the character described in scope of the appended claims without departing 30
which the cutting tool and the mold are so sup- \ from or exceeding the spirit of the invention.
Referring to the drawings in which like refer
ported and manipulated during the progress of
the cutting operation that a better cutting angle ence numerals indicate like or similar parts:
Figure l is a perspective view of a machine em
between the tool and the work is maintained
One of the objects oi’ this invention is to pro
35 throughout the operation than has been possible
in prior machines.
Another di?iculty in the formation of the
bodying the principles of this invention, having 35
partially broken-away parts to bringlout certain
features of the operating mechanism.
particular dies or molds under consideration is
when the feeding cut is being taken longitudinally
cutter and the tangent to the surface at the
Figure 2 is a front view of a portion of the
machine shown in Figure 1 with certain parts
broken away, and other parts in cross-section.
Figure 315 a cross-section through the machine
as‘viewed on the line 3-3 of Figure 2.
Figure 4 is a cross-section through the reser
point of contact with the cutter, said tangent
voir tank.
40 of the mold, and the index ieed effected in a
cross-sectional plane, that due to the acute
angular relationship between the axis of the
45 lying in a cross-sectional Plane, a uniform angular
index to the mold will not produce a uniform
indexing movement between the cutter and the
work as measured along the surface being pro
It is one of the objects of this invention to pro
vide a novel and improved indexing mechanism
which will produce a substantially uniform length
of indexing movement as measured along the
surface being produced, regardless of its shape,
55 or the angular relationship 01' the cutter axis to
Figure 5 is a section through the machine show- 45
ing a cutter support and work support unit in
elevation, as viewed on the line H of Figure 2.
Figure 6 is a section through the pattern sup
port unit as viewed on the line 6-,4 of Figure 2. m
Figure 7 is a detail section taken on the line
1-1 of Figure 8.
Figure 8 is a vertical cross-section through the
tracer support unit shown in Figure 3.
Figure 9 is a cross-section through the pattern 5'
Figure 10 is a section through the pattern sup
port housing as viewed on the'line ll-il of
Figure 6, showing the indexing drive mechanism.
Figure 11 is asection through the valve block
as viewed on the line il--li of Figure 3.
Figure 12 is a detail view of the ratchet mecha
nism as viewed on line I2--i2 of Figure 2.
Figure 13 is a section on the line iI-il of
Figure 2 showing the index drive mechanism to
the work support. '
Figure 14 is an enlarged view of the variable
index feed control mechanism.
Figure 15 is a detail section on the line il-ll
of Figure 14.
Figure 16 is a section through the reversing
valve for the indexing cylinder as viewed on the
line It—ll of Figure 2.
Figure 17 is a horizontal section through the
work holder unit.
Figure 18 is a detail section on the line 18-"
of Figure 7.
Figure 19 is a diagrammatic view of the hy
25 draulic control circuit.
Figure 20 is an enlarged detail view of the
trip control mechanism associated with the pat
tern support.
Figure 21 is a section on the line 2i-2i of
30 Figure 20.
Figure 22 is a section on the line 22-22 of
Figure 20.
Figure 23 is a diagram for use in explaining
the principle of indexing.
Figure 24 is an enlarged detail sectionas viewed
on the line 2|--2l of Figure 3.
Figure 25 is a section through the valve block
as viewed on the line 28-25 of Figure 3.
Figure 26 is a section on the line 26--2l of
40 Figure 24.
Figure 2'7 is an enlarged detail of portions of
the tracer support.
Figure 28 is a section through one of the cut
ter carriers showing a low speed cutter spindle
unit substituted for a high ,speed spindle unit.
Figure 29 is a-“section on the line 20-28 of
Figure 28.
Referring to Figure l of the drawings, the
reference numeral 25 indicates the base or main
50 support of the machine which has a predeter
mined width, but may be made of any suitable
length depending upon the number of cutting
units to be mounted thereon. This machine is
a multiple die-sinking machine, and to that
end there is mounted upon the support, a central
unit 28, which may be termed the control unit,
because it includes the pattern and tracer; the
ispivotaily connected at II to
ciliatable shaft a. The crank 21 has an arm 2|
which is pivotally connected at 0 to a piston
rod ll. The piston rod passesthrough one end
of a cylinder 42, for attachment to a piston 42.
The cylinder 42 is trunnioned to'swing about a
pivot II, It will now be evident that admission
of ?uid pressure to the right hand end of cylin
der 42 will cause counterclockwise rotation of the
crank 81 and a downward swinging movement of
the tracer unit 22; while admission‘ of fluid pres
sure to the other end of the cylinder will cause
a reverse direction of movement of the con
nected p'arts.
In this machine the cutting is performed dur
ing the upward swinging. movement of the tracer
and connected cutters, and therefore ?uid pres
sure is forced into the left end of cylinder 42
to sheet the feeding or cutting stroke, and after 20
separation of the work from the cutters, fluid is
forced into the right hand end of cylinder 42 to
eifect a rapid traverse downward movement.
The pattern which cooperates with the tracer
is supported in a swinging carrier 45 which is
trunnioned at 48 to the bed 2! for movement to
ward and from the tracer support. It will be
noted that the dead weight of this carrier is
carried at all times by the bed 25, and that it
stands in substantially a perpendicular position 30
so that very little effort is necessary to swing the
carrier toward and from the tracer unit. As
shown in Figure 2, the carrier 45 has an upward
ly extending lug 41 upon the sides of which are
formed guide surfaces It and 49 which are in 35
contact with guide surfaces 50 and Si formed
in a bracket 52 which overhangs from the col~
umn 8i. This guiding means insures against
any side sway or weaving of the carrier during
the "in and out" movement.
The carrier ll is oscillated toward and from
the tracer unit by means of a link 53 which is
pivotally connected at 54 to the carrier, and at
I! to a crank II which is integrally secured to
a longitudinally extending oscillatable shaft 51. 45
The crank 58 has a pivotal connection at 58 with
piston rod 50, to the end of which is attached
the piston l0, whichv is contained in the cylinder
The cylinder ll is 'trunnioned at 62 on the
back of‘ the column II, for free oscillation in ac
cordance with the movement of the pivot 58
about the shaft II. It will now be evident that
ii‘ pressure is admitted to the lower end of cyl
inder ii that the pattern support 45 will move 55
away from the tracer support, and that if pres
sure is admitted to the upper end of the cylin
feeding mechanism which is automatically con
trolled by the tracer; and the indexing mecha
der, the pattern support will move toward the
tracer support. For thepurposes of description,
nism by means of which the tool and work are
the movement of the pattern carrier 45 will be 60
relatively indexed after. each cutting stroke.
Mounted on opposite sides of the. control unit
are a plurality of cutting units 21, 28, 2s, and 30.
For illustrative purposes there is shown two cut
65 ting units on each side of the central control
unit, but ‘this number may be increased __or de
creased -as desired, or the cutting units may be
mounted all on one side or the other of the con
referred to as the "in and on " movement.
Referring to Figure 5, each cutting unit' con
sists of a‘ column member 3|, which is similar
to. that shown in Figure 3, for supporting upon
one vertical face a bracket 63 which is trunnloned
at N. This bracket is connected by a link 85
to a crank Bl integral with the shaft 38. A cutter
spindle 61 is journaled in a quill 68 carried by the
trol unit, without departing in any way from the bracket 68, and the other end of the spindle pro
jects beyond its bearing so that it may be pro
70 principles of this invention.
Referring to Figure 3, the control unit 26 con
vided with a pulley 88'.
sists of a column II which is ?xed with the bed
- This pulley is connected by a belt 89' or other
25, for pivotally supporting on one vertical face motion transmitting band, to a two step pulley
a tracer control unit 22. This unit is trunnioned . 69 secured to-the armature shaft of an electric
v75 at 23 to the column, and actuated by a link It 'motor II". It will be noted that the motor is 75
It will he noted E
shaft as that shown in lligure 3,
extends longitudinally for the full length of the
machine, so that all of the cutter spindle brackets
may be operatively connected thereto tor ‘simul
taneous actuation thereby. Therei’ore the hy
draulic motor consisting of the piston and cylin
der 4! and II
15 common motor for electing a
of all of the cutter spindles.
Bach cutting unit also includes a swinging car
rier ‘II, in which is mounted a work support and
bill III.
this carrier is supported and operated in the same 'llllA atubular
connecting member III is tightly
manner, as the carrier 4| shown in figure 3. In
in an axial bore ill’ formed in the end of
other words the carrier ‘II is pivoted at ‘H to ?tted
the bed II and guided at 12 in an overhanging the shouldered member 11 which is supported by
diaphragm II. The other end of the mem
bracket 13 projecting from the column Ii._ This the
engages the end oi the tracer control
carrier is also connected by a link ‘I!’ to a crank valvell!
plunger I”. the valve plunger being held
arm 13 which is integral with the shaft '1. As
in engagement with the end of member III by a
seen in Figure l, the shaft l‘l extends longitudi
nally throughout the length of the machine and means of a spring Ill.
The valve member II! has a central or neutral
serves as a common actuator for moving the work position
which during the cutting‘ stroke, it
supporting carriers toward and from the cutting holds theinpiston
ll against movement; a second 30
of this neutral position in
Tracer control mechanism
which it causes movement of piston l. in one
direction; and a third position on the other side
The tracer control mechanism is more partic
ularly shown in Figures 8 and 27 of the drawings,
in which the reference numeral 14 indicates the
tracer head which, as more particularly shown
in Figure 3, is secured to the tracer control unit
32. This head has a tubular opening ‘II in which
is fitted a sleeve 1|, the sleeve having a threaded
portion l'l adapted to interengage threads 18
40 which are out on the interior of the housing.
The sleeve 18 supports the tracer arm ‘II for uni
versal movement in the following manner. .The
tracer arm has an enlarged portion 8. which
serves to form a shoulder Ii. Against this shoul
45 der there is placed a thin metal diaphragm 82,
and against that is placed a metal disc ll, which
has a boss ll formed integral with one side, which
serves as a separator between the disc and the
of said neutral position in which it causes move
ment of piston II in an opposite direction. By 35
'means oi’ this arrangement it is possible for the
tracer to control the "in and out" movement of
the pattern and work supports automatically dur
ing the cutting stroke.
It is desirable, of course, that when the tracer 40
is out of contact with the pattern, that the valve
plunger I" be in such a position that it will
cause the pattern and work supports to move to
ward the tracer and cutters.
Therefore the spring ill‘ should be su?iciently
strong to urge the valve ill and de?ect the dia
phragms l3 and 8! to the left as viewed in Figure
8. a sumcient amount so. that the valve I" will
cause a ?ow “of ?uid to the cylinder Si in such a
manner that the piston 6| will cause the correct
diaphragm. A nut II is threaded on the tracer
arm ‘I! and serves to clamp these parts against direction poi.’ movement of the connected sup
the shoulder II. A ring 86 surrounds the disc ports. 'lhis will make it possible when the tracer
and diaphragm and this ring has an internal ‘engages the pattern for the pattern to move the
annular projection I‘I which is of the proper tracer arm to the right, as viewed in Figure 8, a
thickness to fit between the opposing faces of the sui’ilcient amount to take the de?ection out of the 55
65 diaphragm and disc and act as a illlenblock and diaphragms'and move the valve ill! to a central
also as a support against which the diaphragm position. From this it will be apparent that upon
may be clamped. The ring 88 has a face I! which assembly of this tracer mechanism, the connect
abuts against the end of the sleeve ‘II and- this ing arm II! should be of such length that when
face is so spaced‘ from the shoulder ll that a the diaphragms I! and II are unde?ected, that
clearance space 80 is provided between the oppos
the valve ‘Ill! will be in its central or neutral
ing faces of the disc and the end of the sleeve position.
The tracer control valve consists of a valve
10. The parts so far described may be assembled
upon the tracer arm ‘I9 and then insertedin the body I I! in which is formed a‘bore illi. Mount
end of the sleeve ‘ll after which they may be ed in this bore are a plurality of discs lil'l of vary 65
clamped in place by the member SI which is dish ing thickness,.some of which are provided with
shaped so as to provide a narrow annular face
which will engage the periphery of the diaphragm
l2 and clamp it against the ring 86. The clamp
ing bolts 92 pass through clearance holes in the
disc and diaphragm and are threaded in the end
of the sleeve 18. .From this it will be seen that
the tracer arm ‘ll is supported by the diaphragm
It. When the tracer is de?ected, some point on
the periphery of the disc 8! acts as a fulcrum
annular shoulders on the end face or faces, and
radial slots, so that when they are all assembled
in the bore I08 they serve to form ?ve annular
grooves or ports ill, in’, III, III and H2. The
valve plunger I03 has a ?rst annular groove III
which is of such length that when the valve is
in a neutral position it will only extend to the
edge of ports ill and H0 so that both of these
ports are closed with respect to port ill; and a
that it interconnect. port III with port III
‘ 8,111,”,
wherebyupcninovementofthe-valveplungerlll preventingthelamefromliftingduringtheeut.
Themoldisclampedinpositionby meansoi'a
"Yin eitherdiiootion from its‘ neutral Podium it
'wlllrestrictthefiowfrcmport III toport Ill,
byclosingoneortheotherof theseports de
pendent upon the direction of movement.
Since this machine is a precision machine, a
precaution is taken against ilne particles of dirt
10 or other foreign matter impeding free movement
of the valve. by providing means for constantly
rotating the valve. This also aids in preventing
the valve from sticking due to inequality in the
lateral pressures on the valve at the various points
15 opposite the diiferent ports. By continuously ro
tating the valve. a thin film of oil around the
valveisassuredwhlch actsasaiubricant topre
vent sticking. The valve rotating means con
sists of a small fractional horse power electric
motor III which is supported on a frame ‘III
secured to the end of the valve body Ill. and
within this frame is antifrictionslly iournaled.
a worm wheel I", which is driven by aworm Ill
secured to the end of the armature shaft of the
The worm wheel is supported in axial align
ment with the valve plunger III, and is mount
ed on a sleeve III which has an enlarged head
III. The valve plunger III has a diaphragm
III secured to the end of it, and this diaphragm
has a pair of diametrically opposed ears which
engage in slots formed on a ?anged portion of
the head I20 whereby rotation of the head will
cause rotation of the valve without interfering
with its longitudinal movement. The spring Ill
cllmpinslcrew Ill whichisthreadedthrougha
. 17, has ears I“ at each end which project into
vertically extending rectangular slots in formed
in the frame I“. In order to hold the bracket III
in any given vertical position. the bracket III is
Provided with an upstanding lug iel'through 10
which is threaded a set screw III, as more particu
larly shown in Figure 'I. This set screw tends to
shift the bracket III laterally of the frame III
and thereby hold it in the position by wedgins the
same between the sides of the frame I24. It will 15
be apparent that the specific details of the fix
ture may be varied in accordance with the size
and shape of the molds to be reproduced, but in
principle the fixtures provide a vertical locating
surface against which the parting face of the 20
mold may be clamped and means in back of the
mold for clamping and holding the mold against
this locating surface together with means to pre
vent the face of the mold from separating due
to the fact that the mold is somewhat semi-cy
lindrical in shape and the clamping force applied
to the mold is in such a direction and in such a
position that it might cause a certain amount of
The hydraulic tracer control circuit
This machine is hydraulically operated and in
Figure 19 there is shown a diagram of the com
plete hydraulic circuit. In ‘this circuit there is
shown a stop valve I", a stop valve operating
previously referred to, is supported within the . plunger I", an- “in and out" control valve ill, a 35
sleeve lit, and a suitable member III is inter
longitudinal control valve I48, and an index con
posed between the end of the spring and the trol valve IN. All of these valves are in a position
valve, to transmit the pressure thereto. An ad
40 lusting screw I23 is threaded in the end of sleeve
‘I II to vary the tension of spring Ill.
Pattern and work supports
The pattern and the work are supported in
45 ?xtures which are identical in construction and
therefore a description of one will sumce for all.
Referring to Figures 3, 8, '7, 9 and 17, the ?x
ture itself comprises a rectangular frame I“
which, as shown in Figure 6, is provided at the
50 top with a. rectangular guide surface I26 and at
corresponding to rapid traverse movement of
the cutter and tracer downward to a starting 40
position. During this movement all of the va
rious carriers are moved out so that the work
pieces are out of engagementswith their respec
tive cutters and the pattern is out of engagement
with the tracer. This means that the tracer 45
control valve plunger I03 is shifted to the left
of its neutral ‘position as viewed in Figure 19
by the spring Ill. During-this rapid traverse
movement, the piston 80 which controls the “in
and out" movement of the carriers remains sta 50
tionary, and the piston ll moves rapidly toward
the left ‘as viewed in Figures 3 and 19 to there
the bottom with a guideway I25. This permits
movement of the frame relative to its support
ing cradle I21 which has a top trunnion I28 and ~ by move the tracer and cutter downward to a
a bottom trunnion I28 whereby the cradle may starting position. This movement is e?ected by
55 swing relative to the frame. By mounting the
the "longitudinal" pump Iii assisted by the 55
cradle I21 for oscillation about its trunnions rapid traverse pump I52.
"8-128 makes it possible to index the pattern
The pump Iii has an intake I53, by which
and ‘work after each cutting stroke.
?uid is drawn through a strainer I" from a res
The rectangular frame I“ is provided with a ervoir I"; and a delivery pipe I56, which is con
pair of vertically extending T-slots Illl, Figure 9, nected to port I51 of the stop valve I45. This
by means of which a pair of cross bar supports valve has another port I 58, which is connected
Ill and I3! may be secured in various vertically by channel I59. to the small end of piston 43.
adjusted positions on the frame. The lower Since the same unit pressure of the pump is act- '
cross bar I3I has a horizontal surface In upon ing on both ends of piston 43, and since one end
65 which the pattern or work, represented by the
is larger in area than the other, the piston 43 will
dot-and-dash line I“, is supported; a pair of move to the left as viewed in Figure 19, whereby
vertical surfaces I" against which the mold is the ?uid in the left end of cylinder 42 will be
clamped to lock it relative to the axis I" about returning through channel I59 to port I58 of
which the cradle swings; and a second pair of the stop valve. In other words, there will be an
vertical dove-tail surfaces II‘! which engage the incoming ?ow through ports I51 and I I! which
sides of the mold to prevent spreading thereof will combine in the annular groove I60 formed
when the same is clamped.
in the stop valve plunger I46. This combined
The top cross bar III is provided with a verti
?ow will continue through channel IBI to port
cal surface I” against which the face of the III of the "in andout" control valve I“.
.75 mold is clamped and a plurality of adjustable set
This valve has a plunger I", in which is
formed an annular groove I84, which, in the)»
sition shown, connects port I82 to port I85. This
port is connected by channel I88 to port I81 oi’
the "longitudinal” control valve I48. In the po
sition of the plunger I88>of this valve, an annular
groove I88 connects port I81 to port I18. The
port I18 is connected by channel "I to the right
hand end of cylinder 42. It will now be seen
that the ?ow from pump III and the ?ow from
10 the left end of cylinder 42 is combined in the
stop valve, and will ?ow through the interconnec
tions Just mentioned to the right hand end of cyl
inder 42.
This ?ow is further increased by the rapid
15 traverse pump I52, having an intake I12,
through which ?uid is withdrawn from reservoir
I55 through a strainer I13, and a delivery chan
nel I14, which leads to port I15 of the “longitu
dinal” control valve I48. At this time the port
20 I15 is connected by annular groove I18 to port
I11, which in turn is connected by channel I18
to port I18 01' the “in and out" control valve I48.
The plunger I83 has a second annular groove I88
which is of su?icient length that the port I18 is
25 interconnected with the port I85.
It will be noted that it was through this port
?uid will then flow through channel I88, inter
connected ports I84 and III of the double throt
tle valve I88, channel I81, annular groove I88
of the “in and out" valve I48 which is connected
by channel I88 to port 288 of the index 'control
valve I88.
At this time the port 288‘ is connected by an
annular groove 28I formed in plunger 282 of this
valve to port 288. A channel 284 connects this
port to port 285 of the "in and ou"” control 10
valve I82. Plunger I83 01' this valve has an anw
nular groove 288 which interconnects ports 285‘
to port 281 so that the ?uid continues to flow
through channel 288 into the right hand end of
cylinder 288 in which is slidably mounted the 15
plunger I41. When this happens, the plunger
I41 is shifted to the left against the resistance
of spring 2I8‘ and thereby actuates, through the
crank 2| I, the stop valve plunger I48, and
shifts the same to the right thereby closing port 20
I58, and preventing the escape of ?uid from the
left end of cylinder 42. This will act as a sort
of cushioned stop to the movement and if a high
pressure builds up in the delivery channels of
the various pumps, the emergency relief valves 25
2I2, 2I3, and 2I4 associated with the respective
that the combined ?ow from pump I5I and the * ‘pumps will open.
left end of cylinder 42 passed. And it is at this
port that the flow from the rapid traverse pump
30 is combined with this previously mentioned ?ow
to increase the total volume delivered to the
right hand end of cylinder 42 and thereby cause
rapid traverse movement of the contained piston.
It will be noted that the channel I18, which
35 interconnected port I 11 of the “longitudinal"
control valve I48, with port I18 of the "in and
At the end of the rapid traverse movement, a
trip dog 2I5, which is shown in Figure 3 as se
cured‘to a T-slot 2I8 formed in a depending 30
bracket 2I1 of the tracer support 32, actuates a
trip lever 2I8. This lever is pivotally supported
at 2I8 by the column, and has an integral crank
228 which is connected by a link 22I to a crank
222 secured to the lower end of rod 223. As more 35
particularly shown in Figures 11 and 25, a crank
'out” control valve I48, has a branch line I8I to ,. arm 224 secured to the upper end of this rod en
which is connected the delivery‘channel I82 of gages an upstanding lug 225 formed on a valve
the "in and ou " supply pump I83. This pump
shifter 228 which is supported for free rotation
also has an intake I84 for withdrawing ?uid relative to the shaft 223. It will be noted that 40
through a strainer I85 from‘ the reservoir I55. there is a certain amount of lost motion to be
The channel I8I terminates at the port I82’
formed in one end of the "in and out” cylinder
8|. This-will not cause movement of the con
taken up before the crank 224 engages the lug
225. When this lost motion is taken up the
shifter 228 is rotated a suf?cient amount to cause
45 tained piston, however, because the other port
the spring pressed detent 221 to rideover the peak 45
I83’ of this cylinder is connected by channel I84’
to interconnected ports I85’ and I88, and chan
nel I81 to port I88 of the “in and out" control
valve I83, which port is closed at this time by
50 the spool I88 on the plunger I83.
Since the delivery from pump I83 cannot cause
any displacement of the piston 88 in the cylinder
8|, the practical result will be that the delivery
from this pump will pass through channel III
and combine with the delivery from the rapid
traverse pump, which is now ?owing through
channel I18 and to which channel the line I8I
228 formed on a notched plate 228 integral with
the shifter whereupon a spring 238 will cause
the detent lever 221 to complete the movement
of the shifter. This constitutes a form of load
and-?re mechanism for actuating the shifter 50
member 228.
Referring to Figure 25, it will be noted that
the shifter 228 is provided with two actuating
arms 23I and 232, the former of which has a
pin 233 inter?tting in a notch formed in the end 55
of the index valve plunger 282 and the latter
having a pin 234 interfltting in a notch formed
in the end of the “longitudinal" valve plunger
three pumps I5I, I83, and I52 combine to cause - I88. Therefore when the trip lever 2I8 is thrown
60 the rapid downward movement of the cutter and
by the "dog 2I5, both the “longitudina " valve 60
tracer supports.
plunger and the index valve plunger are shifted
Attention is invited to the fact that the chan' to the left, as viewed in Figure 19. The effect
nel I8I through which the delivery from pump of this is to stop the rapid traverse movement
I83 is ?owing, has a branch line I88 which is of the cutters and tracer, initiate an indexing
65 connected by sub- ranches I8I and I82 to ports
movement of the work and pattern, and also 65.
H8 and III of t e tracer control valve. Since to initiate an inward movement of the pat
this valve is to the left at this time, it closes the tern and work toward the tracer and cutters.
sub-branches I8I and I82 so that no ?uid will This is brought about in the following manner.
- be escaping therethrough. It is possible, how-1
When the valve plunger I88 is shifted into its
ever, to connect the port I8I in case of emergency left hand position, it establishes three new con 70
to the stop valve operating plunger I41. In nections. First, it interconnects port I15 with
other words, during this rapid traverse move
port 235 whereby the rapid traverse pump is dis
ment, if the tracer should hit a foreign obstruc
connected from the actuating cylinders and con
tion and thereby shift the valve I88 to the right, nected to the reservoir line 238. This discon
the port "I will be connected to port I88 and nects the rapid traverse pump from the entire
is connected.
From this it will be seen that all
sumac -_
circuit. Secondly, it disconnects port I'll from
port I91. thereby cutting 01! the pump supply
to cylinder 12 which was causing the rapid trav
erse movement; and it interconnects port I'll
by causes rotation of lever arm Ill,
This lever arm is connected by a long link. 291 >
to a lever arm Ill, Figure 3, keyed to the upper
end of a vertical shaft 299. This shaft. as'shown
in Figure 11, has a short lever arm 219 secured
thereto and sequen?ail! ensasins ms: 2'" and
nected to port 299 of the double throttle valve ' 212 integral with detent plate I'll. It will be
I99. A tapered spool 249 formed on the plunger noted that there is a certain amount of lost mo
2“ of this valve, serves to interconnect port 299 tion between the lever. 210 and the lugs, whereby
upon rotation of the lever arm in either direc 10
10 with port “2, which in turn is connected by
channel ,2“ to port I“ of- a secondary control tion, the spring pressed detent I" will be caused
to ride over the peak ill formed in the detent
valve 2".
The secondaryv control valve has a pressure plate and thereafter automatically complete the
' with‘ port 231.
By means of channel 2-39, the port 291 vis con
port I“ which is connected through an hydraulic _ movement. This mechanism constitutes a load- '
and-fire mechanism for actuating the “in and 15
15 resistance 241 and branch line I“ to the delivery
channel I" of pump Iil. It will be noted that out" valve similar to the one described for actuat
the pump Iii is connected directly to one end ' ing the longitudinal control valve.
The detent plate 219 hasa pin 218 which en
of cylinder 42 and through the hydraulic re
sistances 2" and tapered spool 2", which also gages a notch formed in the end of the "in and
on ” plunger I93 automatically‘ shifting the same. 20
20 causes a drop in pressure, to the other end of ‘
cylinder l2.v The'hydraulic resistances 2i] and When the dog 263 actuates the trip lever 264 as
“Il cause a sufficient drop in pressure in the just described, it causes rotation of the detent
?uid supplied to the large end of piston ‘9, that plate 219 in a clockwise direction as viewed in
the total resultant. pressure on the large end of‘ Figure 11, and thereby shifts the valve plunger
the piston is equal to the total resultant pres - I63 to the left as viewed in Figure 19.
In this new position of the valve plunger I99,
sure on the other end, whereby no movement of
the ports I65 and I92 are disconnected i'rom one
the piston takes place and therefore the down
ward movement of the tracer and cutters must another, and the port I19 is interconnected with ,
port I88. No result follows at the present time
The third or last connection effected by plunger
I89 is the intercoupling of port I95’ with port
I99, whereby one end of cylinder BI is coupled to
reservoir. This is true because the line I91 lead
ing fromport I9! is connected to port I95 of
35 the double throttle valve I96, and due ‘to the
position of the tapered spool 250, port I9! is inter
connected with port I94. As previously described,
this port is connected by channel I93 to port
,III9 of the tracer valve, and since the tracer
40 valve at this time is in its left hand position, the
port III! is interconnected to port I" which
leads to reservoir. Since the other end of the
cylinder BI is directly connected through chan
nels |9I and Ill to pump I83, the piston ill will
45 be moved rapidly in a direction to swing the
carriers 45 and ‘II in toward the cutters and
because the port I99 of the "longitudinal" valve
to which the port I99 is connected by channel
I91, is closed and therefore this becomes a dead
line for the present.
During this movement of the tracer valve
plungenit will be apparent that the reservoir
port III! will gradually be closed so that the
channel I93 through which the exhaust ?uid
from the large end of cylinder BI is ?owing to
reservoir will be blocked and when the port Illl
is completely closed, the inward movement of
the tracer and cutters will be stopped. During
this same time the port III is gradually being
opened to thereby connect the pressure port III
to channel 219. The channel 219 is connected
to the left end of cylinder 245 whereby the pres
sure from pump I83 acts directly on the end of
the contained plunger 299 and tendsto shift the
The index valve IIII has a pressure port "I I same toward the right.
which is supplied from a separate pump 252
throughv channel ill. when the index valve
plunger 29! is shifted to the left as previously
mentioned, it interconnects the port III with
port "2 whereby the ?uid will ?ow through
I channel 259, feed-stop valve Ill, and channel 255
The movement is re
strained by a ?exible diaphragm 28L The move
ment, however, is sumcient to connect port 292 50
which, up to this time, has remained closed, with
port I".
The port 2“ is connected at this time, as
previously described, with the right hand end of
cylinder 42 and since the other end of the cylin 55
to port iii of cylinder 2". A piston 259 con
tained inv the cylinder actuates an indexing
mechanism (the speci?c' construction of which
will be described later), which in turn will index
the work and pattern a predetermined amount
nection permits the ?uid from the right hand end
of cylinder ‘2 to return to reservoir through
channel!" which results in an upward feeding
so that a new portion of the work will be pre
movement of the‘ tracer and cutters. It will be
der is under pressure from pump I5I, this con
apparent ‘that .the rate of this movement will
depend upon the amount that the port .292 is
251 will pass through channel 259, feed-stop valve ' opened, which, ‘in turn, will dependupon the
254, channel 290, port’ "I of the index valve, amounts that the ports III and II! are opened,
which is now connected to port- 292, and then to which is dependent upon the position of the tracer
sented to the. cutters on the next cuttingstrolre.
The ?uid escaping from the. other end of cylinder
the return line I". '
It will now. be apparent that the downward
movement of the cutters and tracer has been
stopped, the indexing. movement has been ei
'70 Iected, and the carriers 45 and ‘III are swinging
valve plunger Ill.
. The ‘maximum amount of opening of the last
named ports will correspond to the central posi
tion of the tracer valve plunger Ill, because
movement to either side of this central position‘
inward toward the cutters and tracer. .
' Shortly after this inward movement starts, an
will cause a partial closing of either one or the
elongated dog 269, Figure 20. mounted on the
will thereby interpose a resistance to ?ow and a
consequent drop'in pressure in channel 219. It
carrier" and moving toward the right as viewed
I‘ in this figure actuates a trip lever 294 and there-~
other of ports III and lli'respectively. which
will now be apparent that the tracer is capable 7‘
of controlling the rate of: the upward i'eeding
‘r movemenhandthatwhenthetracermovesirom
will continue until the work piece or pieces have
been nnished.
In order thatthe work pieces may be readily
removed, it is desirable that the carriers move
further back from the tools than during the cut 5
tion it willeause an inward or an outward move
ment of the carriers 4! and ‘II, dependent upon ting operation. To this end on the last outward
whether the pressure port III is connected to stroke of the carriers. the operator swings the
channel III or whether the exhaust port ill is member ill, Figures 20 and 21, by means oi
the handle ill about the pivot 28! so as to.
connected thereto.
Itwillbe notedthat theports ill and li2will remove‘ the shoulder Ill from the path of‘the
causeadropinpressureinthe ?uidiiowing to shoulder ill on dog I”. These parts may thus
channel Ill, and thus they constitute a form of pass one another. and the carrier will continue
hydraulic resistance. with the result that. the its outward movement until a second dog 29!
attached to the carrier engages trip lever 283.
channel I'll constitutes a form 0! chamber-‘hav
To prevent interference, the dog 29! has an L 15
15 ing a resistance "in" and a resistance “out". If shaped projection 294 which extends to the other
these resistances remain unchanged, a constant
pressure will exist in the chamber. In other side of the T-slo't plate 295 so as to be in the
words, it the hydraulic resistance 2“ were not plane of the trip lever 29!. This lever is sup
ported for tree rotation on a shaft 296 and has
provided, the pressure in channel 219 would even
tually build up to the pressure in channel I" an arm 281 engaging the bifurcated end I" of 20
regardless oi' the resistance of ports ill and H2 link 29!. A spring "ll continuously urges the
and no control over the position of plunger 28!! link and army 281 in a counter-clockwise direc
tion and a pin "I is positioned to limit this
would be possible.
At the end of the upward cutting stroke a trip movement.
As shown in Figures 3 and 26, the link 2" ex 25
dog Ill, shown in Figure 3, actuates the trip
lever Ill, and thereby shifts the interconnected 4 tends to a bracket 302 for operating a lever 303.
lower end of this lever is partially cut away
valve plungers' I68 and 202 to the right or in The
to form a projecting lug 3“. The end oi’ the
other words. into the position in which they are link I" is ?attened and a portion of it cut away
shown in Figure 19. This results in the inter
to form a shoulder 305 which is adapted to en 30
connection of ports I86‘ and it!’ so that the gage the lug 3M and cause rotation of the lever
pump I” can now deliver ?uid coming through 30! in a counter-clockwise direction. Upon actu
channel I81 to port Ill’ of cylinder Ii, and ation of the trip lever 293 by the trip dog in a
since the pressure on the large end of piston 60
clockwise direction, the link 289 moves toward
is now greater than the pressure on the small the right and swings the lever 30! and its sup 35
‘end, the carriers 45 and 10 will immediately porting shaft 306 to which it is keyed in a counter
clockwise direction. The lever llll extends above
start to move outward. The rate of this move
ment will be rapid because the rapid traverse the shaft "8, Figure 24, and is connected by
pump III is interconnected at the same time by means of a pin Sill to a second lever 3" supported
the annular groove "8 in plunger I68 to channel for tree rotation on the shaft 306 and the lower 40
I'll which thereby increases the volume of ?ow end of this lever is pivotally connected to the bi
furcated end of link 309. This link is connected
acting on the large end of piston 60.
The shifting of plunger I" to the right also by a crank Bill to vertical shalt 3| I, which shaft,
disconnected the port "I from port 281, so that as shown in Figure 11, has integrally connected channel I'll which leads from the right hand and thereto a lever 3|! which has a wide notch Ill 45
of cylinder 42 and through which exhaust ?uid cut in the end thereof. This notch is suillclently
was passing to reservoir during the cutting wide to provide a lost motion connection with a
pin 3“ ?xed in the detent plate iii.
stroke, is now connected to a dead line I88 where
This plate has two V-shaped notches lit and
by upward movement of the tracer and cutters
ill cut in the edge thereof but of diilerent depth 50
Shifting of the index valve plunger 2" to the so that the intervening peak Ill is unequally
right interconnected pressure port Ill to port spaced with respect to the bottom oi’ the notches.
“I which thereby caused ?uid to ?ow to the The reason for this is that it is desirable that a
lower end oi’ the index cylinder 2" resulting in small rotative movement be given to the parts in
order to shift the stop valve to its stop position. 55
a repositioning movement 01' the index mecha
55 nism preparatory to moving the pattern and Since this valve is also used for emergency stops
work another small amount dependent upon the by means oi a manual control lever, it reduces the
amount of material it is desired to remove on length of movement that must be given to the
the next cutting stroke. The carriers continue lever, and makes it possible for the operator to
their outward movement until a shoulder 286, very quickly stop the machine in case of emer 60
Figure 21, formed on the dog 28!, engages gency. A spring pressed detent 3|! is provided
shoulder 281 formed on the member 2“. for automatically completing the movement
This member is pivotally connected by a pin I" whereby the mechanism acts as a load-and-i'ire
to a rectangular portion 290 formed integral with mechanism.
The pin Ill, whichis integral with the plate
the trip lever I“. This results in the shalt 165},
which supports these parts, being rotated to iii, projects through the other side of the‘ plate
cause shifting of the “in and ou " valve plunger
into a slot formed in the end of the stop valve
I" to the right or into the position shown in plunger Ill for shifting the same. It will be
its central position in either direction it will
decrease that rate of ieeding movement. In addi
Figure 19.
noted that the lever arm 2“ which is actuated
by the hydraulically actuated stop plunger I", 70
The eitect of this is to stop the outward move
70 ment of the carriers by disconnecting port I”
is integral with the plate 3|! and that the pin
from pressure I19 and also results in a‘rapid
traverse downward movement 01' the tracer and
32! mounted in theendof the lever II I has a lost
motion connection with the slot HI formed in the
end of plunger Ill whereby stop valve may be
The circuit is now conditioned to re
peat the cycle just described and the repetitions
shifted to its stop position without interference 75
from the hydraulically actuated stop plunger I".
For manual operation, a hand lever 222 is se
cured to the shaft ill, and they lower end of this
leverhas a pair of spaced projecting lugs "land
224. These lugs are positioned to engage opposite
sides of the lug. 804 which prolects from the lever
202. The wide spacing permits the link 2|! to
throw the lever 20‘ without interference from
the lever 322. The shaft Ill extends the full
10 length of the machine, as shown in Figure 2, and
true circle, as represented by the line)”, it is
apparent that the angle Ill could remainthe
same throughout the entire machining operation
and a uniform feeding, movement would be
effected at each inde?ng. In other words, an 5
operating plunger could be geared to the work
support-and,taking into consideration the ratio
of the connecting. gearing, it could be very readily
determined what the length of stroke of the
plunger should be to e?ect this unit index angle.
is provided with additional operating levers, such _
Fbr irregular shaped bottles,'such as repre
as the one, 304, shown in Figure 5, whereby the ' sented by the outline 82!, this procedure will not
operator may stop the machine from any one of
a number of stations about the machine.
other words, upon rotation of the shaft "I by
any of these stop levers, the lug 324 on the lever
322 will be moved into engagement with the lug
304 on the lever 303 and rotate the latter in a
direction to cause shifting of the stop lever to its
20 stop position. Upon rotation of the lever 222 in
an opposite direction, the lug 222 will shift the
lever 303 in an opposite direction and move the
stop valve to a starting position. Thus the ma
chine can be automatically stopped by the trip
25 dog 292, but can be started only by manual actué
ation of the lever 303.
Indexing mechanism
As previously mentioned, a constant angle of
30 indexing will not produce a uniform cross feed as
measured along the surface of the work due to
variations in the length of the radii of the various
points on the periphery of non-circular bottles.
.This is obviously true because the opposite side
35 of an angle increases in length} with increases in
length of the hypotenuse and in spite of the fact
that the‘ proportion between the side and the
hypotenuse remains the same. Therefore, the
longer the radius, the greater will be the length
40 of the cross feed for the same angle of index.
practical reasons, in this machine it is ‘desirable
that the length of each indexing movement or
cross feed as measured along the surface of the
work be substantially uniform, which means that
45 the opposite side of the angle must be kept uni
apply because the angle of index must be varied
in accordance with the length of the radius of the
point of the surface being worked upon. This 15
angle can be varied by varying the stroke of the
plunger, and mechanism has been provided
whereby this is automatically effected for each
indexing movement. To this end, an outline con
trol cam 222 is provided as shown in Figure 14, 20
which is keyed to a shaft 323 anti-frictionally
.journaled in the carrier II and connected by
bevel gearing I“, Figure 6, to a tubular shaft “I.
This shaft is anti-frictionally journaled in the
carrier ll and carries a base plate at forming
_ part of the swinging frame I21. The lower end
of thisvshaft is connected by a worm gear 231
and a worm "I to a shaft Ill which extends the
full length of the machine and provided with
similar worms for actuating worm gears con
nected to the individual operating shafts, which
rotate the various work holders, as shown in
Figure 3.
The shaft 320 has a gear couplet fixed thereto
comprising the spur gears 34! and “I which may
be selectively interchanged by spur gears "2 and
242 respectively slidably mounted on a spline
shaft 2“. The shaft 2“ is connected by change
gears Ill and I“ to a second shaft 241 which is
mounted in the carrier ll in parallel relation
with shaft 3“.
Referring to Figure 15, these parts are actu
ated by a piston 25! which is slidably mounted in
cylinder 2", previously referred to in ‘the de
scription of the hydraulic circuit shown on Fig‘
ure 19. The piston rod 3“, which is connected
to the piston 28!, has rack teeth 2“ formed on
form. and this can only be done by changing the
size of the angle in accordance with changes in
the length of the radius.
one side which interengage with a pinion "I.
For purposes of explanation, an assumed stand
The piston rod also has connected thereto a pro
50 ard length of cross feed may be arbitrarily chosen jecting lug "I which is adapted to engage the
and by also choosing a standard length of radius, periphery of a stop cam I52.
it can readily be determined through what angle
The pinion 350 is moimted for free rotation on
the radius must be moved to produce the arbi
shaft I" which is journaled in the carrier frame.
trarily chosen length of feed. For convenience, The pinion I" has integrally formed therewith
55 ‘this radius may be equal to the average of the a ratchet wheel I" which, as shown in Figure
longest and shortest radii which can be produced 12, will be rotated in a counter-clockwise direc
in the machine. For example, referring to Fig , tion upon downward movement of the plunger
ure 23, let R equal the length of the longest ra
"I. A pawl carrying plate III is keyed to the
dius, and r the length of the shortest radius, then shaft 3" in adjacent relation to the ratchet
wheel and is provided with four pawls 2" which
are pivotally attached to the plate and held into
engagement with the ratchet teeth by means of
spring pressed plungers Ill. It will be noted that
In this ?gure, the line as may be assumed to the teeth point in such a direction that upon
65 represent the outline of the surface to be cut in a counterclockwise rotation of the ratchet wheel.
mold; the line 821 to represent the parting line it will engage :ne of the pawls and cause rota
of the mold; and the center 22. to represent the tion of the plate 2" and connected shaft 241 in
axis about which the mold is indexed. The as
the same direction, and that upon clockwise rota
sumed standard distance of ‘index feed is repre
tion, the ratchet teeth will ride under the pawls
70 sented by the numeral 329 as measured alonglthe without causing rotation of the plate,
circle as, and from this it will be apparent vthat
As shown in Figure 10, the plate 2“ has in
the radius R‘, or in other words the mold, must tegrally connected therewith a‘ second ratchet
be rotated through an angle indicated by the wheel 2", the teeth of which point in an oppo
reference numeral "I in order to e?ect this unit site direction to those on the ratchet wheel 3".
75 feed distance. If the outline of the mold was a A second pawl carrying plate I" is mounted in
adjacent relation to this M named ratchet
wheel, but thisplate is held against rotation W
a pin are, as more particularly shown in ligin'e
6. Theresultisthatduringtheciockwisere
tact with the periphery of the cam III. The arm
III of ‘the bell crank has a slot 88] formed lon
gitudinally thereof in which is sdiustably mount
ed a block ill carrying a pin 8" forming a
turn motion of the ratchet wheel "8, the pawls . pivotal connection with a feed setting lever 8“.
“I on plate III will engage the teeth on ratchet The lever m is pivotally connected at Ill to
wheel Ill and prevent any return movement of the stop cam SI! and is movable therewith. The
lever Ill carries a clamping bolt I" which passes
shaft 841 during the upward or ratcheting move
through a slot 801 which is circumferential with
ment of actuating plunger Ill.
The gear couplet "IA" is shifted on the . respect to center of pin Ill. so that the arm
spline shai’t I“ by a shifter fork Ill which is I“ may be swung about this center and may
slidably mounted on a supporting spline shaft be clamped in any one of several positions by
III. An operating shaft "3. which is actuated the clamping bolt III. The stop cam III is piv
otally supported on the carrier for free swing
by the handle 8“, shown in Figure 2. has an ec
centric pin "I on the end which engages a slot ing movement about the pin Ill. and this move
ill formed in the shifter fork in such relation ment is controlled by the bell crank I'll through
that the handle "I may assume three di?erent its pivotal connection with the pin Ill. It will
positions, in one of which the gear 843 is in mesh be noted that the center about‘which the stop
with the gear Ill; in a second of which the gears cam moves is in the axial plane of the plunger
20 are disengaged or in a neutral position; and in
It was stated supra, that it could be readily
a third of which the gear m is in mesh with the
gear 8“.
The neutral position which has been provided
makes it possible to rotate the shaft are manually
to return the pattern and work holders to a
starting position without interfering with the
previously described ratchet mechanism. This
manually operable means includes a sprocket
wheel I" which is keyed to the shaft "I. This
sprocket wheel is connected by a chain "I, Fig
ures 2 and 3, to a second sprocket wheel "I ilxed
on shaft 310. This shaft is connected by bevel
gearing ill to a shaft 812, which projects from
the carrier/and is provided with an operating
35 hand wheel 31!. It will now be apparent that
rotation of the hand wheel will cause rotation
of shaft 33! and thereby rotary movement of the
pattern and work carriers.
The mechanism shown in Figure 10 constitutes
the connecting gearing previously referred to be
tween the operating plunger 3" and the index
ible supports. The length of the stroke of the
plunger 8“ is determined by the position of the
stop cam ll! during the upward or ratcheting
, movement of the plunger. In other words, iluid
determined what length of stroke the operating
plunger should have to effect the unit index
angle. Since this unit index angle was deter
mined from the mean or average radius, and 25
since this angle would have to be decreased for
increases in the length 01' the radius; and in
creased for decreases in the length of the radius
in order to keep the lengthoi' index stroke‘ sub
stantially constant. the length of stroke of the
plunger. necessary to produce the unit or mean
index angle should be halfway between its mini
mum and maximum strokes, Therefore, if the
radius "I of the stop cam I", which is 45°
irom the vertical radius ill‘ and from the hori
sontal radius "I. is made of a proper propor
tionate length to effect the " mean" index angle,
then the periphery of the cam at one side of
the radius I“ may be made of a constantly in
creasing radius. and the other half of a constant
1y decreasing radius. with the result that the
stroke of the plunger is gradually shortened from
the radius 38! to the radius 8" to e?ect de
creases in the size of the index angle; and the
stroke graduallyincreased from the radius 389 45
to the radius III to eifeet proportionate increases
in the sire of the index angle.
with this as a basic set-up, and the pin "8
adjusted to make the lever arm from this pin
is admitted to the lower end of the index cylinder
2!‘! and the plunger moves upward until the lug
III engages the periphery of the cam. The
farther that the plunger is permitted to move
up, the longer will be its actuating or indexing to the center of pin 3'" equal to the armwwith 50
stroke when it moves down because the end of its respect to the center of the pin are, in other
downward movement is always the same, and is ,words, in a 1-1 ratio, it will be apparent that
determined by the set screw 814 which. as shown a‘ uniform indexing movement of the arbitrarily
in Figure 15, is in direct alignment with the end assumed length will be automatically Produced
regardless of changes in the radii of control
of the plunger 348.
It will be noted from Figure 6 that as the shaft cam III.
This arbitrarily assumed length will not, of
385 is indexed, it will effect a similar indexing
movement of the control cam Ill. The shape of course, be suitable for all occasions, especially
this cam is to be considered merely as illustrative where roughing and feeding operations are per
for one shape oi’ bottle, it being understood that formed on the same machine. and therefore
other cams having different shapes for producing means have been provided for varying it by
adjusting the feed control lever ill relative to
other shapes of bottles may be substituted there
the stop cam ill, which thereby changes the
for. The shape of this cam is obtained by mak
ing the radii of each of the points around its ratio of the lever arms of the pin a: relative
eilective operating periphery, proportional to the to the ?xed pins 311 and III. This feed lever, 65
however, eifects minute changg in the amount
corresponding radii of the bottle, and also pro
of feed up to a certain limit, but this limit is
portional with respect to the average radius pre
not great enough, and that is why the change
viously referred to.
gears 34! and'?l, shown in Figure 10, as well
A follower in the form of a roller "I is pro
vided for engaging the periphery of this cam as the shiftable couplet lib-ill have been pro— 70
70 and the follower is attached to the end of a bell vided so that large steps of feed rate changes
crank "I, which is plvotally mounted on a pin may be effected with this gearing and minute
1'". A spring pressed plunger Ill engages a changes effected with the feed rate lever III.
From an operating standpoint. it will be ap
lug 319 projecting from one arm of the ‘bell
parent that the mechanism shown in Figure 14' 75
crank to continuously urge the follower into con
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