US2429914A - Pressing machine and cushioning device for use therein - Google Patents

Description

0d 287 1947. H. G. BEI-:DE 2?/,429,914

PRESSING MACHINE ND vCUSHIONINGr*DEVTCE FR USE 'HEREIN Filed 001'.. 16', 1941 4 Sheets-Sheet 1 i?. v l

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H. G. BEE DE PRESSING MACHINE AN) CUSHIONING DEVICE FOR USE THEREIN Filed oct. 16, 1941 4 Sheets-Sheet 2 Herberteede B117 Madeg, l ./tovneg Oct. 28, 1947. 2,429,914

y PREssING MACHINE AND CUSHIONING DEVICE'FOR USE THEREIN H. G.A BEEDE Filed Oct. 16, 1941 4 Sheets-Sheet 4 fo @E om: 4 om. dm. ma. ou. mm 5 m n S mm i. o! E, o\ wo.

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In van for Herberteede Patented Oct. 28, .1947

PRESSING MACHINE AND CUSHIONING DEVICE FOR USE THEREIN Herbert G. Beede, Pawtucket, It. I., assignor, by mesne assignments, to Pantex Manufacturing Corporation, a corporation of Delaware Application October 16, 1941, Serial No. 415,243

claims. (o1. ca -40) My invention relates to garment pressing machines and includes in combination therewith a unitary cushioning device which will cushion the pressing lever on its upstroke and also cushion the pressing leveron its downstroke, preferably during the iinal portion of each stroke.

In garment pressing machines actuated by power, where cam or linkage systems have been employed to transmit the input power from the actuating motor to the pressing head, great diii-v culty has been experienced in having the pressing head travel with such velocity that unless its movement be cushioned it will tend to disarrange the garment being pressed, and great kdifficulty has also been experienced in the pressing lever coming to a sudden and abrupt stop at the end of the upstroke, making considerable noise, causing annoyance and unnecessary excessive Wear on the machine. For these reasons, in association with such types of actuating mechanisms, it has been desirable to provide a cushioning means for cushioning the movement of the pressing lever and pressing head adjacent the end of its downstroke just prior to the contact with the garment and buck and also suitable cushioning means for cushioning the pressing head during the final p0rtion of its upstroke. In the prior art, various types of cushioning devices have been employed, such as a separate cushioning device for the downstroke and a separate cushioning device for the upstroke, or complicated one or two-way shock absorbers.

An object of my invention, therefore, is to provide a, single cushioning unit which will cushion the movement of the pressing lever and head during the final portion of its downstroke just prior to contact with the buck so as not to disarrange the garment being pressed, and which will also cushion' the pressing lever and pressing head during 'thefinal portion of its upstroke. While my improved cushioning device may be also employed for cushioning other oscillatable members, particularly those which are not constantly oscillatable but which are positively moved by a separate motive power in each direction, the specific embodiment shown herein is particularly designed for use in garment pressing machines.

Further features of my invention relate to the provision of a single cushioning device comprising an oil check which will function on both the forward and backward movements of the oscillatable member, preferably during the end portion of each movement, and the means I employv to interconnect the same with the actuating means for the oscillatable member so that the oil check may be loaded and function during yeach respective stroke of the oscillatable member in each direction, the specific meansemployed preferably comprising a toggle, which on the movement of the oscillatable member in either direction will function to move from an ofi-center position to a center position with its three pivot points aligned to raise the piston 'of the oil check with an upstroke for loading purposes and will then function on the continuation of said stroke of the oscillatable member in either` direction to again move to an opposite off-center position so that the piston may actuate the flow of fluid through a restricted passage to function as an oil check during the remainder of such stroke of the oscillatable member in said respective direction.

Further objects of my invention relate to improvements in the specific cushioning device or oil check I preferably employ, which include an adjustable needle valve for thebypass orii'lce of the oil check and the provision, I believe for the first time, of a pressure relief valve or safety valve in said bypass orifice, and a specific type of spring actuated locking means for locking such an adjustable needle valve in any one of a plurality of selected adjusted positions. I

Employing oil checks of the type employed in the prior art, particularly when starting up on cold mornings, the oil employed in the oil check has become too viscous for a ready flow through the restricted bypass oriiice, resulting in breakage of parts of the oil check on such operation..

Employing my improved pressure relief valve, however, I am able to provide a device which will so enlarge the restricted orifice of the bypass as to initially permit the flow of oil of any viscosity therethrough and which will automatically return to its desired adjusted position after the oil has been heated or transformed into the desired viscosity in use, it being also obvious thatthe pressure relief valve Will similarly function if, through inadvertance, the adjustable needle valve has been left entirely closed. Inaddition, if attempts are ance with my invention, diagrammatically illustrating the functioning of the cushioning device or oil check I preferably employ and the actuating means for the same connected to the actuating mechanism for the pressing head, showing the pressing head, oil check and actuating means in the positions they assume when the pressing head is open substantially at the completion of the opening stroke of the pressing head.

Fig. 1a is a diagrammatic view illustrating the positions that the parts of the oil check assume substantially at the initiation of the closing stroke of the pressing head, the pressing head and actuating means therefor being in the positions shown in Fig. 1.

Fig. 2 is a diagrammatic side elevation similar to Fig. 1 with the pressing machine actuated to a position aligning the three pivot points of the toggle in a center position with the pressing head three-quarters closed.

Fig. 3 is a diagrammatic side elevation of the parts shown in Figs. l and 2 with the garment pressing machine actuated to move the pressing head to a fully closed position, showing the position that the parts of the yoil check assume sub-- stantially at the completion of the closing stroke of the pressing head.

Fig. 3a is a diagrammatic view illustrating the positions that the parts of the oil check assume substantially at the inception of the opening stroke of the pressing head, the pressing head and actuating means therefor being in the positions shown in Fig. 3.

Fig. i is a diagrammatic View illustrating the three positions of the toggle, oil check piston and connecting lever shown respectively in Figs. l, 2 and '3, illustrating the position shown in Fig. l in full lines, the position shown in Fig. 2 in dotdash lines and the position shown in Fig. .3 in dotted lines.

Fig. 5 is ya chart illustrating the velocity of pressing head movement without action of the oil check in dash-dot lines, the action of the oil check in dotted lines .and .the composite graph of the velocity of press member with the action of the oil check, on both the down and up strokes of the pressing head ol? the garment pressing machine shown in Figs. 1-3, the dead center position of the aligned toggle pivots being assumed, as shown in Fig. 2, at substantially three-quarters of the movement of the pressing head during its downstroke and substantially one-quarter of the movement of the pressing head during its upstroke.

Fig. 6 is an enlarged vertical sectional view taken centrally of the improved type of oil check I preferably employ, showing the oil check piston substantially .at the beginning of the downstroke thereof, and the by-pass restricting valve functioning as a pressure relief valve.

Fig. 7 is a vertical sectional view of the parts of the oil check shown in Fig. 6 substantially at the beginning of the upstroke of the piston and mounted. A pressing lever i6 is suitably pivoted as at i8 on another portion of the frame l2 having a pressing head Z mounted as at on the end thereof to be moved from the open position shown in Fig. 1 to the closed position shown in Fig. 3 in contact with said buck. It is thus obvious that the pressing head 2Q is an oscillatable member moving or oscillating forth from the open position shown in Fig. 1 to the closed position shown in Fig. 3, and moving or oscillating back from the closed position shown in Fig. 3 to the open `position shown in Fig. 1. While, as stated, certain features of my invention may be employed to cushion the movement of any oscillatable member, they are particularly designed and adapted to cushion the movement of a press ing member, such as the pressing head 2Q, reiatively oscillatable from open to closed positions and vice versa at the will of the operator.

In the garment pressing machine shown, means eiiective at the will of the operator are provided to actuate said oscillatable pressing member 20 to effect each of said closing and opening oscillating strokes. While any suitable type of means may be employed for actuating the pressing head 2t to and from positions into contact with said buck I4, I have shown a suitable fluid motor for this purpose, in the embodiment shown comprising the cylinder 2li pivotally mounted as at 26 on a suitable point on said frame aand having a piston 28 forced outwardly by fluid pressure, having a piston rod 30 connected to the input end of power transmitting means to move said pressing head.

'While any suitable type of power transmitting means may be employed, I have shown in the drawings a suitable type of linkage means 32 for this purpose. In the embodiment shown, the linkage means includes ra power applying lever 35i 'of the rst class, pivotally mounted on a :fixed point on the frame, as at 36, having a long arm 38 projecting downwardly therefrom and a short arm Ml projecting upwardly therefrom. I also have shown as part of said linkage system a second power applying lever of the first class Q2 pivotally mounted as at 44 on a fixed point on said frame I2 and having a long arm te projecting rearwardly and a short arm -48 projecting forwardly therefrom. I also provide an interconnecting link 50 pivotally connected as at 52 to the short arm 48 of said second power applying lever 42 and pivotally connected as at 5d to the long arm 38 of said rst power applying or-booster lever 34. I also provide a triangular link member 56 having the apex or upper end thereof pivotally connected as at 58 to the power arm 50 of the pressing lever It. I also provide a power transmitting link 62 having the upper end pivotally connected to the front end of the base 64 of said triangular link 55 as at 66 and its lower end connected to the long arm 46 of said power applying lever d2 by the pivot 68. Another power applying link 'lll has its upper end pivotally connected to the rear end of the base 64 or" the triangular link 56, as at 12, and its lower end connected by the single point connection 'M to the short arm 40 of the power applying lever Sii. It is thus apparent that during the outward stroke of' the piston rod 30, said interconnecting levers 34 and 42 and links 50, 5G, 62 and 13 joined together by the single point connections hitherto described function to lower the pressing head 20 from the open position shown in Fig. 1 to the closed position shown in Fig. 3. Means such as the spring v'l5 are provided to normally urge the pressing lever |6- to raise the pressing head 20 to the open position shown in Fig. l, the linkage system hitherto described functioning against the pressure of said spring to close the press and said spring means opens the press as soon as power is removed from the fluid motor 24. As stated, however, any suitable type of cam means or link means may be employed for the closing and opening strokes of the pressing head 20. If desired, in place of a prime mover or other type of motor, the actuating means for closing and opening the pressing head may be manually actuated by the foot or the hand of an operator. It is vthus obvious that in the combination to be described, said just described linkage system and fluid motor and spring comprise means eiective at the will of the operator to actuate said oscillatable pressing member 20 to effect said closing and opening oscillating strokes.

As stated hitherto, my invention also includes a device 'I8 for cushioning both the opening and closing strokes of said oscillatable pressing member 20. In the preferred embodiment shown, said cushioning means comprises the oil check means 78. Said oil check means includes a cylinder 80, a piston 82 reciprocatable therein having a check valve 84 thereon a-nd a fluid movement restricting bypass 86 connected to said cylinder 80 on opposite sides of said piston 82 beyond the limits of movement of said piston 82 in each direction. v

As stated, my invention includes in combination with the oil check means and other parts of the garment pressing machine hitherto described, means to move said oil check piston 82 back and forth during each respective closing and opening stroke of said oscillatable pressing member 20 so that said oil check means 'I8 may be loaded and also may function as an oil check on the movement of the oscillatable pressing member 20 in each direction. While sai-d piston moving means may be actuated in any suitable manner, in theimproved combination shown, said means is preferably actuated by the linkage or other actuating means 32 employed for oscillating the oscillatable member 20 in each direction. In the preferred embodiment, said means to move said piston 82 back and forth during each respectivestroke includes a lever 8B pivotally mounted on the frame as at SEI having a power arm 92 and a work arm 94 suitably pivotally vconnected to the piston rod 96 of said piston 82 as at 93. While said work arm 94 may be connected to the end of the piston by a single pivot connection 98, in the embodiment shown I have pivotally connected the` work arm 04 of said lever by the pivot pin 08 to an intermediate connecting link |05), having the opposite end thereof pivotally connected to the end of the piston rod 96 by the pivot connection |02. I also employ a pivotally mounted rocker arm |04 suitably pivotally connected to the frame. While this may be pivotally mounted on the frame in any suitable manner and pivoted by said actuating mechanism in said suitable manner, in the embodiment shown, said rocker arm |04 comprises an integral extension from the power applying lever 42 and the pivot point of said rocker arm |04 in ,this instance is identical to the pivot rod MI of saidpower applying lever 42 and said pivotally mounted rocker arm |04 is connected to said actuating means by being an integral part of the power applying lever 42, so.

that said rocker arm |04 may move in synchronism with the oscillating movement of said oscillatable pressing member 20 in each direction. I also employ a connecting link |06 forming a togpoint connection |08 and to said rocker arm |04 by the single point connection I I 0. It is thus obvious that said toggle |I2 formed by said rocker arm |04 and connecting link |00 has three pivotable points of attachment, namely the pivot 4point |03 connecting said connecting link |06 to the power arm of said lever 88, the pivot pointJ 44 of said rocker arm |04 and the interconnecting center pivot point I I0 connecting the opposite end of said connecting link |06 with the opposite end of vsaid rocker arm |04. An inspection of the drawings will show that the rocker arm |04 is brought into alignment on a dead center with said connecting link at the same predetermined point in both the closing and opening strokes of the oscillatable pressing member 20, raising the oil check piston 82 to its uppermost position shown in dash-dot lines in Figure 4, with said load said cylinder and said check valve 84 will be l automatically closed on the downstroke of said oil check piston so that fluid will be passed through the restricted bypass 86 as shown in Figs. 1-3 to function as an oil check on the downstroke of the oil check piston 82 on the remainder of the closing stroke of said rocker arm |04, link |06 and oscillatable member 20 beyond said dead center shown in Fig. 2 to function as a cushioning means just prior to the contact of the oscillatable pressing member or pressing head 20 with the other pressing member or buck I4, as shown in Fig. 3, and also to function as an oil check on the downstroke of the oil check piston 02 on the remainder of the opening stroke of said rocker arm |04, link |05 and oscillatable member 20 beyond said dead center to function as a cushioning means prior to the termination of the opening stroke of said oscillating pressing member 20, as indicated' in Fig. 1. As graphically set forth in Fig. 5, it will be observed that the dead center alignment of said toggle takes place at twelvesiXteenths of the downward movement of the press member, so that the oil check will function during the remaining one-quarter of the downstroke of the pressing head 20, but that on the upstroke of the pressing head 20, the dead center will be passedat four-sixteenths of the stroke, causing the oil check to function in a less abrupt manner during the remaining three-quarters of the upstroke of the pressing head, as graphically set forth in Fig. 5, so that employing my improved oil check the movements of the pressing member will be cushioned both on the downstroke and on the upstroke of the pressing member as graphically set forth by the full lines therein, illustrating the relative velocity of the press member modied by the oil check at the corresponding points in the up and down strokes, the action of the oil check and the unmodified action of the press member being shown respectively in dotted and dash-dot lines therein.

While as stated, by -invention is particularly designed and adapted for use in checking the movement of an oscillatable memberV movable at thev will of the operator having means to positively oscillate said member in each direction, it may, if desired, be adapted to check the movements of any positively oscillated member in each direction in a machine having means to positively oscillate said member so that on each respective oscillating `.stroke of said member, said oil check may be loaded up to said dead center and dis-- charged to function as an oil check beyond said dead center.

As stated hitherto, further features of my invention relate to improvements in the oil check itself, which, as stated employs a single piston and functions as an oil check for the movement of the oscillating member in either direction. Such a type of oil check includes :the cylinder 55, the piston32 having orifice means 33 therein, reciprocatable in said cylinder 8B having a check valve 84 mounted thereon urged in any suitable manner, preferably by the spring 85, toa position closing said orifice means 53 and the bypass line 85 connecting opposite ends of said cylinder 8G beyond the maximum positions of movement of said piston 82. While I preferably employ the spring 85 to actua-te the check valve, its use, while desirable, is not necessary as the pressure of the oil will automatically urge the check valve to a closed position on the downstroke of the piston.

I have shown in the drawings, my improved type of oil check employing such an adjustable pressure relief valve having spring controlled means for selectively locking said valve in any one of several adjusted positions, and in order that its features may be more clearly understood, I will now describe the mechanism shown in the drawings in greater detail.

In the embodiment shown, I employ an outer chamber I i4, which may be provided with a sight glass H6 in a side wall thereof, having a central horizontal partition HS which may be conveniently located near the lower end thereof mounting a relatively small cylinder 8@ in one portion thereof and having a bypass 85 in another portion thereof forming a bypass line having a portion forming the bypass orice 87, which in the preferred embodiment shown is counter-sunk or tapered. The piston 82 is provided with a plurality of circumferentially aligned orifice means 53, as shown in Figs. 6, 7 and 9. In order to keep the cylinder 80 of relatively short height and :to preserve its effectiveness, the piston 82 is provided with the annular flange |25 projecting downwardly therefrom, said piston 82 being reciprocatable in said cylinder B and having a piston rod 55 extending upwardly through a suitable hole |22 in the upper wall of said chamber, in theembodiment shown in a sui-table bearing |24 detachably securable in said upper wall of the chamber 4 by the locking screw |25. Said piston rod S5 has a reduced portion |23 projecting downwardly through said piston 82 having a threaded lower tip |35 and having a fiat check valve 84 for said orifice means 83 loosely mounted thereon, said piston `S2 being ncn-movably mounted on said reduced portion |23 of the piston rod 5t with a force t. A nut |32 is threaded on the threaded tip of said reduced portion |23 and a helical spring 85 .is interposed between said nut |32 and check valve 84.-'-

As stated, I have provided an adjustable needle valve |34 for said bypass orifice 87, and I provide mounting means for the valve rod |33 carrying said needle valve tip |34. In the preferred embodiment shown, said mounting means comprises a threaded hole |56 in the upper wall of said I chamber I4 directly in line with .and above said bypass orifice 81. Said chamber has an annular flange |45 projecting upwardly around said hole forming a guide well |42 having a lower portion |44 of smaller bore and an upper portion |45 of larger bore forming the annular shoulder |48 between said bores. In the specific embodiment shown I provide an inner sleeve |55 having an externally threaded portion |52 engaging said threaded hole |35, an enlarged portion 54 above said threaded portion |52 and a reduced portion |55 above said enlarged portion. The needle valve rod |38 is axially slidable within said i'nner sleeve |55 and has a threaded upper end |58 extending above said inner sleeve |55, an annular flange 5E! near the lower end thereof and a conically pointed needle tip |34 forming a needle valve projecting within said bypass orifice 87. The safety valve feature of the adjustable valve |34 is provided by the helical safety spring |52 surrounding the lower end of said rod |38 and having its upper end abutting the lower end of said inner sleeve |55 and its lower end abutting said rod flange |55.

I also provide an outer sleeve |64 axially slidable on said inner sleeve within said well |42 and having an axial slot |66 in the lower end thereof and an annular flange |58 at the upper end thereof having a plurality of circumferentially aligned stop holes |75 (see Fig. 8 therein) in the upper surface thereof. A pin |72 projects'radially inwardly from the lower portion of said well |42 within said axial slot |66 to provide means for preventing rotation of said outer sleeve |154. A helical locking spring |74 surrounds said outer sleeve |54 and has its lower end abutting the shoulder |48 of said chamber well |42 and its upper end abutting the outer sleeve iiange |63.

I also provide a knurled adjusting knob |76 having its inner periphery frictionally engaging the reduced upper end |56 of said inner sleeve with a force fit so that rotation of said adjusting knob may also rotate said inner sleeve |50, said knob having a locking pin |78 projecting downwardly from the lower surface thereof selectively engageable with a respective stop hole Il@ on the upper surface of the outer sleeve flange |58. It is thus obvious that said knurled adjusting knob H5 with its locking pin |78 movable on rotation of said adjusting nut out of a respective selected hole 70 in the flange |58 of said outer sleeve |54 forms manually operated means for adjusting said sleeve |50 and valve rod |38 movable therewith relative to said bypass orifice 87 on compression of the locking spring |74. The spring |74, yielding for this purpose to permit the locking pin |73 to move out of its inserted hole |75, forms a spring actuated locking device for loclL'ng said inner sleeve |50 and valve rod :|38 movable therewith in a plurality of selected adjusted positions, relative to said bypass orifice 57, releasable for re-adjustment on substantial rotative pressure applied to said knurled adjusting knob |76, with the helical locking spring |74 compressing for this purpose. I also provide removable stop means comprising the internally threaded nut |85 detachably threaded on the threaded upper end |58 of said valve rod |38 to abut the upper surface of said knurled adjusting knob |75 to limit the downward movement of said rod |33, which nut |80 may also be adjusted, if it be desired, to vary the effective pressure of the safety spring |52.

'In practice, the knurled adjusting knob |76 is rotated against the pressure of the locking spring |74 until the needle valve |34 is brought g Y into the desired positionl in the bypass orifice 81 with the locking pin |18 inserted in the closest adjacent locking hole |10. If for any reason an excessive fluid pressure should take place in the cylinder `8l) in the lower portion of the chamber |4, the safety spring |62 may compress to permit the safety valve |34 to rise to an open position freeing and enlarging the orifice 81 for the discharge of fluid therethrough, as shown in Fig. 6. The piston 32 functions in the cylinder `8|) in the manner hitherto described, the check valve 84 compressing the spring 85 for the passage of fluid through the orifice means 3 3 for loading purposes on the upstrokek of the piston until the aforedescribed oi-center position of the links is achieved, when on the continuation of the closing or opening strokes of the oscillatable member the piston 82 is lowered within the cylinder 80, forcing fluid through the bypass line B6 and restricted orice 81 thereof restricted by the needle valve |34, which may be inserted in selected adjusted amounts in said orifice 81 to regulate the amountv of liquid which may be passed through said bypass line 86. The amountrof the adjustable insertion of the needle valve |34 in the bypass orice $1 therefor determines the restriction of said orifice, which controls the speed at which the oil may pass, through the bypass and the amount of checking which may be provided on the circulation of oil therethrough.

As previously pointed out, the fact that the rocker arm |54 is mounted on the same pivot point dil as a portion of the actuating linkage system for the oscillatable member is coincidental, and the rocker arm |04 may be mounted, if desired, on a separate fulcrum and suitably connected to the actuating mechanism in any suitable manner.

It is apparent that I have provided a novel type of pressing machine and cushioning device for use therein with novel structural features inherent in the. oil check and with the advantages described above.

It is understood thatfmy invention is not limited to the specific embodiment shown and that various deviations may be made therefrom without departing from the spirit and scope of the appended claims.

What I claim is: f

1. In a pressing machine, a relatively stationary pressing member, a pressing member relatively oscillatable at the will of the operator from an open position to a position in pressing contact with the stationary pressing member on the closing stroke and from said closed position to said open position on the opening stroke, means effective at the twill of the operator to actuate said oscillatable pressing member to effect said closing and opening oscillating strokes, and a device for cushioning said strokes of said oscillatable pressing member, comprising oil check means including a cylinder, a piston reciprocatable therein having a check valve therein adapted to be closed on the downward stroke of the piston and a piston rod and a fluid movement restricting bypass connected to said cylinder on opposite sides of said piston, a pivotalllr mounted lever having a power arm and a work .arm pivotally connected to said piston rod, a

pivotally mounted rocker arm connected to said actuating means tomove said rocker arm in synchronism with the oscillating movement of said oscillatable pressing member in each direcand a connecting link forming a toggle tion, with said rocker arm pivotally connected to the 10 power` arm of said lever and to said rocker arm brought into alignment on a dead center with said rocker arm at the same predetermined point in both the closing and opening strokes of said pressing member whereby fluid will be passed through said check valve on the upstroke of said oil check piston during the initial portions of the closing and opening strokes of said rocker arm, link and oscillating pressing member up to said dead center to load said cylinder, and fiuid will be passed through said flow restricting bypass to functi-on as an oil check on the downstroke of said cil check piston on the remainder of the closing stroke of said rocker arm, link and oscillatable member beyond said dead center to function as a cushioning means prior to the contact of the oscillatable pressing member with the other pressing member and on the remainder of the opening stroke of said rocker arm, link and oscillatable member beyond said dead center to function as a cushioning means prior to the termination of the opening stroke of said oscillating pressing member.

2. In a pressing machine, a relatively stationary pressing member, a pressing member relatively oscillatable at the will of the operator from an open position to a position in pressing contact with the stationary pressing member on the closing stroke and from said closed position to said Vopen position on the opening stroke, means effective at the will of the operator to actuate said oscillatable pressing member to effect said closing and opening oscillating strokes, and a device for cushioning said strokes of said oscillatable pressing member, comprising oil check means including a cylinder, a piston reciprocatable therein having a check valve therein adapted to be closed on the downward stroke of the piston and a piston rod and a fluid movement restricting bypass connected to said cylinder on opposite sides of said piston, a pivotally mounted rocker arm connected to said actuating means to move said rocker arm in synchronism with the oscillating movement of said oscillatable pressing member in each direction, and a connecting link forming a toggle with' said rocker arm pivotally connected to said piston rod and to said rocker arm brought into alignment on a dead center with said rocker arm at the same predetermined point in both the closing and opening strokes of said pressing member whereby fluid will be passed through said check valve on the upstroke of said oil check piston during the initial portions of the closing and opening strokes of said rocker arm, link and oscillatingpressing member up to said dead center to load said cylinder, and iiuid will be passed through said flow restricting bypass to function as an oil check on the downstroke of said oil check piston on the remainder of the closing stroke of said rocker arm, link and oscillatable member beyond said dead center to function as a cushioning means prior to the contact of the oscillatable pressing member with the other pressing member and on the remainder of the opening stroke of said rocker arm, link and oscillatable member beyond said dead center to function as a cushioning means prior to the termination of the opening stroke of said oscillating pressing member.

3. A device for checking the oscillating movement of a positively oscillated member in each direction in 9, machine having means to positively oscillate said member, comprising oil check means including a cylinder, a piston reciprocatable therein having a check valve therein adapted to be closed on the downward stroke of the piston and a piston rod and a luid movement restricting bypass connected to said cylinder on opposite sides of said piston, a pivotally mounted lever having a power arm and a Work arm pivotally connected to said piston rod, a pivotally mounted rocker arm, means connected to the means for oscillating said member to move said rocker arm in synchronism with the oscillating movement oI" said member in each direction, and a connecting link forming a toggle with said rocker arm, pivotally connected to the power arm of said lever and to said rocker arm, brought into alignment on a dead center with said rocker arm at the same predetermined point in each stroke of the oscillating member in each direction ywhereby fluid will be passed through said check valve on the upstroke of said oil check piston during the initial portion of each stroke of said rocker arm, link and oscillating member in either direction up to said dead center to load said cylinder and iluid Will be passed through said 110W restricting bypass to function as an oil check onthe downstroke of said oil check piston on the remainder of each stroke of said rocker arm, link and oscillating member in either direction beyond said dead center.

4. A device for checking the oscillating movement of a positively oscillated member in each directionv in a, machine having means to positively oscillate said member, comprising o-il check means including a cylinder, a piston recilorocatablev therein having a check valve therein adapted toV be closed on the downward stroke of the piston and a piston rod, and a flow restricting bypass connected to said cylinder on opposite sides. of said piston, a, pivotally mounted rocker arm connected to. the means for oscillating said member to move said. rocker arm in synchronisml with the oscillating movement of s aid member in each direction, and a connecting link forming a toggle. with said rocker arm, pivotally connected to said piston rod and t'o said rocker arm, brought into alignment on a dead center with, said rocker arm at the same predetermined. point` in eaQh stroke of the oscillatingr member in each direction whereby` iluid will be passed through said check valve on the upstroke` of said oil check piston, during the initial portionfof, eachA stroke of said rocker arm, link` and oscillating member in either direction up to said dead center to load said cylinder and' fluid will be passed through s aid ovv restricting bypass to function asv an oil' check on the downstroke of said oil check piston on the remainder of each stroke of saidY rocker arm, link and os- 12 cillating member ineit-her direction beyond said dead center.z

5 A device for'checking the oscillating movement of a'positively oscillated member in each direction in a machine having means tor positively oscillate said member, comprising oil check means including a" cylinden a piston reciprocatable therein having a checkY valve therein adapted to be closedon the downward stroke of the piston anda piston rod, a pivotally mounted rocker arm connected to the means for oscillating said member to move said rocker arm in synchronism with the oscillating movement of said member in` each direction, and a connecting link forming a toggle with said rocker arm, pivotal-ly connected to said piston rod and to said rocker arm, brought into` alignment on a dead.

center Iwith said rocker arm at the same predetermined point in each stroke of the oscillating member in each direction whereby uid will be passed through saidV check valve on the upstrokey of said oil check piston during the initial portion of each stroke of said rocker arm, linkandoscillating member in either direction up to said dead center to load? said cylinder and fluid will be passedr through said ow restricting bypass to function as an oil check on the downstroke of said oilI check pistonl on the remainder of each stroke of said rocker arm, link and oscillating member in either direction beyond said dead` ciente-r.

- HERBERT G. BEEDE.

REFERENCES CITED The.v following references are of recordI in the le. of this patent:

UNITED STATES' PATENTS Number Name Date 758,020, Robinson Apr. 19, 1904 783,078 Richardson Feb. 21, 1905 1,059,368 Johnson Apr. 22I 1913 1,177,134 Parker Mar. 28, 1916 1,202,082` McCorkle Oct. 24, 1916 1,435gf732 `Pierce Nov. 14, 1922 1,461,256 Thompson July 10, 1923 1,524,865 Hughes Feb. 8, 1925 1,547,172 Knauf July 28, 1925 1,561,810 Welks Nov. 17, 1925 2,138,372 Davis Nov. 29, 1938 2,220,994 Davis Nov. 12, 1940 2,234,145 Kaurnan Mar. 4, 1941 2,242,481 Reynolds May 20, 1941 2,264,856 Peppard Dec. 2, 1941 2,291,499 Penick July 28, 1942 1,829,394, Davis Oct. 27, 1931

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