US2381917A - Control for pressing machines - Google Patents

Description

Aug. 14, 1945.

F. C. LORNITZO CONTROL FOR PRESSING MACHINES Filed Jan. 28, 1941' 5 Shets-Sheet 1 [6Q fno'an/or 16 fkA/vk C. L'o A/lrzo By W a. fiffarrzz z/ Aug. 14, 1945. c LORNITZO 2,381,917

CONTROL FOR PRESSING MACHINES 1 I} [is I 88 68 78 52 58 r 5; 8

- I26 34 J 108 64 96 9o 70 92 "Ill/ iq: 1111 11 1721/07/02 fR/ A/k 0. Lomwrzo Aug. 14, 1945- F. c. LORNIT-ZO 2,381,917

CONTROL FOR PRESSING MACHINES Filed Jan. 28, 1941 a Sheets-Sheet 3 fr? min/0r FRA/vk C. LoR/v/rzo Patented Aug. 14, 1945' CONTROL FOR PRESSING MACHINES Frank C. Lornltzo, Pawtucket, It. I., assignor'to Pantex Pressing Machine, Inc., Central Falls, B. L, a corporation of Delaware Application January 28, 1941, Serial No. 376,286

' 12 Claims. (Cl. 12l-38) My invention relates to controls for Pressin machines of the general type shown in my co-= pending application for Safety control for pressing machines, Ser. No. 364,287, filed October 28,. 1940.

An object of my invention is to provide an al-' temative type of structure embodying certain general principles 'shown in said application, wherein for safety purposes both of the operator's hands are required for the actuation of a pair of handles until the pressing members have been broughtinto pressing juxtaposition, when they may be released during. the pressing operation.

A further feature of my invention analogous to that shown in said application is that alternative means are provided to continue to apply ironing pressure after the pressing members have i been brought into pressing juxtaposition and the respective actuating handles are released, al-

' though the embodiment of the means shown for this purpose shown in this application is considerably difierent from the means for the same purpose shown in said application. A major difference between the inventions shown in these applications is that in the present instance no master control valve is employed, but a pair of valves movable in a single direction only are employed for the purpose of admitting fluid to the fluid motor to bring the pressing members intopressing juxtaposition and a separate valve movable also in a single direction only is employed for evacuating the fluid motor.

A further object of my invention is to provide a device which willautomatically operate to supplementally actuate the pressing members to apply an additional maximum ironing pressure .after :both the actuating handles are released, or

if desired, one in which the fluid motor will merely hold the pressing members in pressing juxtaposition without the application of additional ironing pressure.

A further object of my invention is to provide in a pressing machine a device which will lock the fluid motor in an actuating position whether or not it applies sustained pressure or increased pressureto the pressing members during the ironing operation, effective with a delayed action after the pressing members have been brought into pressing juxtaposition, thus permitting the release of the handles during the pressing operation. In the embodiment shown, this locking device is released by the pivoted cylinder of the fluid motor, although it may be released by any portion of the actuating mechanism, such as shown in myapplication for Safety control for pressing machines aforesaid, or by the fluid flow itself,

as shown in my application for Flow control forpressing machines, Ser. No. 377,018 filedFebruary 1, 1941,01' in any other suitable manner.

In addition, I believe I am the first to apply a new principle in flow control members, in that Lprovide a flow control member movable to at least two positions in a flow line automatically movable to one of said positions by the flow of fluid through said line, and means for positively moving said flow control member to its other said position. In the embodiment shown in the instant application, these flow control members may comprise a movable valve port closure, movable by the flow to an open or closed position, and in the combination shown I employ a plurality of such valves, two of which are moved by the flow to a closed position and one of which is moved by the flow to an open position, and manually actuated means are provided to move said valve closures to their other respective positions, al.-

' though, this same principle may .be carried forward to actuate other mechanism, such as the flush valve shown in my application for Safety control for pressing machines aforesaid, the handle latch shown in my application for Latch control for pressing machines, Ser. No. 376,860 filed January 31, 1941 and the controls embodying similar features in my application for patent for Flow control for pressing machines, Ser. No. 377,018 filed February 1, 1941 and if desired resilient, automatic or other means may be provided to move the flow control member to its other position.

Another feature of my invention is that I employ semi-automatic valves of the same general type, the inlet valve being of a flow closable type,

the exhaust valve being of a similar flow open-- able type, and the supplemental exhaust valve being of a similar flow closable type, so that the flow itself operates to make the various valves effective with a minimum, amount of actuation, a

" single manual operation of each valve in a single direction being all that is necessary, the flow itself actuating the respective valves in the opposite direction. I believe I am the first to provide valves in a fluid flow control system for this purpose, wherein the flow itself functions at intervals of the operation of the device to open or close the valves in the desired sequence for the operation of relatively closing and opening the pressing members of a pressing machine. Employing this construction, the flow closable inlet valve functions to close itself when the handle theieflol'e is released and the primary exhaust cause opening of the primary exhaust valve and to close the supplemental exhaust valve after it hasbeen rendered operable. This also, I believe.

is a new principle in flow control members, whether the remote control be employed to actuate a valve, as shown in this application, or to actuate a latch or to operate another valve as shown in said application for Latch control for pressing machines, or to operate other valves or mechanism as shown in said application for flow control for pressing machines, in all embodiments shown in these applications, the flow control member not only being initially moved by the flow, but also maintained in a desired position by the flow, whether it be moved or not by the flow.

A further feature of my invention is to provide a control for pressing machines which may be operated step by step by the proper manipulation of. the various valves to relatively move the pressing members towards or away from each other desired predetermined adjustable amounts.

A further feature of my invention is that I have provided a system in which the sensitivity thereof may be readily adjusted to'meet the desired operating conditions.

A further feature of my invention is to provide a device wherein the raising of the pivoted cylinder as the pressing members are brought into pressing juxtaposition automaticallypperates to close the supplemental exhaust valve on release of the primary exhaust valve handle, although it is apparent that this means may be actuated by the linkage or otherwise if desired.

A further feature of my invention resides in the fact that I employ as operating valves a simple type of handle operating globe valve modified in each instance to achieve its particular desired function in the control system.

Further features of my invention relate to the specific construction of the specific valves shown,

which, as stated, are all of a modified globe type and in which the valve closures may be aided in being brought to their desired positions by gravity functioning with or against the flowitself.

-While I have shown my invention as applied to the actuating means for a pressing machine, it is obvious that both the features of the flow control devices themselves and the entire combination may, if desired, be applied to other uses.

These and such other objects of my invention as may hereinafter appear will be best understood from a description of an embodiment thereof, such as is illustrated in the accompanying drawings.

In the drawings, Fig. 1 is a side elevation of a pressing. machine equipped with my improved controlmeans for the fluid motor.

Fig, 2 is a diagrammatic view of inherent parts of my invention employed in a single control line having a branch going to the fluid motor intermediate the inlet and outlet portions thereof with a manually operated inlet valve in the inlet portion and two manually operated exhaust valves in the exhaust portion and illustrating adjacent portions of the pivoted cylinder and the supplemental exhaust valve actuated by the pivoted cylinder, the parts being shown herein in a static position.

Fig. 3 is a diagrammatic view of the parts shown in Fig. 2 with the operating handle for the inlet valve and the operating handle for the exhaust valve both depressed to permit the flow of fluid to the fluid motor to bring the pressing members into pressing juxtaposition.

Fig. 4 is a diagrammatic view of the parts shown in Figs. 2 and 3 after the means actuated by the fluid motor have become effective to permit self-closing of the supplemental exhaust valve for further actuation of the fluid motor to apply ironing pressure to the pressing members, and the release of the handles for the inlet and primary exhaust valves during such application, and the operation of the handle of the supplemental exhaust valve for exhausting the fluid motor, the handle of the supplemental exhaust valve being shown in dotted lines, when moved to a position exhausting the fluid motor for separation of said pressing members.

Fig. 5 is a view of the parts shown in Figs. 2, 3 and 4 after the handle of the supplemental exhaust valve has been automatically moved to a position insuring the continued exhaust of fluid from the fluid motor to separate the pressing members after it has been initially manually actuated, as shown in dotted lines in Fig. 4.

Fig. 6 is a detailed vertical sectional view of the flow closable manually openable adjustable inlet valve I preferably, employ.

Fig. 7 is a detailed vertical sectional view of the flow openable manually closable exhaust valve I preferably employ. I

Fig. 8 is a detailed vertical sectional view of the supplemental flow closable manually openable exhaust valve I preferably employ.

, In the drawings, wherein like characters of reference indicate like parts throughout, I have illustrated my improved control means for pressing machines applied to a garment pressing machine 20 of the standard type. Said pressing machine has mounted thereon relatively movable pressing members 22 and 24, in the embodiment shown comprising a stationary pressing buck 22 projecting upwardly from the usual table 25 mounted on the machine frame 23. The pressing head M is movable relative thereto and in the embodiment shown is pivotally mounted on the machine frame 28 by the pivot pin 30, preferably on a lever 32 of the first class having a power arm 38 on the end of which the movable pressing head 24 is pivotally mounted, and a weight arm 36 especially weighted to normally raise the pressing head 24 to an open position away from the buck 22. Suitable actuating means are provided for relatively moving said pressing members 22 and 24 to a pressing position, in the embodiment shown, comprising a fluid motor 38 and the linkage Ml actuated thereby to raise the weight arm 36 of said pressing lever 32. A suitable feed line 52 is provided for said fluid motor. In the embodiment shown, the fluid motor comprises a cylinder -cylinder 44, being connected to a suitable port 68 near the pivot end of said cylinder by the flexible hose 62. It is thus apparent that the portion of the control line 42 up to said branch 58 and said branch-58 and hose 62 form the inlet line to said fluid motor and that said hose 62, branch- 58 and portion64 of said feed line 42 beyond said branch form the outlet line for said fluid motor.

A flow openable manually closable exhaust valve 66 is provided in said exhaust line 64, whereby manual Opening of said inlet valve 56 and manual closing of said exhaust valve 66 may cause a flow of fluid through said inlet line 42. branch 58 and hose 62 to said fluidmotor, as shown by the arrows in Fig. 3, the manual closing of the exhaust valve 66 shutting off'the outlet line 64 from said motor.

In addition, I providea flow closable manually openable supplemental exhaust valve 68 in said exhaust line beyond said primary flow-openable exhaust valve 66 to permit flow ,of fluid through and beyond said exhaust valves to evacuate said fluid motor through the exhaust end 54, as shown by the arrows in Fig. 5. to separate said pressing valve member I4 being capable of being retained in an open position by a diminished flow of fluid therethrough. The exhaust valve 88 also has an exhaust valve port I8 and a movable valve member 88 urged to an open position free of said port by a. flow of fluid through said port I8 and outlet line 64, and the means for manual actuamembers 22 and 24 on manual opening of said flowclosablesupplementalexhaust valve 68. In addition, I provide means I8 actuatedby said actuating means, in thespecific embodiment by the pivoted fluid cylinder 44, when said actuating or control means, including the fluid motor 38 has functioned to bring said members 22 and 24 into pressing juxtaposition in the manner hitherto described, operable to permit flow closing of the supplemental exhaust valve 88 to permit release of the manually operable handle means for the. inlet valve 56 and the manually operable handle means for the primary exhaust valve 66 while the flow opening of the inlet valve 56 and the flow closing of the supplemental exhaust valve 68 functions to permit the flow of supplemental fluid to said cylinder for further actuation of said fluid motor 38 to apply ironing pressure, and after a desired interval of ironing pres-sure application the manual'actuation of said self-closing supplemental exhaust valve 68 to open said supplemental exhaust valve 68 to exhaust said fluid motor 38 through said end 54 to separate saidpressing members 22 and 24, as shownby arrows in Fig. 5.

It is apparent, however, that said last mentioned means to permit the manual actuation of said supplemental exhaust valve may be constructed to function at any desired portion of the the stroke of the piston cylinder, but preferably in the manner explained, to function as soon as said pressing members have been brought into 'pressing juxtaposition to permit release of the handles of the inlet and primary exhaust valves prior to the application of the ironing pressure.

The inlet valve 56 has an inlet valve port.12

and a movable valve member 14 normally urged to a position closing said inlet port by a rapid flow of fluid through the inlet portion of said control line. The means 16 for manual actuation able preferably from adjacent the table 26 for moving said valve member 14 away from saidport I2 to permit flow of fluid therethrough, said of said valve comprises a handle manually opersaid fluid motor to bring said pressing members 22 and 24 into pressing juxtaposition. The supplemental exhaust valve 68 has a. valve port 84 and a movable valve member 86 urged to a closed position closing said port by a flow of fluid through said line and a manually operable handle 88 for moving said valve member 86 away from said port 84 to permit flow of fluid through said supplemental exhaust valve 68 to evacuate said fluid motor to permit separation of said relatively movable pressing members 22 and 28.

In the embodiment shown, the handle means 88 is rendered normally inoperable by a lever 88 pivotally mounted on said frame having a power 'of. the handle asand to retain said handle as in a position moving said valve 86 away from said port 84 to normally maintain the supplemental exhaust valve 68 in an open position. Suitable means are provided to raise the weight arm 84 of said lever '88 to lower the power arm 82 thereof away from the operating portion 88 of said handle 88 to permit self-closing of the valve 86 of said supplemental exhaust valve 68 by the flow of fluid through the exhaust line and later operation of the handle 88 to open said valve to exhaust said motor when desired, in other words, to provide means to permit the operating portion 88 of said handle 88 to drop, aided by the action of the spring I58, to permit selfclosing of said supplemental exhaust valve and the actuation of said handle to exhaust the fluid motor after fluid pressure'has operated to move the piston head 48 sufllcientlyto bring the pressing members 22 and 24 into pressing juxtaposition. In the embodiment shown, said means comprises a link 88 projecting downwardly from said weight arm 84 having a lower end provided with an elongated slot I88 and a pin I82 projecting laterally from said cylinder 44. As shown in Fig. 4 when the cylinder 44 approaches the upper portion of its stroke, the pin I82 strikes the upper end of the slot I88 permitting said pin I82 to raise the link 88 and lever weight arm 94 to lower the power arm 82 away from the actuating portion 88 .of the handle 88 for the purposes hith-' motor, as shown by the arrows in Fig. 5, as said head 24 moves away from the buck 22.

While any suitable type of flow closable manually openable inlet valve 56, any suitable type of flow openable manually closable primary exhaust valve 66 and any type of flow closable manually openable supplemental exhaust valve 68 may be employed, I preferably employ for this purpose three handle operated control valves mounted in said line of generally similar construction, each comprising respectively, a valve chamber I84, I86 and I88 having a respective partition I I8, H2 and I I4 having respective ports I2, I8 and 84 therein, dividing said respective chambers I84, I86 and I88.into respective inlet chambers I22, I24 and I26 respectively and respective outlet chambers I28, I38 and I32 respectively; a respective socket I34, I36 and I38 projecting towards said respective port I2, I8 and 84 in one of said respective chambers and terminating at a spaced distance therefrom and having a plurality of respective perforations I48, I42 and I44 in the wall thereof valve closure 86 in the inlet ch'amber I26 thereof adjacent the base thereof, a respective valve clo- I sure member I4, 88 and 86, preferably comprising a ball valve reciprocatable in said respective socket I34, I 36 and I38 to and from positions closing said respective ports I2, I8 and 84 and a respective valve stem I46, I48 and I58 reciprocatable in each respective valve to and from positions moving said respective valve closure members to close said respective ports I2, I8 and 84, each having a reciprocatable handle I6, 82 and 88 operable from without said valves 56, 66 and 68 to abut and move said valve closures I4, 88 and 86 relative to said ports I2, I8 and 84.

One of said valves, namely, the valve 56 is flow closable and is mounted in the inlet portion of said line in front of said cylinder branch 58 with the inlet chamber I22 underneath and having the socket I34 projecting upwardly therein, the valve stem I46 thereof projecting upwardly and having the operating button or handle I8 on the upper end thereof to lower the valve stem I46 to abut said valve closure I4 to free it from said chamber port I2 to open said valve and'spring mean I52 normally raising said valve stem I46 free of said valve, suitable means being provided for mounting said spring and operating button "I6 above said valve adjacent said table, in the embodiment v shown, comprising a handle socket i5 1.

Another of said valves, namely the primary exhaust valve 66, is flow openable and is mounted in the exhaust portion 68 of said flow line beyond said cylinder branch 58- with the inlet chamber E28 thereof underneath and having the socket I 88 containing the valve closure 88 thereof projecting downwardly within the outlet chamber 588 thereof to permit fluid flow in said line to raise said ball valve 88 free of said port I8 and the valve stem I48 thereof projecting upwardly and having an operating button or handle 82 on the upper endthereof to lower said valve stem I48 to abut said valve closure 88 to seat it firmly on said chamber port I8 and spring means I56 normally raising said valve stem I48 free of said valve '88, said spring and operating button being also enclosed in a. suitable socket I64 also projecting upwardly therefrom adjacent the table 26. In the embodiment shown, both the handle socket I54 andthe handle socket I64 project upwardly through the table, as shown in Fig. 1. The other of said valves, namely the supplemental exhaust valve, 68 is flow closable and is mounted in the exhaust portion 64 of said line beyond said primary exhaust valve 66 with the socket I38 and closure 86 to a position closing said port 84 and with the. valve stem I58 thereof reciprocatable to move said valve closure 86 from said port 84 and spring means I58 normally urging said valve stem I58 free of said ball valve 86 and a. handle 88 having an actuating portion 89 to move said valve stem I58 to move said valve closure 86 from said port 84. In the embodiment shown, the supple mental exhaust valve 68 is mounted in a portion of the outlet line 64 underlying the portion containing the primary exhaust valve 66 and in this instance the operating handle 88 is located underneath the valve with the valve stem I58 projecting through the exhaust chamber so that the actuating portion 89 of the handle 88 thereof may be abutted by the power arm 92 of the lever 98 to normally actuate the valve stem I58 to move the valve 86 to an open position free of said port 84.

In the embodiment shown, the inlet valve 56 is provided with the adjusting screw I68 projecting upwardly through said socket I34 to regulate the reciprocable movement of the valve closure I4 in said socket and hence its sensitivity to kinetic pressure. The adjusting screw I68 is provided with the knurled handle I62 for raising it within said socket I34 to vary the reciprocative movement of the ball valve. By variations in the advancement of the adjusting screw the sensitivity of the ball valve to kinetic pressure may be so increased as to substantially close the valve on any flow of fiuid through the inlet line 42-5Il. With this feature, it is obvious that a step-bystep actuation of the pressing members 22 and 2 is possible, the inlet valve with a suitable close adjustment being automatically closed by the flow after a substantial actuation thereof. Should a step-by-step actuation be not desired, it is apparent that the adjusting screw may be adjusted to permit a greater movement of the ball valve I4.

Fig. 2 illustrates the static position of the device with the pressing head 24 raised to an Open position. In Fig. 3 the respective handles I6 for the inlet valve 56 and 82 for the primary exhaust valve 66 are depressed, positively opening the inlet valve 56 and positively closing the exhaust valve 66, the supplemental exhaust valve 68 being automatically held open by the weighted lever 98. In this position fluid will flow through the inlet valve 56 and down through the branch 58 to the cylinder 44 to urge the piston 48 outwards to move the linkage 48 and lever 32 to bring the pressing head 24 into pressing juxtaposition with the buck 22, the ressure fluid flowing for this purpose in the manner indicated by the arrows in Fig. 3, When the piston 48 has neared the end of its stroke and the cylinder it raised to substantially the upper limit of its pivoted movement, the pin I82 will abut the upper end of the slot I88 in the link 98 to raise the weight arm 94 of the lever 98 overcoming the force of gravity exerted by the weight 96 to lower the power arm 92 of said lever away from the actuating portion 89 of the handle 88 for said supplemental exhaust valve, as shown in full lines in inder 44, the valve 12 being retained in an open position by gravity for this purpose with a di- ,minished flow of fluid therethrough, thus permitting further actuation of the fluid motor I! to apply a greater ironing pressure on said pressing members. and 24 after the respective handles I8 and 82- are released. When it is then desired to evacuate the fluid motor to separate the pressfrom the port 84 to permit flow of fluid out through the discharge end M of said outlet line,

the valve closure at in the primary exhaust valve 66 being opened by pressure in the outlet line assign 14 to an open position, the handle 82 to move the ball valve 80 to a closed position, and the handle 08 to move'the ball valve 86 to an open position.

. It is also apparent that the ball valve 14 will tend to drop by gravity to an open position, and the ball valves M and 86 will tend to drop by gravity to a closed position, and it is thus obvious that the flow will operate against gravity to close the ball valve H, against gravity to open the ball valve .80, and with gravity to maintain the ball valve to in a closed position. As stated hitherto,

- I believe the specific structure of these valves makmeans remote from the flow control member or ball valve so to initiate the flow to open the ball caused by the weight arm 38 of the pressing lever 32 urging the piston 48 inwards in the cylinder towards the open position as shown in Fig. i.

Fig. 5 shows the device in the act of evacuating the fluid cylinder through the primary exhaust valve 66 which is retained in an open position .by

the flow of fluid therethrough and the supplemental exhaust valve 88 moved to an open position initially by the manual actuation of the handie 90, asshown in dotted lines in Fig. 4, and retained in an open position by the weight 86 urging the power arm 92 of the lever 90 against the actuating portion 89 of'said handle, as shown in Fig. 5, urging the valve stem I56 upwards to lift the valve closure 86 free of its respective exhaust port 84.

It is thus obvious that the present device shows the same safety features as mentioned in my application for Safety control for pressing machines aforesaid, whereby the fluid motor is actuated when two-handles are depressed or moved in a single direction, the hands being occupied in actuating the handles until the pressing-members have been brought into pressing juxtaposition. Instead of movement of one of these handles to exhaust the fluid motor, I provide a supplemental handle for'actuating a supplemental exhaust valve for this purpose. In addition, means are provided to normally retain the actuating means in a position continuing the flow offluid to the fluid motor to exert a continued ironing pressure after the pressing members have been brought into pressing juxtaposition, in this instance, however, said means being actuated by the pivoted cylinder rather than the linkage.

I also preferably employ, as shown in said apcreased ironing pressure on the movable pressing head, as described in more detail in said application. The means to permit flow opening of the supplemental exhaust valve 68 is preferably timed to operate simultaneously with this change .01 mlcrum to permit release of the operating han I8 and 82 when the pressing members have been brought into pressing juxtaposition and prior to the application of the increased ironing pressure.

As stated hitherto, it is obvious that each of the valve closures ll, 80 and 86 in the valves 56,

68' and 68 are moved by the flow to one of their positions, the valve closure I4 being moved by the flow to a closed position, the valve closure 80 being moved by the flow to an open positiomand the valve closure 86 being moved by the flow to a closed positionand that means are provided to move said valves to their respective opposite positions, namely the handle 18 to move the ball valve ing these features possible is new. It is also apparent that the handle 26 opening the inlet valve I4 functions as manually controlled priming other flow control members, such as another valve,

as in the'flush valve shown in my application for patent for Safety control for pressing machines, the latch bolt shown in my application for Latch control for pressing machines, or the valve or handle actuator shown in my application tor Flow control for pressing machines.

Particularly in pressing machines, it is desirable "to apply a supplemental maximum amount of pressure during the ironing, and for this purpose the inlet valve closure 14 shown of such a weight that it will drop by gravity on a diminished flow of fluid in said line to permit a further actuation of the fiuid motor do to apply additional pressure during the application of ironing pressure. It is obvious, however, that if desired for pressing or other purposesthe valve 14 may be adjusted so as to merely hold the fluid motor in a position to apply a sustained pressure but not an increased pressure. I have shown in this application supplemental means comprising the primary exhaust valve 66 for closing the outlet line while the pressing members are being brought into pressing -juxtaposition. I have found, however, as shown in my application for patent for Flow control for pressing machines, that the device may be so arranged and assembled that this supplemental means becomes-unnecessary. It is apparent, however, that my invention may be employed without any means to permit release of the handles 16 and 82 during the application of ironing pressure. 1

It is apparentthat I have provided a novel type of control means for'pressing'machines with the advantages described above.

It isunderstood that my invention is not limited to the'speoiflc embodiment shown and that various deviations may be made therefrom without departing from the ,spirit and scope or the appended claims.

WhatIclaim is: a

1. In a pressing machine, relatively movable pressing members, actuating, means including a fluid motor for relatively moving said members to a pressing position and thereafter applying pressure, an inlet line for said fluid motor, .an outlet line for said fluid motor, an inlet valve in the inlet line having a valve port and a movable through said line and manually operable means I for moving said valve member against said port to prevent flow of fluid therethrough, whereby actuation of both manually operable means for the inlet and exhaust valves simultaneously may actuate said fluid motor to bring said pressing members to a pressing position and a supplemental exhaust valve in the exhaust line having a valve port and a movable valve member urged to closed position by the flow of fluid through said line to permit release of the manually operable means for opening said inlet valve and the manually operable means for closing said primary exhaust valve while the fluid flow opening of said inlet valve and the fluid flow closing of said supplemental exhaust valve function to permit further actuation of said fluid motor to apply said pressure, and manually operable means for moving said supplemental exhaust valve member away from said port to permit flow of fluid therethrough to evacuate said fluid motor' on release of the manually operated valve closing means for the primary exhaust valve.

2. In a pressing machine, relatively'movable pressing members, actuating means including a fluid motor for relatively moving said memmrs to a pressing position, an inlet line for said fluid motor, an outlet line for said fluid motor, an inlet valve in the inlet line having a valve port and a movable valve member urged to a position closing said port by a flow of fluid through said line, manually operable means for moving said'valve member away from said port to permit flow of fluid therethrough, a primary exhaust valve in the exhaust line having a valve port and a movable valve member urged to an open position free of said port by a flow of fluid through said line and manually operable means for moving said valve member against said port to prevent flow of fluid therethrough, whereby actuation of both manually operable means for the inlet and ex- 4 haust valves simultaneously may actuate said fluid motor to bring said pressing members to a. pressing position and a supplemental exhaust valve in the exhaust line having a valve port and a movable valve member urged to closed position by the flow of fluid through said line to permit release of the manually operable means for opening said inlet valve and the manually operable means for closing said primary exhaust valve while said fluid motor continues to apply pressure during the pressing operation, and manually operable means for moving said supplemental exhaust valve member away from said port to permit flow of fluid therethrough to evacuate said fluid motor on release of the manually operated valve closing means for the primary exhaust valve valve member urged to a position closing said port by a rapid flow of fluid through said line, manually operable means for moving said valve member away from said port to permit flow of fluid therethrough, said valve member being capable of being retained in an open position by a diminished flow of fluid therethrough, a primary exhaust valve in the exhaust line havin a valve port and a movable valve member urged to an open position free of said port by a flow of fluid through said line and manually operable means for moving said valve member against said port to prevent flow of fluid therethrough, whereby actuation of both manually operable means for the inlet and exhaust valves simultaneously may actuate said fluid motor to bring said pressing members to a pressing position and a supplemental exhaust valve in the exhaust line having a valve port and a movable valve member urged to closed position by the flow of fluid through said line to permit release of the manually operable means for opening said inlet valve and the manually operable means for closing said primary exhaust valve while the fluid flow opening of said inlet valve and the fluid flow closing of said supplemental exhaust valve function to permit further actuation of said fluid motor to apply said pressure, and manually operable means for moving said supplemental exhaust valve member away from said port to permit flow of fluid therethrough to evacuate said fluid motor on release of the manually operated valve closing means for the primary exhaust valve and means to vary the movement of said movable inlet valve member.

l. Ina pressing machine, relatively movable pressing members, actuating 'means including a fluid motor for relatively moving said members to a pressing position, an inlet line for said fluid motor, an outlet line for said fluid motor, an inlet valve in the inlet line having a valve port and a movable valve member urged to a position closing said port by a rapid flow of fluid through said line, manually operable means for moving a said valve member away from said port to permit flow of fluid therethrough, said valve member being capable of being retained in an open position by a diminished flow of fluid there through, an exhaust valve in the exhaust line having a valve port and a movable valve member urged to an open position free of said port by a flow of fluid through said line and manually operable means for moving said valve member against said port to prevent flow of fluid therethrough, whereby actuation of both manually operable means for the inlet and exhaust valves simultaneously may actuate said fluid motor.

5. In a pressing machine, relatively movable pressing members, actuating means including a fluid motor for relatively moving said members to a pressing position and thereafter applying pressure, an inlet line for said fluid motor, an outlet line for said fluid motor, an inlet valve in the inlet line having avalve port and a movable valve member urged to a position closing said port by a rapid flow of fluid through "said line,

manually operable means for moving said valve member away from said port to permit flow of fluid therethrough, said valve member being capable of being retained in an open position by a diminished flow of fluid therethrough, a primary exhaust valve in the exhaust line having a valve port anda movable valve member urged to an open position free of said port by the flow of fluid through said line and manually operable means for moving said valve member against said port to prevent flow of fluid therethrough, whereby actuation of both manually operable means for the inlet and exhaust valves simultaneously may actuate said fluid motor to bring said pressing members to a pressing position and a supplemental exhaust valve in the exhaust line having a valve port and a movable valve member urged to a closed position by the flow of fluid throughsaid line and normally inoperable manually operable means for moving said valve member away from said port to permit flow of fluid therethrough to evacuate said fluid motor onirelease of the manually operated valve closing means for the primary exhaust valve and means actuated by said actuating means substantially as said pressing members have been brought into pressing juxtaposition to free said normally inoperable manually operable means for said movable supplemental exhaust valve member to permit fluid flow closing of said supplemental exhaust valve and to permit release of the manually operable means for opening said inlet valve and the manually operable means for closing said primary exhaust valve while the fluid flow opening of said inlet valve and the fluid flow closing of said supplemental exhaust'valve function to permit further actuation of said fluid motor to apply said pressure and actuation at will of said manually operable means to open said supplemental exhaust valve for exhausting said fluid motor.

6. .In' a pressing machine, relatively movable pressing members, actuating means including a fluid'motor for relatively moving said members to a pressing position, an inlet line for said fluid motor, an outlet line for said fluid motor, an in-, let valve in the inlet line having a, valve port and a movable valve member urged to a position actuate saidfluid motor to bring said pressing members to apressing position and a supplemental exhaust valve in the exhaust line having a valve port and a movable valve member urged to a closed position by the flow of fluid through said line and normally inoperable manually operable means for moving said valve member away from said port to permit flow of fluid urged to a position closing said port by'a flow of fluid through said line, manually operable meansfor moving said valve member away from said port to permit flow of fluid therethrough, a primary exhaust valve in the exhaust line having 'a valve port and a movable valve member urged to an open position free of said port by the flow of fluid through said line and manually operable means for moving said valve member against said port to prevent flow .of fluid therethrough,

whereby actuation of both manually operable means for the'inlet and exhaust valves simultaneously may actuate saiclfiuid motor to bring said pressing members to a pressing position and a supplemental exhaust valve in the exhaust line having a valve port and a movable valve member urged to a closed position by the flow of fluid through said line and normally inoperable manually operable means for moving said valve member away from said port to permit flow of fluid l therethrough to evacuate said fluid motor on retherethrough to evacuate said fluid motor on release of. the manually operated valve closing means for the primary exhaust valve and means actuated by said actuating means substantially.

as said pressing members have been brought into pressing juxtaposition to free said normally inoperable manually operable means for said movable supplemental exhaust valve member to permit fluid flow closing of said supplemental ex-' haust valve and to permit release of the manually operable means for opening said inlet valve and the manually operable means for closing said primary exhaust valve while said fluid mo- .tor continues to apply pressure during the pressing operation and actuation at will of said manually operable means to open said supplemental exhaust valvefor exhausting said fluid'motor.

lease of the manually operated valve closing means for the primary exhaust valve and means actuated by said pivoted fluid cylinder substantially as said pressing members have been brought into pressing juxtaposition to free said normally inoperable manually operable means for said movable supplemental exhaust valve member to permit fluid flow closing of said supplemental exhaust valve and to permit release of the manually operable means for opening said inlet valve and the manually operable means for,

closing said primary exhause valve while said fluid motor continues to apply pressure during the pressing operation and actuation at will of said manually operable mean to open said supplemental exhaust valve for exhausting said fluid motor.

\ 8. In a pressing machine, relatively movable pressing members, actuating means including a fluid motor for relatively moving said members to a pressing position, an inlet line for said fluid qnotor, an outlet line for said fluid motor, a fluid flow closable manually openable inlet valve in the inletline, a fluid'flow openable manually closable exhaust valve in the exhaust line,-whereby manual opening of said inlet valve and manual closing of said exhaust valve may cause a flow oi fluid to said fluid motor and a supplemental fluid flow closable manually openable exhaust valve in the exhaust line to permit-flow of fluid through both saidexhaust valves to evacuate said fluid motor to separate said pressingmembers on manual opening of'said supplemental exhaust valve.

9. In a pressing machine, relatively movable pressing members, actuating means including .a

fluidmotor for relatively moving said members to a pressing position, a control line for said fluid motor connectable to a source of fluid pres-5 sure supply having a branch extending down-i wardlyto said cylinder, a fluid flow closable manually openable inlet valve in the inlet portion of said line in tremor said cylinder branch,

a fluid flow openable manuallyclosable exhaust valve in the exhaust portionof said line beyond said cylinder branch, whereby manual opening of said inlet valve and manual closing of said exhaust valvemay cause a flow of fluid to said fluid motor to bring said pressing members in pressing juxtaposition and a supplemental fluid flow closable manually openable exhaust valve in the exhaust portion of said line to permit flow of fluid through both said exhaust valves on the manual actuation thereof to evacuate said fluid motor.

10. In a pressing machine, relatively movable pressing members, actuating means including a fluid motor to relatively move said members to a pressing position, a control line for said fluid motor comprising a line connectable to a source of fluid pressure supply having a branch extending downwardly to said cylinder, three handle operated control valves mounted in said line each comprising a valve chamber having a partition having a port therein dividing said chamber into an inlet chamber and an outlet chamber, a socket projecting towards said port in one of said chambers and terminating at a spaced distance there from and having a plurality of perforations in the wall thereof adjacent the base thereof, a valve reciprocatable in said socket to and from positions closing said port and a valve stem oper- 7 able from without said chamber to abut and move said valve relative to said port; one of said valves being closable by the flow through said line and being mounted in the inlet portion of said line in front of said cylinder branch, with the inlet chamber underneath and having the socket projecting upwardly therein, and the valve stem thereof projecting upwardly from said outlet chamber and having an operating button on the upper end thereof to lower said valve stem to abut said valve to free it from the chamber port to open said valve and spring means normally raising said valve stem free of said valve, said valve being retainable by gravity in an open poi -thereof projecting upwardly from said outlet chamber and having an operating button on the upper end thereof to lower said valve stem to abut said valve to seat it firmly on said chamber port and spring means normally raising said valve inlet chamber thereof to permit fluid flow in said line to urge the valve to a position closing said port and with the valve stem thereof reciprocatable to move said valve from said port and spring means normally urging said valve stem free of said ball valve, and a handle to move said valve stem to move said valve from said port.

11. A control valve comprising a valve chamber having a partition having a port therein dividing said chamber into an inlet portion and an outlet portion, a socket projecting toward said port in said inlet portion and terminating at a spaced distance therefrom and having a passage from said portion in the wall thereof, a valve reciprocatable in said socket beyond said passage to and from positions closing said. port, normally positioned by gravity in a position away from said port, and a valve stem operable from without said chamber to abut and move said valve away from said port, said valve being of such a weight as to be moved by the flow of fluid in said socket to close said port, said lower chamber also having means projecting upwardly within said socket to regulate the reciprocatable movement of the valve in said socket and hence the velocity of flow to which it responds.

12. In a pressing machine, relatively movable pressing members, actuating means including a fluid motor for relatively moving said members to a pressing position, an inlet line for said fluid motor, an outlet line for said fluid motor, an inlet'valve in the inlet line having a valve port and a movable valve member urged to a position closing said port by a rapid flow of fluid through said line, manually operable means for moving said valve member away from said port to permit flow of fluid therethrough, said valve member being capable of being retained in an open position by a diminished flow of fluid therethrough, an exhaust valve in the exhaust line having a valve port and a movable valve member urged to an open position free of said port by a flow of fluid through said line and manually operable means for moving said valve member against said port to prevent flow of fluid therethrough, whereby actuation of both manually operable means ,for the inlet and exhaust valves simultaneously

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