US2148085A - Pressing machine - Google Patents

Description

Feb. 21, 1939.

H. E. PAGE PRESSING MACHINE Filed March 5, 1936 2 Sheets-Sheet 1 INVENTOR.

Feb. 21, 1939. H. E. PAGE 2,148,085

PRESSING MACHINE Filed March 5, 1956 2 Sheets-Sheet 2 INVEN TOR.

Patented Feb. 21, 1939 I UNITED STATES PATENT OFFICE 11 Claims.

This invention relates to garment and. laundry pressing machines.

One of the primary objects of this invention is to provide simple and efficient means for applying power to operate a pressing machine by having the power impulses automatically follow the natural movements of thepressing machine operator,

v Two classes of pressing machines of the various types in use are known as (1) power presses in which the mechanism of the press is actuated by power means, and (2) foot presses in which the press mechanism is actuated by operator-operated means.

The power press has the advantage as compared with the foot press in avoiding fatigue of the operator, speeding up the work and producing heavier pressure for pressing purposes.

On the other hand, the foot press has the advantage of feel, delicacy of control, and the skilled operator can accomplish with a foot press intricate pressing operations which would be impossible with the ordinary power press.

The primary object of this invention is to provide a power press, the operation of which, as far as the operator is concerned; is the same as a foot operated press, since the power follows the operators desires and movements during his natural operation of the press and accomplishes for him 39 all the movements of the press and pressing operations by power means, thus relieving the Up? erator of all the fatigue of operating a foot press yet retaining all of the natural delicacy of control of the foot operated machine, in short,

a pressthat has all the advantages of foot and power presses with none of the disadvantages.

Another object of this invention is to provide a simple and eflicient means for quickly converting this press into a regular manually operated machine in which it is unnecessary for the op.- erator to move any of the power actuated mechanism when operating the press, therefore making the press as easy to operate as any regular foot press.

Another object is to prevent danger of injury to the operator by making it impossible to operate the foot pedal of the press by power and having it strike the operator during such operation.

5 Another object is to provide means for quickly converting this press into a regular power press.

A further object is to provide a press which can be operated very easily by the foot and yet have the travel of the foot pedal very small, so

55 that it is unnecessary for the operator to lift his foot high each time he operates the press with consequent injury through constant operation.

Referring to the drawings:

Figure 1 is a side elevation with part of the frame cut away to expose the mechanism, show- 5 ing the press in an open position.

Figure 2 is a similar view showing the press in a closed position.

Figure 3 is a horizontal section upon the line 3-3, Figure 1. 10

Figure 4 is a piping diagram of the air control system using a single acting piston.

Figure 5 is a view similar to Figure 4 using a double acting piston.

In the drawings, l is the frame upon a vertical 15 projection of which is pivotally mounted at 2 the head carrying arm 3; at the forward end of the arm 3 is mounted the head t and the rear end of the arm 3 is connected by means of the link ii to the upwardly extending arm t of a bell 20 crank lever composed of the arms 6 and t pivotally mounted at l to the frame I] (Figures 1 and 2).

The buck 9 is mounted on a vertical projection, bolster or goose neck on the frame l in such a position that rocking the arm 3 in a counter-clockwise direction about the pivot 2 will bring the head 4 in contact with said buck 9 (Figure 1).

Also, pivotally mounted ati to the frame i is 30 a foot operated lever ill and a power operated lever II; the forward end of the lever iii is pro vided with a foot treadle i2, and the forward end. of the powerlever Ii is connected at i3 to the piston rod M of the cylinder it, said cylinder 3 being mounted at I6 to the frame 41 (Figures 1 and 2). Retracting springs ii, iii and it are attached to the arm 8 and the levers Ill and I i respectively and tend to maintain said arm 8 and levers Hi and II against their respective stopstii, 2| and 22 in the position as shown by the full lines in Figure 1.

The forward end of the arm 8 has a vertical projection having a surface 23, said surface being made on a radius swung from the center of the pivot I and is adapted to engage under conditions presently described, with the roller 24 which is mounted so that it can both rotate and move longitudinally in the slot 25 of the lever 26, said lever 26 being pivotally mounted at 21 on the member 28. The roller 24 engages with the surface 39 of the member 28 at all times (Figures 1 and 2).

A retracting spring 29 acts to keep the lever 26 in the position, as shown in Figure 1, with the roller 24 at the rear end of the slot 25 (Figure 1).

The member 28 is pivotally mounted on the frame I at 48 and a retracting spring 38 attached to said member 28 tends to keep it up against the stop 3| and thus allows the arm 32 of a bell crank lever pivotally mounted on the frame I at 33, to engage with the horizontal projection 34 of the member 28 and therefore hold said member 28 in the position, as shown in Figure 1.

The other arm 35 of the bell crank lever is connected by a link 36 to release pedal 31 pivotally mounted at 38 on the frame I, and it will be noted that depressing the forward end of the release pedal 31 will rock said pedal on the pivot 38 in a counter-clockwise direction, raising the link 36 and the arm 35 of the bell crank lever, and thus causing the other arm 32 to move downward and the member 28 to swing to the left (Figure 2) and the projection 34 to follow the end of the arm 32 engaged therewith. This movement of the member 28 releases the holding or wedging effect on the roller 24 which locks the press closed, and hence permits the press to open.

The arm 8 has two horizontal projections 4| and 42 which are adapted to engage with the levers l and II respectively, and pivotally mounted at 43 on the arm 8 is the locking member 44, said member being adapted to engage with the surfaces 45 and 46 on the levers l0 and II (Figure 3).

A hand lever 41 is mounted at the rear of the 'member 44 and it is apparent that with the looking member 44 in the position, as shown by the full lines in Figure 3, said member will lock the arm 8 and the levers I8 and II together and prevent them from moving independently about the pivot 1. However, if the locking member 44 is rotated in a counter-clockwise direction about the pivot 43 until said member 44 rests against the stop TI on the lever I, assuming the position as shown by the short dotted lines in Figure 3, then the member 44 will look only the arm 8 and the lever I together, leaving the lever l8 free; in like manner if the locking member 44 is rotated in a clockwise direction about the pivot 43 until said member 44 rests against the stop 10 on the lever |8 assuming the position, as shown by the long dotted lines in Figure 3, then the member 44 'will lock only the arm 8 and the lever l0 together, leaving the lever free for purposes described later.

The member 44 is provided with cam surfaces 48 and 49 which are adapted to engage with the end of the valve stem 58 of the shut-off valve mounted on the arm 8 and moving the member 44 to either of the positions, as shown by the dotted lines in Figure 3, will engage one or the other of the cam surfaces 48 or 49 with the end of the valve stem 58 and force said valve stem 50 to the left against the action of the internal spring 52 (shown in Figure 4) and thus close the shut-off valve 5| (Figure 3).

It will therefore be apparent that the shut-off valve 5| will be in an open position only when the locking member 44 is in the position as shown by the full lines in Figure 3.

The locking member 44 is also provided with a cam 85 which is adapted to engage with the valve stem 12 of the shut-off valve 66 mounted on the lever The shut-off valve 66 works in a reverse manner from the shut-off valve 5| in that when the cam 65 engages with the valve stem 12, such engagement being caused by rocking the locking member 44 until said member rests against the stop II, as shown by the closely dotted lines in Figure.3, then the cam 65 forces the valve stem 12 into the body of the valve 66 against the action of the internal spring 73, shown in Figure 4, thus opening the shut-off valve 66 (Figure 3).

Therefore the shut-off valve 86 will be in an open position only when the locking member is in the position as shown by the closely dotted lines in Figure 3.

An operating valve 53 is mounted at the forward end of the power lever II and the valve stem 54 of said operating valve 53 is normally held in the position against the action of the internal spring 14, shown in Figure 4, as shown in Figure l by the surface 55 of the vertical projection 56 of the lever I, thus keeping the valve 53 closed (Figure l).

The operating valve 53 is connected by means of the pipe 51 to a suitable air pressure supply, and said valve 53 also has a port opening at 58 to the atmosphere. A pipe 59 connects the operating valve 53 with the shut-off valve 5| and another pipe 60 connects the shut-off valve 5| with the cylinder 5, therefore, if the shut-off valve 5| is closed, it makes the operating valve 53 inoperative (Figures 1 and 4).

A hand lever 64 is pivotally mounted on the frame at 18 and is adapted to engage with the inlet valve 62 and the exhaust valve 63, which are of the self-closing type. The inlet valve 62 is connected to a suitable air supply and also by means of the pipes 61 and '15 to the shut-off valve 66 (Figures 1 and 4), said shut-off valve 66 being connected to the cylinder 5 by means of the pipe 16; and the exhaust valve 63 is connected to the atmosphere and also by means of the pipes 68 and 15 through the shut-off valve 66 to the cylinder l5, and it is therefore obvious that depressing the hand lever 64 will admit air, providing the shut-off valve 66 is open, to the cylinder l5 and raising the hand lever 64 will exhaust the air in the cylinder |5 (Figures 1, 3 and 4).

The cylinder I5 is also provided with inlet valve '11 which is connected to a suitable air supply, and exhaust valve 18 and these valves are for use in case the operator desires to operate the cylinder I5 for any reason, when both shut-off valves 5| and 66 are closed.

It will now be apparent that if the operator depresses the pedal |2 slightly overcoming the slight resistance of the returning spring l8, it will cause the lever l0 to move downwardly against the horizontal projection 4| on the arm 8; this movement of the lever I0 causes the vertical projection 56 and also the surface 55 to move away from the valve stem 54 of the operating valve allowing said valve stem to be pushed forward by an internal spring 14, shown in Figure 4, onto the surface 6|, thus causing the operating valve 53 to connect the air pressure supply through pipe 59, shut-off valve 5| and pipe 60 to the air cylinder l5 (Figures 1 and 4).

The air pressure will force the piston and piston rod. 4 downwardly, thus moving the power lever downward and, if the operator allows the lever H] to remain stationary, the valve stem 54 of the operating valve 53 carried by the lever U, will then move along the slanting surface 6| until it reaches a point where the operating valve 53 will shut off the air supply from the pipe 51 at which point the lever II will tend to cease movement. However; if the operator now depresses the pedal l2 still further carrying the lever in with it, the same operation just described will takeyplace and the power lever II will tend to follow the downward movements of the foot pedal l2 and the lever i (Figures 1 to overcome'the slight tension of the retracting spring l8 and by keeping ahead of the movement of the power lever ii andthus keeping a the operating valve 53 continuously open during such movement (Figures 1 and 2).

If he desires to stop the press at any point on the way fromithe full open position to the full closed position, he then reduces'the pressure he is applying on the lever l0 through the loot pedal l2 and allows the power lever II to catch up with the lever l0, thus cutting'oif the power and stopping the movement of the power lever H, as described'a'bove. I

In like manner, when the operator removes. the downward pressure from the foot pedal i2 and allowsthe retracting spring I8 to raise the lever it, thus raising the vertical projection 58 with respect to the lever ii and forcing the surface 55 to move the valve stem 54 of the operating valve 53 to the right, thus opening the port 58 and allowing the air pressure in the cylinder IE to escape to the atmosphere, then the retracting spring I!) will raise the power lever ii to a point in relation to the lever ll where the valve stem 54 will again reach a point of balance between the surfaces 55 and SI; In other words, due to the action of the surfaces 6! and 55 acting on the valve stem 54 of the operating valve 53, the air pressure admitted and released from the cylinder It acting through the piston rod it will tend to move the: power lever it in a' direction in direct relation to the movement of the lever-it (Figures 1,2 and. it).-

Since the lower edge of the power lever ii rests-against the horizontal projection d2 of the arm 3 with no play between it and the looking member 44 mounted on the arm 8 engages with the surface 46 of the upper edge of the power lever ll, it is obvious that with the parts in the position as shown by the full lines in Figure 3, any movement of the power lever Ii is transmitted directly to the arm 8 and'through the arm 6 and the link to the head carrying lever 3, thus operating the press mechanism (Fig-- ures 1, 2 and 3).

Therefore, in order to operate this press,- the operator merely operates the foot pedal the same as an ordinary foot power or manual press with the same delicacy of control yet all theac'tual effort of moving the press mechanism and pro-- ducing the pressure for pressing is all accomplished by power.

When it is desired to operate the press as a regular power'press, the locking member 44 is swung in a counter-clockwise direction about the pivot 43 by means of the hand lever 41 until the'member 44 assumes the position against the stop II, as shown by the closely dotted lines in t Figure 3, in which position it will lock the arm 8' and the lever I togetherand release the lever l0 and will alsoclose the shut-off valve 5|, as previously described, (Figure 3).

Since the shut-off valve 5|. controls the air flow from the. operating valve 53 to the cylinder III "the operating valve il'n'owhas no control over the action of the cylinder ll (Figure 4).

The press can now be operated by any regular power control means such as-the hand lever 84, which operates the valves 62 and 63, as previously explained, and sincethe lever in has been released by the locking member 44 the returning spring l8 will keep the lever l0 and the-foot pedal l2 against the stop 2| during the operation of the press as a regular powerpress, and thus avoid injury to the operator by coming in contact with the foot pedal l2 if it moved up and down during such operation.

Thus moving the locking member 44 in a M counter-clockwise direction against the stop ll shuts off the operating valve 53 by means of the shut-oil? valve' 5|; releases the foot lever ill and converts the press into a power press.

If thelocking member 44 is swung in a clockwise direction about the pivot 43 until it is in a position as shown by the long dotted lines in Figure 3, against the stop 10, thetmember 44 will then release the power lever II and lock the arm 8 and the lever I0 together and will $5 also close the shut-off valves 5i and 66, as previously described (Figure 3). s a

The press can now be operated as a regular foot power press by means of the foot pedal i2, and it will be noted that it is now impossible w to operate the press by either the operating valve 53 or the hand lever 64, therefore, it will be impossible for the operator to injure himself by the inadvertent operation of either of these controls with consequent movement of the foot lever 112 by power means (Figure 3).

A hand shut-oil control valve 69 is also provided so that while the operator is using the press with the power follow-up feature. in operation. he can graduatethe flow, or, if desired,

will cause the armt. to swing in a oounter-clock- W wise direction aboutthe pivot l and thus cause the lower end of the surface 23 at the end of the arm 8 to move downwardly and engage with the roller 24; said engagement and downward motion cause the roller 24 to be pushed downward along the M surface 39 until a point is reached due to the gradual widening of the space between the surface 24 and the surface 739 until the roller 24 can slip up past the lower edge of the surface 23 onto said surface and the action of the spring 29 on a the arm 26 will tend to keep the roller 24 wedged between the surfaces 39 and 23 (Figures 1 and 2).

As soon as the arm 8 attempts to move upwardly, after the roller 24 has become lodged between the surfaces 39 and 23, in a position, such 30 as shown in Figure 2, then the surface 23 causes the roller 24'to jam tightly between the surfaces 23 and 39 and. prevent any movement in an upward direction, thuskeeping the pressing mechanism locked in 'anyrposition desired and main- .3

taining any desireddegree'of pressure existing between the pressing surfaces of the head and buck.

When the operator wants to release the press from the locked position just described, this can be accomplished by depressing the release pedal 31 and releasing the member 28 as previously described. The pressure of the surface '23 on the roller. 24is transmitted to the surface 39 of the member 28 and causes this member, when released, to swing in a counter-clockwise direction 1 'roller 24 gets between the surfaces 28 and 28 and the press will be held in that position until released: this is important in many pressing operations that require'little or no' pressure between the pressing surfaces, as it is not necessary to lock this press under heavy pressure in order tohave it stay closed and the operator can bring the press head down to any desired position by a light pressure on the foot pedal l2, using the power aiding mechanism controlled by the operating valve 58 and can then leave it there, and, although removing his foot from the foot pedal i2 will allow the air to exhaust from the cylinder, as previously described, the press will be held in the desired position by the action of the roller 24 (Figure 2).

If it is desired to pat" the work being pressed, that is, bring the head down upon the work lightly many times with a patting motion, the operator can use the power air control mechanism by means of the foot pedal i2 and the operating valve 58 for this purpose and can keep the release pedal 81 depressed and then the locking mechanism, just described, will be inoperative as the roller 24 cannot become wedged between the surfaces 28 and 88 as the member 28 is then free to rock in a counter-clockwise direction, and thus allow the surface 28 to slide easily past the roller 24 in either direction.

In Figure 4 is shown diagrammatically the air control system used in the press shown in Figures 1 and 2, using a single acting cylinder l5. When the valve stem 54 of the operating valve 58 is moved to the left, the double pistons 88 and 8| move from the position, as shown by the full lines to that shown by dotted lines, allowing air under pressure to pass through the air supply pipe 51, through the valve 58 and the pipe 88 through the shut-off valve 5! and the pipe 88 to the cylinder i5 thus causing the piston rod l4 to move downwardly. When the valve stem 54 of the operating valve 58 is moved back again to the right, as shown by the full lines, then the air supply through the pipe 51 is stopped by the piston 88 and the port 58 is opened by the piston 8i, and now the air trapped in the cylinder l5 can pass back through the pipe 88, the shut-ofi valve 5| and the pipe 58 through the port 58 to the atmosphere. If, however, the valve stem 58 of the shut-oil valve II is moved to the left, as shown by the dotted lines, then the piston 82 covers the opening leading into the pipe 88 and makes the operating valve 52 inoperative (Figure 4).

Figure 4 also illustrates how the shut-off valve 88 works in an opposite manner to the shut-ofi valve 5|. The normal position of the shut-off valve 88 is closed, as shown by the full lines in Figure 4; however, when the valve stem 12 of the valve 88 is moved to the left, as shown by the dotted lines, then the piston 88 uncovers the ports in the valve and allows a free passage of air through the pipe I5 to the pipe 18, and it will be obvious from referring to Figure 1 that the hand lever 84 can not operate the press by power means, if the valve 88 is closed, since said valve 88 is connected in series between the valves 82 and 88 and the cylinder l5 by means of the pipes I5 and 18.

Figure 5 illustrates diagrammatically the air controlsystem using a double acting cylinder 84 instead of the single acting type. as shown in Figure 4. In the double acting type, the operating valve 81 has two pistons 85 and 88; Moving the valve stem 88 to the left allows air under pressure to enter from the pipe 88 into the pipe 88 through the double shut-oi! valve 8i and through the pipe 82.to the top of the double acting cylinder 84; at the same time, the movement of the valve stem 88 and its pistons to the left also allows-any air in the lower part of the cylinder 84 to escape through the pipe 88 and through the double shut-ofl' valve 8i and the pipe 84 and out the port 85 to the atmosphere, thus causing the piston rod 88 to move downwardly (Figure 5).

In like manner, if the valve stem 88 with its pistons85 and 88 is moved to the right, then the air supply pipe 88 will be connected by means of thepipe 84 through the double shut-oil valve 8| and the pipe 83 to the lower end of the cylinder 84 and at the same time, the upper end of the cylinder 84 will be connected through the pipe 82 and the valve 8i and the pipe 88 to the atmosphere through the port 81, causing the piston rod 88 to move upwardly, (Figure 5).

It will be obvious that moving the valve stem of the double shut-oil? valve 8i to the left will also move the double pistons 88 and 88 to the left, closing the ports leading from the pipes 88 and 84, thus making the operating valve 81 inoperative.

.The double pistons of the valve 81 are shown as covering both ports leading from the pipes 88 and 84.

Although this machine has been heretofore described in more or less specific mechanical terms, it will be understood that the invention is broader than the structure specifically described. The cylinder and piston 14 and I5 constitute, in its general aspects, one form of motor which is energized and de-energized; the toggle links 5, 8, arms of the head carrying lever 3, and the lever arm 8, are motion transmitting connections between the motor and the movable element or head 4 of the press; the lever arm 8 is a part or lever of these motion transmitting connections. The valve 58, in its broader aspects, is a control for controlling the energization and de-energization of the motor; the pedal l2, an operator-operated means for effecting the actuation of the control; the projection 58 on the operator-operated member or pedal lever i 8 is means for efiecting the operation of the control 58; this control 53 is operated into position to energize the motor upon partial operation of the operator-operated member ID to permit energization of the motor and also to operate the control 58 to de-energize the motor, when the motion transmitting part or lever H, which carries the control part, has moved a distance corresponding to the movement given the operating lever i8. The shoulder 4i on the motion transmitting part or lever 8 serves to permit the press to be operated solely as a foot press or to operate in case the power fails. The shiftable member 44 serves to cut out the control part 53, so that the press can be operated as a foot press, and it also is a shiftable part to cut in another control member 88 so that the press can be operated by the manual 84. The roller 24 coactlng with the surface 28 on a projection on the lever 8 and the opposing surface 88 of the part 28 constitute in effect, an over-running or roller clutch located remote from the pivot I, this serving to lock the press closed.

The foregoing is pointed out in orderthat it may be understoodthat the invention is not limited to the specific structure shown.

What I claim is:--

1. In a pressing machine, cooperating pressing elements having relative movement, mechanism for effecting said relative movement comprising a motor, motion transmitting connections including a part actuated by the motor, a control for governing the energization and de-energization of the motor, means, including an operator-operated member, for eifecting the actuation of the control into any one of'a plurality of successively operated positions between starting and full operated positions, depending upon the amount of movement given the operator-operated member, to cause energization of the motor in any one of said positions, and means operated by said motor actuated part, when moved into any one of a plurality of positions between starting and full operated positions and corresponding to the position to which the former means has been moved for operating the control to deenergize the motor, when the motor actuated part has been actuated an amount corresponding to the former means.

2. In a pressing machine, cooperating pressing elements having relative movement, mechanism for effecting said movement including a motor, and motion transmitting connections, including a part actuated by the motor, a control member movable with said part for governing the energization and de-energization of the motor, an operating member movable into any one of a plurality of positions between starting and full operated positions and having means for controlling the operation of the control member to energize the motor upon actuation of said operating member and to de-energize the motor, when operated into any one of said plurality of positions, when the motor has actuated said part an amount corresponding to the amount of movement of the operating member.

3. In a pressing machine, cooperating pressing elements having relative movement, mechanism for effecting said movement comprising a motor, and motion transmitting connections actuated by the motor including a part actuated by the motor, a control member movable with said part for governing the energization and de-energization of the motor, an operating member having means to control the operation of the control member to energize the motor upon actuation of said operating member and to de-energize the motor, when the motor has actuated said part an amount corresponding to the amount of movement of the operating member, said part and operating member having follow-up movement, each relative to the other, the follow-up movement of the operating member relative to said part when the part is stationary serving to operate the control member to energize the motor and the follow-up movement of said part, when the operating member is stationary, operating the control to de-energize the motor.

4. In a pressing machine, cooperating pressing elements having relative movement, mechanism for effecting said movement comprising a motor, and motion transmitting connections actuated by the motor including a part actuated by the motor, a control member movable with said part for governing the energization and deenergization of the motor, an operating member having means to control the operation of the control member to energize the motor upon actuation of said operating member and to deenergize the motor, when the motor has actuated said part an amount corresponding to the amount of movement of the operating member, said part and operating member having followup movement, each relative to the other, the follow-up movement of the operating member relative to said part when the part is stationary operating the control member to energize the motor and the follow-up movement of said part when the operating member is stationary operating the control to de-energize the motor, said part being a lever, and the operating member being a pedal lever arranged alongside the former lever, the control member being carried by said former lever, the pedal lever having means for operating the control member.

5. In a pressing machine, cooperating pressing elements having relative movement, mechanism for efiecting said movement comprising a motor, and motion transmitting connections actuated by the motor including a part actuated by the motor, a control member movable with said part for governing the energization and deenergization of the motor, an operating member having means to control the operation of the control member to energize the motor upon actuation of said operating member and to deenergize the motor, when the motor has actuated said part an amount corresponding to the amount of movement of the operating member, said part being a lever, and the operating member being a pedal lever extending alongside said part arranged to have a follow-up movement relative to the pedal lever, and the pedal lever a follow-up movement relative to said part, the follow-up movement of said part causing the control member to de-energize the motor and the follow-up movement of the pedal lever operating the control member to energize the motor.

6. In a pressing machine, cooperating pressing elements having relative movement, mechanism for effecting said relative movement comprising a cylinder and piston motor, and motion transmitting means actuated by said motor and including a lever, means for transmitting the movement of the piston to the lever, an operating lever extending alongside the first lever, a control valve carried by the first lever for controlling the flow of motive fluid to and from the cylinder, the operating lever having a part normally holding the control valve in closed position and movable, upon operation of the operating lever, to permit the control valve to open, the control valve being movable with the first lever and moving into position to engage said part when the first lever has been actuated an amount corresponding to the amount of movement of the operating lever.

7. In a pressing machine, cooperating pressing elements having relative movement, mechanism for effecting said relative movement comprising a cylinder and piston motor, motion transmitting means actuated by the motor including a lever, means for transferring the movement of the piston to the lever, a pedal lever extending alongside the first lever and movable different distances from starting position, a control valve for controlling the fiow of motive fluid to the cylinder, said control valve being carried by and movable with the first lever, the pedal lever having a part for controlling the opening of the control valve upon partial movement of the pedal lever when the first lever is stationary at any point in its path of movement, and the closing of said valve upon the actuation of the first lever by the piston an amount corresponding to the depression of the pedal lever.

8. In a pressing machine, cooperating pressing elements having relative movement, mechanism for effecting said relative movement comprising a cylinder and piston motor, motion transmitting means actuated by the motor including a lever, means for transferring the movement of the piston to the lever, a pedal lever extending alongside the power lever and movable different distances from starting position, a control valve for controlling thefiow of motive fiuid to the cylinder, said control valve being carried by and movable with the first lever, the pedal lever having a part for controlling the opening of the control valve upon partial movement of the pedal lever when the first lever is stationary at any point in its path of movement, and the closing of said valve upon the actuation of the first lever by the piston an amount corresponding to the depression of the pedal lever, and releasable means for holding the press closed.

9. In a pressing machine, cooperating pressing elements having relative movement, mechanism for effecting said relative movement comprising a cylinder and piston motor, motion transmitting means actuated by the motor including a lever, means for transferring the movement of the piston to the lever, a pedal lever extending alongside the power lever and movable diflferent distances from starting position, a control valve for controlling the fiow of motive fluid to the cylinder, said control valve being carried by and movable with the first lever, the pedal lever having a part for controlling the opening of the control valve upon partial movement of the pedal lever when the first lever is stationary at any point in its path of movement, and the closing of said valve upon the actuation of the first lever by the piston an amount corresponding to the depression of the pedal lever, the control valve being a combined intake and exhaust valve normally arranged to close the intake and open the exhaust valve and operable by the movement of the pedal to open the intake and close the exhaust and by the movement of the power lever to open the exhaust and close the intake.

10. In a pressing machine, cooperating pressing elements having relative movement, mechanism for effecting said relative movement comprising a motor, and motion transmitting means actuated by the motor and including a lever, a foot operated member operable, when operated, to efiect the energization of the motor, a manually operated member operable to control the energization of the motor, and a shiftable member operable to selectively connect the foot operated member and the manually operated member into and out of effective connection with the motor.

11. In a pressing machine, cooperative pressing elements having relative movement, mechanism for effecting said relative movement comprising a motor, motion transmitting means actuated by the motor and including a lever connected to the motor to be actuated thereby, a pedal, 2, control member for the motor operated by the pedal, a manual, a second control member for the motor operated by the manual, and a shiftable member operable into one position to render the first control member operative, and the second control member inoperative, and into another position to render the second control member operative, and the first inoperative.

HERBERT E. PAGE.

Images