US2400639A

US2400639A - Control for power presses

Info

Publication number: US2400639A
Application number: US532604A
Authority: US
Inventors: Wallace F Gayring
Original assignee: Prosperity Co Inc
Current assignee: Prosperity Co Inc
Priority date: 1944-04-25
Filing date: 1944-04-25
Publication date: 1946-05-21
Anticipated expiration: 1963-05-21

Description

May 21, 1946. w. F; GA-YRIN'G 2,400,639

CONTROL FOR POWER PRESSES Filed April 25, 1944 4 Sheets-Sheet 1 e? F|G.I

l2 \\k\ /f f /f gl l :i ,U

so LL FIG.5 A) -J C) INVENTOR d 0 L WALLACE EGAYRING j a 3 BY 3 9L @im (39 I ATTORNEYS.

May 21, 1946. w. F. GAYRING 2,400,539

CONTROL FOR POWER PRESSES Filed April 25, 1944 4 Sheets-Sheet 2 FIG. 2

INVENTOR.

WAL L A CE F. GAYRING ATTORNEYS.

May 21, 1946# v .w. F. GAYRING 2,400,639

CONTROL FOR POWER PRESSES Filed April 25, 1944 4 SheejlZS-Sheel'I 3 INVENTOR.

WALLACE F. GAYRlNG ATTORNEYS.

May 21, 1946. w. F. GAYRING 2,400,639

CONTROL FOR POWER PRESSES Filled April 25, 1944 4 Sheets-Sheet 4 J m In E? Q' al `Y o f @im imi t -lif E :o r- F a In iL ,i

'nnrdall INVENToR. WALLACE E GAYRI NG AITQRNEYS Patented May 21, 1946 UNITED STATES PATENT 'OFFICE 2,400,639 a CONTROL FOR POWER PRESSES Wallace F. Gayring, Minoa, N. Y., assignor to The Prosperity Company, Inc., Syracuse, N. Y., a corporation of New York Application April 25, 1944, Serial No. 532,604

1 Claim.

to the accompanying drawings, in which like characters designate corresponding parts in all the views. Y

Figure 1 is an elevation of this machine, when open, with a cabinet shown in section. Figure 2 is a side elevation showing the position of the movable shield when the press is f closed.

at a uniform temperature and humidity or air conditioned, and also means for insulating the heat or confining it by far for the most part. i

within the cabinet during the closing and opening of the machine.

The invention also has for its object a safety control consisting of a single operator-operated member, as a manual, which, to effect the closing of the press, is but momentarily operated,` together with a member, as a heat shield which moves with the movable pressing element or head as the press closes and which controls means for de-energizing the actuating means effecting the closing of the press, if the shield encounters an obstruction, all whereby the operator merely momentarily operates the manual Figure 3 is a fr'ont elevation, partly in section, of the machine shown in Figure 1, that is,'when the press is. open.

Figure 4 is a diagrammatic view showing the control and actuating mechanisms for the movable shield guard and the movable pressing element .or head.

Figure 5 shows arrangement of three presses tended by one operator.

This machine comprises, generally, mechanism for carrying out an underlying new method of operation of a machine which is enclosed in a. heat insulated cabinet, this method consisting in the operator merely momentarily operating a manual, which controls power actuating means effecting the movement of a shield telescoping within the hood of the cabinet downwardly over the lower pressing element or buck, and in so doing, effecting the actuation of power to a power actuating means, which effects the closing movement of the press head slowly to follow up the 0 shield therewith but slightly behind the front out of this position, as the press closes, this being preferably used with and'operated by the shield. It may be used with or without the cabinet and the shield.

Safety controls for machines of this type have, for themost part, heretofore been two hand controis' which required the operator to holdl two manuals depressed unti1 the press closed. This operation permitted a quick closing of the press head but required that the operator stay at the machine and hold down the two manuals until the press did close. The operators time, however, -is a greater desideratum than the operating time of the press, especially where the operator attends more than one machine and passes immediately from one machine, after operating its manual to close the press, to another machine.

The invention consists in the novel features Indescribing this invention, reference is had edge of the shield toward `closed position, and automatically disabling the motor of the actuating means, if the shield comes in contact with an obstruction, as the hand of the operator attempting to smooth out the garment on a lower pressing element or buck at the last moment.

The invention consists broadly and more or less' speciiically in mechanism for carrying out this method, and if desired, heat insulating the hot head by a curtain guard normally extending across the face of the hot head and `movable by the closing movement of the shield out of its normal position, this guard protecting the operator -from coming in contact with the hot head when arranging an article on the lower pressing element and also protecting him from heat radiating from the head, when the press is open.

The pressing machine embodying the illustrated form of the invention comprises, generally, in its entirety, a suitable frame, a heat insulated cabinet, enclosing the frame, cooperating pressing elements, as upper and lower elements having a relative opening and closing movement, one, as the lower pressing element or buck being carried by the frame outside the cabinet, the upper pressving element-for head having the opening Vand closing movement; the cabinetincluding a 'stationary hood enclosing the pressing element or l head when the head is in upward or open position, ashield movable into and out of the hood and also including the movable pressing element,

this shield being open at its front and rear sidesl f but closed at its lateral sides and top and movable out of the hood to formv an extension ofthe' hood during the closing of the press, aheat insulating guard or curtain normally closing the Lfront open side of the shield and extending across the pressing face of the head. the guard being controlled'in itsmovement by the shield during themovement of the shield out of the hood to ment` of the head 4 is further uncover the pressing face, power actuating means for the shield, power'actuatingmeans' for the press head controlled in its operation by the movement of the shield actuating means, and means controlled by the shield when it is obstructed' during the closing movement of the press to disable the' power actuating means for the press head, 'and a single/operating member for initiating the -ow of power to the actuating' means for the shield.- Some .of the be omitt'edf designates the vframe of the pressing machine; 2 the lower pressing element orA buck elements may mounted on the frame above-a horizontaltable 3 on the top forward side of the frame. 4- designates the movable press head, this being, 'here shown as carried by the forward arm of a lever 5 pivotally mounted between its ends at 6 'on an upright 1 rising from the'frame I. The head 4,

however, may be carriedin any suitable manner.

during this movement, the ysprings I6 are addltionally loaded. As seen in Figure 3, these springs areV connected to the opposite ends of atx-ans-v verse -rod I 8 at the lower end of the guard or curtain I2 and at I6 to the hood.v

During the closingmovement of the shield III,vr the press head 4 follows up the,v shield andj its pneumatic motors, aslcylinders and pistons. I9.

designates the cylinder and 20 the piston ofthe motor for operating the shield I0. This motor is mounted tov have' a oating'. or bodily shifting movement under the reaction .of the air in the cylinder against the cylinder head, when the pis. ton isv obstructed in its movement, and in sooperating under the 'reaction to disable themotor for actuating the press head 4, as willA be presently I described.

8 designates a heat insulated cabinet including the hood `9 on the upper side of the cabinet, this hood being openA at its lfront side overhang- -ingthe'table 3 and closed at its rear and lateral sides and top. I vI) designates a hood-shaped shield telescoping within the hood 9 and normally contained within the ho'od 9, when the press head 4 is openthis being open at its front and rear sides and closed at its lateral sides and top. The shield I0 encloses the head 4 and the arm of the operating lever 5, which carries the head 4. The shield I0 is here illustrated as pivoted at I I at its lower end to the side walls of the cabinet 8 near the axis 6 of the head carrying lever 5.

I2 'designates a burn guard or heat insulating curtain normally closing'the front side of the shield I Il and hence of the hood 9, this running over'suitable guide rollers I3 near the top arcuate wall of the shield III and being anchored at one end at I4 to the stationary hood 9 and connected at its other end to springs I5, which springs are anchored at I6 to the side walls of the hood 9 or the main part of the cabinet.8. The front portion of this guard or curtain I2 thus extends across the pressing face of the head 4, which is heated., and when the press is open, connes the heat Within the cabinet and prevents it from radiating into the face of the operator or into the room in which the machine is located. It also prevents -the operator from coming in contactvwith the press head when the press is open. During the operation of the machine, the actuating means for the shield I0 operates to move it from its position shown in Figure 1 to -that shown in dotted line (Figure 1) or full line (Figure 2). During this| movement, the curtain l gradually withdraws upwardly, so that the face o1Y the press head is exposed, as it nears the surface of the buck 2 orthe work thereon, and

' 4 toward closed position. The closing movement As here shown,l the cylinder is carried by 'one arm of the lever 2 I. pivoted at 22 between its ends t0 the frame I or any other xed part, and con-` nected at its other end to a spring 2 3 which normallyholds thel lever from movement underuthe l reaction of the air in the cylinder I9. The rod 24 of the piston is shown as pivoted at its upper end at v25 toa lever arm26 extendingradially from the pivot I I of the shield I0.

2'I 'designates the cylinder and 28 the piston in the'ylnder of the motor for actuating the head 4. This isan oscillatingfcylinder pivoted at 29 to the base of the frame. The rod 30 of the 4piston is here shown as connected at 3| to the joint offa toggle consisting of links 33, 34 pivoted attheir outer ends respectively at 35 to the frame and at `36 to the rearward arm of the head carry.

ing lever 5. AWhen the piston 28 is actuated, the Ltoggle 34 is straightened, thus actuating the head is against the action of returningspring 31. This form of actuating mechanism is merely illustrative and any suitable actuating or motion transmitting mechanism may be used.

38 designates a control valve operated by a manual, as a lever 39 located at the front of the machine or the table thereof. The valve-may be of any suitable form, size and construction, and it is here shown as self-locking. It includes a suitable casing normally arranged with its intake head 4I closed and its exhaust head 42 open, the valve member being held and returned to its normal position, as vby a spring 43. The valve member is actuated by the lever 39 here shown as pivoted at 44 and having an arm 45 which through another lever, for a purpose to be described, actu'- n ates the stem 41 of the valve member 40. The intake endof the valve 38 is connected to a main line 48 for a motive fluid as air. Upon operation f A of the manual lever 33 upwardly from the position shown in Figure 4, the arm 45 through the interposed end of the lever 46 actuates the movable member 40 of the valve 38 to close its exhaust valve head 42 and open its intake valve head 4I, permitting air to pass from the main line past the open head 4I through duct 49 in the valve casing to one side of a diaphragm 50 in a diaphragm chamber 5I, actuating the diaphragm 58 to shift a sliding stem 52 against the lever 46 and hold the lever 48 and hence the valve member 48 in its operated position, this happening upon momentary operation of the lever 33.

The air also passes from the valve casing 38 through

conduits

53, 54 to the lower intake end of the cylinder I9 to actuate the piston 28 on its up stroke and move the shield I8 out of the hood 9 toward the dotted line position (Figure 1) and f ull Aline position (Figure A2). At the same time, the air passes from conduit 53 to conduit 55 and a pressure reducing or throttle valve 56, conduits 58 and 68 'to the lower end of the cylinder 21 to actuate4 the piston 28 on its power stroke, the air pressure being reducedy below main line air pressure to such an extent that the actuation of the piston 28 isso slow as to actuate the head 4 slowly on its closing movement and to merely follow up the closing movement of the shield I8. The pressure reducing or throttle valve 56 may be of any well known construction.- As the shield I8 is-.movlngtoward closed position, the heat infrom zero to maximum. designates theexhaust valve of the timer. When the timer is used, the pressure builds up in the tank thereof from the pressure side of the diaphragm chamber sulating guard I8 is being withdrawn across the pressing face of the head 4 and clears the head when the shield I8 is a short distance over the work on the buck 2. When the shield I8 reaches its closed position, its arm 26 has moved to the dotted line position (Figure 4), where it comes in contact with a yieldingly pressed thimble 6I on the stem 62 of the movable member 63 of a combined intake and exhaust valve, here shown as of the same type as the valve 38. In so doing, it opens the intake valve head 65 and closes the exhaust valve head 66. The intake end of the casing of the valve 64 is connected by conf duits 61 and 68 directly into the main feed pipe 48. When the intake of the valve 64 is opened and the exhaust-66 closed, air passes through the valve 64 and conduit 68 to the conduit 68, and thence to the cylinder 21 to actuate the piston 28 with full air pressure and close the press into final closed position. A suitable check valve 69 is located in the conduit 68.

The press is opened by operating the manual 39 downwardly (Figure 4), thus operating an exhaust valve 18 by exhausting the air from the pressure side of the diaphragm chamber 5I through conduits 1I, 12 or by a timer 13, which may, for the present, be ignored, thus permitting the movable member 48 to be operated by the spring 43 to close its intake head 4I and open its exhaust 42, permitting air to exhaust back from the cylinder I9,

pipes

53, 54, casing of valve 38 out through the exhaust EX. As the piston 28 returns to its starting position, as will be presently described, the arm 26 moves out of contact with the head 6l on the valve member 63 of the valve 64 and permits the intake valve head 65 to close and the exhaust to` open, permitting the air to exhaust back from the main cylinder 21 through the pipes 68, 58 past the check valve 568 of the reducing valve 56, thence back through

pipes

55, 53 and casing of the valve 38 out through the exhaust passage EX thereof,'the spring 31 reacting to return the piston 28 to its starting position. In some instances, a timer 13 is employed to time the opening of the press. 13 designates such a timer, this being of the type known as the tank timer, that is, pressure builds up in a tank to a predetermined degree when it operates a diaphragm which opens an exhaust valve. The degree of pressure' required or the time required to build up the pressure may be adjusted by means of an adjusting screw or member 14 6I throu'gh the pipe 1 2, until it overcomes a diaphragm in a diaphragm chamber 16, which, through a lever 11, opens the exhaust valve 15 which discharges into the outer air directly, as indicated by the arrows 18. However, with the timer, the press may be opened at any time by operating the manual 38 downwardly to exhaust the pressure in the tank 13 through the pipe 1I, and hence from the diaphragm chamber 5I through the Apipe 12 by opening the valve head 13 of the exhaust valve 18 against its returning spring.

The cylinder and

piston motor

21, 28 is disabled by the shield I8 or the advance edge thereof coming in contact with an obstruction, as the hand of the operator. The stopping of shield I8 is illustrated by dot-dash lines (Figure 1). When the shield I8 comes in contact with such a'n obstruction, the shield I8 is momentarily stopped. This causes the reaction of the air on the piston 28 to move the-eylinder I8 bodily downward, thus moving the lever 2l on its pivot against the action of a spring 23. Such movement causes the lever to open the normally closed valve head 88 of an exhaust valve 8l against the action of its spring 82, this valve being connected to conduits 83, 84 to the conduit 58, so that the cylinder 21 is opened to the exhaust of air, and the piston 28 free to return to starting position under the influence of the spring 31. Thus the press head 4 opens, although the shield i8 does not return, and may, when the obstruction is removed, continue on to its fully closed position. However, if this occurs, the obstructing force being removed, the cylinder I9 returns upwardly to its normal position under the pull of the spring 23, so that the exhaust valve head 88 is again closed and the cylinder 21 open to the intake of air. Hence, the press will be then closed, although the shield I8 is and has been in closed position.

'I'he piston 28 is returned to starting position when the press opens by air pressure constantly applied to the upper side of the piston 28, through conduit 85 connected to the upper end of the cylinder I9 and to the conduit 68, which is connected in the main line. There is thus a differential pressure on opposite sides of the piston 28, but the pressure face on the lower side of the piston 28 is greater than that on the upper side, because the pressure area of the piston on the upper side is reduced an amount dependent upon the diameter of the piston rod 24. Hence, whenthe conduit 54 is opened to the main line of air pressure, as when the valve 38 is open, the pressure on the lower side of the piston 20 is greater than and overcomes the pressure on the upper face of the piston 28. When, however, the intake Valve head of the valve 38 is closed, and the exhaust valve head opened, the pressure on the upper 28 returns to its starting position under air pressure taken direct from the main line through the conduit 85.

The cabinet isprovided with a suitable exhausting fan 86, the outlet 81 of which may be connect.. ed to a chimney or other duct leading to the outside. 'I'his heat may be reclaimed or used for conditioning of garments.

Owing to this control and the shield, a press of this type may be safely operated with one hand and by a momentary operation, thus eliminating vthe time the operator heretofore been side of the cabine required to expend in waiting iorthe press head to -close.` Asshown in Figure 5, three presses A, B and C are operated by one operator. After placing garmenton press A. shel operates control `39 --and immediately leaves for press B and so on to press C, et al;Y On conventional presses, sheiS compelled to stand at machine until it closes and v then move to next press. By'this method, op- 1 erator's time issaved and complete safety is prolvided. Because of the cabinet I and lguard I2. the temperature of the room in which the machines are located may be air-'conditioned and the temperature and humidity kept constant, and furl lther no appreciable amount of heat radiates from 2,4oo,oso y I Y .I

which the movable element is normally located.

Y closure means and operate the upper pressing element being movable toward and from the lower,

the lower element being carried by the irameoutlanci means supported bythe the movable upper pressing including a hood portion in frame `for'carrying element, the cabinet the hood portion having an opening through which the upper pressing element is movable dur-` ing the opening and closing movement. animpen i'orate shield movable out of and into the hooded portion and movable out of the same in advance of the movable pressing element. the shield having imperiorate top and side walls telescopingin f the hood portion, the lower wall of the shield being open, a closure ior normally closing the opening o! the hood and the opening o1 the shield.'

and operating mechanism operable upon each ms.-`

chine operation to move the shield out of the hood into position to cover the other pressingelement and work thereon in advance of the closing movement of the movable pressing element, open the element into pressing coactionwith Athe lower pressing element, and to operate the movable pressing elementi shield and closure' means in the reverse order upon opening f the press, whereby there is a minimum of exchange of atmosphere between the interior and exterior oi' the cabinet during the press operation.

WALLACE F. GAYRING.