Патент USA US2122927код для вставки
July 5, 193s. S. BOOTH PRESSING'MACHINE Fi led Dec. 20. 1935 2,122,927 Patented July 5, 1938 2,122,927 UNEED .STATES ¿PATENT yOFFICE 2,122,922 _ ß PRESSING MACHINE » Stanley Booth, Leeds, England ` Application December Z0, 1935, `Serial-No. 55,485 In Great Britain April l.,VV 1935 4 Claims. This invention relates to pressing machines of the type including a pressing iron capable of be~ (C1. 744527) desirable to retain the iron or buck in a depressed position and for this purpose means have been descends and ñlls the space between the piston and the valve >I3 and thereby prevents any re turn of such piston owing to the return pressure of the liquid‘closing the valve. By this means the foot lever 5 is held in the position at which 5, the machine operator ceased to depress it and as this may take place at any point between the highest and lowest limits of the foot lever’s stroke, infinitely variable adjustment of the iron Ais af forded. This method of locking the iron allows 1u a light/or heavy vpressure to be applied to any thickness of materialjgarment or the like placed upon the buck Ill without being limited to given furnished capable of locking the operating means stages, ing passed over a so-called buck, or which in cludes an ‘upper and lower buck, and wherein the 5 iron or upper pressing buck is depressed and raised by means of a foot or other operating lever .or equivalent means. ` In the normal working of the above machine the iron or buck is freely depressed or raised by 10 manipulation of the operating lever. At certain periods during the operation of the machine it is 15 of the iron or buck. Previously known locking means have included To release the foot lever 5 the valve I 3 is opened 15 for the return flow of the liquid by any con mechanical devices incorporating ratchet mem bers which serve to hold the iron or buck but venient control means such as a foot or hand by way of example only: is in the form of a flange furnished with a ` Fig. 1 is a sectional side elevation of a pressing pendant ring I'I, and also with an upstanding sleeve 4I8 which is slidably mounted in, and pro jects lbeyond the top of the elongated boss I9 of lever connected to the `valve by mechanical or have only been capable of moving from one >tooth flexible operating means. If the valve is opened 20 to another of the ratchet whichA causes the lock by i-its control lever simultaneously lwith the de- 20 ing means to be limited to `predetermined stages. ` pression of the-machine foot lever 5 the latter AThe object of this invention is to provide simple will have unrestricted movement for raising and but eilicient locking means capable of obviating lowering the iron I. It will be appreciated by the above difficulty and of locking the iron or opening the valve I3 the piston II will simply 25 buck in a desired position within `the working re pump liquid into and out of the pump barrel I2. 25 quirements of the machine, whereby the adjust The pump element 8 shown in the drawing in ment of said iron orA buck with respect to the cludes the pump barrel I 2 furnished with a liquid y lower buck is adapted to( be inñnitely variable. reservoir I 5 at its upper e'nd having access to the Referring now to the accompanying> drawing in barrel only» through a valve member I6 provided 30 which an embodiment of this invention is shown with the'spring closed valve I3. The valve I3 30 machine showing the improved locking device; 35 Fig. 2 is a sectional plan on line A-A of Fig. l ; Fig. 3 is a sectional side elevation of the lock ing device; _ Fig. 4 is a sectional side elevation of the valve structure. > In the drawing the locking device is shown ap' 40 plied to a well known type of pressing machine including a pressing iron I adapted to be lowered to its work through connections 2, 3, and 4 by the depression of a pivoted foot lever 5 which auto matically rises under the influence of springs 6 45 (or balance weights) and thereby raises the iron . . To the machine frame 'I is pivotally anchored by means of the adjustable screws la, a pump element 8 having its piston rod 9 anchored to the '50 foot lever 5 in front of the lever pivot IIJ. As the foot lever is depressed the piston II is drawn downwardly in its barrel I2 by the piston rod 9 and the suction created‘above the piston opens, or retains open, a spring closed release valve I3. 55 Liquid flows into the barrel I2 as the piston II the valveßmember I6. The ring I'I is closed on its 35 underside >by a baffle piece 20 and liquid passes into or- from the ring through lateral openings 2I. Seated within the ring I‘I is an auxiliary valve 22 (provided with a stem 23) which nor mally closes the ports 24 opening into the hollow 40 valve member I6. Communication is made with the hollow valve member I6 from the reservoir I5 through the lateral ports 25 and when the valve stern` 23 is slightly depressed for opening the valve 22, liquid returning from the barrel I2 will be di- 45 rected by the baffle piece 20 to the lateral openings 2 I. This arrangement prevents any tendency to close the valve 22 as may be done by direct cen tral pressure Yon the valve. By opening the valve 22 the initial return pres- 50 sure of the‘liquid is released and flows through the ring-I1 and valve member IE into the reser voir I5. Continued pressure on the stem 23 causes the collar 26 >(pinned on the stem 23) to engage the sleeve I8 of the valve I3 and depress 554 2 "2,122,927 such valve for allowing the bulk of the liquid in return of the liquid by the spring 21 after pres What I claim ist l. In a pedal lock for a machine oi the type comprising a frame, a member supported for movement on said frame, and mechanism includ sure is` removed from the stem 23. ing an operating element such as a foot lever for To open the valves I3 and 22 the valve stem 23 passes up through the reservoir I5 and may pass through the cap 28 so as to be engaged by cap 28 so as to rest upon and operate the stem displacing the said member in relation to the frame; locking means for retaining the movable member in any desired displaced position, said locking means comprising a piston pump having its cylinder connected to the said frame and hav ing a downwardly extending piston rod connected to said operating element, a liquid reservoir, 23. The pivoted lever 30 is operated by the valve means comprising a main valve having a aforesaid control means which in the drawing comprises a front rod 32 anchored at its lower end to the foot lever 5 and a rear rod 33 anchored at its lower end to a bell crank lever 34. The ported sleeve-like part projecting into the pump cylinder, a seating within said sleeve-like part the barrel to flow back through the valve mem ber I6. The valves I3 and 22 are closed after the the adjustable screw 29 of a pivoted lever 30 car ried by the cap 28. Preferably a block 3| is slidably located in the boss (or gland) of the lever 34 is supported by a bracket 35 (ñxed to the machine frame 1) and connected by a rod 36 to the foot pedal 31 pivoted adjacent to the front end of the foot lever 5. The rod 32 operates the front end of the pivoted lever 30 through the medium of the spring 38 and the adjustable nuts 39. A space is left between the nuts and the spring to remove tension from the spring when the foot lever 5 is raised so that the valves I3 and 22 will remain open due to pressure exerted by screw 29. This also allows the foot lever 5 to be depressed for part of its stroke before the pivoted lever 30 is operated for releasing the valves I3 and 22 so that they may close immediately the pressure of the machine operator’s foot is removed from pedal 31 and foot lever 5. Such arrange ment is provided owing to it being unnecessary for general purposes for the iron I to be locked other than when within a comparatively short distance of the buck I4. Further, the position of the foot pedal 31 enables the machine opera tor to place a foot on both the pedal 31. and foot 40. lever 5 simultaneously for the normal working of the machine and such foot need only be drawn off the pedal 31 for locking the iron. Moreover the pedal may be quickly depressed for releasing the iron I. 45 In operation (for locking the iron) the foot lever 5 when depressed, lowers the piston II which, when the valves I3, Y22 are automatically released by screw 29, retains the main valve I3 open by suction for the down ilow of liquid which 50 locks the iron I by the liquid closing the valve I3 against its own return. During such downward movement the rod 32 operates the pivoted lever 30 which raises the screw 29 clear of the block 3I and pulls the rear rod 33 for raising the foot '_ pedal 31 through the bell crank lever 34 and rod 36. In this manner the foot pedal 31 is in a raised position when the iron I is locked so that the pedal simply requires to be depressed for releasing the iron I by operating the valves I3 60 and 22 through rods 33, 36 and levers 30, 34. To prevent leakage of the liquid down the piston rod 9 a packing gland 40 is placed at the bottom of the barrel I2. Furthermore, as liquid may creep past the piston Il, air may be ex 65 hausted from the barrel I2 below the piston Il through a by-pass 4I and adapted to carry any liquid in the lower part of the barrel with it to the liquid reservoir. To afford the easy addition of liquid to the reservoir I5, a pipe 42 with a funnel top 43’is attached tothe cap 28. The funnel top 43‘is located immediately below an opening (provided with a cover) in the machine top 44 which allows easy‘access for liquid re 15. plenishing purposes. » A and a baille member closing the open end of said sleeve-like part, and a pilot valve having its head disposed in the said sleeve-like part to co-operate with the said seating, said valve means being ar ranged to permit ilow of liquid from the reservoir . to the pump on movement of the said mechanism to displace the said member and to close auto matically upon cessation of such movement of the said mechanism, and control means for open ing the said valve means to permit> return flow of liquid from the said pump to the said reservoir. 2. In a pedal lock for a machine vof the type comprising a frame, a member supported for movement on said frame, and mechanism includ ing an operating element such as a foot lever for displacing the said member in relation to the frame; locking means for retaining the movable so, member in any desired displaced position, said locking means comprising a piston pump con nected between the said mechanism and the said frame, a liquid reservoir, valve means arranged to permit flow of liquid from the reservoir to the pump on movement of the said mechanism to displace the said member and to close auto matically upon cessation oi such movement of 40 the said mechanism, said valve means compris ing co-axial main and pilot valves, a sleeve con nected to the said main valve for effecting open ing movement thereof, a spindle connected to the said pilot valve and extending through and be yond the said sleeve for effecting opening move 45 ment of the pilot valve, a double-armed lever ar ranged to act on the said spindle, means coupled to the said operating element for exerting re silient pressure on the said lever to maintain the same normally in the inoperative position, a valve control element on the said operating element, linkage and lever mechanism connecting the said lever to the said control element, and a loose `slidably mounted element interposed between the said lever and the said spindle. 3. In a pedal lock for a machine of the type .comprising a frame, a member supported for movement on - said frame, and mechanism in cluding an operating element such as a foot lever for displacing the said pressing member in rela- `^ tion to the frame; locking means for retaining the movable member in any desired displaced position, said locking means comprising a piston pump connected between the said mechanism and the said frame, a liquid reservoir provided at the " top of the said cylinder, valve means arranged to permit flow of liquid from the reservoir to the pump on movement of the said mechanism to displace the said member and to close automati 79 cally upon cessation of such movement of the said mechanism, said valve means comprising co-axial main and pilot valves, a sleeve connected to the said main valve for effecting opening move ment thereof, a spindle connected to the said pilot 3 2,122,927 valve and extending through and beyond the said sleeve for effecting opening movement of the pilot valve, a cap closing the said reservoir, a double-armed lever mounted on the said cap and arranged to act on the said spindle, means coupled to the said operating element for exerting resilient pressure on the said lever to maintain the same normally in theinoperative position, a valve con trol element on the said operating element, link age and lever mechanism connecting the said lever to the said control element, and a loose element slidably mounted in a bore in the said cap and interposed between the said lever and the vsaid spindle. 4. In a pedal lock for a machine of the type comprising a frame, a member supported for movement on said frame, and mechanism includ ing an operating element such as a foot lever for displacing the said pressing member in relation 20 to the frame; locking means for retaining the movable member in any desired displaced posi tion, said locking means comprising a ‘piston pump having its cylinder connected to the said frame and having a downwardly extending piston rod connected to the said operating element, a liquid reservoir, valve means arranged to permit ñow of liquid from the reservoir to the pump on move ment of the said mechanism to displace the said member and to close automatically upon cessa tion of such movement of the said mechanism, a lever arranged to act on the said valve means, means coupled to the said operating element for 10 exerting resilient pressure on the said lever to hold same in the inoperative position when the said operating element is depressed, a valve con trol element on the said operating element, link age and lever mechanism connecting the said 15 lever to the said control element, a stuñing box at the lower end of `the said cylinder through which stuíiing box the piston rod passes, and a by-pass passage leading from the lower end of the said cylinder to the liquid reservoir. STANLEY BOOTH. 20 ` Patent No. 2,122,927. CERTIFICA'JJEl oF- CORRECTION.' , ' " July 5, _1958. Smm BOOTH. It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 2, >second. column, line 61, and page 5, first column, line `19, claims 5 and LL respec tively, strike out the word "pressing"; and that the said Letters Patent shouldberead with this correction therein that the same may conform to the record of the case -in the Patent Office. Signed and sealed'. this 9th clayV of August, A. D. 1958. Leslie (Seal) Frazer Acting Commissioner of Patente.