US1691677A - Mechanism for pressing machines having start and stop motors - Google Patents

Description

Nov. 13, 1928.

A. J. SOCIA ET AL MECHANISM FOR PRESSING MACHINES HAVING START AND STOP MOTORS 2 Sheets-Sheet 1 Filed Sept. 4, 1924 ATTORNEY.

I Nov. 13, 1928 A. J. SOCIA ET AL MECHANISM FOR PRESSING MACHINES HAVING START mm STOP MOTORS 2 Sheets-Sheet 2 Filed Sept. 4, 1924 INVENTOR, I

' ATTORNEY.

Patented Nov. 13, 1928.

UNITED STATES PAT ALEXANDER J. SOCIA AND JOSEPH P. DALY, OF SYRACUSE, NEW YORK, ASSIGNORS,

BY MESNE ASSIGNMENTS, TO THE PROSPERITY COMPANY, INC., A CORPORATION 01" NEW .YORK.

EECHANISM EOE ZPRESSING MACHINES HAVING START AND STOP MOTORS.

Application filed September 4, 1924. Serial No. 735,822.

This invention relates to pressing machines as garment and laundry pressing machines having an actuating mechanism including a start and stop motor and a toggle for trans- 5 mitting the movement of the motor to the movable element of the press and has for its object a particularly simple motion transmitting mechanism for actuating the toggle and particularly for starting the breaking of the toggle when the motor is starting. and effecting the final straightening of the toggle at the time the motor is about to stop, whereby a change or reduction in leverage ratio occurs so that the final heavy pressure is produced and also the initial opening of the press while under such heavy pressure, without overloading the motor or, in other Words, so that the load on the motor is substantially even throughout the intermittent operatlon of themotor. Y

, The invention consists in the novel features and in the combinations and constructions hereinafterset forth and claimed and described. r 2 In describing this invention, reference 1s had to the accompanying drawings in which like characters designate corresponding parts in all the views.

Figure 1 is a side elevation of one form of 3o pressing machine embodying our invention.

Figure 2 is a fragmentary elevation of the motion transmitting means between the cranks and the toggle, the toggle being shown in straightend or final pressure posltion.

Figure 3 is a view similar to Figure 2 showing the toggle in its foldedposition and the links in their position assumed when the toggle is folded.v

Figure 4 is a sectional view on line 4-4, 40 Figure 2. v

Figure .5 is a fragmentary detall view of the rear end of the link connected to the longer crank.

Figure 6 is a face view of the means for guiding the sections of the link connected to the shorter crank into operative position.

This pressing machine comprises generall cooperating pressing elements, one of whic is movable toward andfrom the'other, mechanism for actuating the movable element including an intermittently rotatable shaft, motion transmitting meansbetween the shaft and the movable element usually including a toggle, connections between the shaft and the toggle to move the toggle from folded 'to nearly straightened position and from nearlystraightened position to folded position and'additional connections for finally straightening the toggleand initially breaking the toggle and driving means for intermittently actuating the shaft.

The machine here illustrated is a conven- T-oFFicE.

tional type of pressing machine including a of a toggle, so that a half revolution in one V direction unfolds the toggle and a half revolution inthe other direction straightens the toggle and applies pressure to the head 2. The toggle links inthe machinesv heretofore used are substantially the same as that shown herein and includes links 8 and 9 pivoted together at 10, the link 8 being pivoted at 11 to the rear arm of the yoke 4 and the link 9 being pivoted to the frame 12. The link 8 includes a suitable com ression spring 13, but as the construction 0 the toggle in-itself forms no part of this invention, further description is thought to be unnecessary.

The shaft is actuated from an intermittently o erable electric motor '14,.-the armathrough suitable worm in the housing 17.

and including a part rotatable-with the shaft 1 7. Commercialforms of this automatic controller for tumbler switch as embodied in commercial pressing machines are shown in p the Andree Patent No. 1,379,601, May 24, 1921, and Benjamin and Carrol Patent No. 1,489,227, April 1, 1924.

The construction of the tumbler switch and;

controller and the operation of the machine by such tumbler switch and controller forms no part of our invention and as the same is shown in patent to Andree, No. 1,397,601, May 24, 1921,"further description is thought to be unnecessary.

Witha stop and start motor and crank, an excessive load is thrown on the motor during the starting and stopping to obtain and release the final heavy pressure, and the crank and the connecting rod must stop in a straight line. The moving of the crank and connecting rod into a straight or dead center line thrustsa sudden load on the motor and on account of this sudden load, the crank stops short of the dead center line and manual trip release means are resorted to to initially release the pressure on the toggle before the motor can be started to eifect the opening of the press.

This invention relates to connections between the shaft 7 and the toggle whereby the tog 1c is finally straightened and initially bro en by varying or reducing the leverage ratio between the motor and the press head. This reducing of the load on the motor and at the same time effecting the maximum pressure on the head 2 is effected by providing the shaft 7 with two cranks having different throws, the cranks being preferably arranged in the same radial line, a connecting rod or. link connecting the crank of longer'throw with the toggle by a lost motion connection and a link connecting the crank of shorter throw and the toggle 'and operating to take up the lost motion in the first mentioned connecting rod and straighten the toggle froma near straightened position effected by the first mentioned connecting rod and to take up the lost motion in the opposite direction to initially break the tog le. In other words, the cranks come in e ective action successively.

The term cranks is used merel for convenience and it will be understood that any form of rotary eccentric means may be used. Also it will be understood that the reduction in the leverage ratio broughtv about by two cranks may be used with motion transmitting means other than a toggle.

21 designates the shorter crank and 22 the longer crank, these havingcrank pins 23 and said pins, so that the entire structure 21, 22,

23, 24 and 24 is a unitary crank with two it crank pins of diflerent radii. 25 is a connecting rod or link between the longer crank 22 and the toggle, this rod 25 being mounted on the crank pin 24 at one end and connected to the jointlO of the toggle at its other end by a lost motion connection, the link 25 having a short lengthwise slot 26 at its rear end for receiving the pivot pin 10.

The link connecting the shorter crank 21 and the, toggle comprises sections out of operative relation to eachother when the tog le is folded as shown in Figure 3 and mova%le into abutting or thrusting relation with each other and with the toggle and into pulling relation tothe toggle when the toggle has been moved into a nearly straightened posiwhen the circuit is again closed through the motor 14 to open the press.

As here illustrated, the shorter crank 21 and the toggle comprises threesections 27, 28 and 29, the section 27 being mountedat one end on the crank pin 23 of the shorter crank 21 and extending rearwardly therefrom; and the section 28 being pivoted on the pivot pin 10 ofthe joint of the toggle and extending forwardly therefrom,

the sections 27 and 28 having respectively shoulders 30 and 31 arranged to be brought into abutting relation as shown in Figure 2 during'the closing of the press, so that as the link between the cranks approach the dead center line these shoulders come into abutting relation and the section 27 thrusting against the section 28 finally straightens the toggle and moves the joint 10 thereoffrom the front end of the slot 26 toward the rear end of the slot 26 of the link 25. u

The section 29 is pivoted at 32 to the section 27 and normally extends upwardly and rearwardly and. has a hook 33 at its rear end arranged to hook over the pivot 10 of the toggle when the toggle-is in its straightened position, so that when the motor is energized to open the press, the hook 33 pulling on the pivot pin 10 initially breaks the toggle, this eing permitted by the slot 26 in the lever 25. Thus the toggle is finally straightened and initially broken by the crank having a short lost motion connection and as here illustrated. it is formed with a slot 38 for receiving the pin 36. p

The sections 28 and 29 are connected together to move in synchronism by a suitable connection as a pin 39 on the section 28, which pin extends through a lengthwise slot in the section 29. Also the sections 27 and 28 are guided intoabutting relation and the section 27 held from undue displacement by a cam plate 41 suitably secured to the frame and having a cam slot 42 therein for receiving a follower on the section 27, this follower being usually at the end of the pivot pin 32. The section 27 is shown as bifurcate'd and also the section 28 is bifurcated, and the section 29 extends between the bi furcations of the sections 27 and 28. The slot 42 in the cam plate 41 is formed with a dip or deflected portion near one end as seen in Figure 6. This deflected portion causes the section 27 or the shoulder 30 thereof to dip or to hook under the shoulder 38 of the section 29, as these sections 27 and 28 are coming into a straight line. The shoulder 31 overhangs the dip portion of the slot 42 and causes the shoulder 30 to dip under or to clear the overhanging part of the shoulder 31 as the links or sections 27 and 29 come into abutting relation.

In operation, assuming that the press is open and the toggle in its position shown in Figure 3, the operator throws the tumbler switch 18 by a suitable handle so that the current passes through the motor 14 and the motor starts actuating the shaft .7

The motion is initially transmitted by the longer crank 22 through the link 25 to the toggle and moves the toggle nearly into the dead center line of the toggle. As the to gle approaches a straight line, the section'2 of the link connected to the shorter crank is brought into abutting relation with the section 28, so that a continued rotation'of the shaft 7 moves the cranks into their dead center line with the connecting rod links and moves the toggle links 8, 9 into their dead center line thus applying final or heavy pressure by motion transmitted through the shorter crank.

When the cranks complete the half revolution, the controller switch within thecasing 20 automatically breaks the circuit as in the Andree patent referredto.

Also as the link 28 comes into abutting relation with the link 27, thelink 29 having the hook 33, is brought into a pulling relation with the joint 10 of the toggle, so that whenthe circuit is again closed through the motor by actuating the tumbler switch 18, thesection 29 having the hook 33 is pulled fo rwar'dly by the short crank and initially breaks the toggle. After the toggle is broken,

the longer crank 22 through the connecting link 25 completes the opening operation.

What we claim is r 1. In a pressing machine, the combination of cooperating pressing elements, one of -which is movable toward and from the other,

and mechanism for actuating the movable element including an intermittently rotatable shaft, motion transmitting means between the shaft and the movable element includinga toggle connections between the shaft and the toggle for moving the toggle toward and from nearly straightened position, and additional connections between the shaft and the toggle for finally straightening the toggle and initially breaking the toggle.

2. In a pressing machine, the combination of cooperating pressing elements, one of which is movable toward and from the other,

and mechanism for actuating the movable element including an intermittently rotatable shaft and'motion transmitting means between the shaft and the movable element including a toggle and two sets of connections between the shaft and the toggle for straightening and unfolding the toggle, one set operating to initially break the toggle. I

3. In a pressing machine, the combination of cooperating pressing elements, one of which is movable toward and from the other, and mechanism for actuating the movable element including an intermittently rotatable shaft and motion transmitting means between the shaft 'and the movable element including a toggle and two sets'of connections between 1 the shaft and the toggle arranged to come successively into action, one set operating in advance of the second set to nearly straighten the toggle and the second set to finally straighten the toggle, and the second set being arranged to come into actionin advance of the first set to initially break the toggle.

4.111 a pressing machine, the combination of cooperating pressing elements, one of which ismovable toward and from the other, mechanism for actuating the movable element including an intermittently rotatable shaft havinga pair of cranks thereon, drivmg means to actuate the shaft one-half revolution during each intermittent operation, motion transmitting means between thecranks and the movableelement including a toggle and connections between the cranks and the toggle, one connection including "a link connecting one crank and the toggle by a lost motion connection and the-other con- A nection'comprising means. connected to the other crank and movable into connection with the toggle to take up the lost motion in one direction of said link and finally straighten tion during the openingmovement of the press.

'5. In a pressing machine, the combination of cooperating pressing elements, one of 5 which is movable toward and from the other,

mechanism for actuating the movable element including an intermittently rotatable shaft having a pair of cranks thereon, said cranks extending in the same radial line and one being shorter than the other, driving means to actuate the shaft one-half revolution during each intermittent-operation, motion transmitting means between the cranks and the movable element including a toggle '15 and connections between the cranks and the toggle, one connection including a link connecting the longer crank and the toggle by a I I lost motion connection and the other connection comprising link means connected to 2 the shortercrank and normally disconnected from the toggle and movable into efli'ective v connection with the toggle to take up the lost motion in one direction and finally straighten the toggle at the end of the closin movement v of the press and to initially brea the toggle and take up the lost motion in the other direction during the opening of the press,

6. In a pressing machine, the combination of cooperating pressing elements, one of I y which is movable toward and from the other,

mechanism for actuating the movable element including an intermittently rotatable shaft having a pair of cranks thereon, said cranks extending in the same radial line and one being shorter than the other, driving means to actuate the shaft one-half revolution during each intermittent operation, motion transmitting means between the shaft and the movable element including a'toggle 4c and connections between the cranks and the toggle, one connection including a link conmeeting the longer crank and the toggle by a lost motion connection and the other connection comprising linkage means connected to the shorter crank and movable into'connection with the toggle to finally straighten the toggle and take up the lost motion in one direction as the press closes and to initially break the toggle and take up the lost motion in the other direction during the initial part of the openin of the press, the cranks eing arranged to e brought into a straight line with the link and link means when the to gle is straight.

. In a pressing machine, the combination of cooperating pressing elements, one of which is movable toward and from the other, mechanism for actuating the movable element including an intermittently rotatable shaft having a pair of cranks arranged in the same radial line and the length of one being less than the other, driving means for actuating the shaft 3. half revolution during each intermittent operation, motion transmitting means between the shaft and the movable elemechanism for actuating the movable element, including an intermittently rotatable shaft, having a pair of cranks, one-crank having a different throw than the other, driving means'for actuating the shaft ahalf revolution during each intermittent operation, motion transmitting means between the crank and the movable element including a toggle, a link connecting the crank of longer throw and the toggle by a lost motion connection,

and means connecting thecrank of shorter throw and the toggle, said means includlng ment including a toggle, a link connecting folding sections connected respectively to the a toggle and the shorter crank to be moved thereby into and out of coacting relation. I

9. In a pressing machine, the combination of cooperating pressing elements, one of which is movable toward and from the other,

mechanism for actuating the movable element, including an intermittently rotatable shaft, having a pair of cranks, one crank L having a different throw than the other, driving means for actuating the shaft a half revov lution during each intermittent operation, motion transmitting means between the cranks and the movable element, including a toggle, a link connecting the crank of longer throw and the toggle by a lost motion connection, and means connecting the crank of shorter throw and the toggle, said means comprising folding sections, one being mounted on the shorter crank, a second section norm'ally out of abutting relation with the first I section, and movable into abutting relation with the first section to finally thrust the toggle into straightened position, and means for effecting the movement of the second section.

10. In a pressing machine, the combination of cooperating pressing elments, one of which is movable toward and from the other, mecha-" nism for actuating the movable element in cluding an intermittently rotatable shaft having a pair of cranks, one crank having a different t hrow than the other, driving means for actuating the shaft a half revolution during each intermittent operation, motion transmitting means between the cranks and the movable element including a toggle, a link connecting the crank-of longer throw and the toggle by a lost motion connection, and means connecting the crank of. shorter throw and the toggle, said means comprising folding eaner? sections, one being mounted on the shorter crank, a second section normally out of abutting relation with the first section, and movof the first and second sections.

11. In a pressing machine, the combination of cooperating pressing elements, one of which is movable toward and from the other, mechanism for actuating the movable element, including an intermittently rotatable shaft having a pair of cranks, one crank having a different throw than the other, driving means for actuating the shaft a half revolution during each intermittent operation, motion transmitting means between the shaft and the movable element including a toggle, a link connecting the crank of the longer throw and the toggle by a lost motion connection, and means connecting the crank of shorter throw and the toggle, said means inv eluding folding sections connected *respectively to the toggle and to the shorter crank and being normally out of effective motion transmitting relation and movable into effective motion transmitting relation with each other and with the toggle as the toggle is brought into nearly straightenedposition by the first link and the longer crank, and means for shifting the sections into and out of motion transmitting relation as the toggle straightens and after. the toggle is initially broken.

12. In a pressing machine, the combination of cooperating pressing elements, one of which is movable toward and from the other, mechanism for actuating the movable element, including an intermittently rotatable shaft having a pair of cranks, one crank having a longer throw than the other, driving means for actuating the shaft a half revolution during each intermittent operation, motion transmitting means between the cranks of the movable elementincluding a tog le, a

You'

link connecting the crank of the longer t row and the toggle by a lost motion connection, means connecting the shorter crank and the toggle including a push and pull section mounted on the shorter crank, a pull section pivoted to the first section and extendingupwardl and rearwardly when the toggle is folde a push section mountedon the joint of the toggle and normally extending upwardly and forwardly crosswise of the pull section, the push and the pull sections being in and slot connection, a link connecting t e push section and one of the links of the toggle, and means for guiding-the sections into coacting relation with each other and the toggle.

13. A pressing machinehaving a mechanism for actuating the movable pressing element including an intermittently rotatable shaft, driving means for the shaft including a start and stop motor and means including a manually operable part for controlling the starting of the motor and automatic means for controlling the stopping thereof; said intermittently rotatable shaft being provided with a pair of cranks having different throws, the cranks being arranged in the same radial line and one being longer than the other, inotion transmitting means between the cranks and the movable pressing element including a toggle, a link connecting the longer crank and the toggle by a lost motion connection and means connecting the shorter crank and the toggle and arranged to effect the final straighteningof the toggle and the initial opening ofthe toggle, the cranks being'movableinto a straight line with the-ylink and said means when the shaft is "at the end of each intermittent operation. i

14. In a pressing machine, the combination of cooperating pressing elements, one of" which is movable toward 'and from the other, and mechanism for actuating the movable element, including an intermittently rotatable shaft having a pair of cranks thereon,and motion transmitting means between the cranks and the movable element, movable into action successively, and driving means for actuating the shaft a onehalf revolution during each operation, the cranks movable in substantial- I ly the same radial line, and one being longer than the other, and aimovable part to which 'the motion of the cranks is transmitted, the motion transmitting means comprising a link mounted on one crank and connected to said part, a sectional link comprising a section mounted on the other crank and a-second section shiftable into and out of engagement with the first section and said part, and means operated by the first link and the part actuated thereby for moving the sections into and out of coacting position.

15. In a pressing machine, the combination of cooperating pressing elements, one of which is movable toward and from the other, and mechanism for actuating the movable element, including an intermittently rotatable shaft having a pair of cranksthereon,

and motion transmitting means between the cranks and the movable element, movable into action successively, and driving means for actuating the shaft a one-half revolution during each operation, the cranks being arranged in'substantially the same radial line, and one being longer than the other, a movable part to which the motion of the cranks is transmitted, the ,i'notion transmitting means comprising alink "mounted on one 7 crank and connected'to said part, a. sectional o link comprising a section mounted on the Q other crank and a second section shiftable into 51nd out of engagement with the first 5 section and said part, and means operated by the first link and said part for moving the sections'intoand out of coaoting position.

In testimony whereof, we have hereunto signed our names at Syracuse, in the county of Onondaga, and State of New.York, this 10 27th day of August, 1924, and at Syracuse, in

the county of Onondaga, and in the State of New York, this 27th day of August, 1924,

respectively.

ALEXANDER J. SOOIA. [L. s.] JOSEPH P. DALY; [It s]

Images