US1081479A - Leather-rolling machine. - Google Patents

Description

H. W. WINTER. LEATHER ROLLING MACHINE.

APPLICATION FILED APR. 8, 1910.

" Patented Dec. 16,1913.

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H. W. WINTER. LEATHER. ROLLING MACHINE. I APPLICATION FILED APJLB, 1910. 1,081,479.. Patented Dec. 16, 1913.

'4 SHEETS-SHEET 3.

H. W. WINTER.

LEATHER ROLLING MACHINE.

APPLICATION FILED APILB, 1910.

1 ,08 1 ,47 9 f Patented Dec. 16, 1913.

4 SHEETS-SHEET 4.

Methuen, in the county of Essex and State Ta ball whom it may concern: 1 s

UNITED STATES T OFFICE.

HENRY W. WINTER, 0F METHUEN, MASSAGHUSlElTTS, ASSIG NOR '10 UNITED SHOE MACHINERY COMPANY, OF PATERSON, NEW JERSEY, AGORPORATION OF NEW JERSEY.

.Beit known that I, HENRY W. Wirrrnn, a citizen of the United States, residing at of Massachusetts, have invented certain Improvements in Leather-Rolling Machines, of which the following description, in con -tion with the accompanying drawings, is

tau veral figures.

This invention relates to machines for rolling or pressing leather and similar stock, and more particularlyto certain improvements in machines offthe type disclosed in United States Letters Patent No. 638,862, dated December 12, 1899. For the purposes of illustration the invention is herein shown as embodied in such type of machine, but it is to be understood that the present improve ments are applicable to rolling machines in general and many of the benefits of the invention would be obtained if the several novel features forming the subject-matter of the claims were applied to other forms of rolling machine than that illustrated in said Letters Patent.

One objection to the machine shown in the prior patent referred to, and to other similar machines, follows from the fact that the workman is required to maintain his foot on a treadle'in order to hold the movable roll up to press the stock against the upper, and relatively stationary roll, as long as the machine is in operation. It has been found in practice that this is very tiresome and exhausting to the workman, and with a view to providing a means for overcoming such objection I have in a co-pending application, Ser. No. 551,822,filed March 28, 1910, shown and described certain improvements on said prior machine which include means for yieldingly pressing the lower roll up in engagement with the stock as it passes between the rolls, the pressure as thus applied being constantly effective, and acting ,automatically irrespective of the thickness of the stock. As disclosed in said application, such yielding pressure is applied by strong springs which are normally under a certain predetermined amount of compression and act upon toggles connected with the lower arms of the two-part bell crank levers, shown in said prior patent, and whose up- Specification of Iietters Patent.

' pecification, like reference characters on drawlngs indlcating like parts 1n the LEATHER-ROLLING MACHINE.

Patented Dec. 16,1913.

' Application filed April 8, 1910. Serial No. 554,131.

per arms serve to support the movable bearlngs of the lower roll. In order to relieve the pressure exerted by the strong springs and permit the lower roll to move away i from the upper roll, I have, in the machine of said co-pending application, shown and described a mzgiuallybperable device for effecting movement of the bell-crank levers and toggles in a reverse direction to that in which said parts are moved by the springs.

to cause pressure, on the stock. Such device,

in the preferred embodiment of the invention as therein illustrated, comprises a treadle whichis normally free from connection with the parts to beactuated thereby, but is arranged to be connected with said parts through suitable clutches when the treadle is depressed, and is thereafter actuated by a j plurality of strokes of the workmans foot to move the levers and toggles in opposition to the force exerted by the springs.

An important feature of' the present invention consists in the provision of poweractuated mechanism for relieving the stock from the pressure exerted by the springs which hold the movable roll in engagement with the stock. Under one embodiment of the invention such mechanism comprises suitable connecting devices between the main power shaft of the machine and the toggles, which are so constructed and arranged that upon actuation of a manually-operable member the power is applied from said shaft to move the toggles in opposition to the force normally exerted by the springs, which releases the pressure upon the stock. Prefer' ably, suitably geared segments are arranged to turn upon adjacent members of the toggles, and carry arms which are constructed to engage and break thetoggles when the segments are operated appropriately therefor, and one of the segments has an extension which carries a segmental worm gear meshing with a worm on a shaft driven from the main'power shaft of the machine, whereby to effect such operation. The shaft carrying the worm is arranged to be rotated in one direction, to break the toggles, or in the by a clutch, which may be moved to effect rotation of the shaft in the desired direction by a suitable treadle or other device under manual control. In

the preferred arrangement two treadles are used, one for shifting the clutch to connect the shaft with the pulley for causing its rotation in a direction to effect the release of the movable pressure roll, and the other to move the clutch oppositely for effecting a reverse rotation of the shaft to restore said roll to its normal position of pressure. In connection with this embodiment of the invention, also, means may be, and preferably is employed to automatically return the clutch to a neutral position in case the foot of the worlnnan should remain too long on either of the treadles, whereby excessive movement in either direction f the toggles when they are being moved b said poweractuated devices will be prevented.

Under another embodiment of the invention the power-actuated devices are arranged for causing movement of the toggles only in a direction to break them, and relieve the pressure of the rolls on the stock. Such form preferably includes a single powerdriven loose pulley on the shaft which carries the worm, a clutch, and a treadle and connections therefor to apply the power through appropriate gearing to the devices for breaking the toggles. The teeth on the worm and th worm gear, under this con struction, may be formed of such itch that when the workman steps off of tie treadle and the worm-carrying shaft is thus released from connection with the main powershaft the main springs will expand and straighten. the toggles, thereby automatically returning the several parts, including the geared segments and worm gear, to their normal positions.

Other features of the invention, including important structural details and combinations of parts, will be hereinafter more particularly described and claimed.

In the drawings: Figure 1 represents a right-hand side elevation of a machine embodying one form of the present invention; Fig. 2 represents a front elevation of the same machine; Fig. 3 represents a front elevation of a modified form; and Fig. 4 represents a vertical section on the line xm, Fig. 2, looking to the left.

Referring to Figs. 1, 2 and 1 of the drawings, the numerals 1, 1, indicate the end standards constituting the main frame for supporting the working parts of the machine,,, which carry bearings for the trunnions of the upper roll 3, and are also formed to provide guideways to receive suitable blocks 19, which serve as bearings for tne trunnions of the roll 5 and are vertically slidable in the guideways to permit the roll 5 to move relatively to the roll 3. A main driving shaft 7 is rotatably supported in bearings sustained by rigid extensions of the standards 1, 1, and carries a fly wheel 13, and a fast pulley 9 to which may be applied a belt for receiving power from a suitable source. The driving shaft 7 also has fast thereon a pinion, (not shown), which meshes with a gear 15 secured to an extension of one of the trunnions of the lower roll 5, and near its opposite end said shaft carries another pinion which meshes with an idler pinion whose teeth, in turn, engage with the teeth of a gear 17, fast on an extension of a trunnion of the upper roll 3. By this, or a similar arrangement of geared connections between the power shaft 7, and the rolls, when said shaft is rotated in a given direction the rolls will be caused to rotate in opposite directions. It will also be seen that as the shaft 7 and the inion carried thereby which meshes with t e gear 15 are in substantially the same horizontal plane as the axis of said gear, the latter may rise and fall with the lower roll for a limited distance without disturbing the operative connection between said roll and shaft.

The bearing blocks 19 are shown as being provided with recesses to receive the upper ends of plates 27 whose lower ends are supported upon the arms 25, which are fulcrumed upon pins 23, secured in brackets 24 carried by the end standards 1. The pins 23 are also shown as pivotally sustaining the arms 21, and said arms, together with the arms 25, constitute bell-crank levers. To the lower ends of the arms 21 are pivotally connected, by pins 64, the toggle. members which are respectively joined by the pivot pins 73 to the ends of the inner toggle members 67 whose opposite ends are pivoted to studs 69 and 70 which are rigidly supported from a frame brace member 116, secured to standards 1. A yoke 7 5 is connected with each of the pins 73 in a manner to permit pivotal movement thereon, and a rod 7 1 projects rigidly from each of these yokes and slides through a perforated sleeve on a bracket 79, which is carried by a plate 81 movable vertically in guideways on the frame brace member 116. Strong springs 85 surround the rods 74:, and are confined be tween the yokes 75 and the sleeves on the bracket 79, said springs being normally under compression which tends to straighten th toggles and move the bell-crank levers 21, 25, in directions to hold the lower roll against the stock as it passes between the rolls. The bracket 79 is provided with a bearing for a shaft 87 whose outer end carries a hand wheel 88, and a bevel gear is fast to the inner end of said shaft and meshes with a bevel gear carried at the upper end of a shaft 93 which is rotatable in a bearing carried by the plate 81, as shown by dotted lines in Fig. 1, and by full lines in Fig. 4. The lower portion of the shaft 93 is provided with an external thread which engages an internal thread formed on a part carried by the frame brace 116. By the construction described, it will be seen that when the hand wheel 88 is turned the described geared connections will impart rotation to the threaded shaft 93, which will cause the plate 81 to feed in a downward, or an upward direction in its guideways, according to the direction of rotation of the hand wheel, and thereby adjust the sleeves along the rods 74, to increase or diminish to the desired extent the amount of compression of the springs 85, and hence the degree of pressure exerted by the springs upon the stock.

The arms 21, near their upper ends, are

preferably threaded to receive, respectively, the right and left threaded adjusting screws 29, 30, whose outer ends bear against the inner surfaces of the arms 25, the adjustment of said screws serving to raise or lower the outer ends of the arms, and hence also the roll 5, in order to adjust the distance between the rolls in accordance with variations in the thickness of the stock. The screws 29, 30, are shown as being connected at their inner ends with the members 31 and 33 of an extensile shaft, the screw 29 being connected with the member 33 by a universal joint 35, and the screw 30 with the member 31 by a similar joint (not shown). For conveniently rotating the extensile shaft to cause simultaneous rotation of the adjusting screws, the member 31 is shown herein as having fast thereon a sprocket 37, over which passes a chain 38 which also passes over a sprocket 40, carried by a shaft 160, which has bearing in a sleeve carried by a plate 41, pivotally connected through a pin 43 with a bracket 45 projecting from one of the frame standards. The outer end of the shaft 160 is shown as carrying a sprocket 39, over which passes a chain 47, said chain also passing over a sprocket 49, carried by a shaft 53, which has bearing in the sleeve of a bracket 51, projecting from a part of one of the frame standards. The shaft 53 carries a hand-wheel 55 which is shown as, and preferably will be, located above the upper roll 3, so as to be in position for convenient operation by the workman as he stands in front of the machine where he can observe the thickness of the stock, and then readily adjust the distance between the rolls for variations as such stock passes from the work table 4 between the rolls.

A segmental gear 140 is provided with a bored hub which fits upon the stud 69 so as to turn thereon, and carries a rigid arm 141 having a projection 146 which normally occupies a position below and in contact with one of the inner toggle members 67, as

shown. A similar segmental gear 142, whose teeth mesh with the gear-140, is'provided with a bored hub to fit and turn upon the stud 70, said gear having also a rigid arm 143 provided with a projection 147 which normally occupies a position below and in contact with the other inner toggle member 67. The segmental gear 142 also has a downwardly extending arm which is formed or provided with a segmental worm gear 144, and said arm is provided, in addition, with two suitably spaced stop pins 148, 149. The

worm gear 144 meshes with a worm 111 which is fast on a shaft 110 having bearing in the frame standards 1, 1, and said shaft extends at one end beyondits carrying standard, and supports 011 its extended portion two loose pulleys 112, and 113, which are spaced apart a suitable distance on the shaft and may be formed with opposed beveled recesses to cooperate with the oppositely beveled hubs 120 and 121, of a cone-clutch member which is slidable on the shaft 110, but is constrained to rotate therewith through the instrumentality of a key or other appropriate form of connection. A bracket 136, carried rigidly by one of the standards 1, carries a pin to which are pivoted the spaced depending arms 134 for supporting the clutch member, and said arms carry pins 150 which project oppositely and enter an annular groove in the clutch memher, in a well-known manner. The arms 134 are connected pivotally with one end of a rod 132 whose opposite end is pivoted to a rigid crank arm 130 projecting from a horizontal shaft 124. The shaft 124 is supported for oscillation in bearings carried by a suitable base or support 122, and said shaft is shown as having the treadles 126 and 128, which are rigidly connected therewith and may conveniently extend upon opposite sides of the shaft, as shown in Fig. 2. Suitable springs 129, or other yielding devices, will preferably be arranged beneath the treadles to hold them raised, in which position the clutch member 120, 121, will be retained centrally between and out of operative connection with the respective clutch-engaging recesses in the faces of the pulleys 112 and 113. A link 138 is shown as being pivotally connected at one end to the stud 70, and at its opposite end to the crank arm 130, to which latter it may be conveniently joined by the same pin that connects the crank arm with the rod 132. The link 138 is arranged between the stop pins 148 and 149, as shown, and occupies a position to engage them as they move in opposite directions during the oscillations of the arm carrying said stops, for a purpose which will be explained hereinafter.

A pulleylOO, fast to the main shaft 7, carries a belt 102 which also passes over and is carried within the central belt groove of a three-groove pulley 107, which turns freely on a stub-shaft 101 projecting from a frame standard 1, and located above the extension of the shaft 110, the pulleys 112, 113, and the clutch member therebetween. A straight belt 114 is carried by the innermost groove of the pulley 107 and the pulley 112, and a crossed belt 118 is carried by the outermost groove of the pulley 107 and the pulley 113, from which arrangement it will be seen that the shaft 110 may be caused to rotate in either direction, and the direction of its rotation may be controlled by shifting the clutclrmember into clutching engagement with the appropriate one of the two pulleys 112, 113, through the treadles and their described connections with said clutch member.

The rebound of the bell-crank levers is cushioned by the levers 117, which are shown as being fulcrumed on pins 118 secured to the frame, and the springs 120, which are compressed between the rear ends of said. levers and a part of frame brace member 116 opposite said ends. The forward ends 124 of these levers are extended beneath and normally bear against the pivotally connected inner ends of the toggle members, as shown. Stop screws 122 are threaded into openings formed in the rear end portions of the levers 117, and serve, by contact with the frame brace member 116, to adjustably limit the extent of movement imparted to the toggles by their springs 85 in a direction tending to straighten said toggles. The springs 120 act in opposition to the springs 85, and when a piece of stock passes out from between the rolls and the compression of the springs 85 is released, the force due to their sudden expansion is checked, and the shock which would other wise be imposed upon the several connections between the springs and rolls, is absorbed.

In the normal position of the several parts described, and as shown in Fig. 2, the treadles 126, 128 will occupy elevated positions, and the movable clutch member will be located centrally between the adjacent faces of the loose pulleys. The springs 85 are then free to operate through the toggles and other connections upon the movable roll to hold it up yieldingly against the stock as soon as the stock is introduced between the rolls. The machine being then started in the usual manner, the rolls 3 and 5 will revolve in opposite directions and compress and roll out the stock, as the same is fed from the table 4 between the rolls by the workman. Then the workman desires to effect a separation of the rolls for any purpose, as for instance, if the stock should run crooked, or become doubled or bunched up between the rolls, he steps upon the treadle 126. This causes the crank arm 130, the rod 132, and the clutch member 120, 121, to move to the left as the machine is observed from Fig. 2, until the clutch connects the pulley 112 with the shaft 110. Rotation being then imparted to said shaft in a direction to cause a movement of the segmental worm gear 144 to the right, and, through the geared segments 140 and 142, to raise the arms 141 and 143 and break the toggles in opposition to the springs 85, the lower arms of the bell-crank levers are moved inwardly which permits the roll 5 to move away from the roll 3. The extent of downward movement of the roll 5 will be determined by the length of time that the treadle 126 remains depressed, and as soon as said treadle is released the spring 129 will act to restore the clutch to the position shown in Fig. 2. It will thus be seen that the workman has complete control of the mechanism for relieving the stock of the pressure of the rolls, and may, by the expenditure of sufficient energy only to move the clutch and its connections, effect a separation of the rolls to the desired degree. If, however, the workmans foot remains on the treadle until the stop 148 comes in contact with the link 138, the latter will be returned to its central position, and, through the agency of the rod 132 and arms 134, effect disengagement of the clutch member and arrest further movement of the toggles. lVhen it is desired to restore the rolls to their normal position of pressure the workman steps upon the treadle 128, thereby shifting the clutch member to the right and into engagement with the pulley 113. The shaft 110 is thus caused to impart rotation to the worm and to the geared segments in opposite directions to those described above, thereby permitting the toggles to straighten under the influence of the main pressure springs and to force the roll 5 up against the roll 3. Excessive movement of the said parts in this direction, also, will be prevented in case the workman fails to relieve the treadle from pressure at the proper time by the stop 149, which will engage the rod 138 and effect disengagement of the clutch member.

In Fig. 3 of the drawings a slightly m0di fied form of the machine shown in Fig. 2, is illustrated. Under this embodiment of the invention, the shaft 110 supports a single loose pulley, 216, which carries a straight belt 102, said belt also passing over a pulley 100 fast on the shaft 7. A bracket 136, secured to the adjacent frame standard 1, pivotally supports the arms 134, which carry pins 150 to fit an annular groove in a coneclutch member 120, which is connected with the shaft 110 by a spline, or similar connection, and slides on said shaft toward and from the pulley 116, which latter is formed with a cone-shaped recess to cooperate with said cone-clutch member. The shaft 110 has fast thereon the worm 111, which meshes with the segmental worm gear 144 carried by an arm projecting from the segmental gear 142, which is rotatively supported at the inner end of one of the toggle members 67 and has a rigid arm 143 which is provided with a projection to engage said member. A segmental gear 140 rotatively supported at the inner end of the adjacent toggle member 67 meshes with the gear 142, and an arm 141 is carried rigidly by the gear 140 and has a projection 146 to engage said toggle member. In order to relieve the pressure of the rolls upon the stock, the treadle 128 is depressed which shifts the movable clutch member 120 into engagement with the cone-shapedrecess in the pulley 116, to thereby eifect rotation of the shaft 110, and movement of the geared segments to break the toggle in the same manner as explained in connection with the preferred form. In the modification being described, however, the toggles are restored to normal position by the springs 85 instead of by power derived from the shaft 17 To this end, when the operator steps off of treadle 128, and, through the spring 129, and connections, the clutch member 120 is shifted to release the shaft 110 from the pulley 216, the springs 85 will expand and cause a reverse movement of the toggles, the lifting arms 141, 142, and the geared connections be-- tween said arms and the shaft. In order that this may be accomplished the teeth on the worm and worm gear have suflicient rinclination to permit the springs 85 to effect a slight reverse rotation of the shaft 110when the shaft is unclutched from the pulley 116.

Having described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a machine of the class described, the combination with pressure rolls, of means including a compression spring and a com pound lever for holding one of said rolls in a position of pressure, and a power-actuated shaft and connections between said shaft and spring arranged to apply power in opposition to the force of the spring for releasing said pressure.

2. In a machine of the class described, the combination with pressure rolls, of means including a compression spring and a compound lever for holding one of said rolls in a position of pressure, mechanism comprising a power-actuated shaft and connections between said shaft and spring arranged to apply power in opposition to the force of the spring for releasing said pressure, and manually operable means to control the application of said power at the will of the operator.

3. In a machine of the class described, the combination with pressure rolls, of means including a compression spring and a compound lever for holding one of said rolls in a position of pressure, and mechanism comprising a power-actuated shaft and connections between sald shaft and sprmg constructed and arranged to operate in opposition to the stress of said spring for releasing said pressure.

4;. In a machine of the class described, the combination with pressure rolls, of means including compression springs and compound levers upon which the compression springs act for holding one of said rolls in a position of pressure, mechanism comprising a power-actuated shaft and connections be tween said shaft and springs constructed and arranged to operate in opposition to the stress of said springs for moving said roll to release the pressure, and manual means to effect at will a reverse movement of said mechanism and permit the springs to restore said roll to a position of pressure.

5. In a machine of the class described, the combination with pressure rolls, of means including compression springs and compound levers upon which the compression springs act for holdingone of said rolls in a position of pressure, mechanism including a power-actuated shaft for rotating said rolls, M

and devices actuated by power derived from said shaft and operating in opposition to the stress of said springs for moving said roll to release the pressure.

6. In a machine of the class described, the combination with pressure rolls, of means including compression springs and compound levers upon which the compression springs act for holding one of said rolls in a position of pressure, mechanism including a power-actuated shaft for rotating said rolls, devices actuated by power derived from said shaft and operating in opposition to the stress of said springs for moving said roll to release the pressure, and manual means to effect a reverse movement of said mechanism and permit the springs to restore said roll to a. position of pressure.

7. In a machine ofthe class described, the combination with pressure rolls, of movable bearings for one of said rolls, a toggle having connection with said roll, a compression spring acting to extend the toggle and hold said roll in a position of pressure, and poweractuated mechanism arranged to act in opposition to said spring to break the toggle and release the pressure.

8. In a machine of the class described, the combination of pressure rolls, movable bearings for one of said rolls, levers for sup porting said bearings, toggles connected with said levers, yielding means acting to extend the toggles to hold said roll in a position of pressure, and power-actuated mechanism for moving said toggles in opposition to the force exerted by said yielding means.

9. In a machine of the class described, the combination of pressure rolls one of which is movable relatively to the other, toggles pivotally connected at one end with a fixed part of the frame and at the opposite end with the movable roll, springs acting to extend the toggles and hold said roll in a normal position of pressure, and power-actuated mechanism constructed and arranged to break the toggles in opposition to the force exerted by said springs and thereby release the pressure bet-ween the rolls.

10. In a machine of the class described, the combination of pressure rolls one of which is movable relatively to the other, toggles pivotally connected at one end with a fixed part of the frame and at the opposite end with the movable roll, springs acting to extend the toggles and hold said roll in a normal position of pressure, poweractuated mechanism constructed and arranged to break the toggles in opposition to the force exerted by said springs and release the pressure or to permit the springs to extend the toggles, and manually operable means for controlling said mechanism.

11. In a machine of the class described, the combination of pressure rolls, movable bearings for one of said rolls, levers fulcrumed to the frame of the machine and arranged to support said bearings, toggles connected with said levers, yielding means acting to extend said toggles to hold said roll in a position of pressure, a power-actuated shaft and connections to rotate the rolls, devices actuated by power derived from said shaft for releasing said pressure, and manually-operable means for controlling said devices.

12. In a machine of the class described, the combination of pressure rolls, movable bearings for one of said rolls, mechanism including toggles for supportihgsaid bearings, yielding means acting to extend said toggles and hold the movable roll in a po sition of pressure, pivotally-supported arms for acting on the toggles in opposition to said yielding means, connections between said arms, and power-actuated mechanism for operating said arms.

13. In a machine of the class described, the combination of pressure rolls, movable bearings for one of said rolls, mechanism including toggles for supporting said bearings, yielding means arranged to act on said toggles and hold the movable roll in a position of pressure, pivotally supported arms for acting on the toggles in opposition to said yielding means, geared connections between said arms, a power-actuated shaft having connection with one of said arms, and devices to effect rotation of said shaft in either direction.

14. In a machine of the class described, the combination of pressure rolls, movable bearings for one of said rolls, mechanism including toggles for supporting said bearings, yielding means arranged to act on said toggles and hold the movable roll in a position of pressure, pivotally supported arms for acting on the toggles in opposition to said yielding means, a. shaft having connection with said arms, means for rotating said shaft in opposite directions to effect a release of pressure on the stock, or to apply such pressure, and manually-operable devices for controlling said means.

15. In a machine of the class described, the combination of pressure rolls, movable bearings for one of said rolls, mechanism including toggles for supporting said bearings, yielding means arranged to act on said toggles and hold the movable roll in a position of pressure, pivotally supported arms for acting on the toggles in opposition to said yielding means, geared connections between said arms, a shaft having connection with one of said arms, oppositely-rotating loose pulleys carried by said shaft, and a manually-operable clutch member arranged to connect th shaft with either of said pulleys.

16. In a machine of the class described, the combination of pressure rolls, movable bearings for one of said rolls, mechanism including toggles for supporting said bearings, yielding means arranged to act on said toggles and hold the movable roll in a position of pressure, pivotally supported arms for acting on the toggles in opposition to said yielding means, geared connections between said arms, a shaft having connection with one of said arms, devices for effecting rotation of said shaft in opposite directions, a clutch to connect the shaft with either of said devices, treadles and connections for actuating said clutch, and means acting automatically to return the clutch to neutral position in case either of said treadles should remain depressed beyond a predetermined time.

17. In a machine of the class described, the combination of pressure rolls, movable bearings for one of said rolls, mechanism including toggles for supporting said bearings, yielding means arranged to act on said toggles and hold the movable roll in a position of pressure, pivotally supported arms for acting on the toggles in opposition to said yielding means, geared connections between said arms, a depending arm rigid with one of said connections and provided with a segmental worm gear, spaced stops carried by said arm, a shaft having a worm in mesh with said gear, oppositely rotating loose pulleys on said shaft, a clutch-member also on said shaft and arranged to connect either of said pulleys therewith, treadles having connection with said clutch-member, and a rod connected with said treadles and arranged between said stops, said parts being so arranged that if the operators foot remains on the treadle too long one of the stops will engage the rod and move the clutch member to neutral position.

or to permit the springs to extend the toggles and restore said the operator.

19. In a machine of the class described, the combination of pressure I'OllS, movable pressure, at the will of bearings for one of said rolls, mechanism including toggles for supporting said bearings, yielding means arranged to act on the toggles and hold the movable roll in a position of pressure, pivotally supported arms for acting on the toggles in opposition to said yielding means, connections between said arms, and means to effect movements of the arms to break the toggles and release the pressure between the rolls, or to permit the springs to extend the toggles and restore said pressure.

20. In a machine of the class described, the combination of pressure rolls, movable bearings for one of the rolls, toggles having connection with said roll, compression springs acting on one side of the toggles to maintain said roll in a normal position of pressure, arms engaging the opposite side of the toggles, and power-actuated means for causing said arms to break the toggles and release the pressure between the rolls, or to permit said springs to extend the toggles and restore said pressure.

21. In a machine of the class described, the combination of pressure rolls, movable bearings for one of the rolls, toggles having connection with said roll, compression springs acting on one side of the toggles to maintain said roll in a normal position of pressure, arms connected for simultaneous movements and engaging the opposite side of the toggles, and power-actuated means for causing said arms to break the toggles and release the pressure between the rolls or to permit said springs to extend the toggles and restore saidpressure.

22. In a machine of the class described, the combination of pressure rolls, movable bearings for one of said rolls, toggles having connection with said roll, compression springs acting on one side of the toggles to maintain said roll in a normal position of pressure, arms engaging the opposite side of the toggles, power-actuated means for said arms, and manually controllable devices arranged to cause said means to break the toggles and release said pressure, or to permit said springs to extend the toggles and restore said pressure.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

HENRY W. WVINTER.

Witnesses:

CHESTER E. Roenns, LAURA M. GOODRIDGE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

Correction in Letters Patent No. 1,00 ,1: :a[

It is hereby certified that in Letters Patent No. 1,081,479, granted December 16,

1913, upon the application of Henry W. Winter, of Methuen, Massachusetts, for an improvement in Le'atherltolling Machines, an error appears in the printed specification requiring correction as follows: Page 6, line 63, for the Words act on read extend; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Offioe.

Signed and sealed this 11th day of August, A. D., 1914:.

[SEAL] J. T. NEWTON,

' Acting Commissioner of Patents.

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