US1184555A - Stop-motion device. - Google Patents

Description

H. C. MILLER.

STOP MOTION DEVICE.

APPLICATION FILEUAUG. I7. 1911.

Patented May 23, 1916.

3 SHEETS-SHEET I- HI} v LIEU-M12 an ucuto-z H. C; MILLER.

' STOP MOTION DEVICE. APPLICATION FILED AUG. 17. 1911.

Patented May 23, 1916.

3 SHEETSSHEET 2.

Whine/500,0

H. C. MILLER.

STOP MOTION DEVICE.

APPLICATION FILED AUG. 17. 19H.

UNTTD ddTES PATENT @FFTGE HENRY C. MILLER, 01F WATERFORD, NEW YORK.

STOP-MOTIGN DEVICE.

Application filed August 17, 1911.

To all whom it may concern Be it known that l, HENRY C. MILLER, a citizen of the United States, residing at Waterford, in the county of Saratoga and State of New York, have invented certain new and useful Improvements in Stop-Motion Devices; and l do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

The invention relates to improvements in stop motion devices.

The improvement is designed primarily to be used in connection with sewing machines, but is not necessarily limited to this particular class of machinery.

The prime object of the invention is to provide mechanism which will edectively stop a machine at a predetermined point without jarring the parts irrespective of the speed, and to provide a construction which will be easy to start the mechanism to which the invention is applied.

Another object of the invention is to provide means in a stop motion device to pre vent the parts binding, in case the mechanism is set, and in case unusualpower should be relieved from the mechanism. Under these circumstances T provide means whereby a locking lug will be permitted to be forced over a cooperating cam and allow the mechanism to make another revolution thereby avoiding undue strain and possible breaking of the parts.

The invention also relates to the details of construction and arrangement of parts which H, of Fig. 1, looking in the direction of the arrows. Fig. 5 is e detail section, simi- Specification of Letters Patent.

Patented llllay 23, T9316.

Serial No. 644,691.

lar to Fig. 6, but showing the stopping lug 1n position against the cam to finally stop the mechanism. Fig. 6 is a similar view, but illustrating the locking lug as riding over the cam when strain is relieved from the power or undue speed occurs.

In the drawings, the numeral 1, represents a sewing machine of conventional type, including a loose pulley 2, fast pulley 3, and a trip 4, designed to automatically release the stop motion device at the end of a cycle of operation to stop the sewing mechanism.

Secured to the bed plate of the sewing machine 1, 1s a base 5, which forms a support for the stop motion device about to be described. Pivotally connected to the base 5, at 6, is an upwardly extending lever 7, provided with a rearwardly extended arm 8, formed with a perforation 9. @n the inner face of the lever 7, is a groove or seat 10, which receives an oscillating arm 1i, pivoted at 12, to said lever 7, and provided at its upper end with a projection 13. The oscillating arm is formed with a transverse guide slot 14 for a purpose to be described.

Pivotally mounted on the outer face of the lever 7, at 15, is an arm 16, provided at its upper end with a concave surface it, covered by a lining of leather, or like material 1.8, and designed to correspond to the contour of a hollow disk 23 secured on the shaft of the sewing the extension 8, and is provided at its outer end with a thumb nut 21, between which and the end of the arm 8, is coil spring 22.. This spring acts as a cushion when the stop motion is in operation, so that when the lining T8 of the brake is clam ed hard against the periphery oi? the disk 23, the lever it, may have a further slight continued movement.

A coil spring 25, is attached to the arm 16, and to a standard 26, projecting from the base 5. This spring serves to draw the lining 18, away from-the periphery of the disk 23, when the sewing machine is in operation, suficiently to obviate friction. The

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movement of the arm 16, under the influence of the spring 22, is limited by a stop pin 28, in'sald arm, the inner end of said stop gin abutting against'oneedge of the lever as clearly shown in Fig. 4.

Pivoted to the base 5, is a tilting frame 30, provided with anarm 31, to which is attached a chain or other operating connection, whereby to shift the belt from the loose to the fast pulley, as-will be described. Extending upwardly from the frame 30, are two arms 32, and 33, the latter being formed with a socket to receive a stem 34, of a" belt shifter 35. Connecting the two arms 32 and 33, is a guide bar 36, whichpasses through the slot 14, in the oscillating arm 11, whereby a guide is formed for said oscillating.

3.1111111 the movement of the parts.

In the hollow portion of the disk 23, and revolving with the latter is a cam 38, having a substantially concentric portion 39, and a substantially inclined portion 40, and

a short concentric portion 41, which merges into an inclined cam surface or abutment 42. The abutment is the element with which the projection 13, cooperates to bring the sewing machine mechanism to a final stop, and at a predetermined point at the proper time, but is so constructed that if the stop motion has not been properly ad justed, the projection may ride over the abutment to prevent the breaking and binding of the parts as indicated in Fig. 6.

llln operation, assume that the belt 45, is runningvon the loose pulley 2, and it be desired to operate the machine. The operator ulls the chain so as to tilt the frame 30, on its pivot, which movement also draws the belt shifter-35, laterally and with it the belt 45, from the loose pulley to the fast pulley 3, as shown in Fig. '1. When the frame'30. is tilted the guide bar 36, engaging the oscillating bar 11, rocks the latter on itspivot 12, and thereby removes the projection 13,,

from the path of movement of the cam 38.

When this occurs the brake 16, is drawn from the periphery of the disk 23 by the spring 25 and 1s held in this position by'the' stop pin-28. lt'may also be statedthat the oscillatin bar 11, is confined in the seat 10,

so that w on lever 7 is rocked it will also rockthe bar 11.- en the stop motion is thrown as described, the belt 45 engages the fastpulley and operates the sewing machine in the usual manner, and when the cycle of operation is complete the trip, 4, is automatically disengaged from the arm 31 and a spring 50, tilts the frame -30,"and the belt 45, is shifted again to the loose pulley. In this movement the oscillatingbar 11, is also returned to its normal position in the seat 10, and the projection 13, is brought into the path of movement ofthe operative surface of the cam 38. The projection does not contact with the surface 39, but upon reaching the inclined surface 40 the oscillating lever 11 is rocked, and as said lever fits snugly in the seat 10, it followsthat the lever 7, will also be rocked on its pivot'fi, against the tension of the spring 22, which exerts a pull on the arm 16, and applies the brake. By the time the projection 13 reaches the highest point of the inclined surface 40 of the cam 38, assuming the. spring 22, has been placed under proper tension, the speed of the'machine will, be substantially. under control, andv what may be termed a preliminary stopping, of the mechanism takes place. The substantially concentric portion 41, of the cam- 38, serves asa means to reduce the speed after the preliminary braking of the mechanism has occurred, through the action of the cam surface 40, and by the time the projection reaches the lug or abutment 42, the speed has been so reduced that little or no jar occurs and the mechanism is brought to an absolute stop and at a predetermmed point. When the arm 11, is rocked by the cam, the arm 8, is forced against the spring 22, and the latter against the nut 21. Hence the brake is drawn tight against the disk 23.

If, for'any reason the spring 22, has not been properly adjusted, so as to create frictionenough between the brake and the disk 23 to efiectually stop the sewing orother mechanism at the timefthe projection 13, encounters the abutment 42, the said projection will-ride over the abutment as shown in Fig. 6, and the fast pulley will make another revolution and the mechanism, will be stopped by the projection 13, again engaging the cam and contacting with the abutment42. Under these circumstances the operator must see to it that the thumb nut 21, is adjustedto place the spring 22, under proper tensionsoas to efiectually apply the brake on the disk 23, under the influence of the projection and cam, that the mechanism bestopped at the desired point. If the ten sion of the spring be too great, and the must be adjusted accordingly so that in every'insta'nce the projection must come into contact with the final abutment or braking surface to insure that the mechanism upon the completion of each cycle of movement stops at a predetermined point.

From the foregoing description, it will be seen .that by the arrangement ofthe parts described a positive'and efiective stop motion device is provided, and one which .by reason of ,the minute adjustment will, insure the stopping of the mechanism at any predetermined point and one which cannot jar and break the parts.

What I claim is: v

1. In a stop motion device, the combination of fast and loose pulleys, a til frame having a belt shifter, an arm pivoted to swing at right angles to the swinging frame andformed with .a seat, an element pivoted to thearm andmovable with the tilting frame, said element having a projection, a cam' revolving with the fast pulley and with which the projection engages, a brake arm coiiperating with the fast pulley, and a resilient connection between the brake arm and the pivoted arm.

2. In a Stop motion device the combination of fast and loose pulleys, a tilting frame having a. belt shifter, an arm pivoted to swing at right angles to the tilting frame, a brake cooperating with the fast pulley, a cam having a projection and revolving with the fast pulley, a resilient connection between the pivoted arm and the brake, and means pivoted to the pivoted arm and movable laterally with the tilting frameto cause the projection on the cam to apply the brake to the fast pulley.

3. In a stop motion device, the combination of fast and loose pulleys, a tilting frame, an arm pivoted to swing at right angles to the tilting frame,- an oscillating lever pivoted to the arm and movable with the latter and the tilting frame, a brake pivoted to the arm, a -resilient connection between the brake and the arm, a cam revolving with the fast pulley and cooperating with the oscillating lever to rock the pivoted arm and apply the brake when the swinging frame is moved toward-said fast pulley.

4. In a stop motion device, the combination of fast and loose pulleys, a swinging frame having a belt shifter, an arm pivoted to swing at right angles to the swinging. frame, said arm having a seat and a perforated. extension, an oscillating lever pivoted in the seat and provided with a guide to engage the swinging frame, a projection on the oscillating lever, a pivoted brake, a cam revolving with the fast pulley, a rod connected to the brake and extending through the perforation in the extension, a spring on the rod andbearing against the.- extension, whereby when the swinging frame is moved toward the loose pulley, the cam'will operate on the'projection and apply the brake to said pulley.

5. :In a stop' motion device, the combination of fast and loose pulleys, a cam revolving with-the fast pulley, said .cam having a projection, a pivoted arm, an oscillatinglever pivoted to the arm and having a projection which cotiperates with thecam, means for tilting the oscillating lever toward and from the cam, a brake cooperating with the fast pulley, a resilient connection between the brake-and the pivoted arm, means for holding the brake away from'the fast pulley when the former'is in normal position, the cam being arranged to pass the oscillating lever if the resilient connection is loose.

6. In a stop motion device, the combination of fast and loose pulleys, a cam revolving with the fast pulley, a brake coiiperating with the fast pulley, a pivoted arm formed with a seat and having an extension, a rod supported by the extension and pivotedte the brake, an adjusting nut on the rod, a spring between the adjusting-nut and the extension, an oscillating lever mounted in the seat and pivoted to the arm, said oscillating lever having a guide and a projection, the latter cotiperating with the cam, atilting frame having a guide bar with which the guide on the oscillating lever engages to cause the said lever to move with the tilting frame, a beltshifter supported by the tilting frame to shift a' belt from the fast to the loose pulley and vice versa.

7. In a stop motion device, the combination of fast and loose pulleys, a tilting frame, a belt shifter supported on the tilting frame, an arm pivoted to swing at right angles to the tilting frame, an oscillating lever pivoted to the pivoted arm and movable with the tilting frame, a brake pivoted to the pivotedarm, and a resilient connection between the brake and the pivoted arm, whereby-when the oscillating lever is rocked by the tilting frame into the path of the cam the brake will be applied to the fast pulley.

8. In a stop motion device, the combination of an element having a braking surface, a pivoted arm, a lever pivoted to the pivoted arm, a brake pivoted to the pivoted arm and cooperating with the braking surface, a resilient connection between the brake and the pivoted arm, and means for oscillating the lever to set same in braking position, and means coiiperating with the lever to rock the pivoted arm to operate the brake. I

9, In a "stop motion device, the combina tion of an element having a braking surface a cam provided with an inclined surface and a projection, an oscillating lever cooperating w-iththe cam, a pivoted arm to which the oscillating lever is pivoted, a brake pivoted to the pivoted arm, a connection including a spring, between the brake and the pivoted arm, and means for oscillating the oscillating lever toward the cam whereby the inclined surface thereof will gradually apply the brake on the braking surface and the projection will apply a final pressure of the brake on the braking surface to stop a machine at a predetermined point.

10. In a stop motion device, the combination of fastand loose pulleys, a'tilting frame having a guide bar, abelt shifter supported on the tilting frame, anarm pivoted at right lever having a guide to cooperate with the guidebar, a lug extending from the oscillating lever, a brake pivoted to the arm, a

rod, connected to the brake and supported by the arm, a spring "on said rod, means for adjusting the tension of the spring, an ad- .justable stop for limiting the movement of the brake, and a spring for holding the brake away from the fast pulley when the parts are in normal position.

11. In a stop motion device, the combination of a cam, a frame, tilting toward and from the cam, a pivoted arm, an oscillating lever pivoted in the arm to oscillate in the direction of the tilting frame, a lug on the oscillating lever to cooperate with the cam and a spring resisting the impact of the lug with the cam.

12. In a stop motion device, the combination of a movable frame, an arm pivoted to move at an angle to the movable frame, a movable lever mounted in the pivoted arm, a lug on the latter movable lever, a brake lever, movably mounted on the pivoted arm, a cushion, interposed between said brake lever and the pivoted arm, anda cam with which the lug cooperates, to operate the pivoted arm and apply the brake and lever.

18. In a stop motor device, the combination of a shaft, a cam on the shaft, said cam havinga lug, a pivoted lever, an oscillating lever pivoted to the pivoted lever to oscillate at right angles to the movement of said pivoted lever, a. projection on the oscillating lever to cooperate with the cam and lug thereon, a brake lever, a cushion between the brake lever and the pivoted lever, andmeans for moving the oscillating lever to bring the projection into the path of thecam, whereby said oscillating lever and said pivoted lever will be rocked and by means of the cushion, operate the brake lever.

14. .In a stop motion device, the combina-' tion of a disk, a cam, a brake lever cooperating with the disk, a tilting frame and means between the tilting frame and the brake lever for operating the latter, including two levers, pivoted at right angles to each other and a cushion between said pivoted levers and the brake'lever, one of said pivoted levers being operated by the cam to operate the brake lever on the disk.

15. In a stop motion device, the combination of a disk, fast and loose pulleys, a cam, a tilting frame, a belt shifter carrier by the tilting frame, a pivoted lever,-provided with a member having a projection to cooperate with the cam, a pivoted brake lever, a yield ing connection between the pivoted brake lever and the pivoted lever, whereby when the tilted frame "is operated the projection will be brought into t e path of the cam and a belt will be shifted and the brake lever will be applied to the disk.

.16. In a stop motion device, the combina-, tion of an element having a braking surface, a brake cooperating with the braking surface, means including a pivoted setting lever to move the brake into contact with the braking surface, a cushion spring connected with the brake and with which the brake operating means cooperate when applying the brake, a cam for operating on the setting lever, and means for positioning the setting lever'inthe path of movementof the cam.

17. In a stop motion device, the combination of an element having a braking surface, a brake cooperating with the braking surface, means including a setting lever pivoted to swing at right angles to the movement of the brake to move said brake into contactwith the braking surface, a spring connected with-the brake and with which the brake operating means cooperate when applying the brake, a cam for operating on the setting lever, and means for rocking the setting lever at right angles to the movement of the brake to position said lever in the path ofmovement of the cam.

18. In a stop motion device, the combination of-an element having. a braking sur: face, a brake cooperating with the braking surface, a pivoted supporting arm to which the bIBLkO'lS pivoted, a resilient connection between the brake andthe supporting arm,

the cam to apply the brake to the braking surface. H

19. In a stop motion device, the combination of an element having a braking surface,

a brake cooperating therewith, a setting lever, a" 'ivoted arm, said-arm forming a support for the brake and the setting lever, a spring interposed between the pivoted arm and the brake, a device for operating on the. setting arm at predetermined times, and means for positioning the "setting lever in the path of the said operating device whereby the latter may cause thebrake to engage the brakingflsurface.

20. Ina stop motion device, the combination of an element having a braking surface, a brake, a supporting arm, a setting-lever, a yielding connection between the brake and the setting lever, said ar'm, setting lever and brake moving together when the brake is in operation, and means for acting on the setting lever to apply the brake "on the brakingsurface at predetermined times;

21. Ina stop motion deviceythe combina" tion of an element having a braking surface,

a brake, apivoted supporting arm, acon arm abuts and whieh is'placed under ten- In testimony whereof I have signed my sion when applyin the brake to the brakname to this specification in the presence ingsurface, a settlnglever carried by the of two subscribing witnesses.

arm and movable toward and away from HENRY G. MILLER. the same, a cam, and rneans for moving the Witnesses:

setting lever in position to be engaged by H. R. VAN KLEEGK,

the cam to operate the brake. CHARLES WINNIE.

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