US728269A

US728269A - Stop mechanism for sewing-machines.

Info

Publication number: US728269A
Application number: US68002698A
Authority: US
Inventors: Daniel Mills
Original assignee: STANDARD SEWING MACHINE CO
Current assignee: STANDARD SEWING MACHINE CO
Priority date: 1898-05-07
Filing date: 1898-05-07
Publication date: 1903-05-19
Anticipated expiration: 1920-05-19

Description

PATENTED MAY 19, 1903.

D. MILLS. STOP MEGHANISMPO-R' SEWING MACHINES.

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L E D 0 M 0 \N WITNESSES THE ucwms PEYEHS co, Pnomumo WASHINGTON, u. c.

'No. 728L269.

' PATENT-ED MAY 19, 1903.

D... MILLS. v STOP MECHANISM FOR SEWING MACHINES.

APPLICATION FILED MAY 7; 1898- NO MODEL.

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INVENTOR WITNESSES m ATTORNEY Ya: mum vzrzns cov PnoTm mm. msumcmm n. c.

- No. 728,269. PATENTED MAY 19,1903.

, 1). MILLS. $101 MECHANISM FOR SEWING MACHINES. APPLICATION FILED MAY 7, 1898. I H0 MODEL. 3 SHEETS-SHEET 3.

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ms PEYER5 co PHOTOLITHQ. WASHINGYON n c UNITED STATES PATENT OFFICE.

DANIEL MILLS, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE STANDARD SEWING MACHINE COMPANY, .OLEV-ELAND, OHIO, A

CORPORATION OF OHIO.

SPECIFICATION forming-"part of Letters Patent No. 728,269, dated May 19, 1903.

' Application filed May 7,1898. .S;erial No. 680,026. on model.) i

To a whom it may concern:

Be it known that I, DANIEL MILLS, 'a citizen of the United States, and'a resident of' Philadelphia, State of Pennsylvania, have invented certain new and useful Improve-- ments in Stop Mechanism for SeWing-Machines, of which the following description,"

taken in connection with the drawings herewith accompanying, is a specification.

In certain classes of sewingmachines such as buttonhole-stitching and button-sewingmachinesitisdesirablethatthemachines shall be automatically stopped after a certain predetermined number of stitches have been taken, and it is also desirable that the machines should bethus stopped with the needle abov'e'ithe workand the take-up in a position at or adjacent to its upward limit of:

movement; and myipr'esent invention "has for its principal object 'to-provide-a'stopping mechanism which will operate to automatic ally stop a machine at the time and in the position referred towithout undueijarfor;

shock to the same. This object I secure by means of the construction andf'arrangement; of parts,as hereinafter setforth in detail,- and pointed out inthe claims.

Referring to the accompanying drawings, Figure 1 is a side view ofaseWing-machine Fig. 2'is a plan embodying my invention. 7 view of the sewing-machine bed-plate-with the arm in section through line 2 2 of Fig. 1, showing part of a buttonhole-stitching mechanism'andtheconnection between the same and the stoppingfmechani sm. rear end view of the machine with the'loose driving-pulley removed and its engaging lever and lever-supporting bracket in section through line 3 3 of Fig. tisayertical section of the machine throi'ighdine 4 4! driving-shaft a of the machine in the usual manner.

Fig. 3 is a This, pulley b is provided withla fnub b, upon which is loosely mounted a driving-pulley b which latter is. supported to have a-longitudinal movement upon the hub 5', whereby it may be moved at the will lot the operator by means as Willhereinafter "be described to and from a position to clutch with the pulley and communicate motion to the machine. Any suitable form of clutch connection may be had between said pulleys, the connection,as herein shown,being secured by means of a cone-faced hub 19 on the driving-pulley, which is adapted to enter an interiorly-cone-faced hub-sleeve b on the pulley b and when forced therein frictionally hold the pulleys together.

As a means for moving or forcing the driv- -,in*g-pulley into engagement with the driven jpulley b I have provided an elbow-lever c, ;which is pivotally supported at 0' upon a ;bracket a secured upon the frame or arm of the machine-and forming a part thereof. The lever c is arranged with one arm c extending into a position to engagewith the hub b 'of ithe driving-pulley andwith its other armc lextendin'g beneath the pulley b and provided I with a friction-brake d thereon for engaging with the latter. :formed with an angle, so that apartthereof, as 0 ,=upon.which the brake is secured, will The armc ofthe lever c is extend parallel with the pulley b, as shown in Figs. 3 and 4:.

The lever o'connectswit'h a slide-plate e, so as to be movable therewith by having a pin .orproje'ction c thereon extend into an open- ;ii'ng e"in said plate. ,ported-ina vertically-movable position upon the bracket n? by means of an embracing i guide-plate 8 securedto said bracket and is provided with a notch in one side thereof adjacent to its lower end intowhich one edge e 1 Offl. horizontally-movable slide plate or latch e {i's adapted to extend when the machine is This slide-plate e is supinoperation, so as to hold'the said vertical slide-plate e in a lowered position, with the lever 0 forcing the driving-pulley into operative engagement with the driven pulley and with the brake away from contact with the latter.

The plate or latch e, which is supported on Patented May 19,1903.

the bed-plate of the machine, is provided with a cut-away portion 6 in one edge thereof, so that after it has been moved horizontally a certain predetermined distance by suitable automatic mechanism, as will hereinafter be referred to, such cut-away portion will be brought opposite the notch in the slide-plate, so as to release the latter, and thereby allow the lever c to be moved to a position with one arm releasing the driving-pulley from contact with the pulley b and the brake d on its other arm in engagement with the latter pulley, as shown by dotted linesin Fig. 1. Such movement of the lever c to stop the machine is secured by means of a spring f, which is secured upon the bracket a with one end exerting a normal upward pressure against the underside of the lower arm of the lever c, as shown.

Although the machine will he brought to a stop when the driving-pulley is thus released from engagement with the fast or driven pulley and the brake applied to the latter, it will not be stopped with the parts in any definite orpredetermined position,as is desirable, and in order to accomplish this I have provided a means as follows: A collar or ringh is loosely supported upon the hub of the pulley l) and is provided with a fixed pin 71, thereon, which projects through an elongated slot [L2 in said pulley. On that side of the pulley opposite the ring it a coiled spring i is supported, with one end acting against a fixed pin it on the pulley b and its opposite end acting against the said pin hof the ring h, so as to movably hold the said ring and pulley in a normal stationaryposition relative to each other,with the pin h of the ring at one end of the slot 71 in the pulley, as shown in Fig. 3.

A fixed arm 7:; of the lever 0 extends into a position opposite one side of the ring h and is provided with a bent end, as at forming a catch which is adapted to be automatically moved into a position to engage with a projection h on the said ring h, as shown by dotted lines in Fig. 1, when the lever c is operated to release the driving-pulley from the pulley b and move the brake d into engagement with the latter, as hereinbefore described. When the arm 70 thus engages with the projection on the ring h, the latter is brought to a positive stop, while the pulley I) under the momentum of the machine may continue its rotation, as shown by dotted lines in Fig. 3. Such further rotation of the pulley, however, is against the pressure of the spring,whose opposite end has been made stationary with the ring 71., and after its momentum has been overcome the reaction of the spring is suflicient to return the pulley to a position with the end wall of its slot h against the now-stationary pin of the ring h, in which position of the pulley the machine is in a definite desired position, with the needle above the work and the take-up at or adjacent to its upward limit of movement, as shown in Fig. 1. In this manner the machine as the stopping mechanism is complete without the same.

When the lever c is moved to force the pulley 5 into engagement with the pulley b for the purpose of again starting the machine,

'such movement throws the catch end of the arm 70 out of engagement with the projection on the ring h and in a position at one side the path of movement of the same, as shown in Fig. 1, so as to release said ring and allow it to rotate with the pulley b.

The horizontally-acting slide-latch e, which is operated to release the slide (1 at a certain predetermined time for the purpose of cansing the machine to be stopped, may be operated by any suitable automatic mechanism, the same as herein shown being the buttonhole-stitching mechanism illustrated and described in another application of mine now pending, filed November 9, 1896, and bearing Serial No. Gl1,486,which in part is as follows: A slide-plate m,which connects with the workclamp in my said buttonhole-stitching machine to give the same its longitudinal movement, is supported on the bed-plate of the machine and provided with two pins m m, between which a rotatingheart-cam m operates to communicate a longitudinal forward and backward movement thereto. A lever'n, centrally pivoted on the bed plate of the machine, is connected at one end with the plate m to be moved thereby and at its opposite end is provided with an adjusting-screw n, which bears against one end of the slide-latch e. By this means as the plate m is moved forward during the stitching of one side of a buttonhole the lever is moved thereby in a direction away from engagement with the slide 6 and as said plate m is moved backward or in the opposite direction during the stitching of the other side of the buttonhole the lever 92 is moved into engagement with the said plate e and moves the latter longitudinally, so that when the plate m has been moved the proper distance to complete the buttonhole the latch 6 will also have been moved the necessary distance to bring the notch or cut-away portion c therein opposite the vertical slide 6 to release the latter, and thereby allow the stopping mechanism to operate to stop the machine in the manner as described. By turning the adjusting-screw n in the proper direction, so that its end will project more or less beyond the lever 92, the timing of the movement of the slide 6 may be regulated to release the slide cl sooner or later, according to the number of stitches it may be desired to have the machine make before being stopped. The machine may also be stopped at any time independent of the automatic mechanism by operating the latch c by hand, the forward end of which is turned up to enable the same to be grasped by the operator for such purpose.

A chain or other suitable connection extending beneath the machine may be attachedto the slide 6 as a means for loweringthe same a when it is desired to start the machine, and a p, which is pivotally supported upon the bracket o into engagement with a pin p on the lever 0, so as to hold the latter in its position, with the pulley b in contact with the pulley b and the braking mechanism in inoperative position. When the lever c is thus held, there is no movement of the same when the latch c is moved into position to release the slide 6.

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

1. In a sewing-machine, the combination, with the main shaft, of'a pulley made fast on said shaft and provided with an elongated slot therein, a ring loosely supported on said shaft and provided with a pin extending throughthe said slot in the pulley, a spring yieldingly holding said ring with its pin in a normal position against an end wall of said slot, a pivoted rocking lever having means for engaging with said ring to stop rotation of the same and the connected pulley, and means, embodying a vertical slide and a horizontally-acting latch, for automatically controlling the action of saidlever, for the purpose set forth.

2. In a sewing-machine, thecombination, with the main shaft having fast and loose pulleys, the former having a yieldingly-connected stop projection-at one side thereof, of a pivoted rocking lever having one arm for engaging with the loose pulley to force the same into contact with the fast pulley, and a second arm for engaging with the stop projection of the fast pulley, the said arms be ing so arranged that when the. lever is operated to place one arm into operative position, the other arm is thereby moved or placed in an inoperative position, and means, embodying a slide, for automatically controlling the action of said lever, for the purpose set forth.

3. In a sewing-machine, the combination with the main shaft having fast and loose pulleys, the former having a connected stop projection at one side thereof, of a pivoted lever having one arm for engaging with the loose pulley to force the same into contact with the fast pulley, and a second arm for engaging with the stop projection of the fast pulley, a spring for movably holding said lever in a normal position with one arm releasing the loose pulley and its other arm in engagement with the stop projection of the fast pulley, and a catch device forholding the lever in a position against the pressure of the spring with one arm holding the loose pulley in operative contact with the fast pulley and its other arm releasing the connected stop projection of the latter, for the purpose set forth.

4. In a sewing-machine, the combination, with the main shaft having fast and loose pulleys, the former being provided with a stop projection, of a lever having one arm for engaging with the loose pulley to force the same into operative engagement with the fast pul-' ley, a second arm for engaging with the stopprojection of the fast pulley, and a third arm carrying a brake for engaging with the latter,

and means for controlling the action of said lever, for the purpose set forth.

DANL, MILLS.

Witnesses:

CHAS. O. EMMONS, Gno. P. SMITH.