US888957A - Stopping-gear for sewing-machines. - Google Patents

Description

PATENTED MAY- 26, 1908.

J. BEATTIB. STOPPING GEAR FOR SEWING MACHINES.

APPLICATION FILED JULY 10, 1905.

3 SHEETSSHEET 1.

N VE N TOR J'i/VIESBEATT/ ATTORNEYS PATENTBD MAY 26, 1908.

J. BEATTIE.

STOPPING GEAR FOR SEWING MACHINES.

APPLICATION FILED JULY 10, 1906.

3 SHEETS-SHEET 2.

F l C 10 iailllim INVENTOR w ITNESSES a. 98 8 m @886 PATENTED MAY 26, 1908.

J. BEATTIE.

STOPPING, GEAR FOR SEWING MACHINES.

APPLICATION FILED JULY 10, 1905.

3 SHEETS-SHEET 3.

- IVNVENTOR UNITED STATES PATENT oFFIoE.

JAMES BEATTIE, OF PENDLETON, NEAR MANCHESTER, ENGLAND.

' Specification of LettersjPatent.

STOPPING-GEAR FOR SEWING-MACHINES.

Patented May 26, 1908.

Application filed. July 10, 1905. Serial No; 269,069.

To, all whom it may concern:

- Bedt known that I, JAMEs BEATTI E, a sub- 7 ject of the King of Great Britain and Ireland,

- material sewn.

and residing at Swan street, Pendleton, near Manchester, in the countyof Lancaster, England, have invented new anduseful Improvements in Stopping-Gear for Sewing-Machines,

In the accompanying drawings, Figure 1 is 7 a front elevation showing the bobbin or a spool with a spring lever device, for making an electric contact on a sewing machine, also thread guides, and feed mechanism for the bobbin; Fig. 2 is an end elevation of the small spring lever shown in Fig. 1 for making theelectric contact; Fig. 3 is aside view, and Fig. 4 an end view of small electric motor with cam attachment and falling lever; Fig. 5 is a front view, Fig. 6 a side view, and 'Fi 7 a plan view of the bracket carrying the e co.- tric motor and strap fork displacing gear; Fig. 8 is a front view, Fig. 9 an end view, and Fig. 10 an opposite end view of a sewing machine with the parts hereinbefore mentioned applied thereto.

Referring to Figs. 1 and 2, a bracket 9 is provided to carry the thread rides f and springlever d of resilient material, also bobbin disk and pulley a, and contact rod e. One end of the rod e is connected to an electric wire at the point e, the other end of the wire being connected to a small electric motor as'i, Figs. 3 and 8. The bracket 9 may be secured to the overhanging arm of the sewing machine or on the machine table, as

desired.

The operation is as follows :The machine is threaded up by fixing the top bobbin a onthe other end 0 the wire is connected 'to a battery B, Fig.' 8, or other source of electric current; the thread is then carried to the tension and thence to the take up lever and needle of the sewing machine. The top thread is made to feed up to the material being sewn, independent of the action of the ordinary'feed, but at a slower. rate of speed,

or substantially equal thereto'by the I'OtBr' tion of the bobbin disk and pulley a;

What is termed the ordinary feed is the manner in which the thread is pulled from the bobbin as the machine is sewing. The function of the extra independentfeed is to cause the contact member to make thecon tact when the top thread breaks or is cut by the knife in the presser foot. The top thread v always breaks at some point between the needle and tension 9, so that ordinarily the thread would not slacken between the tension and the bobbin, thereby permitting a contact to be made between the rod 6 and .lever d. This difficulty is avoided by' putting the extra or independent feed upon the top thread, in the mannerdescribed, thereby causing the thread to slacken an'dthe spring member (1 to contact with the rod 6 when the top thread breaks. This'independent feed is arranged so as never to overtake the ordinary feed of the sewing machine, but to be substantially e ual thereto. The top bobbin may be driven" y a friction driven cord; or

any suitable feed gear,'as desired, for instance, such-as shown, which I will 'now describe. The bobbin a is driven by a worm g and-wheel'g, Fig. 9. The worm is preferably located at the end of the inain sewing machine shaft- The worm wheel 9 is mounted upon a vertical spindle, which carries three or more small ra'duated grooved pulleys 9 one of which is geared with the obbin pulley-g Fig. 8, by means of an end less cord. I do not wish to confine myself i to 'usin this articular form of gearing to effect t e feed of'the-top thread, for obviously any suitable form may be used so that when the top threadbreaks, at any point betweenthe needle and the tension, the independent feed causes the top thread to slacken between the tension and bobbin, allowing the small spring lever to spring back to the position indicated by dotted lines in Fig. 2, and contact with the rod 2 carried in insulated bearings 'e Upon the shaft t' is mounted a cam i Fig. 5, and, therefore, when the sprin lever '11 comes into contact with the rod 6 t e circuit volves harmlessly, but when it falls to the horizontal position, as shown in dotted lines, it falls between the rotating cam it and the strap fork lever Z, forcing the latter out ofits retaining notch Fig. 7. The electric motor and strap fork displacing gear may be mounted upon a standard bracket 3' under the sewing machine table and supported therefrom or from the floor. A lug is formed in the bracket j, fig. 5, to which the strap fork lever lis pivoted at 9'. Therefore, when the lever Zis forced out of its retaining notch,

- tion, the strap fork lever I move the s ring 3' fig. 5, one end of which is secure to the lever l and the other to the 1 bracket ulls it over to the position shown in dotted nes, shifting the strap onto the loose pulley m, thereby stopping the machine.

To start the machine the thread is carried through the guides f, lig. 1, and tension 9, and then Ipulled tight, thereby breaking the contact, t e lever i lifted to its u right posig back into the retaining notch 1 Fig. 5, moving the strapljon the rotating pulley m, whereby the mac neis started.

What I claim and desire to secure by Letters Patent is 1. In combination with a sewing machine, having a needle, and operating means, means for stopping the operating means when the bobbin thread breaks, comprising a spring contact member, an electric circuit, a motor therein having a motor shaft, an'electric contact point located between the needle and the upper bobbin for completin the circuit with the spring contact mem er on the breaking of a thread, whereby the motor is started, a cam on the motor shaft, a lever actuated by said cam, and means for throwing the operating means of the machine out of gear on the actuating of said lever.

2. In a sewing machine having a tension, a needle and operating means, means for stopping the machine when a thread breaks or gives out, comprising an electric circuit, and a contact between said tension and the thread supply, a motor started on completing the circuit through said contact, and means operated by the motor for throwing the operating means out of gear, in combination with a feed mechanism for feeding the thread to cause a slack betweensaid tension and the thread supply. I

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

JAMES BEATTIE.

Witnesses:

JNo. HUGHES, J. ERNEST HUGHEs.

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