US301456A - And sewing machine com - Google Patents

Description

(No Model.)

' J. H. PALMER.

DRIVING PULLEY FOR SEWING MACHINES.

No. 301,456. Patented July 1,1884.

V flllfi UNITED STATES PATENT FFICE.

JOHN H- PALMER, OF PHILADELPHLA, PENNSYLVANIA, ASSIGNOR TO THE AMEBIGANBUTTONHOLE, OVENSEAMING AND SEY'VING MACHINE GOM- IANY, OF SAME PLACE.

DRlVlNG-PULL EY FOR SEWING-MACHlNES.

SPECIFICATION forming part of Letters Patent No. 301,456, dated July 1, 1884.

Application filed May 19, 1884. I (No model.) I

To aZZ whom it may concern:

Be it known that I, JOHN H. PALMER, of Philadelphia, in the State of Pennsylvania, have invented certain new and useful Im- 5 provements in Driving-Pulleys for Sewing Machines and other Light Machinery, of which the following is a specification.

In the accompanying drawings, Figure 1 is an end View of asewing-machine head or frame,

: illustrating the driving-pulley partly in section; and Fig. 2 is asection showing the means for connecting and disconnecting the drivingpulley and drivingshaft of the machine.

The enlarged or balancewheel part a of the r 5 driving-pulley A is keyed on the drivingshaft of the machine, while the grooved loose pulley b, which is driven by the band of the machine, rotates loosely on a hub formed with the part a between the balauce wheel and the frame of the machine. An annular dovetailed recess, 0, is formed in the face of the grooved pulley b next the balance-wheel a. The correspondingly-shaped head of a bolt, (Z, runs loosely in this annular dovetailed recess. The bolt is inserted through an aperture, c, in the pulley I), and,passing through the wheel c,is provided on its outer end with a thumb-nut. "When the thumb-nut is loosened, the pulley Z) will rotate without driving the wheel a and the main 3o shaft of the machine, because the head of the bolt will run loosely in the dovetailed recess in the bolt-pulley. When the thumb-nut is screwed up, however, the two wheels are firmly clamped together.

5 This device in sewing-machines may be used for the purpose of operating bobbin-winders. Such a bobbin-winder is illustrated in the lower half of 1. The winder ismounted on a bracket, G, which is formed with two cars or plates, 9, which are bolted to the frame of the machine, and a horizontal laterally-projecting plate, E. This plate carries two setscrews, h t, on which the horizontally-slotted bobbin-winder frame slides. The slotted bobbin-frame carries on one end a groovedpulley 5 adapted to engage with the driving band or cord of the machine to actuate the bobbinwinding spindle. The opposite end of the frame is preferably provided with a suitable handle for moving it back and forth. At the 5c end of the slot in the frame nearest the handle there is a depression, into which the screw 1 fits when the bobbin-frame has been thrust sufficiently forward, the frame being thrown up against the screw by a spring on the bracket. 5 5 In this position the pulley will be in engagement with the band of the machine, and bobbins may be wound.

A bobbin-winder has been illustrated and described merely as showing a useful application of the fast-and-loose-pulley arrangement in sewing machines. The bobbin winder, however, forms no part of the subject-matter claimed in this application, but is covered by another application filed by me on the 8th day of March, 1884, No. 123,523, of which case this application constitutes a division.

I claim as my invention The combination, substantially as set forth, of the driving-shaft, the wheel fast thereon, 7c the loosely-revolving pulley having a dovetailed annular recess in its side or face adjacent to said wheel, and the bolt which passes through the fixed wheel and has a clampinghead which runs in the annular recess in the pulley.

' In testimony whereof I have hereunto subscribed my name.

JOHN H. PALMER.

Witnesses:

SAML. VVrLcoX, W. M. BALDWIN.

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