US1606700A - Motor bracket for sewing machines - Google Patents

Description

Nov. 9 1926. I

F. DIEHL MOTOR BRACKET FOR SEWING MACHINES Filed May 25, 1923 2 Sheets-Sheet l INVENTOR WITNESSES m 106%.

TTORNEY Nov. 9 1926.

F. DIEHL MOTOR BRACKET FOR SEWING MACHINES Filed May 25, 1923 2 Sheets-Sheet 2 ATTORNEY WITNESSES my Alli/ w W 7M Patented Nov. 9, 1926.

FREDERICK DIEHL, OF ELIZABETH, NEW JERSEY, ASSIGNOR TO THE SINGER MANU- FACTURING CQMPANY, OF ELIZABETH, NEW/V J'EBHEY,

JERSEY.

A CORPORATION OF NEW MOTOR BRACKET FOR SEWING MACHINES.

' Application filed May as, 1923. Serial No. 640,813. 7

This invention relates to motor-brackets for sewing machine and has for an object to provide a bracket by means of which an electric motor may be applied to various 5 types of sewing machine frames, not specially provided with a motor-supporting seat.

A further object of the invention is to provide a motor-supporting bracket which .0 may be applied to sewing machines of va-.

rious types without necessitating special machining operations, such as drilling, tapping, etc.

In the application of M. Hemleb, Serial No. 383,708, for example, there is disclosed a motor which is adapted to be applied to a seat specially provided on the vertical member of the sewing machine gboseneck. Machines have for many years commonly been 50 manufactured with this seat which was originally designed for reception of a hand-driving attachment.

The frames of earlier sewing machines, however, are not provided with the hand- !5 driving attachment seat or other specially machined portions and the mounting of a motor on the frame of such machines would necessitate special machining operations, such as drilling, tapping, and the like, which the average user does not have the ability or equipment to perform.

The present motor-supporting bracket is of such a character that it may be secured to a sewing machine frame at a moments notice by one not possessed of mechanical skill or equipment, thereby adapting the machine for reception of a driving motor.

To'the ends in view there is provided a bracket preferably having spaced arms adapted to clampingly embrace the vertical member of the sewing machine gooseneck; the bracket being formed with a, motor-supporting seat machined and tapped to receive a motor. Preferably, the bracket comprises an upward extension of circular outline adapting it to be substituted for the removable cover-plate which closes the usual opening provided at the rear side of the hollow gooseneck adjacent the bend of the latter, for access to the mechanism within the goose neck. This extension assists in supporting and locating the bracket and motor in operative position, and may be provided with an ear for reception of the lighting device mounted on a pivot at the front side of,

the gooseneck standard. The bobbin winder may be swung forwardly about its pivot to carry its pulley into engagement with the belt, when it is desired to wind a bobbin,

after which it may be pushed back to inoperat-ive position.

In the accompanying drawings, Fig. 1 is a fragmentary front elevation of a sewing machine equipped with the present motor. attachment bracket. view of the machine. Fig. 3 is a rear end elevation of the machine and Fig. 4 is a perspective view of the bracket.

The sewing machine frame comprises the usual bed l and hollow gooseneck 2, the vertical member or standard 3 of which rises from the bed 1. The sewing machine has the usual main-shaft a which carries the balance-wheel 5 grooved at 6 forthe driving-belt. mounted at 7 on the front side of the goose neck standard 3 the usual bobbin-winder 8 raving a grooved driving pulley 9. The gooseneck 2 is formed at its rear side adjacent its bend with the usual opening 10, which is closed by the'usual cover-plate (not shown) customarily secured over the opening 10 by means of the thumb-screw 11.

There are many machines in use, the beds and goosenecks of which are smooth and have no machined portions, except as above described which can be utilized for supporting a motor, and the present bracket is intended to adapt such machines for the ready reception of a driving motor, preferably in such wise that the entire equipment may be housed within the usual drop-head sewing machine cabinet or portable case.

The present bracket preferably comprises the spaced outer and inner arms 12, 13, respectively, which are connected by the yoke 14 having an upward extension 15 in-the form of a cover-plate of circular outline, adapted for substitution for the usual cover plate which closes the opening 10 at the bend of the sew- Fig. 2 is a top plan The machine also has pivotally a central 'verticalrib- 21 tapped at 22 for reception of the screw 23 which secures the motor 24 and its bracket 25in operative po- .sition closely adjacent the rearward side of the standard 3. The motor 24 and bracket 25 are preferably constructed substantially in accordance with the disclosure of the said application of M, Hemleb, Serial No. 383,708, and the application of M. Hemleh and F. Diehl, Serial No. 498,316; the entire outfit being thereby adapted for housing within the cavity of the usual drop-head sewing machine cabinetor portable case without the necessity of shifting or removing the motor from operative position on the sewing machine frame.

The arms 12 and 13 embrace the sewing machine standard 3, preferably by a clamping engagement, and one or more thumbscrews 26, 27 which impinge upon the smooth wall of the standard 3, may be provided to facilitate such engagement. The arm 12 may be provided with the forward extension 28 carrying the bearing screw 29 for the idler pulley 30. The motor may be equipped with the spring pressed arm 31 carrying the belt-ten'sioning idler pulley 32.

The cover-plate 15- The bobbin-winder 8 may be swung about its pivot 7 to dotted line position, Fig. 3, for bobbin-winding purposes; the driving belt 38 running in a triangular course over the motor pulley 34, idler pulley 30jand balancewheel pulley 6.

The bracket is preferably stamped and bent up out of one piece of sheet-metal and the arms 12 and 13, particularly the latter,

plate to embrace the vertical lmemberoi said gooseneck, the outer one of said arms being formed with. a motor-supporting seat.

9,. A sewing machine motor adapter bracket comprising a cover-plate adapted to close the usual opening at the rear side of a sewing machine gooseneck, spaced arms integral with and below said cover-plate and extending transversely of the plane of the cover plate to embrace the vertical member of said gooseneck, the outer one of said arms being formed with a motor-supporting seat, and a forward extension, and a belt pulley mounted on said extension.

In testimony whereof, I have signed my name to this specification.

FREDERICK DIEHL.

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