US2840022A - Bobbin winder - Google Patents

Description

June 24, 1958 5. J. HAMLETT BOBBIN WINDER Filed Oct. 31, 1955 IN V EN TOR.

SIDNEY J. HAMLETT v ig az ATTORNE United States Patent BOBBIN WINDER Application October 31, 1955, Serial No. 543,714

1 Claim. 01. 112-213 This invention relates to a sewing machine, and more particularly, to an improved and novel bobbin winder mechanism for a sewing machine.

It is a general object of this invention to provide a bobbin winder mechanism for a sewing machine which is simple in construction, efficient in operation, and wherein the bobbin can be quickly and easily mounted in a bobbin winding position and operatively connected to the power source for the sewing machine.

It is another object of the invention to provide a bobbin winder mechanism for a sewing machine of the type where a power source or motor is operatively connected to a hand Wheel through a friction driving member in contact with the hand wheel, and wherein the improved and novel mechanism for winding the bobbin includes a pivoted lever to engage and disengage the power source to correspondingly disengage and engage the driving member from the hand wheel and to utilize the power source to effect a bobbin winding operation when the powe source is disengaged from the hand wheel. 7

Further and additional objects and advantages not hereinbefore referred to will become apparent during the description of the embodiment of the invention which is to follow.

Referring to the accompanying drawing illustrating said embodiment of the invention and forming part of this specification,

Fig. 1 is an end elevational view of a sewing machine head embodying the invention;

Fig. 2 is a fragmentary side elevational view of the sewing machine head with a portion of the side of the machine broken away to show the bobbin winding mechanism on the opposite side of the head; and

Fig. 3 is a fragmentary top plan view of the sewing machine head as illustrated in Fig. 2 and shows in full lines the motor when operatively disengaged from the hand wheel and in bobbin winding position.

The sewing machine head comprises the usually vertically extending standard supported by the sewing machine bed 11, and having at its upper end the integral horizontally extending arm 12. The sewing machine head rotatably mounts in suitable bearings a horizontal main shaft 13 extending lengthwise of the arm 12 of the head and having permanently fixed thereto a hand wheel 14 as is well known. The rear side of the standard 10 has secured thereto a bracket 15 to which is pivotally connected the supporting arm 16 that is secured to and mounts the electric drive motor 17 for the sewing machine. Associated with the bracket 15 and the supporting arm 16 there is provided spring means 18 mounted on the pivot pin 20 in a conventional manner so as to constantly urge the motor 17 towards the machine head. The motor 17 mounted in this manner is movable towards and away from the standard 10.

The motor 17 in this instance is provided with a drive shaft 21 which is adapted to extend from both ends of the motor housing so as to operatively engage the hand r 2,840,022 Patented June 24, 19 58 wheel 14 during a sewing'operation and also to receive a bobbin to effect a bobbin winding operation. Theright hand end of the driving shaft 21, as shown in the drawings, is provided with a friction driving member or pulley 22 suitably secured thereto. The pulley 22 may be made of soft rubber or the like so as to frictionally drive the hand wheel 14 upon being positioned into contact therewith, in preparation for a sewing operation. The opposite end, the left hand end of the drive shaft 21 also extends from the motor housing and is adapted to receive the bobbin 23 by means of a spring clip or other convenient conventional means.

A control lever 24 is provided for moving the drive motor 17 away from the machine head against the action of spring 18 to cause the driving pulley 22 to respectively engage and disengage the hand wheel 14in response to the positions of the control lever. When the motor 17 is disengaged from the hand Wheel 14 it is then utilized to drive the bobbin 23, supported on the driving shaft 21, to receive thread from a spool 25 mounted on a stub shaft 26 provided on the top portion of the machine head in a conventional manner. The control lever 24 is pivotally mounted intermediate its ends by means of the pivot pin 27 secured to the back side of the sewing machine head ,to allow the lever to move between the motor 17 and the machine head.

The control lever 24 is provided with flanges 28 and 30 at each end. The flange 30, is provided to project farther than the flange 28 so as to receive a thread guide 31 at the extremity thereof. The height of the flange 28 is arranged so that upon pivoting the lever 24 between the drive motor 17 and the machine head, the motor is moved away from the machine head to cause the disen gagement of the pulley 22 with the hand wheel 14. A pin 32 or stopping means is provided on the machine head to limit the rotation of the lever 24, as may be readily seen in Fig. 2.

From the above structural arrangement, the operation of the bobbin winder mechanism should be readily apparent. Upon positioning the spool 25 on the shaft 26, the thread is passed from the spool through the thread guide 30 and secured to the bobbin 23. The control lever 24 is then positioned with the flange 28 abutting the motor 17 so as to move the driving pulley 22 out of engagement with the hand wheel 14 as shown in full lines in Fig. 3. The machine may now be started and the energization of the drive motor 17 will cause the thread from the spool 25 to be transferred onto the bobbin 23. Upon transferring the desired amount of thread onto the bobbin 23 the machine may be stopped and the bobbin 23 positioned on the shuttle for the machine in preparation for the sewing operation. The lever 24 may then be adjusted so as to cause the disengagement of the flange 28 from the motor 17, whereupon the driving pulley 22 is operatively connected with the hand wheel 14 by the action of spring 18 as shown in broken line position and the machine is then ready for the ensuing sewing operation.

Although a preferred embodiment of the invention has been illustrated and described, it will be understood the invention is not to be limited thereto, and may take various modified forms coming within the scope of the appended claim.

Having thus described my invention, I claim:

In a sewing machine head having a hand wheel connected to the operating shaft that is located in the horizontal arm of the head, a drive motor pivotally mounted on the side of the head and having a spindle both ends of which project from the motor housing and the axis of which is parallel to but spaced radially from said operating shaft, one of said spindle ends mounting a friction driving element adapted to engage the hand wheel conendsbeing adapted to mount a bobbin,'spring means normally urging said motor toward said head to engage said driving element with said hand wheel, a lever pivoted tosaid head intermediate the ends of the lever and pro vided on one end thereof with a flange which when said lever is swungin one direction is interposed between said head and motor and directly engages said motor to exert a force thereon tomove it against the action of said spring means and dise'ngagesaid driving element from said hand Wheel, s'aid lever being provided at its other end with a flange portion mounting a thread guide adapted to guide a thread to the bobbin mounted on said other end of said spindle, and stop means carried by said head and engageable by said lever 15 to limit movement of the latter in the direction wherein said flange is interposed between said head and motor or in the opposite direction.

References Cited in the file of this patent UNITED STATES PATENTS 1,658,458 Mross Feb. 7, 1928 2,018,624 Eames Oct. 22, 1935 2,173,286 Robert Sept. 19, 1939 FOREIGN PATENTS 433,923 Italy Apr. 15, 1948 516,183 Canada Aug. 30, 1955 1,032,251 France Mar. 25, 1953

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