US2086830A

US2086830A - Sewing machine attachment

Info

Publication number: US2086830A
Application number: US78763A
Authority: US
Inventors: Columbus T Thompson
Original assignee: Individual
Current assignee: Individual
Priority date: 1936-05-09
Filing date: 1936-05-09
Publication date: 1937-07-13
Anticipated expiration: 1954-07-13

Description

y 1937. c. T. T'HMPSON SEWING MACHINE ATTACHMENT Filed May 9, 1936 2 Sheets-Sheet 1 ATTORNEY.

July 13, 1937. c. T. THOMPSON 2,086,830

SEWING MACHINE ATTACHMENT Filed May 9, 1936 2 Sheets-Sheet 2 V 65 4/7255 mzzyasa/g IINVENTOR.

} ATTORNEY.

Patented July 13, 1937 UNITED STATS 1 Claim.

This invention relates to a sewing machine attachment and more particularly to a battery for operating the sewing machine.

This invention further relates to the battery and electric motor which may be attached to any make of sewing machine.

This invention further provides a sewing machine operating attachment which is simple in construction and easy of operation.

Other objects and advantages will be under stood from the following description of the speciflc embodiment when read in connection with the accompanying drawings in which:

Figure 1 is a front elevation of a part of a sew- 5 ing machine showing the improved attachment secured thereto.

Figure 2 is a view in side elevation of a sewing machine disclosing the attachment secured thereto.

Figure 3 is a sectional view of the upper portion of a battery and its container.

Figure 4 is a plan view of the battery in its container. 7

Figure 5 is a sectional view of the top of the sewing machine disclosing the switch means for operating the motor.

Figure 6 is a modification of the attachment shown in Figure 1, and is a front elevational view of a sewing machine with the novel attaching means secured thereto.

Figure 7 is a sectional view taken on line 'l-I of Figure 6 disclosing the motor and switch means.

Figure 8 is side view of a guard for the belt carrying wheel of the motor.

Figure 9 is a perspective view of an idler pulley for the belt.

A sewing machine 20 has the usual bracket arm 22; and the main shaft 24 has a fly-wheel 26 mounted thereon. A battery 28 is adapted to be placed in a box 30 which box is secured to the lower portion of the frame of the sewing machine 20. The box 30 has a hinged door 32 through which the battery 28 is inserted. There are

terminal contacts

34 and 36 secured to the top portion of the battery box 30. The numeral 38 indicates the battery terminal posts.

An electric motor 40 is secured to the end of a lever arm 58 which arm is pivoted by bolt means 46 to a bracket 44 which is secured to the top 2| of the sewing machine 20. The shaft 48 of the motor 48 carries a wheel 50 on its inner end. There is a rod 52 extending upwardly from the treadle 54, and a cord, rope or other suitable connecting means 56 which connects the rod 52 with the lever arm 58. The rope 56 is trained around a pulley (ill fastened beneath the top portion 2! of the sewing machine Zll. A coil spring 62 is connected at one end to the treadle M, and at its other end to the frame of the sewing machine 26.

The battery 28 has conductors 64 and 36 connected to the terminal posts 38. The conductor 65 leads to a contact plate 63 beneath the top 2! ofthe sewing machine 2&3. There is a second contact plate 'lii secured beneath the top 2! of the sewing machine 29 and is spaced apart from the contact plate 5.38. The conductor 65 leads from the battery 28 to the electric motor it and a conductor 72 leads from the contact plate ii! to the motor 40. The conductors 5% and 72 extend through an aperture is in the top portion of the sewing machine 26. The cable 56 carrying a metal ring 16 extends through an aperture 78 in the top portion 25 of the sewing machine.

When it is desired to operate the sewing machine, the treadle 54 is depressed and the rod 52 and rope 56 pull the lever arm 58 down and the lever arm 58 raises the motor 46 so that the wheel 5E3 frictionally engages the fly-wheel 26 of the sewing machine. At the same time the ring T6 on the rope 55 is carried downward and contacts the plates 58 and ill thereby closing the circuit between the battery 28 and the electric motor 4t, and the sewing machine is now operating.

In the modification shown in Figures 6 to 9 inclusive, the motor 80 is adapted to be mounted on the lower portion of the sewing machine frame 52. The motor 80 is secured to the frame 82 by bolt means so that it can be raised and lowered.

as desired. A coil spring 8| is connected between the motor 80 and the frame 82 of the sewing machine 20. The treadle 54 is connected by a rod 8 3 to an arm 86 of the motor Bill. The electric motor 80 has another arm 88 which has a contact arm 90 mounted on its outer end. The contact arm 90 is adapted to engage a contact plate 95. A conductor 92 leads from the terminal posts 38 of the battery 28 to the contact arm 90. The other battery conductor 9 is connected to the motor 8!]. A conductor 96 leads from the contact plate 9! to the electric motor 80.

A wheel 98 is connected on one end of the shaft 8-39 of the motor 80. A belt 102 is trained over the wheel 98 and through apertures IM and Iilii to the grooved pulley 21 on the shaft 24 of the sewing machine 20. The belt I02 is trained over an idler pulley I08 of V-shap-ed construction spaced in the aperture I64. The wheel 98 has a guard I I0 which is adapted to prevent the belt 82 from jumping off.

The operation of the modified device is as follows: The treadle 54 is pressed down and the rod 84 pulls down the motor 80 and as the motor 86 is pulled down, the arm 88 of the motor brings the contact arm 98 into contact with the plate 9!, and the circuit is closed between the battery 28 and the motor 80. As soon as the circuit is closed between the battery 28 and the motor 88, the sewing machine begins to operate. When the treadle is allowed to rise, the coil spring raises the motor 88 and the contact arm 98 disengages the contact plate 9|, and the circuit between the battery 28 and the motor 88 is broken.

The apparatus shown in the drawings and de-' cribed in the specification are merely illustrative and the invention is not limited thereto since alterations and modifications will readily suggest themselves to persons skilled in the art without departing from the true spirit of this invention or the scope of the annexed claim.

What I claim as new is:

Incombination with a sewing machine having a fiy-wheel and a treadle, a battery, an electric motorhaving a grooved wheel mounted on its shaft for engaging the said fiy-wheel, and the said electric motor being mounted on the end of a lever arm, the battery adapted to be in circuit with the electric motor, means connecting the treadle to the lever arm of the electric motor whereby the grooved wheel of the electric motor may be brought into engagement with the said fly-wheel, and a ring means secured to the said connecting means for closing the said circuit between the battery and electric motor.

COLUMBUS T. THOMPSON.