Sewing machine with a printed circuit switch and variable speed control means

Claim 2

A sewing machine having a frame including a bed and a hollow standard rising therefrom, stitch forming instrumentalities and work feeding mechanism, a main-shaft operatively connected to said stitch forming instrumentalities and said work feeding mechanism, an electric motor operatively connected to said mainshaft, an operator-actuated foot controller for regulating the speed of operation of said motor, solid state circuit means coupled to said motor and controller and having terminals adapted to be connected to an external source of electrical energy, and variable speed switch means fixedly mounted within said sewing machine frame and coupled to said motor and said solid state circuit means for driving said motor in a forward and reverse direction.

Claim 3

A sewing machine according to claim 1 wherein said variable speed switch means comprises: a. an insulated board member fixedly mounted within said standard having a plurality of electrical switch contacts thereon, said contacts being adapted to be connected to said circuits means; b. a contactor arm member rotatably mounted parallel to said board member bearing electrical switch contacts for cooperation with said board switch contacts, the position of said contactor arm member determining which of said switch contacts are made or broken to effect the different operating conditions of said motor; c. control means coupled to said solid state circuit means and having a slidably mounted extending portion adapted to cooperate with said contactor arm; d. spring means adapted to cooperate with said extending portion and said contactor arm for biasing said extending portion and said contactor arm to a neutral position; and e. actuating means coupled to said contactor arm, whereby urging said actuating means in a first direction effects the position of said switch contacts causing said motor to operate in a forward direction and urging said actuating means in a second direction effects the position of said switch contacts causing said motor to operate in a reverse direction.

Claim 4

A sewing machine according to claim 2 wherein said actuating means causes said control means to increase the speed of said motor proportional to the distance said actuating means is moved.

Claim 5

A sewing machine according to claim 2 wherein said actuating means causes said switch contacts to de-energize said operator actuated foot controller when moved from the neutral position.

Claim 6

A sewing machine according to claim 2 further including a second solid state circuit means, fixedly mounted within said sewing machine frame and coupled to said motor, said second circuit means including said control means and having terminals adapted to be connected to said external source of electrical energy and to said switch contacts and being energized when said actuating means and said contactor arm are moved from the neutral position.

Claim 7

A sewing machine according to claim 2 wherein said switch means further includes contacts for de-energizing said foot controller when said actuating means is urged in either said first or second direction.

Claim 8

A sewing machine according to claim 2 further including a relay means fixedly mounted upon said sewing machine frame, said relay means being energized by said switch contacts and having contacts adapted to energize and de-energize said foot controller.

Claim 9

A sewing machine according to claim 5 further including connector means for removing said foot controller and permitting an operator to operate said sewing machine by utilizing said actuating means.

Claim 10

In a sewing machine having a frame including a bed and a hollow standard rising therefrom, stitch forming instrumentalities and work feeding mechanism, a main shaft operatively connected to said stitch forming instrumentalities and said work feeding mechanism, an electric motor operatively connected to said main shaft, an operator actuated foot controller for regulating the speed of operation of said moTor, and solid state circuit means coupled to said motor and controller and having terminals adapted to be connected to an external source of electrical energy, the improvement comprising: a. an insulated board member fixedly mounted within said standard having a plurality of electrical switch contacts thereon, said contacts being adapted to be connected to said circuit means; b. a contactor arm member rotatably mounted parallel to said board member bearing electrical switch contacts for cooperation with said board switch contacts, the position of said contactor arm member determining which of said switch contacts are made or broken to effect the different operating conditions of said motor; c. control means coupled to said solid state circuit means and having a slidably mounted extending portion adapted to cooperate with said contactor arm; d. spring means adapted to cooperate with said extending portion and said contactor arm for biasing said extending portion and said contactor arm to a neutral position; and e. actuating means coupled to said contactor arm, whereby urging said actuating means in a first direction effects the position of said switch contacts causing said motor to operate in a forward direction and urging said actuating means in a second direction effects the position of said switch contacts causing said motor to operate in a reverse direction.

Claim 11

In a sewing machine having a frame including a bed and a hollow standard rising therefrom, stitch forming instrumentalities and work feeding mechanism, a main shaft operatively connected to said stitch forming instrumentalities and said work feeding mechanism, an electric motor operatively connected to said main shaft, an operator actuated foot controller for regulating the speed of operation of said moTor, and solid state circuit means coupled to said motor and controller and having terminals adapted to be connected to an external source of electrical energy, the improvement comprising: a. an insulated board member fixedly mounted within said standard having a plurality of electrical switch contacts thereon, said contacts being adapted to be connected to said circuit means; b. a contactor arm member rotatably mounted parallel to said board member bearing electrical switch contacts for cooperation with said board switch contacts, the position of said contactor arm member determining which of said switch contacts are made or broken to effect the different operating conditions of said motor; c. control means coupled to said solid state circuit means and having a slidably mounted extending portion adapted to cooperate with said contactor arm; d. spring means adapted to cooperate with said extending portion and said contactor arm for biasing said extending portion and said contactor arm to a neutral position; and e. actuating means coupled to said contactor arm, whereby urging said actuating means in a first direction effects the position of said switch contacts causing said motor to operate in a forward direction and urging said actuating means in a second direction effects the position of said switch contacts causing said motor to operate in a reverse direction.