Sewing machine with a universal motor

Details Sewing machine with a universal motor Sewing machine with a universal motor

1983-07-22

1984-10-23

Truhe, J. V.

Electricity: motive power systems

Alternating current commutating motors

Universal or a.c.-d.c. motors

318345B, 318345C, 318345CB, 318345G, H02P 736, H02K 2364

Patent

active

044790775

ABSTRACT:
In a sewing machine with a universal motor, a speed control for the motor, a lamp, and a plug connection on the sewing machine housing for connecting the power supply and speed control lines to the motor and to the lamp, for equivalent replacement of the normal impedance starter by one with integrated phase angle control, a phase angle control is provided as a speed controller which comprises a rectifier bridge consisting of diodes for current supply to the phase angle control and to the lamp, as well as a rectifier bridge with semiconductor devices controlled by the phase angle control, for the control of the motor. To leave the known three-terminal plug connection on the sewing machine housing for the connection both of the power supply and for the phase angle control, the power supply leads are connected at both rectifier bridges, the negative terminals of which are connected to the common terminal of the motor and lamp, which the positive terminal of the phase angle-controlled rectifier bridge is connected to the second terminal of the motor. The positive terminal of the diode rectifier bridge is connected to the second terminal of the lamp.

REFERENCES:
patent: 3447055 (1969-05-01), Mason
patent: 3849710 (1974-11-01), Mason
patent: 3952241 (1976-04-01), Takemura et al.

Affiliated with

Also associated with

Rating

Sewing machine with a universal motor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Sewing machine with a universal motor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sewing machine with a universal motor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1601189