Vibrator for furniture

Details Vibrator for furniture Vibrator for furniture

1983-04-04

1985-10-01

Duggan, Donovan F.

Electricity: motive power systems

Reciprocating or oscillating motor

Energizing winding circuit control

318130, 318132, 128 33, H02K 3300

Patent

active

045448671

ABSTRACT:
A vibrator control circuit is provided for controlling the driving current supplied to the driving coil of an electromagnetic vibrator for a bed or the like. The control circuit is adapted to be connected to source of A.C. line voltage such as a standard wall outlet and controls the duration of the portion of each cycle of the A.C. line voltage supplied to the vibrator. The control circuit includes an electronic switch, e.g., a transistor, connected in series with the driving coil of the vibrator and a control pulse generator for supplying control pulses to the electronic switch to control switching of the electronic switch in timed relationship with respect to the A.C. line voltage waveform so as to gradually vary the duration of the portion of the A.C. line voltage supplied to the electromagnetic vibrator during each cycle of the A.C. line voltage.

REFERENCES:
patent: 3400316 (1968-09-01), Kuschel
patent: 3454957 (1969-07-01), Chaplenko
patent: 3474314 (1969-10-01), Ito
patent: 3649893 (1972-03-01), Lajoie
patent: 3798521 (1974-03-01), Berney
patent: 3806781 (1974-04-01), Berney
patent: 4370602 (1983-01-01), Jones, Jr. et al.
patent: 4371815 (1983-02-01), Jones, Jr. et al.
patent: 4401925 (1983-08-01), Brander

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