Electric toothbrush

Details Electric toothbrush Electric toothbrush

1986-12-31

1989-01-10

Roberts, Edward L.

Brushing, scrubbing, and general cleaning

Machines

Brushing

200 6152, A46B 1302

Patent

active

047963239

ABSTRACT:
Electric toothbrush includes a hollow handle and a rotary brush connected to the handle. A gravity-induced movement responsive switch, such as mercury switch, is located within the handle, and a hand-operated switch is located on the outer surface of the handle. A user by operating a hand-operated switch sets the brush to a lower row of teeth or an upper row of teeth thus switching over an electromotor located within the handle whereas the mercury switch automatically reverses the direction of rotation of the electromotor shaft depending upon respective tilted positions of the handle.

REFERENCES:
patent: 2310626 (1943-02-01), Gold
patent: 2618797 (1952-11-01), Grover
patent: 3451086 (1969-06-01), Burgett
patent: 4275749 (1981-06-01), Caroli

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