The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 04, 1977
Filed:
Nov. 16, 1973
Robert E Lewis, Peach Bottom, PA (US);
Schick Incorporated, Lancaster, PA (US);
Abstract
A motor-driven electric shaver operable over a wide range of alternating line voltages includes a capacitor for supplying unidirectional current to the motor. The capacitor is periodically charged through a current switching device serially located between the line and the capacitor. The switching device is rendered conductive only when the instantaneous voltage level of the applied line current is less than a predetermined level such that the average voltage developed across the capacitor and applied to the motor corresponds to the nominal requirements of the motor. Since the switching device is operated in either a saturated or nonsaturated state, power dissipation within the shaver is minimized.