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:
Mar. 31, 1981
Filed:
May. 22, 1978
Sony Corporation, Tokyo, JP;
Abstract
A direction indicator for use in apparatus which includes a rotary member whose direction of rotation is determined by a command signal, the direction indicator providing an indication of the commanded direction just as, or momentarily prior to, the rotary member commences rotation in the commanded direction. A frequency generator generates a signal whose frequency is representative of the actual speed of the rotary member. A speed detector coupled to the frequency generator produces a pulse signal when the speed of the rotary member is less than a predetermined speed. A circuit is responsive to the direction command signal and is actuated by the pulse signal to provide an indicating signal corresponding to the direction of rotation determined by the command signal. The resultant indicating signal corresponds substantially to the actual direction of rotation of the rotary member.