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:
Jul. 20, 1976
Filed:
Mar. 15, 1974
Yataro Kaiwa, Tokyo, JA;
Hiroshi Saito, Hasuda, JA;
Japan Servo Co., Ltd., Tokyo, JA;
Abstract
A light beam chopping or intercepting apparatus capable of repeatedly and sequentially intercepting and passing a light beam at a regular cycle by rotatively vibrating a disk-shaped vibrating body in a casing, wherein the disk-shaped vibrating body and the casing have transparent windows through which the light beam is passed. A detection coil and an excitation coil are mounted on the inner wall of the casing, in respective positions opposite to two magnets provided on the disk-shaped vibrating body. A transistor circuit having these coils on its base side and on its collector side, respectively, is operated as the vibration generating source. Coiled springs installed between the rotation center shaft and the casing provide the repeating vibration force. The number of vibrations can be arbitrarily changed, for example, by adjusting the spring constants of the coil springs.