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:
Jun. 27, 1978
Filed:
Jun. 03, 1975
Applicant:
Inventors:
Ken Satoh, Hachioji, JA;
Yoshio Tomizawa, Tama, JA;
Assignee:
Olympus Optical Co., Ltd., Tokyo, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06M / ; G11B / ; G11B / ;
U.S. Cl.
CPC ...
235 / ; 242 57 ; 242191 ;
Abstract
A tape ending indicator comprises a flip-flop circuit responsive to a pulse signal derived from a rotating tape for producing a pulse of an increased width, which is applied to one input of an AND circuit which also receives count pulses of a given, constant frequency from a suitable source. The number of count pulses which are contained in the output signal from the AND circuit is counted in order to detect a change of the count above a first value or below a second value as the diameter of the roll of the taken up tape increases or decreases, thereby indicating the ending of the tape.