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. 25, 1977
Filed:
Feb. 03, 1975
Applicant:
Inventors:
Isao Matsumoto, Tokyo, JA;
Kenkichi Umeda, Tokyo, JA;
Assignee:
Sony Corporation, Tokyo, JA;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ; G06K / ;
U.S. Cl.
CPC ...
360 60 ; 235 / ;
Abstract
A tape cassette and machine wherein the tape cassette is provided with a breakable pin such that if the pin is removed the tape cannot be erased and wherein the machine includes a mechanism for detecting whether the pin is present in the cassette so as to properly interlock the machine to correlate with the presence or absence of the pin. As tape machines and cassettes are becoming smaller and smaller it is desirable to provide cassette mounting means and interlock mechanism which can be mounted in the minimum space.