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:
Apr. 25, 1978
Filed:
Jun. 16, 1976
Jirou Kajino, Neyagawa, JA;
Naoyuki Ohara, Neyagawa, JA;
Matsushita Electric Industrial Co., Ltd., Osaka, JA;
Abstract
A device for detecting rotational speed of a tape reel in a tape recording and/or reproducing apparatus by displacing a magnet from a first position where said magnet does not actuate a magnetically sensitive element to a second position where said magnet actuates the element when the rotational speed of a first rotating means adapted to rotate in synchronization with a supply reel exceeds the constant speed of a second rotating means driven by a tape moving means to rotate at a constant speed and coupled to said first rotating means and operating indicating means responsive to said element so as to inform an operator, for example, that only a little tape remains on the supply reel.