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:
Nov. 24, 1992
Filed:
May. 22, 1990
Mitsuhiro Arai, Yokohama, JP;
Victor Company of Japan, Yokohama, JP;
Abstract
A cassette discriminating apparatus incorporated in a magnetic recorder for discriminating between a first cassette and a second cassette. The discriminating apparatus includes a supply reel drive for rotating the supply reel of the first cassette or of the second cassette, a take-up reel drive for rotating the take-up reel of the first cassette or of the second cassette, a first sensor for detecting the number of revolutions of each of the supply reel drive and the take-up reel drive, a second sensor for detecting the number of revolutions of a capstan, an arithmetic unit for computing the sum of a first square of the number of revolutions of the capstan per one revolution of the supply reel drive and a second square of the number of revolutions of the capstan per one revolution of the take-up reel drive, based on the outputs from the first and second sensors, respectively, a comparator for comparing the output from the arithmetic unit with a predetermined reference value to discriminate between the first cassette and the second cassette, and a tension control unit for controlling the tape tension according to the result of the discrimination by the comparator.