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. 08, 1977
Filed:
Dec. 22, 1975
Frank H Banks, Wakefield, MA (US);
MFE Corporation, Salem, NH (US);
Abstract
A drive for a magnetic tape cassette. Edge and corner blocks mounted on a planar frame receive the leading edge of a magnetic tape cassette adjacent the corners thereof and position the cassette with respect to drive spindles which engage tape reels in the cassette and to a transducer located with respect to the blocks. The cassette has a notch offset from the center in the railing edge thereof. In one of two operating positions of the cassette, the notch registers with a switch, so the switch is not actuated. In the other position, the bottom surface of the cassette actuates the switch. A second switch registers with a selectively plugged recess in the trailing edge of the cassette thereby to enable or disable writing operations. A light source, disposed in the frame, transmits light along a first axis toward a detector housing. A prism in the housing intercepts and redirects the light toward a photosensitive detector. The tape interrupts the light beam except when an aperture in the tape passes the detector.