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:
Aug. 05, 1980
Filed:
May. 09, 1978
Dean W Flygstad, St. Paul, MN (US);
James F Petelle, Hopkins, MN (US);
Telex Communications, Inc., Minneapolis, MN (US);
Abstract
A magnetic tape player-changer for sequentially playing endless, multi-track magnetic tapes housed in cartridges. The player-changer includes a magazine housing a plurality of cartridges, and a track along which the magazine is moved to sequentially position cartridges in a playing position. The magazine is provided with a surface having a plurality of intersecting, curved grooves, and the player-changer is provided with a driven, revolvable cam which rides in the grooves. The cam and grooves are so oriented as to smoothly advance the magazine to position sequential cartridges in the playing position with little noise. The player-changer includes transducer stepping and step-counting means for advancing a transducer from one pair of tracks to another of a tape and for counting the steps so as to advance a new cartridge into the playing position when all of the tracks of the previous tape have been played. Means are also provided to reverse the travel of the magazine to its original position when all of the tape cartridges have been played. The principles of our invention are also applicable to rotary magazines for continuously, sequentially indexing magnetic tape cartridges to a playing position.