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:
Jun. 17, 1997
Filed:
Jun. 01, 1995
Ming-Jer Chiu, Hsinchu, TW;
Jaw-Horng Tzeng, Fungsan, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
An improved brake mechanism for use with magnetic-drum tape machines is disclosed. It comprises a take-up reel, a supply reel, each having a gear and a roller body, and a friction device to provide frictional force during relative rotation between the respective pair of the gear and the roller body. The supply reel has a partial cylindrical portion, and a swing gear mechanism selectively engages with the gear of the take-up reel or the supply reel. A brake plate is mounted on the swing gear mechanism; it includes an auxiliary brake and a plurality of clutch teeth. When the swing gear mechanism is engaged with the supply reel or the take-up reel, the brake plate is driven in rotation to enable the clutch teeth to engage with the gear of the take-up reel or to enable the auxiliary brake to hold against the partial cylindrical portion of the supply reel to produce a brake force, and a main brake to engage with the supply reel. The main brake, swing gear, auxiliary brake and clutch teeth cooperate to match a operating mode of said magnetic tape machine to enable said supply and the take-up reels to exhibit variable brake force so as to provide a proper back tension on the tape.