Brake mechanism for magnetic-drum tape machines
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United States of America Patent
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-
Jun 17, 1997
Grant Date -
N/A
app pub date -
Jun 1, 1995
filing date -
Jun 1, 1995
priority date (Note) -
In Force
status (Latency Note)
Importance
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.
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