US3637152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Endless tape cartridge containing a brake to prevent rotation of the reel
Assignee: Individual
•
Filing: 1968-11-04
•
Granted: 1972-01-25
•
Expires: 1988-11-04
Abstract
Abstract An endless magnetic tape cartridge has a rotatable reel supporting the tape coil and provided with a releasable brake to prevent slackness in the tape during handling and storage. The brake includes serrations inclined to the radii of the reel and a spring-biased locking lever pivoted intermediate a hooked locking end and a slotted end coupled to a T-shaped actuating slide. The actuating slide has an arm slidably mounted and a crossarm adjacent a front opening of the cartridge so that insertion of the cartridge into a player results in the player head engaging the crossarm of the actuating slide to shift it rearwardly to thereby pivot the hooked locking end of the brake from the serrated periphery of the reel to permit rotation of the endless tape.
Inventors
- 👤 Shinobu Okamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:29
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/22
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
160 words
An endless tape cartridge comprising a reel turntable, an endless tape spirally wound on said turntable, serrations formed around the periphery of said turntable and shaped as to prevent rotation by locking in the direction of rotation, a catch lever arm pivotally mounted on the base of the cartridge with a lock catch to engage one serration of the turntable at one end, and a slotted hole at the other end, a spring urging said catch lever to lock against the turntable at all times, means for releasing the catch lever comprising a sliding inverted ''''T''''-shaped member sliding between two guides molded into the base of the cartridge, the head of the member being positioned to bear against the tape head and the stem of the member mechanically connected to said slotted hole to rotate the catch lever arm and release the turntable by sliding inwards when pushed by the tape head when the cartridge is inserted in ''''play'''' position.
Claim 2
Dependent Claim
160 words
An endless tape cartridge comprising a reel turntable, an endless tape spirally wound on said turntable, serrations formed around the periphery of said turntable and shaped as to prevent rotation by locking in the direction of rotation, a catch lever arm pivotally mounted on the base of the cartridge with a lock catch to engage one serration of the turntable at one end, and a slotted hole at the other end, a spring urging said catch lever to lock against the turntable at all times, means for releasing the catch lever comprising a sliding inverted ''''T''''-shaped member sliding between two guides molded into the base of the cartridge, the head of the member being positioned to bear against the tape head and the stem of the member mechanically connected to said slotted hole to rotate the catch lever arm and release the turntable by sliding inwards when pushed by the tape head when the cartridge is inserted in ''''play'''' position.
Claim 3
Dependent Claim
52 words
A cartridge as defined in claim 1 wherein said cartridge includes a housing, said housing comprises a pair of cup sections, a flexible rib integral with one of the sections, a hook integral with the other section and interlocked with the rib to retain the cup sections in engagement with each other.
Claim 4
Dependent Claim
45 words
A cartridge as defined in claim 2 further including a tool opening in said one of the sections aligned with the rib whereby a tool can be inserted into said opening to engage the rib and pry the rib out of engagement with the hook.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |