US3794265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reel clamp
Assignee: INT VIDEO CORP
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Filing: 1972-10-24
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Granted: 1974-02-26
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Expires: 1992-10-24
Abstract
Abstract A tape reel clamp which securely and accurately holds a tape reel on a spindle, the reel clamp having a finger lever linked to a wedge member which is slidably engagable with a pair of retractable fingers. The fingers are extendable over a tape reel hub mounted on the spindle, the pressure exerted on the hub being determined by a spring bias, the spring bias being opposed by said lever when retracting said fingers.
Inventors
- 👤 J Jantzen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:26
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/60; G11B15/66; G11B15/662; Y; Y10; Y10T; Y10T403/00; Y10T403/59; Y10T403/598
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
97 words
A clamping mechanism for releasably holding a member on a spindle comprising: a. a vertically displaceable wedge member operatively connected to the spindle having at least one cam surface, b. at least one horizontally retractable finger having a cam surface slidably engageable with a cam surface of said wedge member, c. biasing means for pressure biasing said cam surface of said finger against a cam surface of the wedge member, and d. means for vertically displacing said wedge member and by cam action of said cam surfaces causing said finger to be retracted against said biasing means.
Claim 2
Dependent Claim
97 words
A clamping mechanism for releasably holding a member on a spindle comprising: a. a vertically displaceable wedge member operatively connected to the spindle having at least one cam surface, b. at least one horizontally retractable finger having a cam surface slidably engageable with a cam surface of said wedge member, c. biasing means for pressure biasing said cam surface of said finger against a cam surface of the wedge member, and d. means for vertically displacing said wedge member and by cam action of said cam surfaces causing said finger to be retracted against said biasing means.
Claim 3
Dependent Claim
24 words
The clamping mechanism of claim 1 wherein said means comprises a lever and a link, said link connecting said lever and said wedge member.
Claim 4
Dependent Claim
14 words
The clamping mechanism of claim 1 wherein said biasing means comprises an elongated spring.
Claim 5
Dependent Claim
95 words
A clamping mechanism for releasably holding a reel on a spindle comprising a. a vertically displaceable wedge member operatively connected to the spindle having facing cam surfaces, b. a pair of horizontally opposed fingers having ends extendible from the spindle and cam surfaces concomitant with the ends of the fingers, said cam surfaces slidably engagable with the cam surfaces of the wedge member, c. biasing means for separating said fingers and maintaining said cam surfaces of said fingers against said cam surfaces of said wedge member, and d. means for vertically displacing said wedge member.
Claim 6
Dependent Claim
95 words
A clamping mechanism for releasably holding a reel on a spindle comprising a. a vertically displaceable wedge member operatively connected to the spindle having facing cam surfaces, b. a pair of horizontally opposed fingers having ends extendible from the spindle and cam surfaces concomitant with the ends of the fingers, said cam surfaces slidably engagable with the cam surfaces of the wedge member, c. biasing means for separating said fingers and maintaining said cam surfaces of said fingers against said cam surfaces of said wedge member, and d. means for vertically displacing said wedge member.
Claim 7
Dependent Claim
34 words
The clamping mechanism of claim 4 wherein said means for vertically displacing said wedge member comprises further, a lever pivotally connected to said spindle and a link connecting said lever to said wedge member.
Claim 8
Dependent Claim
22 words
The clamping mechanism of claim 4 wherein said biasing means comprises a pair of elongated parallel springs between said horizontally opposed fingers.
Claim 9
Dependent Claim
32 words
The clamping mechanism of claim 4 wherein said ends of said fingers, extendible from the spindle, are chamfered to compensate for variations in the thickness of a reel held on the spindle.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |