US3936056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spindle depress/brake mechanism
Assignee: International Business Machines Corp
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Filing: 1975-03-17
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Granted: 1976-02-03
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Expires: 1995-03-17
Abstract
Abstract Spindle depress/brake apparatus in a disc dictation machine for depressing the record/playback spindle during a disc change cycle and for inhibiting rotational motion of the spindle after a new disc is loaded until the spindle properly engages a phasing slot in the disc. The apparatus includes a pivotally mounted bellcrank resiliently biased in a non-spindle depress direction. The bellcrank includes a Y-shaped first end engaging the spindle having a tooth for inhibiting rotation of the spindle and a second end which includes a cam surface, a mechanical latch and an adjustable stop. The spindle depress/brake apparatus is actuated by motion of the disc change loader carrier mechanism in the machine.
Inventors
- 👤 Forrest Wesley Breyfogle, III
- 👤 James Dudley Bruer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:17
CPC Classifications
G; G11; G11B; G11B17/00; G11B17/02; G11B17/04; G11B17/0401; G11B17/0402; G11B17/0404; G11B17/05; G11B17/051; G11B17/0515
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
200 words
In a disc dictation machine having a loader carrier for effecting a disc change cycle by ejecting a first disc from a record/playback station into an unload station and transferring a second disc from a load station into the record/playback station, apparatus for disengaging a disc in the record/playback station during the disc change cycle comprising: a spindle; a pivotally mounted bellcrank having one end thereof shaped for operatively engaging said spindle for depression thereof; cam means integral with the second end of said bellcrank; a first surface integral with said loader carrier for engaging said cam means and rotating said bellcrank to depress said spindle; latch means connected to the second end of said bellcrank lever; spring means connected to said latch means for actuation thereof to latch said bellcrank in the spindle position; a second surface integral with said loader carrier for engaging said latch means for unlocking thereof to release said spindle; spring means connected to said bellcrank lever for biasing said bellcrank lever out of contact with said spindle; and adjustable stop means attached to said second end of said bellcrank lever for inhibiting the motion of said bellcrank lever at a preselected non-spindle depression position.
Claim 2
Dependent Claim
200 words
In a disc dictation machine having a loader carrier for effecting a disc change cycle by ejecting a first disc from a record/playback station into an unload station and transferring a second disc from a load station into the record/playback station, apparatus for disengaging a disc in the record/playback station during the disc change cycle comprising: a spindle; a pivotally mounted bellcrank having one end thereof shaped for operatively engaging said spindle for depression thereof; cam means integral with the second end of said bellcrank; a first surface integral with said loader carrier for engaging said cam means and rotating said bellcrank to depress said spindle; latch means connected to the second end of said bellcrank lever; spring means connected to said latch means for actuation thereof to latch said bellcrank in the spindle position; a second surface integral with said loader carrier for engaging said latch means for unlocking thereof to release said spindle; spring means connected to said bellcrank lever for biasing said bellcrank lever out of contact with said spindle; and adjustable stop means attached to said second end of said bellcrank lever for inhibiting the motion of said bellcrank lever at a preselected non-spindle depression position.
Claim 3
Dependent Claim
48 words
The apparatus of claim 1 wherein said spindle includes integral lugs and said first end of said bell-crank lever further includes an integral tooth for engaging said lugs on said spindle to inhibit rotational motion of said spindle during phasing of a disc loaded into the record/playback station.
Claim 4
Dependent Claim
24 words
The apparatus of claim 1 wherein said latch means includes an arcuate surface of increasing radius for locking said latch at any position thereon.
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) | 1979-02-02 | 1979-08-04 | 1980-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-02 | 1983-08-04 | 1984-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-02 | 1987-08-04 | 1988-02-03 | $7700.00 | Window Closed / Lapsed |