US3838460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Video disk latching hub assembly
Assignee: Zenith Electronics LLC
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Filing: 1973-07-02
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Granted: 1974-09-24
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Expires: 1993-07-02
Abstract
Abstract Apparatus for releasably securing a video disc for playback includes a hub having an axial bore and means for supporting and indexing the disc. A post is journalled within the hub bore for axial displacement between an elevated quiescent position and a depressed actuated position. The post includes a detent which is engageable by a latch to releasably captivate the post when it is displaced to its actuated position. A biasing arrangement, in the form of multiple spring fingers, is coupled to the post and engageable with an indexed disc when the post is displaced to its actuated position to secure the disc upon the hub. The spring fingers also serve to return the post to its quiescent position when the latch and detent are disengaged.
Inventors
- 👤 D Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:53
CPC Classifications
G; G11; G11B; G11B17/00; G11B17/02; G11B17/022; G11B17/028; G11B17/0282; G11B19/00; G11B19/20; G11B19/2009
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
165 words
Apparatus for releasably securing a centrally apertured record disc for high speed rotation in a video disc player, said apparatus comprising: a hub having an axial bore, a relieved portion disposed effectively normal thereto, and means cooperable with the disc aperture for supporting and indexing a record disc; a post, comprising detent means, journalled within said hub bore for axial displacement between a quiescent position for admitting a record disc to said disc indexing and supporting means and an actuated position; latch means slidably disposed within said relieved portion of said hub and engageable with said post detent means for releasably captivating said post upon displacement of said post to its actuated position; and resilient biasing means coupled to said post and engageable with an indexed record when said post is displaced to its actuated position for securing said indexed disc upon said disc supporting means and for returning said post to its quiescent position upon disengagement of said latch means and said detent means.
Claim 2
Dependent Claim
165 words
Apparatus for releasably securing a centrally apertured record disc for high speed rotation in a video disc player, said apparatus comprising: a hub having an axial bore, a relieved portion disposed effectively normal thereto, and means cooperable with the disc aperture for supporting and indexing a record disc; a post, comprising detent means, journalled within said hub bore for axial displacement between a quiescent position for admitting a record disc to said disc indexing and supporting means and an actuated position; latch means slidably disposed within said relieved portion of said hub and engageable with said post detent means for releasably captivating said post upon displacement of said post to its actuated position; and resilient biasing means coupled to said post and engageable with an indexed record when said post is displaced to its actuated position for securing said indexed disc upon said disc supporting means and for returning said post to its quiescent position upon disengagement of said latch means and said detent means.
Claim 3
Dependent Claim
29 words
Apparatus as set forth in claim 1 which further includes means external to said hub and engageable with said latch means for releasing said post from its actuated positioN.
Claim 4
Dependent Claim
36 words
Apparatus as set forth in claim 1 in which said disc supporting and indexing means comprises a shelf formed on said hub and a conical pedestal extending from said shelf for cooperating with the disc aperture.
Claim 5
Dependent Claim
42 words
Apparatus as set forth in claim 3 in which said resilient biasing means comprises a plurality of spring fingers and said pedestal includes a like plurality of relieved portions for receiving and guiding said spring fingers into engagement with an indexed disc.
Claim 6
Dependent Claim
42 words
Apparatus as set forth in claim 1 in which said detent means comprises at least two stops axially spaced along said post and sequentially engageable with said latch means for releasably captivating said post, alternately, in said quiescent and said actuated positions.
Claim 7
Dependent Claim
65 words
Apparatus as set forth in claim 5 in which said latch means comprises a pin having a reduced central section, a crown portion at one extremity of said pin and a collar portion intermediate said reduced section and said crown portion, and further comprises means for urging one of said crown and collar portions in engagement with that one of said detent stops presented thereto.
Claim 8
Dependent Claim
93 words
Apparatus as set forth in claim 6 in which said post comprises a bipartite assembly comprising a sleeve and a rod coaxially mounted therein, said sleeve and said rod each having an axially disposed slot for receiving said reduced section of said pin, said sleeve slot including one of said detent stops for engaging said latch pin crown to retain said post in said actuated position, and said rod including, another of said detent stops for engaging said latch pin collar to retain said rod and said sleeve within said hub axial bore.
Claim 9
Dependent Claim
33 words
Apparatus as set forth in claim 7 in which said rod includes cam means for displacing said latch pin crown from said sleeve detent when said rod is elevated toward said quiescent position.
Claim 10
Dependent Claim
22 words
Apparatus as set forth in claim 1 in which said detent means comprises a pair of abutments integrally formed of said post.
Claim 11
Dependent Claim
39 words
Apparatus as set forth in claim 9 in which said latch means comprises a plate having a cut out for receiving and engaging said post detent means, and means for urging said plate into engagement with said detent means.
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) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |