US3756521A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Winding device for recording and/or play-back apparatus
Assignee: US Corp
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Filing: 1971-04-26
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Granted: 1973-09-04
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Expires: 1991-04-26
Abstract
Abstract A winding device for tape transducing apparatus, comprising a reel hub, having radially, outwardly extending projections, and a reel core provided with a central bore having radially, inwardly extending projections. The projections of said hub and bore cooperate with one another by means of driving surfaces which are inclined in the winding direction with respect to a plane extending at right angles to the axis of the hub and bore respectively.
Inventors
- 👤 F Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:59
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/32; G11; G11B; G11B15/00; G11B15/18; G11B15/26; G11B15/32
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
208 words
A winding device for use in a recording and/or playback apparatus comprising a supporting surface, a reel hub for mounting on a part of said apparatus, a reel core for carrying a tape shaped record carrier supported by said supporting surface and carried by said reel hub, said reel core having a central bore through which said reel hub is extended, a plurality of doglike projections protruding from the circumference of said reel hub, and a like number of dog-like projections extending from the inner surface of the bore of said reel core, said dog-like projections on said reel hub and said dog-like projections on said reel core arranged for driving engagement with each other, each of said dog-like projections having a driving surface which are in contact with each other when said projections are engaged, said driving surfaces lying-in a plane tangent to the point of contact betwen them, said plane forming an acute angle with said supporting surface when said projections are in engagement such that when said reel core is driven by said reel hub said tangential plane forming said acute angle with the supporting plane will have a directional component in the same direction as the vector of angular velocity of the reel hub.
Claim 2
Dependent Claim
208 words
A winding device for use in a recording and/or playback apparatus comprising a supporting surface, a reel hub for mounting on a part of said apparatus, a reel core for carrying a tape shaped record carrier supported by said supporting surface and carried by said reel hub, said reel core having a central bore through which said reel hub is extended, a plurality of doglike projections protruding from the circumference of said reel hub, and a like number of dog-like projections extending from the inner surface of the bore of said reel core, said dog-like projections on said reel hub and said dog-like projections on said reel core arranged for driving engagement with each other, each of said dog-like projections having a driving surface which are in contact with each other when said projections are engaged, said driving surfaces lying-in a plane tangent to the point of contact betwen them, said plane forming an acute angle with said supporting surface when said projections are in engagement such that when said reel core is driven by said reel hub said tangential plane forming said acute angle with the supporting plane will have a directional component in the same direction as the vector of angular velocity of the reel hub.
Claim 3
Dependent Claim
32 words
The winding device according to claim 1, wherein the driving surface of the dog-like projections of the hub and the driving surface of the dog-like projections of the core are flat surfaces.
Claim 4
Dependent Claim
87 words
The winding device according to claim 2, wherein each of the dog-like projections On the reel hub have two driving surfaces, each of which are mirror images of the other with respect to a plane containing the axis of said hub, and each of the dog-like projections on the reel core have two driving surfaces, each of which are mirror images of the other with respect to a plane containing the axis of said reel core, said two driving surfaces of each dog-like projection forming a wedge.
Claim 5
Dependent Claim
14 words
The winding device according to claim 3, wherein the dog-like projections have rhombus-shaped cross-sections.
Claim 6
Dependent Claim
44 words
The winding device according to claim 1, wherein the dog-like projections on the hub and on the core are cylindrical extensions, said dog-like projections on the core being spaced from said supporting surface by a distance smaller than the dog-like projections on the hub.
Claim 7
Dependent Claim
25 words
The winding device according to claim 5 wherein said cylindrical extension forming said dog-like projections are tapped toward their full ends thus forming truncated cones.
Claim 8
Dependent Claim
23 words
The winding device according to claim 1 wherein said supporting surface for said reel core is a turntable secured to the reel hub.
Claim 9
Dependent Claim
31 words
The winding device according to claim 1 further comprising a cassette for housing said winding device, said supporting surface for the core being one of the main surfaces of said cassette.
Claim 10
Dependent Claim
81 words
A reel core for use in a winding device for carrying thereabout a tape-shaped record carrier comprising a central bore to be mounted on a hub of the winding device, and at least one dog-like projection radially protruding into said central bore, at least one driving surface provided on said projection for cooperation with said hub, said driving surface being inclined in the direction of winding with respect to a plane extending at right angles to the axis of the bore.
Claim 11
Dependent Claim
81 words
A reel core for use in a winding device for carrying thereabout a tape-shaped record carrier comprising a central bore to be mounted on a hub of the winding device, and at least one dog-like projection radially protruding into said central bore, at least one driving surface provided on said projection for cooperation with said hub, said driving surface being inclined in the direction of winding with respect to a plane extending at right angles to the axis of the bore.
Claim 12
Dependent Claim
14 words
The reel core according to claim 9, wherein said projection has a rhombus-shaped cross-section.
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |