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US3791604A Expired / Lapsed US ⏱️ 0.0 years remaining

Magnetic recording and/or playing back apparatus

Assignee: US Philips Corp
•
Filing: 1972-03-10
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Granted: 1974-02-12
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Expires: 1992-03-10
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Abstract

Abstract In an apparatus for recording and/or playing back magnetic recordings on and/or from a magnetic tape accommodated in a cassette, having at least one winding spindle adapted to be received in a flangeless winding core provided in the cassette, the winding spindle comprising a turntable which is mounted for rotation and has a sheath-like hub. A carrier element is mounted on this hub and has the shape of an ogival hat with radially projecting ogival carrier ribs. The turntable and the carrier element have abutment means which limit the relative rotation of the carrier element with respect to the turntable and by which the rotation of the turntable is imparted to the carrier element.

Inventors

  • 👤 M Meermans

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 19:28
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/26; G11B15/32

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 240 words
In an apparatus for recording and/or playing back magnetic recordings on and/or from a tape-shaped record carrier accommodated in a cassette having at least one bored flangeless winding core adapted to be placed on a winding spindle comprising a fixed axle mounted on said apparatus, a turntable rotatably mounted on an end of said axle, driving means carried by said apparatus for driving said turntable, a sheath-like hub carried on said turntable, a bearing element rotatably mounted at the end of said axle remote from said turntable, said bearing having a radially extending supporting surface resting on an end of said hub remote from said turntable, a carrier element in the shape of an ogival hat integral with said bearing element rotatably mounted on said hub, at least one radially projecting ogival shaped carrier rib mounted on said carrier element arranged for driving engagement with radial projections in the bore of the winding core of said cassette when said cassette is in place on said spindle, a first coupling member carried on said carrier element, a second coupling member carried on said turntable arranged for coupling engagement with said first coupling member when said turntable is driven so as to drive said carrier element, and abutment means mounted on said carrier element and said turntable for limiting rotatable movement of said carrier element with respect to said turntable and for imparting rotational movement of said turntable to said carrier element.
Claim 2
Dependent Claim 240 words
In an apparatus for recording and/or playing back magnetic recordings on and/or from a tape-shaped record carrier accommodated in a cassette having at least one bored flangeless winding core adapted to be placed on a winding spindle comprising a fixed axle mounted on said apparatus, a turntable rotatably mounted on an end of said axle, driving means carried by said apparatus for driving said turntable, a sheath-like hub carried on said turntable, a bearing element rotatably mounted at the end of said axle remote from said turntable, said bearing having a radially extending supporting surface resting on an end of said hub remote from said turntable, a carrier element in the shape of an ogival hat integral with said bearing element rotatably mounted on said hub, at least one radially projecting ogival shaped carrier rib mounted on said carrier element arranged for driving engagement with radial projections in the bore of the winding core of said cassette when said cassette is in place on said spindle, a first coupling member carried on said carrier element, a second coupling member carried on said turntable arranged for coupling engagement with said first coupling member when said turntable is driven so as to drive said carrier element, and abutment means mounted on said carrier element and said turntable for limiting rotatable movement of said carrier element with respect to said turntable and for imparting rotational movement of said turntable to said carrier element.
Claim 3
Dependent Claim 46 words
In the apparatus according to claim 1 wherein said hub part is cylindrical, and having a cylindrical collar about said hub part adjacent said turntable, and wherein said abutment on said turntable is formed by an interruption of said collar for a portion of its circumference.
Claim 4
Dependent Claim 33 words
In the apparatus according to claim 2 wherein said abutment on said carrier element comprises a cylindrical skirt having an axial projection extending in the area of said interruption of said cylindrical collar.

References Cited (Backward Citations)

US3456892A Cited
US3532293A Cited
US3666193A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-02-11 1977-08-13 1978-02-12 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-02-11 1981-08-13 1982-02-12 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-02-11 1985-08-13 1986-02-12 $7700.00 Window Closed / Lapsed

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