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US3763327A Expired / Lapsed US ⏱️ 0.0 years remaining

Magnetic head wheel rotor and transformer assembly with anti-rotation locking means

Assignee: Robert Bosch Fernsehanlagen GmbH
•
Filing: 1971-08-04
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Granted: 1973-10-02
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Expires: 1991-08-04
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Abstract

Abstract A device for recording signals on a magnetic tape or for reproducing signals therefrom of the type where a rotating head wheel is provided with at least one magnetic pick-up head. Such a device requires a signal repeater or transformer including a fixed and a rotating magnetic core interconnected by associated coils. The fixed part of the device including the fixed magnetic cores is normally fixed against rotation but may be unlocked to permit rotation so that the fixed portion of the device may be rapidly removed and exchanged. Further, the fixed portion of the device including the fixed magnetic cores is disposed about the rotating portion to facilitate removal thereof. This makes it possible to exchange the coils between associated pairs of magnetic cores to change the transformer ratio or to change the fixed portion of the device to permit reproducing or recording signals for optimum performance.

Inventors

  • 👤 M Hescher

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 12:47
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/52

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 137 words
In a device for recording or reproducing signals from tapelike magnetic means, the combination comprising, a rotatable head wheel operable for carrying at least one magnetic head, a stationary part including a flat surface arranged parallel to the plane of rotation of said head wheel, locking means secured to said flat surface, a repeater for transmitting signals from said magnetic head to said stationary part, said repeater including, a cylindrical portion connected axially to the head wheel, a tubular portion surrounding said cylindrical portion and being journalled thereon, and a support member secured to said tubular portion of said repeater and including a hook-shaped radial extension normally resting on said flat surface and being tiltable in opposite directions for engaging said locking means in the direction of rotation of said head wheel and, respectively, for releasing it.
Claim 2
Dependent Claim 137 words
In a device for recording or reproducing signals from tapelike magnetic means, the combination comprising, a rotatable head wheel operable for carrying at least one magnetic head, a stationary part including a flat surface arranged parallel to the plane of rotation of said head wheel, locking means secured to said flat surface, a repeater for transmitting signals from said magnetic head to said stationary part, said repeater including, a cylindrical portion connected axially to the head wheel, a tubular portion surrounding said cylindrical portion and being journalled thereon, and a support member secured to said tubular portion of said repeater and including a hook-shaped radial extension normally resting on said flat surface and being tiltable in opposite directions for engaging said locking means in the direction of rotation of said head wheel and, respectively, for releasing it.
Claim 3
Dependent Claim 22 words
In a device as defined in claim 1 wherein an air bearing is provided between said fixed portion and said rotatable portion.
Claim 4
Dependent Claim 54 words
In a device as defined in claim 1 wherein at least a transformer is provided, said transformer including a first coil associated with said tublar portion and a second coil associated with said cylindrical portion, at least one of said coils being exchangeable for another set of coils to provide a different transformer ratio.
Claim 5
Dependent Claim 24 words
In a device as defined in claim 1 wherein a different tublar portion of said repeater is provided for recording and for reproducing signals.

References Cited (Backward Citations)

US3179909A Cited
US3591732A Cited
US3531749A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-10-01 1977-04-02 1977-10-02 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-10-01 1981-04-02 1981-10-02 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-10-01 1985-04-02 1985-10-02 $7700.00 Window Closed / Lapsed

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