US3715739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data processing cassette and spindle
Assignee: US Philips Corp
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Filing: 1971-09-10
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Granted: 1973-02-06
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Expires: 1991-09-10
Abstract
Abstract A cassette for use in a data processing apparatus, which cassette contains a magnetizable recording disc which is supported by a support provided with a central bore by means of which the cassette may be placed on the driving spindle of the apparatus. The cassette is provided with a clamping device in the form of a collet by means of which the cassette may be clamped and which is adapted to be operated by a handle hingedly connected to the cassette.
Inventors
- 👤 Acker P Van
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:27
CPC Classifications
G; G11; G11B; G11B17/00; G11B17/02; G11B17/022; G11B17/028; G11B17/03; G11B23/00; G11B23/02; G11B23/03; G11B23/032; G11B23/0321; G11B23/0322; G11B25/00; G11B25/04; G11B25/043
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
204 words
A cassette for use in an apparatus for processing data in the form of magnetic recordings, which cassette comprises a cover, a bottom and a side-wall within which is arranged at least one recording disc which is provided with a magnetizable material and is carried by a support which has a central bore by means of which it may be placed on a driving spindle of the apparatus, the cassette further comprising a clamping device by means of which the support may be clamped onto the driving spindle, an operating lever pivotally arranged on the cover, and means which under the influence of a pivotal movement of this lever can operate the clamping device, characterized in that the clamping device takes the form of a collet which extends in the bore of the support and is axially movable in this bore and, in a first position of the lever substantially at right angles to the cover, is in a retracted position in the bore under the influence of spring force and, when the lever is pivoted to a second and to a third position respectively, is movable from this retracted position against the spring force to an extended position and beyond this position respectively.
Claim 2
Dependent Claim
204 words
A cassette for use in an apparatus for processing data in the form of magnetic recordings, which cassette comprises a cover, a bottom and a side-wall within which is arranged at least one recording disc which is provided with a magnetizable material and is carried by a support which has a central bore by means of which it may be placed on a driving spindle of the apparatus, the cassette further comprising a clamping device by means of which the support may be clamped onto the driving spindle, an operating lever pivotally arranged on the cover, and means which under the influence of a pivotal movement of this lever can operate the clamping device, characterized in that the clamping device takes the form of a collet which extends in the bore of the support and is axially movable in this bore and, in a first position of the lever substantially at right angles to the cover, is in a retracted position in the bore under the influence of spring force and, when the lever is pivoted to a second and to a third position respectively, is movable from this retracted position against the spring force to an extended position and beyond this position respectively.
Claim 3
Dependent Claim
204 words
A cassette for use in an apparatus for processing data in the form of magnetic recordings, which cassette comprises a cover, a bottom and a side-wall within which is arranged at least one recording disc which is provided with a magnetizable material and is carried by a support which has a central bore by means of which it may be placed on a driving spindle of the apparatus, the cassette further comprising a clamping device by means of which the support may be clamped onto the driving spindle, an operating lever pivotally arranged on the cover, and means which under the influence of a pivotal movement of this lever can operate the clamping device, characterized in that the clamping device takes the form of a collet which extends in the bore of the support and is axially movable in this bore and, in a first position of the lever substantially at right angles to the cover, is in a retracted position in the bore under the influence of spring force and, when the lever is pivoted to a second and to a third position respectively, is movable from this retracted position against the spring force to an extended position and beyond this position respectively.
Claim 4
Dependent Claim
204 words
A cassette for use in an apparatus for processing data in the form of magnetic recordings, which cassette comprises a cover, a bottom and a side-wall within which is arranged at least one recording disc which is provided with a magnetizable material and is carried by a support which has a central bore by means of which it may be placed on a driving spindle of the apparatus, the cassette further comprising a clamping device by means of which the support may be clamped onto the driving spindle, an operating lever pivotally arranged on the cover, and means which under the influence of a pivotal movement of this lever can operate the clamping device, characterized in that the clamping device takes the form of a collet which extends in the bore of the support and is axially movable in this bore and, in a first position of the lever substantially at right angles to the cover, is in a retracted position in the bore under the influence of spring force and, when the lever is pivoted to a second and to a third position respectively, is movable from this retracted position against the spring force to an extended position and beyond this position respectively.
Claim 5
Dependent Claim
66 words
A cassette as claimed in claim 1, characterized in that the operating lever has at least two cam elements which are rotatable in planes at right angles to the pivot axis of the lever and extend through radially different distances relative to the pivot axis on either side of the longitudinal axis of the lever, which longitudinal axis is at right angles to the pivot axis.
Claim 6
Dependent Claim
44 words
A cassette as claimed in claim 2, characterized in that the operating lever takes the form of a U-shaped handle, the limbs of the U being hingedly connected to the cover of the cassette and each being provided with the said two cam elements.
Claim 7
Dependent Claim
161 words
A cassette as claimed in claim 3, characterized in that a hat-shaped element is provided which has a bottom portion, a sidewall portion and a rim portion, the collet being secured to the bottom portion, whilst the disc support is provided with a sleeve disposed concentrically with respect to the bore of the support and for guiding the sidewall portion of the hat-shaped element, a compression spring being arranged between the bottom portion of the hat and an end face of the sleeve, whilst two studs are provided which are axially displaceably guided in recesses formed in the cover of the cassette and each protrude through openings in the cover so as to bear against the rim portion of the hat and at the opposite end are maintained in engagement with the limbs of the U-shaped handle under the action of a spring force so as to be operable by the projections on the limbs during pivotal movement of the handle.
Claim 8
Dependent Claim
72 words
A cassette as claimed in claim 1, characterized in that the cover, the bottom and the sidewall of the cassette are rigidly interconnected and an opening is provided in the sidewall of the cassette which is closed by a plate-shaped element which is peripherally slidably guided in rebates made in the cover and in the bottom and which seals against the walls of the rebates under the influence of its own resilience.
Claim 9
Dependent Claim
138 words
A driving spindle suitable for co-operating with a cassette as claimed in claim 1, characterized in that in one of the spindle ends a first sleeve is axially arranged which is provided with at least one bore in the shape of a truncated cone, the Largest diameter of the cone being disposed towards the spindle end, whilst behind an end face of this sleeve remote from the spindle end there is a chamber in which a second sleeve is axially displaceably guided, the displacement thereof being limited in one direction by the said end face of the first sleeve and in the other direction by a radially extending wall part of the chamber, the second sleeve having a bore the diameter of which is substantially equal to the smallest diameter of the conical bore of the first sleeve.
Claim 10
Dependent Claim
158 words
A data processing cassette for containing magnetic disc recordings comprising a cover, a bottom and a side wall, a support within said cassette for carrying said magnetic disc, a central bore provided in said support for placing said cassette on a driving spindle of a data processing apparatus, a clamping device for clamping the support onto said driving spindle, an operating lever pivotally arranged on the cover, means for operating the clamping device upon pivotal movement of said lever, said clamping device comprising a collet extending into and axially movable within said central bore, said collet being in a retracted position within said bore when said lever is in a first position which is substantially at right angles to the lever, said collet being movable against the bias of a spring means to an extended operable position and a releasable position beyond said extended operable position when said lever is moved to a second and third position respectively.
Claim 11
Dependent Claim
158 words
A data processing cassette for containing magnetic disc recordings comprising a cover, a bottom and a side wall, a support within said cassette for carrying said magnetic disc, a central bore provided in said support for placing said cassette on a driving spindle of a data processing apparatus, a clamping device for clamping the support onto said driving spindle, an operating lever pivotally arranged on the cover, means for operating the clamping device upon pivotal movement of said lever, said clamping device comprising a collet extending into and axially movable within said central bore, said collet being in a retracted position within said bore when said lever is in a first position which is substantially at right angles to the lever, said collet being movable against the bias of a spring means to an extended operable position and a releasable position beyond said extended operable position when said lever is moved to a second and third position respectively.
Claim 12
Dependent Claim
34 words
The cassette according to claim 7 further comprising two cams of radially different heights mounted for rotatable movement at the ends of said lever for causing said collet to be moved to said positions.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |