Patent US3846837A successfully refreshed from Google Patents.
US3846837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stacked flexible disc unit with head plugs
Assignee: Intelligent Memory Systems Inc
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Filing: 1973-06-20
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Granted: 1974-11-05
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Expires: 1993-06-20
Abstract
Abstract A flexible disc memory unit has a series of stacked disc units, each having a head plate above the rotatable magnetic disc and a bottom plate, the plates having central air inlets and causing laminar air flow between the disc and the plates. The bottom plate has air pressure control ports. The head plate has head plugs which stabilize the flexible disc in the region of the magnetic head.
Inventors
- 👤 J Jacques
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:20
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/58; G11B5/60; G11B5/6005; G11B17/00; G11B17/32; G11B25/00; G11B25/04; G11B25/043
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
136 words
In flexible disc magnetic storage apparatus: a base support, a rotatable shaft projecting upwardly from said base, means for rotating said shaft, and flexible disc storage means disposed about said shaft, said storage means including at least one cartridge unit including a printed circuit head board having a transducer head projecting below said head board, a rest plate below said head board, means supporting said head board and said rest plate on said base plate in vertically spaced relation, a flexible magnetic storage disc disposed between said head board and said rest plate, said disc having a hub on said shaft and rotatable therewith, and said head board and said rest plate having air inlet openings adjacent to said hub for admitting air to the spaces between said head board, said rest plate and said disc.
Claim 2
Dependent Claim
136 words
In flexible disc magnetic storage apparatus: a base support, a rotatable shaft projecting upwardly from said base, means for rotating said shaft, and flexible disc storage means disposed about said shaft, said storage means including at least one cartridge unit including a printed circuit head board having a transducer head projecting below said head board, a rest plate below said head board, means supporting said head board and said rest plate on said base plate in vertically spaced relation, a flexible magnetic storage disc disposed between said head board and said rest plate, said disc having a hub on said shaft and rotatable therewith, and said head board and said rest plate having air inlet openings adjacent to said hub for admitting air to the spaces between said head board, said rest plate and said disc.
Claim 3
Dependent Claim
48 words
In flexible disc magnetic storage apparatus as defined in claim 1, said means supporting said head board and said rest plate on said base plate comprising pins projecting upwardly from said base plate, and a grommet unit on each pin interconnecting said head board and rest plate together.
Claim 4
Dependent Claim
69 words
In flexible disc magnetic storage apparatus as defined in claim 1, said means supporting said head board and said rest plate on said base plate comprising pins projecting upwardly from said base plate, and a grommet unit on each pin interconnecting said head board and rest plate together, said grommet units having spacer means extending above said head board and engageable with a grommet unit of a super-jacent cartridge.
Claim 5
Dependent Claim
91 words
In flexible disc magnetic storage apparatus as defined in claim 1, said means supporting said head board and said rest plate on said base plate comprIsing pins projecting upwardly from said base plate, and a grommet unit on each pin interconnecting said head board and rest plate together, said grommet units having spacer means extending above said head board and engageable with a grommet unit of a super-jacent cartridge, said hub having a spacer means extending above the disc and engageable beneath the hub of the disc of said superjacent unit.
Claim 6
Dependent Claim
39 words
In flexible disc magnetic storage apparatus as defined in claim 1, a head plug supporting said transducer head in said head board, said head plug having a crowned end surface extending below said head board about said transducer head.
Claim 7
Dependent Claim
31 words
In flexible disc magnetic storage apparatus as defined in claim 1, said rest plate having air pressure control openings spaced between its inlet port and the outer periphery of said disc.
Claim 8
Dependent Claim
45 words
In flexible disc magnetic storage apparatus as defined in claim 1, said rest plate having air pressure control openings spaced between its inlet port and the outer periphery of said disc all of said openings being aligned in angularly spaced rows radiating from said hub.
Claim 9
Dependent Claim
107 words
For use in flexible disc memory apparatus of the class described: a cartridge comprising a rest plate, a printed circuit head board, grommet units interconnecting said head board and rest plate together in spaced relation at angularly spaced locations, each grommet unit having a central opening for receiving a supporting pin, said head board and said rest plate having aligned openings, a disc hub revolvable in said aligned openings, a flexible magnetic disc carried by said hub between said head board and said rest plate, and a transducer head carried by said head board and extending into the space between said head board and said rest plate.
Claim 10
Dependent Claim
107 words
For use in flexible disc memory apparatus of the class described: a cartridge comprising a rest plate, a printed circuit head board, grommet units interconnecting said head board and rest plate together in spaced relation at angularly spaced locations, each grommet unit having a central opening for receiving a supporting pin, said head board and said rest plate having aligned openings, a disc hub revolvable in said aligned openings, a flexible magnetic disc carried by said hub between said head board and said rest plate, and a transducer head carried by said head board and extending into the space between said head board and said rest plate.
Claim 11
Dependent Claim
20 words
A cartridge as defined in claim 8, wherein each grommet unit has a spacer portion projecting through said head board.
Claim 12
Dependent Claim
35 words
A cartridge as defined in claim 8, wherein each grommet unit has a spacer portion projecting through said head board, said hub also having a spacer portion projecting through the opening in said head board.
Claim 13
Dependent Claim
31 words
A cartridge as defined in claim 8, wherein said rest plate has air openings in spaced relation between the opening in said rest plate and the outer periphery of said disc.
Claim 14
Dependent Claim
39 words
A cartridge as defined in claim 8, wherein said rest plate has air openings in spaced relation between the opening in said rest plate and the outer periphery of said disc in angularly spaced rows radiating from said hub.
Claim 15
Dependent Claim
35 words
A cartridge as defined in claim 8, including a head plug supporting said transducer and having a crowned end surface extending into the space between said head board and said rest plate about said transducer.
Claim 16
Dependent Claim
56 words
A cartridge as defined in claim 8, including a head plug supporting said transducer and having a crowned end surface extending into the space between said head board and said rest plate about said transducer, said head board and said head plug having coengaged portions for precisely positioning said transducer with respect to said head board.
Claim 17
Dependent Claim
65 words
In flexible magnetic disc memory apparatus including a rotatable flexible magnetic disc revolvable relative to a head plate having a transducer, means providing an air inlet, and an air pressure control plate spaced from said head plate, said air pressure control plate having air openings all of said openings being aligned in radially extending rows spaced angularly about the axis of rotation of said disc.
Claim 18
Dependent Claim
65 words
In flexible magnetic disc memory apparatus including a rotatable flexible magnetic disc revolvable relative to a head plate having a transducer, means providing an air inlet, and an air pressure control plate spaced from said head plate, said air pressure control plate having air openings all of said openings being aligned in radially extending rows spaced angularly about the axis of rotation of said disc.
Claim 19
Dependent Claim
54 words
A head board for use in magnetic memory apparatus, comprising: a board having an opening therethrough, a molded plastic head plug disposed in said opening, said plug having a magnetic transducer head therein, said plug having an end surface through which said transducer head is exposed, said end surface projecting slightly from said board.
Claim 20
Dependent Claim
54 words
A head board for use in magnetic memory apparatus, comprising: a board having an opening therethrough, a molded plastic head plug disposed in said opening, said plug having a magnetic transducer head therein, said plug having an end surface through which said transducer head is exposed, said end surface projecting slightly from said board.
Claim 21
Dependent Claim
17 words
A head board as defined in claim 16, wherein said end surface is contoured in an arc.
Claim 22
Dependent Claim
27 words
A head board as defined in claim 16, wherein said plug and said board having confronting stop surfaces estaBlishing the projection of said transducer from said board.
Claim 23
Dependent Claim
36 words
A head board as defined in claim 16, wherein said plug and said board having confronting stop surfaces establishing the projection of said transducer from said board, and said end surface is contoured in an arc.
Claim 24
Dependent Claim
47 words
A head board as defined in claim 16, wherein said plug and said board having confronting stop surfaces establishing the projection of said transducer from said board, the surface of said board engaged by said surface on said plug being machined to establish a precise board thickness.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |