US5055947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cassette for storing data in a solid state memory in lieu of tape
Assignee: TDK Corp
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Filing: 1989-06-21
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Granted: 1991-10-08
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Expires: 2009-06-21
Abstract
Abstract A cassette type recording unit comprises a cassette casing, an IC memory, a magnetism-electricity transducer capable of magnetically coupling to a recording/reproducing head of the magnetic tape recording apparatus, a recording system and a reproducing system which are arranged between the electro-magnetic transducer and the IC memory, a magnetic detector to detect magnetism in an erasing head of the magnetic tape recording apparatus and a semiconductor switching circuit for switching from the recording system to the reproducing system and vice versa on the basis of a signal from the magnetism detecting element.
Inventors
- 👤 Takateru Satoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:05
CPC Classifications
G; G11; G11C; G11C5/00; G11C5/14; G11C5/141; G11B; G11B23/00; G11B23/02; G11B23/04; G11B23/049; G11C7/00; G11C7/16; H; H04; H04M; H04M1/00; H04M1/64; H04M1/642; G11C2207/00; G11C2207/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
268 words
A cassette for use with a conventional magnetic tape cassette type, magnetic tape recording apparatus having a recording/reproducing head and an erasing head which provides a magnetic flux during a recording operation of the magnetic tape recording apparatus, the cassette comprising: a casing for attachment to the magnetic tape recording apparatus, a solid state memory, within the casing, for storing data, an electro-magnetic transducing element for magnetic coupling to the recording/reproducing head of the magnetic tape recording apparatus to sense data signals generated by the recording/reproducing head during the recording operation and for providing data signals for sensing by the recording/reproducing head during a reproducing operation, a recording system for converting the data signals sensed by the transducing element into data for storage by the memory and a reproducing system for converting data read from the memory into data signals to be provided to the transducing element during the reproducing operation, the recording and reproducing systems respectively being connected between the electro-magnetic transducing element and the solid state memory, magnetism detecting element for detecting the magnetic flux of the erasing head of the magnetic tape recording apparatus, and a switching circuit for switching between the recording system and the reproducing system on the basis of a signal from the magnetism detecting element, wherein the switching circuit connects the recording system between the electro-magnetic transducing element and the memory when the magnetism detecting element detects the magnetic flux of the erasing head and connects the reproducing system between the transducing element and the memory when the magnetism detecting element fails to detect the magnetic flux of the erasing head.
Claim 2
Dependent Claim
268 words
A cassette for use with a conventional magnetic tape cassette type, magnetic tape recording apparatus having a recording/reproducing head and an erasing head which provides a magnetic flux during a recording operation of the magnetic tape recording apparatus, the cassette comprising: a casing for attachment to the magnetic tape recording apparatus, a solid state memory, within the casing, for storing data, an electro-magnetic transducing element for magnetic coupling to the recording/reproducing head of the magnetic tape recording apparatus to sense data signals generated by the recording/reproducing head during the recording operation and for providing data signals for sensing by the recording/reproducing head during a reproducing operation, a recording system for converting the data signals sensed by the transducing element into data for storage by the memory and a reproducing system for converting data read from the memory into data signals to be provided to the transducing element during the reproducing operation, the recording and reproducing systems respectively being connected between the electro-magnetic transducing element and the solid state memory, magnetism detecting element for detecting the magnetic flux of the erasing head of the magnetic tape recording apparatus, and a switching circuit for switching between the recording system and the reproducing system on the basis of a signal from the magnetism detecting element, wherein the switching circuit connects the recording system between the electro-magnetic transducing element and the memory when the magnetism detecting element detects the magnetic flux of the erasing head and connects the reproducing system between the transducing element and the memory when the magnetism detecting element fails to detect the magnetic flux of the erasing head.
Claim 3
Dependent Claim
25 words
The cassette type recording unit according to claim 1, wherein the magnetism detecting element is a magnetic switch, a hole element or a magnetic head.
Claim 4
Dependent Claim
18 words
The cassette type recording unit according to claim 1, wherein the switching circuit is a semiconductor switching circuit.
Claim 5
Dependent Claim
32 words
The cassette type recording unit according to claim 1, wherein the magnetism detecting element is disposed at or near a window for the erasing head so as to face the erasing head.
Claim 6
Dependent Claim
262 words
A cassette for use with a conventional magnetic tape cassette type, magnetic tape recording apparatus for performing one of a recording operation and a reproducing operation, the apparatus having a recording/reproducing head, the cassette comprising: a casing for attachment to the magnetic tape recording apparatus; a solid-state memory, within the casing, for storing data; an electro-magnetic transducing element for magnetic coupling to the recording/reproducing head of the magnetic tape recording apparatus to sense data signals generated by the recording/reproducing head during the recording operation of the apparatus and for providing data signals for sensing by the recording/reproducing head during the reproducing operation of the apparatus; a recording system for converting the data signals sensed by the transducing element into data for storage by the memory and a reproducing system for converting data read from the memory into data signals to be provided to the transducing element during the reproducing operation, the recording and reproducing systems respectively being connected between the electro-magnetic transducing element and the solid state memory; a recording operation detecting element for detecting the recording operation of the magnetic tape recording apparatus; and a switching circuit for switching between the recording system and the reproducing system on the basis of a signal from the recording operation detecting element; wherein the switching circuit connects the recording system between the electro-magnetic transducing element and the memory when the detecting element detects the recording operation of the apparatus and connects the reproducing system between the transducing element and the memory when the detecting element fails to detect the recording operation of the apparatus.
Claim 7
Dependent Claim
262 words
A cassette for use with a conventional magnetic tape cassette type, magnetic tape recording apparatus for performing one of a recording operation and a reproducing operation, the apparatus having a recording/reproducing head, the cassette comprising: a casing for attachment to the magnetic tape recording apparatus; a solid-state memory, within the casing, for storing data; an electro-magnetic transducing element for magnetic coupling to the recording/reproducing head of the magnetic tape recording apparatus to sense data signals generated by the recording/reproducing head during the recording operation of the apparatus and for providing data signals for sensing by the recording/reproducing head during the reproducing operation of the apparatus; a recording system for converting the data signals sensed by the transducing element into data for storage by the memory and a reproducing system for converting data read from the memory into data signals to be provided to the transducing element during the reproducing operation, the recording and reproducing systems respectively being connected between the electro-magnetic transducing element and the solid state memory; a recording operation detecting element for detecting the recording operation of the magnetic tape recording apparatus; and a switching circuit for switching between the recording system and the reproducing system on the basis of a signal from the recording operation detecting element; wherein the switching circuit connects the recording system between the electro-magnetic transducing element and the memory when the detecting element detects the recording operation of the apparatus and connects the reproducing system between the transducing element and the memory when the detecting element fails to detect the recording operation of the apparatus.
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) | 1994-10-07 | 1995-04-08 | 1995-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-07 | 1999-04-08 | 1999-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-07 | 2003-04-08 | 2003-10-08 | $7700.00 | Window Closed / Lapsed |