US3590168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bidirectional cassette head
Assignee: Ampex Corp
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Filing: 1969-01-29
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Granted: 1971-06-29
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Expires: 1989-01-29
Abstract
Abstract A multichannel magnetic head assembly for a magnetic tape recorder having a narrow width tape, e.g. cassette tape recorder. The head is adapted to incorporate within a single structure provisions to record, play and erase audio signals on and off the tape in both tape directions.
Inventors
- 👤 Beverley R Gooch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:41
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/265; G11B5/10; G11B5/105
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
287 words
A bidirectional magnetic head assembly comprising: first and second pairs of associated record/playback transducers, each transducer having an elongate core segment and an energizing coil mounted thereon and an associated elongate pole segment adapted to be disposed end-to-end with said core segment to form a nonmagnetic transducing gap between one set of adjacent ends; a pair of complementary carriers for supporting said transducers relAtive to a magnetic tape, said core segments and coils of said first pair of transducers and said pole segments of said second pair of transducers being mounted in spaced-apart sideby-side relation in one of said carriers, and said core segments and coils of said second pair of transducers and said pole segments of said first pair of transducers being mounted in spaced-apart side-by-side relation in the other said carrier, said complementary carriers with said segments mounted therein being secured together in a confronting assembled relationship with associated said core and pole segments in end-to-end registration with the sets of adjacent ends forming said transducing gaps at a head-to-tape interface; and a pair of erase transducers mounted in different said carriers and in longitudinally offset relationship to each other, one of said erase transducers having an erase gap disposed in tracking relationship with said first pair of transducers and the other erase transducer having an erase gap disposed in tracking relationship with the second pair of transducers such that for one direction of tape movement one of said erase transducers may operate on the magnetic tracks associated with said first pair of transducers prior to recording and for the other direction of tape movement the other erase transducer may operate on the magnetic tracks associated with the second pair of transducers prior to recording.
Claim 2
Dependent Claim
287 words
A bidirectional magnetic head assembly comprising: first and second pairs of associated record/playback transducers, each transducer having an elongate core segment and an energizing coil mounted thereon and an associated elongate pole segment adapted to be disposed end-to-end with said core segment to form a nonmagnetic transducing gap between one set of adjacent ends; a pair of complementary carriers for supporting said transducers relAtive to a magnetic tape, said core segments and coils of said first pair of transducers and said pole segments of said second pair of transducers being mounted in spaced-apart sideby-side relation in one of said carriers, and said core segments and coils of said second pair of transducers and said pole segments of said first pair of transducers being mounted in spaced-apart side-by-side relation in the other said carrier, said complementary carriers with said segments mounted therein being secured together in a confronting assembled relationship with associated said core and pole segments in end-to-end registration with the sets of adjacent ends forming said transducing gaps at a head-to-tape interface; and a pair of erase transducers mounted in different said carriers and in longitudinally offset relationship to each other, one of said erase transducers having an erase gap disposed in tracking relationship with said first pair of transducers and the other erase transducer having an erase gap disposed in tracking relationship with the second pair of transducers such that for one direction of tape movement one of said erase transducers may operate on the magnetic tracks associated with said first pair of transducers prior to recording and for the other direction of tape movement the other erase transducer may operate on the magnetic tracks associated with the second pair of transducers prior to recording.
Claim 3
Dependent Claim
115 words
The head assembly as defined in claim 1 further defined by said carriers each being formed with notches adapted to receive said core and pole segments of said pairs of transducers, said notches being arranged to support the segments of the first pair of transducers with their elongate axes angulated by different angles ( Theta and Theta '') to one lateral side of said carriers and to support the segments of the second pair of transducers with their elongate axes angulated by different angles ( Theta and Theta '') to the other lateral side of said carriers such that said first and second pairs of transducers converge from opposite lateral sides toward the head-to-tape interface.
Claim 4
Dependent Claim
142 words
The head assembly as defined in claim 1, said pair of erase transducers each having an elongate core segment and an energizing coil mounted thereon and an elongate pole segment arranged end-to-end with an associated core segment to form said erase gap at one set of adjacent ends, the core segments of said erase transducers being disposed proximate the pole segments of the pair of record/reproduce transducers in tracking registration therewith, and a nonmagnetic erase gap spacer disposed in spacing relation between each proximate erase core segment and record/reproduce transducer pole segments to provide an additional erase gap for each erase transducer and to couple flux between each said erase transducer and the pair of record/playback transducers in alignment therewith, each said erase transducer being substantially magnetically insulated from the associated said pair of record/playback transducers except at said erase gap spacers.
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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) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |