US4079426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tape speed switching multiple track tape recorder
Assignee: Sony Corp
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Filing: 1976-07-01
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Granted: 1978-03-14
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Expires: 1996-07-01
Abstract
Abstract An azimuth angle other than zero can occur if magnetic tape vibrates or moves in the tape width direction during recording or playback mode and this can result in azimuth loss which is a function of the track width angle of misalignment and the wave length of the signals. The wider the tape width the greater the azimuth loss and the lower the tape transport speed the greater the azimuth loss. Thus, the present invention varies the track width and speed so as to obtain optimum reproduction fidelity by combining two or more heads to obtain the desired results.
Inventors
- 👤 Kenkichi Umeda
- 👤 Noriaki Naito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:30
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/02; G11B15/05; G11B15/06; G11B5/00; G11B5/008; G11B5/00813; G11B5/00817; G11B5/00821; G11B5/00826; G11B5/00878; G11B5/02; G11B5/48; G11B5/488; G11B5/4893
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
151 words
A signal recording and/or reproducing apparatus comprising, magnetic signal-recording means including a pair of magnetic heads of the same width for recording at different speed a signal on one or two parallel recording tracks on a magnetic tape with said recording being on one track at slow tape speeds and on two tracks at high tape speeds, magnetic signal-reproducing means for selectively reproducing said recorded signals from either two or one of said two parallel recording tracks including two magnetic heads of the same width with said recorded signals being reproduced from said one and two of the recorded tracks at relatively high tape speeds, and said recorded signals being reproduced from said one of said two tracks at relatively low tape speeds, and speed switching means connected to said reproducing means to switch it to one track at low speeds and to said one and two tracks at high speeds.
Claim 2
Dependent Claim
151 words
A signal recording and/or reproducing apparatus comprising, magnetic signal-recording means including a pair of magnetic heads of the same width for recording at different speed a signal on one or two parallel recording tracks on a magnetic tape with said recording being on one track at slow tape speeds and on two tracks at high tape speeds, magnetic signal-reproducing means for selectively reproducing said recorded signals from either two or one of said two parallel recording tracks including two magnetic heads of the same width with said recorded signals being reproduced from said one and two of the recorded tracks at relatively high tape speeds, and said recorded signals being reproduced from said one of said two tracks at relatively low tape speeds, and speed switching means connected to said reproducing means to switch it to one track at low speeds and to said one and two tracks at high speeds.
Claim 3
Dependent Claim
105 words
A signal recording and/or reproducing apparatus comprising, magnetic signal-recording means including a magnetic head of wide width for recording a signal on two parallel magnetic tracks at high and low tape speeds, magnetic signal reproducing means with a magnetic head of wide width for reproducing at high speeds signals from said two parallel magnetic tracks and a magnetic head of narrow width for reproducing at low speeds signals from one of said tracks, and speed switching means connected to said reproducing means to connect it to said magnetic head of wide width for high speeds and to said head of narrow width for low speeds.
Claim 4
Dependent Claim
105 words
A signal recording and/or reproducing apparatus comprising, magnetic signal-recording means including a magnetic head of wide width for recording a signal on two parallel magnetic tracks at high and low tape speeds, magnetic signal reproducing means with a magnetic head of wide width for reproducing at high speeds signals from said two parallel magnetic tracks and a magnetic head of narrow width for reproducing at low speeds signals from one of said tracks, and speed switching means connected to said reproducing means to connect it to said magnetic head of wide width for high speeds and to said head of narrow width for low speeds.
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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) | 1981-03-13 | 1981-09-12 | 1982-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-13 | 1985-09-12 | 1986-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-13 | 1989-09-12 | 1990-03-14 | $7700.00 | Window Closed / Lapsed |