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Patent US3846831A successfully refreshed from Google Patents.
US3846831A
Expired / Lapsed
US
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Sound reproducing apparatus in which the drive means operates in response to a prerecorded control signal
Assignee: EXATRON Corp A CORP OF
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Filing: 1973-03-07
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Granted: 1974-11-05
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Expires: 1993-03-07
Abstract
Abstract Sound reproducing apparatus for providing a continuous program of intelligence recorded on a record medium such as magnetic tape. A control signal is recorded on the tape in addition to the intelligence-carrying signal. The recorded program is reproduced by a device which is maintained in the operative state, provided that the control signal and the intelligence-carrying signal are not interrupted longer than a predetermined time interval. When the control signal and the intelligence-carrying signal are absent longer than this predetermined time interval, the reproducing device is rendered inoperative.
Inventors
- 👤 C Johnson
- 👤 P Richman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:37
CPC Classifications
G; G11; G11B; G11B27/00; G11B27/10; G11B27/19; G11B27/22; G11B15/00; G11B15/02; G11B15/18; G11B15/22; G11B15/44; G11B15/444; G11B15/446; G11B15/448; G11B15/46
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
91 words
Signal reproduction means for reproducing intelligence signals within a pre-selected frequency range in response to a control signal having a major frequency component outside said range, said signals being recorded on a record medium, comprising: first detecting means for detecting said control signal; second detecting means for detecting said intelligence signals; intelligence signal reproducing means for reproducing said intelligence signals on said record medium; and operating means responsive to said control signal for controlling said intelligence signal means to reproduce said intelligence signals only in continuing response to said control signal.
Claim 2
Dependent Claim
91 words
Signal reproduction means for reproducing intelligence signals within a pre-selected frequency range in response to a control signal having a major frequency component outside said range, said signals being recorded on a record medium, comprising: first detecting means for detecting said control signal; second detecting means for detecting said intelligence signals; intelligence signal reproducing means for reproducing said intelligence signals on said record medium; and operating means responsive to said control signal for controlling said intelligence signal means to reproduce said intelligence signals only in continuing response to said control signal.
Claim 3
Dependent Claim
13 words
The reproduction means of claim 1, wherein said record medium is magnetic tape.
Claim 4
Dependent Claim
40 words
The signal reproduction means of claim 1, wherein there is further included, in combination, a prerecorded record medium having recorded thereon intelligence signals within a pre-selected frequency range and a control signal having a major frequency component outside said range.
Claim 5
Dependent Claim
15 words
The signal reproduction means of claim 3, wherein said record medium is a magnetic tape.
Claim 6
Dependent Claim
19 words
The signal reproduction means of claim 2, wherein each said signal is recorded across the width of said tape.
References Cited (Backward Citations)
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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 |