US3591734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
A system for selectively controlling multiple operations
Assignee: RECORDED SALES VISUAL PRESENTA
•
Filing: 1968-06-10
•
Granted: 1971-07-06
•
Expires: 1988-06-10
Abstract
Abstract A system for the recording and playback of a tape record in which a plurality of relay switches are operated to control a corresponding plurality of electricaLly operated components. A console is provided having pushbutton switches coupled to operate oscillators which in turn energize the relay switches. The oscillator outputs are also coupled to a tape recorder for making a recording of the sequence and duration of pushbutton switch closures. The output of the tape recorder is coupled back to the oscillators so that when the recorder is played back the relay switches are closed in the same sequence and for the same duration as when the pushbutton switches are manually operated. The contacts of the relays may be used to close circuits to control lighting, slide projection, and other desired functions.
Inventors
- 👤 Don W Abbott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:55
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/30; G11B23/36
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
191 words
A switching control circuit for selectively controlling the operation of a plurality of relays, comprising: a plurality of electromechanical resonator means each having a different resonant frequency, said resonator means each producing a resonant frequency output when a DC potential is applied thereto or when its resonant frequency is applied thereto; a tape recorder with a recording input and a playback output; a plurality of amplifier means, each of which is coupled to one of said resonator means, to said recording input to said playback output and to one said relays; each of said amplifier means amplifying the frequency output of the resonator means to which it is coupled when a DC potential is applied to said resonator means for operation of one of said relays and for input to said recording input; and each of said amplifier means amplifying said playback output to cause sympathetic oscillation by those of said resonator means whose resonant frequency is present in said playback output, the output of each of said sympathetically oscillating resonator means being amplified by The amplifier means coupled thereto, before being applied to the relay coupled to such amplifier means.
Claim 2
Dependent Claim
191 words
A switching control circuit for selectively controlling the operation of a plurality of relays, comprising: a plurality of electromechanical resonator means each having a different resonant frequency, said resonator means each producing a resonant frequency output when a DC potential is applied thereto or when its resonant frequency is applied thereto; a tape recorder with a recording input and a playback output; a plurality of amplifier means, each of which is coupled to one of said resonator means, to said recording input to said playback output and to one said relays; each of said amplifier means amplifying the frequency output of the resonator means to which it is coupled when a DC potential is applied to said resonator means for operation of one of said relays and for input to said recording input; and each of said amplifier means amplifying said playback output to cause sympathetic oscillation by those of said resonator means whose resonant frequency is present in said playback output, the output of each of said sympathetically oscillating resonator means being amplified by The amplifier means coupled thereto, before being applied to the relay coupled to such amplifier means.
Claim 3
Dependent Claim
38 words
A switching control circuit as in claim 1, in which the tape recorder comprises a two-channel stereo tape recorder, said amplifier means being coupled to one channel and the other channel being adapted to receive an audio program.
Claim 4
Dependent Claim
44 words
A switching control circuit as in claim 1, including a plurality of tuned circuit means each coupled between one of said amplifier means and one of said resonator means and adapted to pass a frequency band containing the resonant frequency of said resonator means.
References Cited (Backward Citations)
US2811588A
Cited
US3026769A
Cited
US3227814A
Cited
US3200206A
Cited
US3305645A
Cited
US3480738A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |