US3710336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal-responsive control system
Assignee: Individual
•
Filing: 1969-10-02
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Granted: 1973-01-09
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Expires: 1989-10-02
Abstract
Abstract An actuating system responsive to a predetermined frequency includes a network for preventing actuation by noise, unauthorized, or spurious signals, which network includes a filter which passes frequencies in other than the predetermined frequency. The filter passed signal is demodulated and applies as a disabling signal to the system actuator network. Where the system is a sonic type intruder detector the filter-passed signal is also demodulated by a second rectifier and charges a capacitor whose output is applied to the actuator network and after a predetermined charging interval is sufficient to trigger the network. In a door or function actuating system, the actuator network is disabled by a signal of other than the predetermined frequency for an extended interval following its application.
Inventors
- 👤 J Lerner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:29
CPC Classifications
G; G08; G08B; G08B13/00; G08B13/22; G08C; G08C19/00; G08C19/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
163 words
A signal actuated control system comprising an electric signal responsive actuator network, first means responsive to a first signal including a predetermined first frequency for applying an actuating signal to said actuator network and including a first amplifier and a first amplitude demodulator network having an input coupled to the output of said first amplifier and an output coupled to the input of said actuator network, second means responsive to a second signal of a second frequency different from said predetermined frequency for disabling said actuator network and including a second demodulator network and a pass filter blocking signals of said predetermined frequency coupling the output of said first amplifier to the input of said second demodulator, said actuator circuit being disabled in response to the output of said second demodulator network, a third demodulator network coupled to the output of said filter, and means responsive to the output of said third demodulator network for applying an actuating signal to said actuator network.
Claim 2
Dependent Claim
163 words
A signal actuated control system comprising an electric signal responsive actuator network, first means responsive to a first signal including a predetermined first frequency for applying an actuating signal to said actuator network and including a first amplifier and a first amplitude demodulator network having an input coupled to the output of said first amplifier and an output coupled to the input of said actuator network, second means responsive to a second signal of a second frequency different from said predetermined frequency for disabling said actuator network and including a second demodulator network and a pass filter blocking signals of said predetermined frequency coupling the output of said first amplifier to the input of said second demodulator, said actuator circuit being disabled in response to the output of said second demodulator network, a third demodulator network coupled to the output of said filter, and means responsive to the output of said third demodulator network for applying an actuating signal to said actuator network.
Claim 3
Dependent Claim
38 words
The system of claim 1 wherein said means responsive to the output of said third demodulator network applies an actuating signal to said actuator network upon an input to said third demodulator network exceeding a predetermined minimum duration.
Claim 4
Dependent Claim
46 words
The system of claim 1 wherein said means responsive to the output of said third demodulator network responds to an input to said third demodulator network exceeding a predetermined minimum duration and greater than that required by said second demodulator network for disabling said actuation network.
Claim 5
Dependent Claim
154 words
A signal actuated control system comprising an electric signal responsive actuator network, first means responsive to a first signal including a predetermined first frequency for applying an actuating signal to said actuator network and including a first amplifier and a first amplitude demodulator network having an input coupled to the output of said first amplifier and an output coupled to the input of said actuator network, second means responsive to a second signal of a second frequency different from said predetermined frequency for disabling said actuator network and including a second demodulator network and a pass filter blocking signals of said predetermined frequency coupling the output of said first amplifier to the input of said second demodulator, said actuator circuit being disabled in response to the output of said second demodulator network, and means for disabling said actuator network for a predetermined interval following the discontinuance of a disabling output from said second demodulator.
Claim 6
Dependent Claim
154 words
A signal actuated control system comprising an electric signal responsive actuator network, first means responsive to a first signal including a predetermined first frequency for applying an actuating signal to said actuator network and including a first amplifier and a first amplitude demodulator network having an input coupled to the output of said first amplifier and an output coupled to the input of said actuator network, second means responsive to a second signal of a second frequency different from said predetermined frequency for disabling said actuator network and including a second demodulator network and a pass filter blocking signals of said predetermined frequency coupling the output of said first amplifier to the input of said second demodulator, said actuator circuit being disabled in response to the output of said second demodulator network, and means for disabling said actuator network for a predetermined interval following the discontinuance of a disabling output from said second demodulator.
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) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |