US3324408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic siren including a shock excited resonant circuit
Assignee: Motorola Solutions Inc
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Filing: 1965-11-23
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Granted: 1967-06-06
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Expires: 1985-11-23
Abstract
No abstract record available.
Inventors
- 👤 Ronald H Chapman
- 👤 Charles W Stephens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:50
CPC Classifications
H; H03; H03B; H03B5/00; H03B5/20; H03B5/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
AN ELECTRONIC SIREN INCLUDING IN COMBINATION: (A) OSCILLATOR MEANS HAVING INPUT, OUTPUT AND CONTROL ELECTRODES, SAID OSCILLATOR MEANS BEING RESPONSIVE TO A VARIATION IN SIGNAL LEVEL AT SAID CONTROL ELECTRODE FOR PRODUCING INTERMITTENT PULSES AT SAID OUTPUT ELECTRODE HAVING A PULSE RECURRENCE FREQUCY PROPORTIONAL TO THE SIGNAL LEVEL AT SAID CONTROL ELECTRODE, (B) CONTROL MEANS FOR APPLYING A SLOWLY VARYING SIGNAL VOLTAGE TO SAID CONTROL ELECTRODE FOR VARYING THE PULSE RECURRENCE FREQUENCY OF SAID INTERMITTENT PULSES AT SAID OUTPUT ELECTRODE, (C) A PARALLEL CONNECTED INDUCTANCE-CAPACITANCE RINGING CIRCUIT, AND (D) OUTPUT CIRCUIT MEANS COUPLED TO SAID OUTPUT ELECTRODE FOR APPLYING SAID INTERMITTENT PULSES TO SAID RINGING CIRCUIT TO SHOCK EXCITE SAID RINGING CIRCUIT AND PRODUCE A DAMPED SINUSOIDAL WAVEFORM AT THE OUTPUT OF SAID RINGING CIRCUIT, HAVING A POWER OUTPUT AND FREQUENCY PROPORTIONAL TO THE PULSE RECURRENCE FREQUENCY OF SAID OSCILLATOR MEANS.
Claim 2
Dependent Claim
141 words
AN ELECTRONIC SIREN INCLUDING IN COMBINATION: (A) OSCILLATOR MEANS HAVING INPUT, OUTPUT AND CONTROL ELECTRODES, SAID OSCILLATOR MEANS BEING RESPONSIVE TO A VARIATION IN SIGNAL LEVEL AT SAID CONTROL ELECTRODE FOR PRODUCING INTERMITTENT PULSES AT SAID OUTPUT ELECTRODE HAVING A PULSE RECURRENCE FREQUCY PROPORTIONAL TO THE SIGNAL LEVEL AT SAID CONTROL ELECTRODE, (B) CONTROL MEANS FOR APPLYING A SLOWLY VARYING SIGNAL VOLTAGE TO SAID CONTROL ELECTRODE FOR VARYING THE PULSE RECURRENCE FREQUENCY OF SAID INTERMITTENT PULSES AT SAID OUTPUT ELECTRODE, (C) A PARALLEL CONNECTED INDUCTANCE-CAPACITANCE RINGING CIRCUIT, AND (D) OUTPUT CIRCUIT MEANS COUPLED TO SAID OUTPUT ELECTRODE FOR APPLYING SAID INTERMITTENT PULSES TO SAID RINGING CIRCUIT TO SHOCK EXCITE SAID RINGING CIRCUIT AND PRODUCE A DAMPED SINUSOIDAL WAVEFORM AT THE OUTPUT OF SAID RINGING CIRCUIT, HAVING A POWER OUTPUT AND FREQUENCY PROPORTIONAL TO THE PULSE RECURRENCE FREQUENCY OF SAID OSCILLATOR MEANS.
References Cited (Backward Citations)
US3051944A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-05 | 1970-12-05 | 1971-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-05 | 1974-12-05 | 1975-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-05 | 1978-12-05 | 1979-06-06 | $7700.00 | Window Closed / Lapsed |