US4075624A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic siren structure and method
Assignee: Individual
•
Filing: 1974-05-15
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Granted: 1978-02-21
•
Expires: 1994-05-15
Abstract
Abstract An electronic siren including yelp and wail oscillators, means for mixing the signals from the yelp and wail oscillators, and an amplifier output circuit for broadcasting the mixed yelp and wail signals. The wail oscillator is adapted to operate automatically or may be operated manually by means of a push button or from remote switching means. The wail oscillator may also be switched to operate with a siren sound or a horn sound having a variable pitch. The amplifier output circuit is also utilized as an output circuit for a variable volume microphone or radio input signal thereto. Additional amplifier structure for increasing the output of the electronic siren is also provided in accordance with the invention. In operation, the electronic siren will provide a microphone or radio output, a manually selected automatic siren or horn sound output from the wail oscillator, the output of both the wail and yelp oscillators simultaneously, or the output of the yelp oscillator. The manually selected horn or siren sound output of the wail oscillator may also be initiated manually and under control of a remote switch. Optionally, the yelp oscillator may be remotely operated also.
Inventors
- 👤 Richard M. Sheff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:30
CPC Classifications
G; G08; G08B; G08B3/00; G08B3/10; G10; G10H; G10H1/00; G10H1/02
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
155 words
Electronic siren structure comprising a varying pitch yelp oscillator, means for driving the yelp oscillator to produce a square wave output therefrom, a varying pitch wail oscillator, means for driving the wail oscillator to produce a square wave output therefrom, mixer circuitry electrically connected to the yelp and wail oscillators for receiving and mixing square wave signals from the yelp and wail oscillators and providing a mixer output signal in accordance therewith, switch means connected to the yelp and wail oscillators and the mixer for switching the output signal from the mixer to one of the yelp oscillator signal separately, the signal from the wail oscillator separately, and the signal from the yelp and wail oscillators simultaneously, and output structure electrically connected to the yelp and wail oscillators for receiving the output signal from the mixer, and providing a signal output for warning of the approach of an emergency vehicle carrying the electronic siren structure.
Claim 2
Dependent Claim
155 words
Electronic siren structure comprising a varying pitch yelp oscillator, means for driving the yelp oscillator to produce a square wave output therefrom, a varying pitch wail oscillator, means for driving the wail oscillator to produce a square wave output therefrom, mixer circuitry electrically connected to the yelp and wail oscillators for receiving and mixing square wave signals from the yelp and wail oscillators and providing a mixer output signal in accordance therewith, switch means connected to the yelp and wail oscillators and the mixer for switching the output signal from the mixer to one of the yelp oscillator signal separately, the signal from the wail oscillator separately, and the signal from the yelp and wail oscillators simultaneously, and output structure electrically connected to the yelp and wail oscillators for receiving the output signal from the mixer, and providing a signal output for warning of the approach of an emergency vehicle carrying the electronic siren structure.
Claim 3
Dependent Claim
33 words
Structure as set forth in claim 1 and further including means electrically connected to the wail oscillator for alternatively providing an electronic horn sound and a siren sound output from the wail oscillator.
Claim 4
Dependent Claim
27 words
Structure as set forth in claim 1 and further including switch means operable in conjunction with the wail oscillator for permitting remote operation of the wail oscillator.
Claim 5
Dependent Claim
21 words
Structure as set forth in claim 1 and further including a manual switch for permitting manual operation of the wail oscillator.
Claim 6
Dependent Claim
34 words
Structure as set forth in claim 1 and further including means connected to the output structure for permitting microphone input to the output structure whereby the electric siren operates as a public address system.
Claim 7
Dependent Claim
35 words
Structure as set forth in claim 1 and further including means connected to the output structure for connecting a radio signal into the output structure whereby the electronic siren operates as a radio broadcast system.
Claim 8
Dependent Claim
25 words
Structure as set forth in claim 1 and further including means for adding amplifier structure to the electronic siren for increasing the power output thereof.
Claim 9
Independent Claim
58 words
The method of providing an alerting signal to warn of the proximity of an emergency vehicle or the like composed of producing a varying pitch square wave yelp oscillator signal, producing a varying pitch square wave wail oscillator signal, and selectively broadcasting the yelp oscillator signal, the wail oscillator signal, and the yelp and wail oscillator signals simultaneously.
Claim 10
Independent Claim
58 words
The method of providing an alerting signal to warn of the proximity of an emergency vehicle or the like composed of producing a varying pitch square wave yelp oscillator signal, producing a varying pitch square wave wail oscillator signal, and selectively broadcasting the yelp oscillator signal, the wail oscillator signal, and the yelp and wail oscillator signals simultaneously.
Claim 11
Dependent Claim
33 words
The method as set forth in claim 8 and further including selectively broadcasting at least one of a microphone signal and a radio signal instead of signals from the yelp and wail oscillators.
Claim 12
Dependent Claim
27 words
The method as set forth in claim 8 and further including the step of adding power to the output of the signals broadcast by the siren structure.
Claim 13
Dependent Claim
106 words
Electronic siren structure comprising a varying pitch yelp oscillator, means for driving the yelp oscillator to produce a square wave output therefrom, a varying pitch wail oscillator, means for driving the wail oscillator to produce a square wave output therefrom, mixer circuitry electrically connected to the yelp and wail oscillators for receiving and mixing square wave signals from the yelp and wail oscillators and providing a mixer output signal in accordance therewith, an output structure electrically connected to the mixer for receiving the output from the mixer and providing a signal output for warning of the approach of an emergency vehicle carrying the electronic siren structure.
Claim 14
Dependent Claim
106 words
Electronic siren structure comprising a varying pitch yelp oscillator, means for driving the yelp oscillator to produce a square wave output therefrom, a varying pitch wail oscillator, means for driving the wail oscillator to produce a square wave output therefrom, mixer circuitry electrically connected to the yelp and wail oscillators for receiving and mixing square wave signals from the yelp and wail oscillators and providing a mixer output signal in accordance therewith, an output structure electrically connected to the mixer for receiving the output from the mixer and providing a signal output for warning of the approach of an emergency vehicle carrying the electronic siren structure.
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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) | 1981-02-20 | 1981-08-22 | 1982-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-20 | 1985-08-22 | 1986-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-20 | 1989-08-22 | 1990-02-21 | $7700.00 | Window Closed / Lapsed |