Patent US5044706A successfully refreshed from Google Patents.
Patent US3879702A successfully refreshed from Google Patents.
US3879702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic rodent control
Assignee: SIERRE TECHNOLOGIES Inc
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Filing: 1973-01-15
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Granted: 1975-04-22
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Expires: 1993-01-15
Abstract
Abstract Apparatus for generating and radiating ultrasonic sounds at frequencies known to adversely affect the nervous systems of pests, such as rats, the apparatus comprising a housing for electronic circuitry, a transducer for emitting the sound, and a reflector for concentrating the radiated sound in one direction; said electronic circuitry including a novel Darlington oscillator circuit using a crystal transducer having a feedback electrode and the crystal also establishing in conjunction with an inductive tank circuit the frequency of oscillation, the apparatus also including a visual indicator to show the ''''on'''' and the ''''off'''' condition of the oscillator since the oscillation is outside the audible range of humans.
Inventors
- 👤 Joseph G Mancone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:58
CPC Classifications
A; A01; A01M; A01M29/00; A01M29/16; A01M29/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
233 words
Apparatus for generating and radiating ultrasonic sound waves for the control of pests, comprising: a. a housing and a concave dish-shaped reflector having a central portion fixed to one face of the housing; b. a ring-shaped piezoelectric transducer resiliently mounted in cushioned relationship within the concave reflector on said central portion opposite the housing, the transducer comprising a vibratory crystal element having main electrodes and having a feedback electrode; c. oscillatory tank circuit members mounted in the housing and including an inductance coupled to the main electrodes of the crystal element to form therewith a tuned tank circuit resonant at an ultrasonic frequency; d. transistor oscillator-amplifier means including a power oscillator transistor mounted in heat-sink relationship with the central portion of said reflector means and including transistor electrodes coupled with said tank circuit, and said oscillator amplifier means further including a driver amplifier transistor coupled to drive said power transistor, and the driver transistor including a control electrode coupled to receive a feedback signal from the feedback electrode of the transducer; and e. a timing circuit continuously delivering an output waveform alternating between high and low levels, and means coupling said output waveform to said control electrode of the driver transistor, said feedback signal combining with said output waveform at the control electrode to alternately bias the latter into and out of a bias range in which the oscillator-amplifier means can sustain oscillations.
Claim 2
Dependent Claim
233 words
Apparatus for generating and radiating ultrasonic sound waves for the control of pests, comprising: a. a housing and a concave dish-shaped reflector having a central portion fixed to one face of the housing; b. a ring-shaped piezoelectric transducer resiliently mounted in cushioned relationship within the concave reflector on said central portion opposite the housing, the transducer comprising a vibratory crystal element having main electrodes and having a feedback electrode; c. oscillatory tank circuit members mounted in the housing and including an inductance coupled to the main electrodes of the crystal element to form therewith a tuned tank circuit resonant at an ultrasonic frequency; d. transistor oscillator-amplifier means including a power oscillator transistor mounted in heat-sink relationship with the central portion of said reflector means and including transistor electrodes coupled with said tank circuit, and said oscillator amplifier means further including a driver amplifier transistor coupled to drive said power transistor, and the driver transistor including a control electrode coupled to receive a feedback signal from the feedback electrode of the transducer; and e. a timing circuit continuously delivering an output waveform alternating between high and low levels, and means coupling said output waveform to said control electrode of the driver transistor, said feedback signal combining with said output waveform at the control electrode to alternately bias the latter into and out of a bias range in which the oscillator-amplifier means can sustain oscillations.
Claim 3
Dependent Claim
233 words
Apparatus for generating and radiating ultrasonic sound waves for the control of pests, comprising: a. a housing and a concave dish-shaped reflector having a central portion fixed to one face of the housing; b. a ring-shaped piezoelectric transducer resiliently mounted in cushioned relationship within the concave reflector on said central portion opposite the housing, the transducer comprising a vibratory crystal element having main electrodes and having a feedback electrode; c. oscillatory tank circuit members mounted in the housing and including an inductance coupled to the main electrodes of the crystal element to form therewith a tuned tank circuit resonant at an ultrasonic frequency; d. transistor oscillator-amplifier means including a power oscillator transistor mounted in heat-sink relationship with the central portion of said reflector means and including transistor electrodes coupled with said tank circuit, and said oscillator amplifier means further including a driver amplifier transistor coupled to drive said power transistor, and the driver transistor including a control electrode coupled to receive a feedback signal from the feedback electrode of the transducer; and e. a timing circuit continuously delivering an output waveform alternating between high and low levels, and means coupling said output waveform to said control electrode of the driver transistor, said feedback signal combining with said output waveform at the control electrode to alternately bias the latter into and out of a bias range in which the oscillatoramplifier means can sustain oscillations.
Claim 4
Dependent Claim
233 words
Apparatus for generating and radiating ultrasonic sound waves for the control of pests, comprising: a. a housing and a concave dish-shaped reflector having a central portion fixed to one face of the housing; b. a ring-shaped piezoelectric transducer resiliently mounted in cushioned relationship within the concave reflector on said central portion opposite the housing, the transducer comprising a vibratory crystal element having main electrodes and having a feedback electrode; c. oscillatory tank circuit members mounted in the housing and including an inductance coupled to the main electrodes of the crystal element to form therewith a tuned tank circuit resonant at an ultrasonic frequency; d. transistor oscillator-amplifier means including a power oscillator transistor mounted in heat-sink relationship with the central portion of said reflector means and including transistor electrodes coupled with said tank circuit, and said oscillator amplifier means further including a driver amplifier transistor coupled to drive said power transistor, and the driver transistor including a control electrode coupled to receive a feedback signal from the feedback electrode of the transducer; and e. a timing circuit continuously delivering an output waveform alternating between high and low levels, and means coupling said output waveform to said control electrode of the driver transistor, said feedback signal combining with said output waveform at the control electrode to alternately bias the latter into and out of a bias range in which the oscillatoramplifier means can sustain oscillations.
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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) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |