US4488145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resonant sounder device for producing multiple warning sounds
Assignee: Canon Inc
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Filing: 1981-12-31
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Granted: 1984-12-11
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Expires: 2001-12-31
Abstract
Abstract The present invention produces at least two sound signals such as warning signals or actuating signals by one sounder having a resonant frequency, wherein one of the sound signals is indicated by the resonant frequency of the sounder to enable a higher intensity sound to be produced.
Inventors
- 👤 Makoto Katsuma
- 👤 Kiyoshi Alyfuku
- 👤 Masaharu Kawamura
- 👤 Masayoshi Kiuchi
- 👤 Hiroyasu Murakami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:06
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/0207; B06B1/0223; B06B1/0269; G; G08; G08B; G08B3/00; G08B3/10
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
149 words
A warning device comprising: (a) a sounder having a resonant frequency and capable, upon being driven at said resonant frequency, of producing a relatively high sound intensity; (b) an oscillator and a frequency dividing counter, a signal from said oscillator being applied to said frequency dividing counter, said frequency dividing counter producing a plurality of output pulse signals of divided frequencies; (c) at least two warning signal forming means for indicating warnings by the sound signals of said sounder; and (d) a circuit for actuating said sounder, said actuating circuit being responsive to the output signals of said frequency dividing counter and said warning signal forming means to indicate warning states by sound signals corresponding to the frequencies from said frequency dividing counter, whereby one of the sound signals for said warning states is made to have a frequency equal or near to the resonant frequency of said sounder.
Claim 2
Dependent Claim
149 words
A warning device comprising: (a) a sounder having a resonant frequency and capable, upon being driven at said resonant frequency, of producing a relatively high sound intensity; (b) an oscillator and a frequency dividing counter, a signal from said oscillator being applied to said frequency dividing counter, said frequency dividing counter producing a plurality of output pulse signals of divided frequencies; (c) at least two warning signal forming means for indicating warnings by the sound signals of said sounder; and (d) a circuit for actuating said sounder, said actuating circuit being responsive to the output signals of said frequency dividing counter and said warning signal forming means to indicate warning states by sound signals corresponding to the frequencies from said frequency dividing counter, whereby one of the sound signals for said warning states is made to have a frequency equal or near to the resonant frequency of said sounder.
Claim 3
Dependent Claim
73 words
A warning device according to claim 1, wherein said warning signal forming means are any two of a 1st signal forming means for informing of actuation of a self-timer in a camera, a 2nd signal forming means for informing of an improper exposure, a 3rd signal forming means for warning of the filming end, and a 4th signal forming means for warning of an abnormal condition of the voltage source in the camera.
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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) | 1987-12-11 | 1988-06-11 | 1988-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-11 | 1992-06-11 | 1992-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-11 | 1996-06-11 | 1996-12-11 | $7700.00 | Window Closed / Lapsed |