US3600612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transducer
Assignee: Pitney Bowes Inc
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Filing: 1970-03-27
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Granted: 1971-08-17
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Expires: 1990-03-27
Abstract
Abstract Transducing of a fluidic signal to an electric signal is accomplished in two steps by causing the fluidic signal to operate a whistle and then directing the resultant acoustical energy against a piezoelectric crystal that in sympathetically vibrating produces a low voltage output signal which can be used to control a suitable amplifying and rectifying electric circuit.
Inventors
- 👤 Basil B Beeken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:47
CPC Classifications
G; G10; G10K; G10K5/00; G01; G01L; G01L9/00; G01L9/0001; G01L9/0008; G01L9/0022
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
162 words
A two-stage fluid to electric transducer: comprising a whistle adapted to receive a pneumatic pressure signal and to generate acoustical waves above a frequency of 18,000 Hertz in response to said signal; conduit means for directing said acoustical waves along a predetermined path; said whistle and conduit means being effectively defined by a block means having a longituDinal passage formed therethrough, said passage having a restricted portion intermediate the ends thereof, said block means also being formed with at least one laterally disposed acoustical wave conducting chamber which communicates at one end thereof with said restricted portion of said passage and at the other end thereof with a divergent chamber; a piezoelectric crystal adapted to sympathetically vibrate in response to said acoustic waves; and mounting means for mounting said piezoelectric crystal adjacent the outer end of said divergent chamber and along said path whereby said pneumatic pressure signal may be converted to acoustical signal which in turn is converted to electrical signal.
Claim 2
Dependent Claim
162 words
A two-stage fluid to electric transducer: comprising a whistle adapted to receive a pneumatic pressure signal and to generate acoustical waves above a frequency of 18,000 Hertz in response to said signal; conduit means for directing said acoustical waves along a predetermined path; said whistle and conduit means being effectively defined by a block means having a longituDinal passage formed therethrough, said passage having a restricted portion intermediate the ends thereof, said block means also being formed with at least one laterally disposed acoustical wave conducting chamber which communicates at one end thereof with said restricted portion of said passage and at the other end thereof with a divergent chamber; a piezoelectric crystal adapted to sympathetically vibrate in response to said acoustic waves; and mounting means for mounting said piezoelectric crystal adjacent the outer end of said divergent chamber and along said path whereby said pneumatic pressure signal may be converted to acoustical signal which in turn is converted to electrical signal.
Claim 3
Dependent Claim
21 words
Apparatus as defined by claim 1 wherein said conduit means includes a divergent chamber disposed between said whistle and said crystal.
Claim 4
Dependent Claim
24 words
Apparatus as defined by claim 2 wherein said whistle is formed with a throat portion and with at least one laterally extending resonating chamber.
References Cited (Backward Citations)
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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) | 1974-08-16 | 1975-02-15 | 1975-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-16 | 1979-02-15 | 1979-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-16 | 1983-02-15 | 1983-08-17 | $7700.00 | Window Closed / Lapsed |