US3596116A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezoelectric-fluid electromechanical transducer
Assignee: Hamilton Watch Co
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Filing: 1969-07-23
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Granted: 1971-07-27
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Expires: 1989-07-23
Abstract
Abstract The transducer has a fluid chamber mounting a piezoelectric element at one end and a piston slidably mounted in a reduced diameter portion of the chamber opposite the element. A timebase, including a high frequency oscillator and a frequency divider, applies an electrical signal across the piezoelectric element whereby the element moves to displace the fluid in the chamber thereby driving the piston outwardly against the bias of a spring. The piston is coupled to the gear train of a timepiece. The timed electrical signal is thus converted to an incremental mechanical movement which is amplified by the fluid system to provide timed indexing of the gear train.
Inventors
- 👤 Richard S Walton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:01
CPC Classifications
G; G04; G04B; G04B1/00; G04B1/26; G04C; G04C3/00; G04C3/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
An electromechanical transducer comprising a fluid container, a relatively smaller piston closing off one portion of said container, a relatively larger piston closing off a second portion of said container and adapted to communicate in force transfer relation with said smaller piston through the fluid in said container, an annular piezoelectric bimorph spaced from said larger piston and having its outer edge fixed to a support, means for coupling an electrical signal to said bimorph, and means connecting said larger piston to the center of said bimorph.
Claim 2
Dependent Claim
87 words
An electromechanical transducer comprising a fluid container, a relatively smaller piston closing off one portion of said container, a relatively larger piston closing off a second portion of said container and adapted to communicate in force transfer relation with said smaller piston through the fluid in said container, an annular piezoelectric bimorph spaced from said larger piston and having its outer edge fixed to a support, means for coupling an electrical signal to said bimorph, and means connecting said larger piston to the center of said bimorph.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |