US3663894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromechanical oscillator for time measurement
Assignee: Omega Louis Brandt and Frere SA
•
Filing: 1970-11-20
•
Granted: 1972-05-16
•
Expires: 1990-11-20
Abstract
Abstract This invention relates to an electromechanical oscillator for time measurement, wherein the oscillation of a mechanical resonator is sustained through a coil coupled with the resonator, the coil being connected in one branch of a feedback bridge circuit connected between the input and output of an amplifier. In order to avoid a compensating inductance for said coil a specific network of resistors and condensers is provided including a compensating resistance for the ohmic component of the coil impedance and a supplemental resistance for compensation of the inductive component of the coil impedance.
Inventors
- 👤 Max Hetzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:32
CPC Classifications
G; G04; G04F; G04F5/00; G04F5/04; G04C; G04C3/00; G04C3/08; G04C3/10; G04C3/108
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
167 words
An electromechanical oscillator for time measurement, comprising a mechanical resonator, an amplifier and an electromechanical transducer having a coil connected into one branch of a Wheatstone bridge circuit, said resonator being thereby coupled to said one branch, and said amplifier being connected between the bridge output terminals and bridge input terminals, two capacities connected in series in such a manner that they are parts of two other branches of said bridge circuit, one branch of the bridge circuit adjacent said branch comprising said coil including substantially a compensating resistance for compensating the influence of the ohmic component of said coil onto the electrical oscillations, and an other branch of the bridge circuit adjacent said branch including said coil comprising a supplemental ohmic resistance series connected with the capacity of that branch for compensation of the influence of the inductive component of the coil impedance onto the electric oscillations, and a source of E.M.F. connected to said bridge, and to said amplifier, for supplying energy for said oscillator.
Claim 2
Dependent Claim
167 words
An electromechanical oscillator for time measurement, comprising a mechanical resonator, an amplifier and an electromechanical transducer having a coil connected into one branch of a Wheatstone bridge circuit, said resonator being thereby coupled to said one branch, and said amplifier being connected between the bridge output terminals and bridge input terminals, two capacities connected in series in such a manner that they are parts of two other branches of said bridge circuit, one branch of the bridge circuit adjacent said branch comprising said coil including substantially a compensating resistance for compensating the influence of the ohmic component of said coil onto the electrical oscillations, and an other branch of the bridge circuit adjacent said branch including said coil comprising a supplemental ohmic resistance series connected with the capacity of that branch for compensation of the influence of the inductive component of the coil impedance onto the electric oscillations, and a source of E.M.F. connected to said bridge, and to said amplifier, for supplying energy for said oscillator.
Claim 3
Dependent Claim
44 words
An oscillator according to claim 1, wherein the value of said supplemental resistance is approximately equal to the inductance of the coil divided by the value of the ohmic resistance of the transducer and the capacity of the bridge branch including said supplemental resistance.
References Cited (Backward Citations)
US3061796A
Cited
US3504301A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |