US4257010A
Expired / Lapsed
US
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Method and apparatus for sensing and maintaining oscillations in an oscillating system
Assignee: Rederi Nordstjernan AB
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Filing: 1977-01-19
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Granted: 1981-03-17
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Expires: 1997-01-19
Abstract
Abstract A method and apparatus for delivering energy to an oscillatory system in a signal transmitter to maintain the system in a state of oscillation. A component of the oscillatory system that affects the oscillation frequency is influenced by the magnitude of a measured condition which is to be transmitted by the signal transmitter. The oscillatory state of the system is sensed through a signal path, and energy is delivered to the system through substantially the same signal path, said energy being delivered in the form of pulses at time intervals longer than a whole period of oscillation of the system to maintain the system in a state of oscillation.
Inventors
- 👤 Sven A. Bergman
- 👤 Per J. Ohlsson
- 👤 Karl-Gustav E. Nordqvist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:13
CPC Classifications
G; G08; G08C; G08C19/00; G08C19/12; G01; G01B; G01B17/00; G01B17/04; G01D; G01D5/00; G01D5/12; G01D5/243; G01L; G01L1/00; G01L1/10; H; H03; H03B; H03B5/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
112 words
A method for delivering energy to an oscillatory system in a signal transmitter to maintain said system in a state of oscillation, a component of the oscillatory system that affects the oscillation frequency of the system being influenced by the magnitude of a measured condition which magnitude is to be transmitted by the signal transmitter, said method comprising sensing the oscillatory state of the system through a signal path, and delivering energy to said system through substantially the same signal path, said energy being delivered in the form of pulses at time intervals longer than a whole period of oscillation of said system to maintain said system in a state of oscillation.
Claim 2
Independent Claim
112 words
A method for delivering energy to an oscillatory system in a signal transmitter to maintain said system in a state of oscillation, a component of the oscillatory system that affects the oscillation frequency of the system being influenced by the magnitude of a measured condition which magnitude is to be transmitted by the signal transmitter, said method comprising sensing the oscillatory state of the system through a signal path, and delivering energy to said system through substantially the same signal path, said energy being delivered in the form of pulses at time intervals longer than a whole period of oscillation of said system to maintain said system in a state of oscillation.
Claim 3
Dependent Claim
41 words
A method as claimed in claim 1 wherein said energy pulses are delivered to the oscillatory system during time periods which are shorter than the time elapsing between the end of one energy delivery period and the beginning of the next.
Claim 4
Dependent Claim
31 words
A method as claimed in claim 1 wherein said energy pulses are delivered during time periods which are not longer than a whole period of the oscillation in the oscillatory system.
Claim 5
Dependent Claim
28 words
A method as claimed in claim 1 wherein the duration of each said energy pulse is shorter than a half period of the oscillation in the oscillatory system.
Claim 6
Dependent Claim
117 words
A signal transmitter comprising an oscillatory system, means for affecting the oscillation frequency of said system in response to influence by the magnitude of a measured condition which magnitude is to be transmitted, means for sensing the oscillatory state of the system, and means for delivering energy to said system, said sensing means and said energy delivery means each being connected to said oscillatory system by means of substantially the same signal path, said energy delivery means comprising a pulse generator controlled by a control means to deliver said energy in the form of pulses at time intervals longer than a whole period of oscillation in said system to maintain said system in a state of oscillation.
Claim 7
Dependent Claim
117 words
A signal transmitter comprising an oscillatory system, means for affecting the oscillation frequency of said system in response to influence by the magnitude of a measured condition which magnitude is to be transmitted, means for sensing the oscillatory state of the system, and means for delivering energy to said system, said sensing means and said energy delivery means each being connected to said oscillatory system by means of substantially the same signal path, said energy delivery means comprising a pulse generator controlled by a control means to deliver said energy in the form of pulses at time intervals longer than a whole period of oscillation in said system to maintain said system in a state of oscillation.
Claim 8
Dependent Claim
23 words
A signal transmitter as claimed in claim 5 wherein said pulse generator comprises a capacitor, a voltage unit, a resistance, and a thyristor.
Claim 9
Dependent Claim
22 words
A signal transmitter as claimed in claim 5 wherein said pulse generator comprises an oscillator adapted to deliver the energy in pulses.
Claim 10
Dependent Claim
17 words
A signal transmitter as claimed in claim 5 wherein the oscillatory system comprises a mechanical oscillatory system.
Claim 11
Dependent Claim
17 words
A signal transmitter as claimed in claim 8 wherein said mechanical oscillatory system comprises a taut band.
Claim 12
Dependent Claim
19 words
A signal transmitter as claimed in claim 9 wherein said taut band is curved between fixed end portions thereof.
Claim 13
Dependent Claim
17 words
A signal transmitter as claimed in claim 5 wherein the oscillatory system comprises an electrical oscillatory system.
References Cited (Backward Citations)
US3140462A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-16 | 1984-09-15 | 1985-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-16 | 1988-09-15 | 1989-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-16 | 1992-09-15 | 1993-03-17 | $7700.00 | Window Closed / Lapsed |