US3733890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for linearly converting a mechanical quantity into a frequency
Assignee: US Philips Corp
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Filing: 1971-05-24
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Granted: 1973-05-22
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Expires: 1991-05-24
Abstract
Abstract The invention relates to an apparatus for linearly converting a mechanical quantity into a frequency, which apparatus comprises a body which is capable of vibrating and is set into vibration at its resonant frequency by a vibration generator, a device for changing the resonant frequency by changing the bending stiffness of the body, and a device for indicating the frequency, the said body being a leaf spring and the quantity to be measured causing bending of this leaf spring in a transverse direction.
Inventors
- 👤 G Landvogt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:42
CPC Classifications
G; G01; G01L; G01L1/00; G01L1/10; G01L1/106
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
87 words
Apparatus for measuring frequency and ascertaining a mechanical quantity that has been linearly converted into said frequency, comprising: A. a bendable element so fixtured so as to act as a vibratory body; B. means to cause said bendable element to vibrate at its resonant frequency; C. means to vary the bending stiffness in a transverse crosssection of said bendable element by exerting thereupon a mechanical quantity, which results in a corresponding variation in said frequency; and D. means to measure said frequency to ascertain said mechanical quantity.
Claim 2
Dependent Claim
87 words
Apparatus for measuring frequency and ascertaining a mechanical quantity that has been linearly converted into said frequency, comprising: A. a bendable element so fixtured so as to act as a vibratory body; B. means to cause said bendable element to vibrate at its resonant frequency; C. means to vary the bending stiffness in a transverse crosssection of said bendable element by exerting thereupon a mechanical quantity, which results in a corresponding variation in said frequency; and D. means to measure said frequency to ascertain said mechanical quantity.
Claim 3
Dependent Claim
17 words
The apparatus of claim 1, wherein the means to vibrate said bendable element is a vibration generator.
Claim 4
Dependent Claim
13 words
The apparatus of claim 1, wherein said bendable element is a leaf spring.
Claim 5
Dependent Claim
13 words
The apparatus of claim 1, further comprising means to damp said bendable element.
Claim 6
Dependent Claim
26 words
The apparatus of claim 1, wherein said bendable element has a plurality of axes and is of varying dimensionality along at least one of said axes.
Claim 7
Dependent Claim
15 words
The apparatus of claim 1, wherein said bendable element is composed of a magnetostrictive material.
Claim 8
Dependent Claim
13 words
The apparatus of claim 1, wherein the bendable element has an initial bend.
Claim 9
Dependent Claim
15 words
The apparatus of claim 1, wherein said bendable element is composed of a piezo-electric material.
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) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |