US3698248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure responsive transducer
Assignee: Bendix Corp
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Filing: 1970-05-15
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Granted: 1972-10-17
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Expires: 1990-05-15
Abstract
Abstract A clamp-on pressure responsive transducer for measuring changes in pressure exerted on vibrating enclosures of regular cross section by detecting changes in cross sectional area of the enclosure which are caused by pressure and distinguishing them from variations in cross sectional geometrical shape of the enclosure which are caused by vibration. A plurality of sensors are positioned around the enclosure and pressure changes cause uniform changes in each sensor while vibration causes different changes in the sensors. These changes are detected and utilized to produce an output indicative of pressure changes independently of vibration of the enclosure.
Inventors
- 👤 Anthony G Vasek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:59
CPC Classifications
G; G01; G01L; G01L9/00; G01L9/0001; G01L9/0008; F; F02; F02M; F02M65/00; F02M65/003; G01L9/0002
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
131 words
A transducer for producing a response proportional to pressure exerted on the periphery of an enclosure, when the enclosure is subject to variations in geometrical shape caused by extraneous vibrations, by measuring changes in the area oF the cross section of the enclosure caused by pressure comprising: a frame; a plurality of means mounted on said frame for individually sensing both changes in the area of the cross section and variations in geometrical shape of the cross section of the enclosure; and means responsive to said plurality of sensing means for distinguishing changes in the cross sectional area of said enclosure occasioned by pressure changes from variations in the geometrical shape of the cross section of said enclosure occasioned by said vibrations to thereby produce a response proportional to said pressure.
Claim 2
Dependent Claim
131 words
A transducer for producing a response proportional to pressure exerted on the periphery of an enclosure, when the enclosure is subject to variations in geometrical shape caused by extraneous vibrations, by measuring changes in the area oF the cross section of the enclosure caused by pressure comprising: a frame; a plurality of means mounted on said frame for individually sensing both changes in the area of the cross section and variations in geometrical shape of the cross section of the enclosure; and means responsive to said plurality of sensing means for distinguishing changes in the cross sectional area of said enclosure occasioned by pressure changes from variations in the geometrical shape of the cross section of said enclosure occasioned by said vibrations to thereby produce a response proportional to said pressure.
Claim 3
Dependent Claim
26 words
The combination according to claim 1 wherein said sensing means contacts the periphery of the enclosure at at least three positions separated by equal polar angles.
Claim 4
Dependent Claim
18 words
The combination according to claim 2 wherein said positions are located substantially within a plane intersecting the enclosure.
Claim 5
Dependent Claim
18 words
The combination according to claim 3 wherein said plane is substantially perpendicular to the periphery of the enclosure.
Claim 6
Dependent Claim
44 words
The combination according to claim 1 wherein said frame includes a plurality of connected arms and said means for sensing include a plurality of strain gages, one of said gages mounted on each of the said arms at corresponding positions on the said arms.
Claim 7
Dependent Claim
38 words
The combination according to claim 1 wherein said sensing means includes at least three screws threadedly attached to said frame such that the said screws contact the periphery of the enclosure at positions separated by equal polar angles.
Claim 8
Dependent Claim
23 words
The combination according to claim 9 wherein said frame is formed from a number of arms equal to the number of said screws.
Claim 9
Dependent Claim
72 words
The combination of claim 1 wherein each of said means for sensing yields a similar output in response to said pressure changes, said similar outputs collectively representing said pressure changes, and said means for sensing individually yield outputs which collectively combine to an essentially zero output in response to said vibrations; said means responsive to receiving said collective outputs and yielding an indication representative of said pressure changes independently of said vibrations.
Claim 10
Dependent Claim
33 words
The combination of claim 8 said means for sensing are symmetrically spaced around the periphery of said enclosure, and are arranged in a plane normal to the axis of symmetry of said enclosure.
Claim 11
Dependent Claim
43 words
The combination of claim 8 wherein there are a preselected number N of said means for sensing, N being defined by N 1+W where: N said preselected number W the highest mode of vibration which said vibration output is to be essentially zero
Claim 12
Dependent Claim
13 words
The combination of claim 10 wherein said means for sensing are strain gages.
Claim 13
Dependent Claim
29 words
The combination of claim 11 wherein said strain gages are equiangularily spaced about said enclosure and lie in a plane perpendicular to the axis of symmetry of said enclosure.
Claim 14
Dependent Claim
89 words
The combination of claim 8 wherein said enclosure is a polygon having S sides, and wherein there are a preselected number N of said means for sensing, N being chosen consistent with the relationships N > or = 1+W and S/N C for W < or = S where: N said preselected number W the highest mode of vibration for which said vibration output is to be eseentially zero S the numbers of sides of said polygon C the largest integer obtainable such that N > or = 1+W.
Claim 15
Dependent Claim
13 words
The combination of claim 13 wherein said means for sensing are strain gages.
Claim 16
Dependent Claim
29 words
The combination of claim 14 wherein said strain gages are equiangularily spaced about said enclosure and lie in a plane perpendicular to the axis of symmetry of said enclosure.
References Cited (Backward Citations)
US3303572A
Cited
US3535937A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |