US3853000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Strain measuring transducer
Assignee: Peak Components Ltd
•
Filing: 1972-02-18
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Granted: 1974-12-10
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Expires: 1992-02-18
Abstract
Abstract A strain measuring transducer adapted to be fitted to a structure liable to strain, comprising two thick end parts, a thin strip joining the ends, a resistance strain gauge mounted on the strip, and spikes on the end parts to dig into the structure. The transducer is mounted in a corrosion and dust proof casing.
Inventors
- 👤 J Barnett
- 👤 G Barlow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:53
CPC Classifications
G; G01; G01M; G01M13/00; G01L; G01L1/00; G01L1/20; G01L1/22; Y; Y10; Y10S; Y10S33/00; Y10S33/13
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
197 words
A strain measuring apparatus comprising: 1. at least one resistance strain gauge; 2. a resilient neck on which said gauge is mounted; 3. a pair of spaced apart rigid blocks integrally connected to said neck, said neck extending between said rigid blocks in a direction transverse to a line joining the mid points of said rigid blocks; 4. a plurality of pins firmly affixed to each block, whereby said rigid blocks can be fastened securely to the surface of a structure the strain in which is to be measured; 5. a case enclosing said resistance strain gauge, said neck, and said pair of rigid blocks, said case having holes therein through which said pins extend; and 6. a moisture-repelling, resilient insulating material filling the remainder of said case not occupied by said resistance strain gauge, said neck, and said pair of rigid blocks, whereby a strain between said rigid blocks causes a bending stress in said neck, and, since any strain between said rigid blocks is very much smaller than the length of said neck, the deflection of said neck is substantially linear and can be measured with great accuracy and sensitivity by said resistance strain gauge.
Claim 2
Dependent Claim
197 words
A strain measuring apparatus comprising: 1. at least one resistance strain gauge; 2. a resilient neck on which said gauge is mounted; 3. a pair of spaced apart rigid blocks integrally connected to said neck, said neck extending between said rigid blocks in a direction transverse to a line joining the mid points of said rigid blocks; 4. a plurality of pins firmly affixed to each block, whereby said rigid blocks can be fastened securely to the surface of a structure the strain in which is to be measured; 5. a case enclosing said resistance strain gauge, said neck, and said pair of rigid blocks, said case having holes therein through which said pins extend; and 6. a moisture-repelling, resilient insulating material filling the remainder of said case not occupied by said resistance strain gauge, said neck, and said pair of rigid blocks, whereby a strain between said rigid blocks causes a bending stress in said neck, and, since any strain between said rigid blocks is very much smaller than the length of said neck, the deflection of said neck is substantially linear and can be measured with great accuracy and sensitivity by said resistance strain gauge.
Claim 3
Dependent Claim
9 words
a resilient neck on which said gauge is mounted;
Claim 4
Dependent Claim
9 words
a resilient neck on which said gauge is mounted;
Claim 5
Dependent Claim
57 words
A strain measuring apparatus as claimed in claim 1 1. wherein said neck is of rectangular cross section and carries a pair of resistance strain gauges located opposite one another so that a strain applied to said rigid blocks acts oppositely on said gauges and 2. further comprising a bridge network to which said gauges are connected.
Claim 6
Dependent Claim
23 words
A strain measuring apparatus as claimed in claim 2 wherein all the resistive components of said bridge network are mounted within said case.
Claim 7
Dependent Claim
34 words
a pair of spaced apart rigid blocks integrally connected to said neck, said neck extending between said rigid blocks in a direction transverse to a line joining the mid points of said rigid blocks;
Claim 8
Dependent Claim
34 words
a pair of spaced apart rigid blocks integrally connected to said neck, said neck extending between said rigid blocks in a direction transverse to a line joining the mid points of said rigid blocks;
Claim 9
Dependent Claim
31 words
a plurality of pins firmly affixed to each block, whereby said rigid blocks can be fastened securely to the surface of a structure the strain in which is to be measured;
Claim 10
Dependent Claim
31 words
a plurality of pins firmly affixed to each block, whereby said rigid blocks can be fastened securely to the surface of a structure the strain in which is to be measured;
Claim 11
Dependent Claim
51 words
A strain measuring apparatus as claimed in claim 1 and further comprising a pair of extensions, one end of each extension being integrally formed with an opposite end of said neck, and the other end of each extension being integrally formed with a different one of said pair of rigid blocks.
Claim 12
Dependent Claim
26 words
a case enclosing said resistance strain gauge, said neck, and said pair of rigid blocks, said case having holes therein through which said pins extend; and
Claim 13
Dependent Claim
26 words
a case enclosing said resistance strain gauge, said neck, and said pair of rigid blocks, said case having holes therein through which said pins extend; and
Claim 14
Dependent Claim
80 words
a moisture-repelling, resilient insulating material filling the remainder of said case not occupied by said resistance strain gauge, said neck, and said pair of rigid blocks, whereby a strain between said rigid blocks causes a bending stress in said neck, and, since any strain between said rigid blocks is very much smaller than the length of said neck, the deflection of said neck is substantially linear and can be measured with great accuracy and sensitivity by said resistance strain gauge.
Claim 15
Dependent Claim
80 words
a moisture-repelling, resilient insulating material filling the remainder of said case not occupied by said resistance strain gauge, said neck, and said pair of rigid blocks, whereby a strain between said rigid blocks causes a bending stress in said neck, and, since any strain between said rigid blocks is very much smaller than the length of said neck, the deflection of said neck is substantially linear and can be measured with great accuracy and sensitivity by said resistance strain gauge.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |