US3680372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rhombic shear plate gage load element
Assignee: Individual
•
Filing: 1970-04-27
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Granted: 1972-08-01
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Expires: 1990-04-27
Abstract
Abstract An improved strain gage load cell or element comprises a rhombic member completely surrounding a shear plate with the plane of the shear plate lying in the plane of the rhombic member. The arms of the rhombic member are integrally formed to the edges of the shear plate so that a force applied to opposite vertices of the rhombic member in the direction of the diagonal between the vertices establishes tension and compression strains in the shear plate. These tension and compression strains may be detected by suitable strain gage means to provide an output signal indicative of the applied forces.
Inventors
- 👤 Alfred Newman Ormond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:57
CPC Classifications
G; G01; G01L; G01L1/00; G01L1/20; G01L1/22; G01L1/2206; G01L1/2218
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
104 words
A load sensing element comprising: a rhombic member; and an imperforate shear plate surrounded by said rhombic member with the arms of said rhombic member in contiguous connected engagement with major portions of the adjacent edges of said plate whereby a load applied to said load sensing element in alignment with opposite vertices of said rhombic member is transmitted through said rhombic member with a major portion of said load being transferred by said arms to said major portions of the edges of the plate in shear to thereby establish tension and compression strains in said shear plate in the directions of said diagonals.
Claim 2
Dependent Claim
104 words
A load sensing element comprising: a rhombic member; and an imperforate shear plate surrounded by said rhombic member with the arms of said rhombic member in contiguous connected engagement with major portions of the adjacent edges of said plate whereby a load applied to said load sensing element in alignment with opposite vertices of said rhombic member is transmitted through said rhombic member with a major portion of said load being transferred by said arms to said major portions of the edges of the plate in shear to thereby establish tension and compression strains in said shear plate in the directions of said diagonals.
Claim 3
Dependent Claim
41 words
A load element according to claim 1, including strain gage means secured to said shear plate with their sensitive axes aligned with the diagonals of said rhombic member whereby an electrical indication of said tension and compresSion strains may be generated.
Claim 4
Dependent Claim
117 words
A load sensing element comprising: a rhombic member; and an imperforate shear plate lying in the plane of said rhombic member and surrounded by said rhombic member with the perimeter of said shear plate in complete physical contiguous engagement with the inner sides of said rhombic member, whereby a load applied to said load sensing element in alignment with opposite vertices of said rhombic member is transmitted through the arms of said rhombic member with a major portion of said load being transferred by said arms to said shear plate along its edges in shear to simultaneously establish tension and compression strains in said shear plate along the directions of the diagonals of said rhombic member respectively.
Claim 5
Dependent Claim
117 words
A load sensing element comprising: a rhombic member; and an imperforate shear plate lying in the plane of said rhombic member and surrounded by said rhombic member with the perimeter of said shear plate in complete physical contiguous engagement with the inner sides of said rhombic member, whereby a load applied to said load sensing element in alignment with opposite vertices of said rhombic member is transmitted through the arms of said rhombic member with a major portion of said load being transferred by said arms to said shear plate along its edges in shear to simultaneously establish tension and compression strains in said shear plate along the directions of the diagonals of said rhombic member respectively.
Claim 6
Dependent Claim
68 words
A load element according to claim 3, in which the thickness of the arms of said rhombic member are at least twice the thickness of said shear plate when viewed in a cross section taken normal to the plane of said rhombic member and shear plate, said cross section effectively defining an I beam structure such that the senSitivity of said load element to bending moments is decreased.
Claim 7
Dependent Claim
17 words
A load element according to claim 4, in which said rhombic member and shear plate are integral.
Claim 8
Dependent Claim
112 words
A rhombic shear plate strain gage load sensing element comprising: an integral block having cut-outs in opposite sides to define a central imperforate shear plate, the side material of said block outlining said cut-outs defining a rhombic member integral with and surrounding said shear plate, said block including end portions in axial alignment with a diagonal to said rhombic member whereby loads applied along the direction of said diagonal to said end portions are transmitted through said rhombic member with a major portion of said loads being transferred to said shear plate to simultaneously established tension and compression strains in said shear plate in the diagonal directions of said rhombic member respectively.
Claim 9
Dependent Claim
112 words
A rhombic shear plate strain gage load sensing element comprising: an integral block having cut-outs in opposite sides to define a central imperforate shear plate, the side material of said block outlining said cut-outs defining a rhombic member integral with and surrounding said shear plate, said block including end portions in axial alignment with a diagonal to said rhombic member whereby loads applied along the direction of said diagonal to said end portions are transmitted through said rhombic member with a major portion of said loads being transferred to said shear plate to simultaneously established tension and compression strains in said shear plate in the diagonal directions of said rhombic member respectively.
Claim 10
Dependent Claim
63 words
The subject matter of claim 6, in which said block includes saw cuts extending inwardly from opposite sides adjacent to said end portions, said saw cuts terminating short of the center of said block thereby defining flexure webs between said end portions and the remaining intermediate portions of said block lying in a plane at 90* to the plane of said shear plate.
Claim 11
Dependent Claim
46 words
The subject matter of claim 7, including central holes in said webs to place opposite saw cuts in open communication with each other to thereby improve the load transfer characteristics of the integral connections of said end portions with said remaining intermediate portions of said block.
Claim 12
Dependent Claim
65 words
The subject matter of claim 6, including first and second strain gage means secured to said shear plate with their sensitive axes in alignment with said diagonals of said rhombic member respectively; and electrical bridge means connected to said strain gage means for providing an output electrical signal constituting a function of the force applied to said end members in the direCtion of said diagonal.
Claim 13
Dependent Claim
71 words
The subject matter of claim 6, in which the depth of each of said cut-outs is at least as great as the thickness of said shear plate when viewed in cross section taken normal to the plane of said shear plate, said cross section effectively defining an I beam structure such that said load element is substantially insensitive to bending moments in any direction normal to the direction of said forces.
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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) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |