Patent US3614488A successfully refreshed from Google Patents.
US3614488A
Expired / Lapsed
US
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Multicomponent force transducer
Assignee: RISTLER INSTRUMENTS AG
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Filing: 1969-07-30
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Granted: 1971-10-19
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Expires: 1989-07-30
Abstract
Abstract A piezotransducer device in which several piezoplates are located between force-transmitting members and are oriented with the force-sensitive axes depending on the type of force to be measured thereby.
Inventors
- 👤 Hans Conrad Sonderegger
- 👤 Gelli Spescha
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:30
CPC Classifications
G; G01; G01L; G01L5/00; G01L5/16; G01L5/167; B; B23; B23Q; B23Q17/00; B23Q17/09; B23Q17/0952; B23Q17/0966; G01L1/00; G01L1/16
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
110 words
A piezomeasuring device with a force-receiving body for measuring a plurality of forces impinging thereon having a plurality of separate transducer units mounted together, each transducer unit comprising: a pair of force-transmitting members disposed about a common axis; and a plurality of piezocrystals disposed between the forcetransmitting members of said pair and being sensitive to forces in a single direction with respect to said axis; wherein the crystals of each separate transducer unit are sensitive to forces in a direction different from the direction of sensitivity of the crystals of the other transducer units, whereby said measuring device provides a compact arrangement sensitive to forces in a plurality of directions.
Claim 2
Dependent Claim
110 words
A piezomeasuring device with a force-receiving body for measuring a plurality of forces impinging thereon having a plurality of separate transducer units mounted together, each transducer unit comprising: a pair of force-transmitting members disposed about a common axis; and a plurality of piezocrystals disposed between the forcetransmitting members of said pair and being sensitive to forces in a single direction with respect to said axis; wherein the crystals of each separate transducer unit are sensitive to forces in a direction different from the direction of sensitivity of the crystals of the other transducer units, whereby said measuring device provides a compact arrangement sensitive to forces in a plurality of directions.
Claim 3
Dependent Claim
73 words
A piezomeasuring device according to claim 1, wherein said Pair of force-transmitting members of each transducer unit are annular plates, between which said crystals are arranged, said crystals being disc-shaped and disposed in a conductive casing contacting a connecting terminal located on the periphery of said unit, whereby charges produced under the effect of forces acting on said crystals may be conducted to said terminal to provide an electrical indication of said forces.
Claim 4
Dependent Claim
33 words
A piezomeasuring device according to claim 2, further including an outer cylindrical jacket surrounding the outer portion of said plates and an inner cylindrical jacket disposed adjacent the inner surface of said plates.
Claim 5
Dependent Claim
25 words
A piezomeasuring device according to claim 3, further including a pair of insulating rings disposed between said casing and said outer and inner jackets, respectively.
Claim 6
Dependent Claim
30 words
A piezomeasuring device according to claim 4, wherein said piezodiscs are held between said pair of force-transmitting plates by a ring-shaped electrode and a ring-shaped insulator disposed between said plates.
Claim 7
Dependent Claim
36 words
A piezomeasuring device according to claim 5, wherein one unit of said plurality of transducer units is sensitive only to axial compressional forces, while another unit is sensitive only to shear forces in a first direction.
Claim 8
Dependent Claim
24 words
A piezomeasuring device according to claim 6, wherein an additional transducer unit in said plurality of transducer units is sensitive only to rotary moments.
Claim 9
Dependent Claim
32 words
A piezomeasuring device according to claim 7, wherein another transducer unit in said plurality of transducer units is sensitive only to shear forces in a second direction different from said first direction.
Claim 10
Dependent Claim
42 words
A piezomeasuring device according to claim 8, wherein said force receiving body is a ring of U-shaped cross section in which each transducer unit is assembled with axial prestress, so that said force-transmitting members are resilient relative to said force receiving body.
Claim 11
Dependent Claim
51 words
A piezomeasuring device according to claim 1, wherein the individual piezocrystals are of approximately circular disclike form and have substantially the same dimensions independently of the crystal cut, and are inserted into retaining ring means operable to hold the sensitivity axes of the individual crystals in a fixed position until assembly.
Claim 12
Dependent Claim
31 words
A piezomeasuring device according to claim 10, wherein the force-transmitting members are constructed as discs with a central opening and are connected to each other under stress by thin-walled tubular members.
Claim 13
Dependent Claim
31 words
A piezomeasuring device according to claim 1, wherein said force-transmitting members are constructed as discs with a central opening and are connected to each other under stress by thin-walled tubular members.
Claim 14
Dependent Claim
44 words
A piezomeasuring device according to claim 1, wherein the force receiving body is a ring of U-shaped cross section in which the measuring units are assembled with axial prestress in such manner that a force-transmitting member is resilient relative to the force receiving body.
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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) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |