US4114453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Accelerometer sensor
Assignee: Ben Gurion University of the Negev Research and Development Authority Ltd
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Filing: 1977-06-13
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Granted: 1978-09-19
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Expires: 1997-06-13
Abstract
Abstract An accelerometer sensor comprises an electrical resistor body disposed win a housing and including compacted interleavings of insulating sheet material coated with electrically-conductive particles imparting to the body a high electrical resistivity in the axial direction, which resistivity decreases with the degree of compaction of the body in the axial direction; and a mass movable within the housing in response to acceleration and effective to apply pressure to the resistor body in the axial direction to further compact same and thereby to decrease its axial resistivity.
Inventors
- 👤 Benzion Sandler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:35
CPC Classifications
G; G01; G01P; G01P15/00; G01P15/02; G01P15/08; G01P15/12; G01P15/18
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
106 words
An acceleration sensor, comprising: a housing; an electrical resistor body disposed within the housing and including compacted interleavings of insulating sheet material carrying electrically-conductive particles imparting to said body a high electrical resistivity in the axial direction, which resistivity decreases with the further compaction of said body in the axial direction; a mass movable within the housing in response to acceleration and effective to apply pressure to the resistor body in the axial direction to further compact same and thereby to decrease its axial resistivity; and electrical contacts connected to the opposite ends of said resistor body to enable the axial resistivity thereof to be measured.
Claim 2
Dependent Claim
106 words
An acceleration sensor, comprising: a housing; an electrical resistor body disposed within the housing and including compacted interleavings of insulating sheet material carrying electrically-conductive particles imparting to said body a high electrical resistivity in the axial direction, which resistivity decreases with the further compaction of said body in the axial direction; a mass movable within the housing in response to acceleration and effective to apply pressure to the resistor body in the axial direction to further compact same and thereby to decrease its axial resistivity; and electrical contacts connected to the opposite ends of said resistor body to enable the axial resistivity thereof to be measured.
Claim 3
Dependent Claim
23 words
A sensor according to claim 1, wherein said electrically-conductive particles are carried in a coating on one face of the insulating sheet material.
Claim 4
Dependent Claim
19 words
A sensor according to claim 2, wherein said insulating sheet material is paper, and said electrically-conductive particles are carbon.
Claim 5
Dependent Claim
32 words
A sensor according to claim 1, wherein said electrical resistor body includes at least one strip of said insulating sheet material provided with at least one transverse fold to produce said interleavings.
Claim 6
Dependent Claim
32 words
A sensor according to claim 1, wherein said electrical resistor body includes a spiral strip of said insulating sheet material the spirals being closed in the axial direction to form said interleavings.
Claim 7
Dependent Claim
32 words
A sensor according to claim 1, further including a presettable element engageable with the outer end of the electrical resistor body for presetting the compaction thereof between said element and said mass.
Claim 8
Dependent Claim
34 words
A sensor according to claim 1, wherein said housing includes a pair of said electrical resistor bodies aligned along a common axis with the mass disposed between them and contacting their respective inner ends.
Claim 9
Dependent Claim
49 words
A sensor according to claim 1, wherein said housing includes three of said electrical resistor bodies disposed along axes spaced 120° from each other and intersecting at the centre of the housing, said mass being disposed at said centre in contact with the inner ends of the three bodies.
Claim 10
Dependent Claim
66 words
A sensor according to claim 1, wherein said housing includes four of said electrical resistor bodies, there being two bodies aligned with each other along a first axis, and two bodies aligned with each other along a second axis intersecting said first axis at the centre of said housing, said mass being disposed at said centre in contact with the inner ends of all four bodies.
Claim 11
Dependent Claim
33 words
An accelerometer including a sensor according to claim 1 in combination with an electrical circuit for measuring the axial resistivity of said resistor body and for indicating same as a function of acceleration.
References Cited (Backward Citations)
US2564416A
Cited
US2963911A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-18 | 1982-03-20 | 1982-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-18 | 1986-03-20 | 1986-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-18 | 1990-03-20 | 1990-09-19 | $7700.00 | Window Closed / Lapsed |