US3795780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acceleration sensor with magnetic operated, oscillating reed switch
Assignee: Garrett Corp
•
Filing: 1972-08-11
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Granted: 1974-03-05
•
Expires: 1992-08-11
Abstract
Abstract A magnetized seismic mass is annular in form, disposed around an elongated hollow tubular body which encloses a magnetic switch. A helical coil spring disposed around the body biases the mass toward one end of the body which is flexibly suspended from a support by a flexible cable.
Inventors
- 👤 G Lawrie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:07
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/14; H01H35/147
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
164 words
An acceleration sensor switch comprising: a. a seismic mass provided with a magnetic field; b. a columnar body disposed adjacent said seismic mass for substantially linear translational movement of said mass relative to said body, said mass being freely movable relative to said body substantially without restraint thereby; c. stop means on said body adjacent one end thereof; d. resilient spring means disposed between said seismic mass and said stop means, said spring means biasing said mass away from said stop means toward the other end of said body; e. support means securing the other end of said body against linear translational movement while permitting non-linear translational movement of said body; and f. switch means sensitive to a magnetic field and mounted on said body and adapted to actuation from one switched state to another by the magnetic field of said mass upon movement thereof for a pre-determined distance during said translational movement from said other end of said body toward said stop means.
Claim 2
Dependent Claim
164 words
An acceleration sensor switch comprising: a. a seismic mass provided with a magnetic field; b. a columnar body disposed adjacent said seismic mass for substantially linear translational movement of said mass relative to said body, said mass being freely movable relative to said body substantially without restraint thereby; c. stop means on said body adjacent one end thereof; d. resilient spring means disposed between said seismic mass and said stop means, said spring means biasing said mass away from said stop means toward the other end of said body; e. support means securing the other end of said body against linear translational movement while permitting non-linear translational movement of said body; and f. switch means sensitive to a magnetic field and mounted on said body and adapted to actuation from one switched state to another by the magnetic field of said mass upon movement thereof for a pre-determined distance during said translational movement from said other end of said body toward said stop means.
Claim 3
Dependent Claim
19 words
The switch of claim 1 in which said seismic mass is annular in form and disposed about said body.
Claim 4
Dependent Claim
20 words
The switch of claim 2 in which said body comprises an elongate tubular member with said switch means disposed therewithin.
Claim 5
Dependent Claim
30 words
The switch of claim 3 in which said stop means comprises a flange member outstanding from said body, said resilient spring means comprising a helical spring disposed about said body.
Claim 6
Dependent Claim
14 words
The switch of claim 4 in which said support means comprises flexible cable means.
Claim 7
Dependent Claim
16 words
The switch of claim 5 enclosed in a housing cover and provided with damping fluid therein.
Claim 8
Dependent Claim
20 words
The switch of claim 6 in which one end of said flexible cable means is anchored to said housing cover.
Claim 9
Dependent Claim
16 words
The switch of claim 5 in which said flexible cable means comprises an electrically conductive cable.
Claim 10
Dependent Claim
22 words
The switch of claim 1 in which said switch further comprises: another stop means on said body adjacent the other end thereof.
Claim 11
Dependent Claim
32 words
The switch of claim 9 in which said another stop means comprises: a vibration-dampening collar member outstanding from said body, annular in form and disposed about said other end of said body.
References Cited (Backward Citations)
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Cited
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Cited
US3608472A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |