US3926059A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Accelerometer
Assignee: Individual
•
Filing: 1974-04-15
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Granted: 1975-12-16
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Expires: 1994-04-15
Abstract
Abstract An antiskid braking system which includes valve means for controlling the application of operating pressure to the brakes, so as to rapidly release and then more gradually allow application of the brakes when a skid is indicated, the valve means being operated by the output of a fluid amplifier means which, in turn, is operated by signals from a linear accelerometer that moves in the path of the vehicle and an angular accelerometer that rotates with the wheel, each accelerometer including a seismic mass positioned by impinging fluid discharged from an adjacent outlet and relatively movable to vary the restriction of the fluid discharged to produce signals indicating acceleration and deceleration.
Inventors
- 👤 Vernon R Fish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:41
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/72; B60T8/74; G; G01; G01P; G01P15/00; G01P15/02; G01P15/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
219 words
An accelerometer comprising first, second, third and fourth seismic masses, said masses being of equal size, shape and mass, a pair of chambers positioned one on either side of each of said masses, each of said chambers including an outlet opening facing the adjacent seismic masses, said outlet openings being opposed and axially aligned for each of said seismic masses, a source of pressurized fluid for providing fluid streams discharging through said outlet openings, whereby each of said masses is suspended between opposed fluid streams and is movable toward and away from the adjacent outlet openings, said fluid streams for said first and second seismic masses being substantially parallel, said fluid streams for said third and fourth seismic masses being substantially parallel and normal to the direction of said fluid streams for said first and second seismic masses, said masses and chambers being in substantially a square pattern, means for detecting the static pressure in each of said chambers for obtaining signals of pressure increase from relative movement of a seismic mass toward an outlet opening and of pressure decrease from relative movement of a seismic mass away from an outlet opening as a result of angular deceleration of said chambers, and means for adding said signals so as to obtain a composite output signaL proportional to angular acceleration.
Claim 2
Dependent Claim
219 words
An accelerometer comprising first, second, third and fourth seismic masses, said masses being of equal size, shape and mass, a pair of chambers positioned one on either side of each of said masses, each of said chambers including an outlet opening facing the adjacent seismic masses, said outlet openings being opposed and axially aligned for each of said seismic masses, a source of pressurized fluid for providing fluid streams discharging through said outlet openings, whereby each of said masses is suspended between opposed fluid streams and is movable toward and away from the adjacent outlet openings, said fluid streams for said first and second seismic masses being substantially parallel, said fluid streams for said third and fourth seismic masses being substantially parallel and normal to the direction of said fluid streams for said first and second seismic masses, said masses and chambers being in substantially a square pattern, means for detecting the static pressure in each of said chambers for obtaining signals of pressure increase from relative movement of a seismic mass toward an outlet opening and of pressure decrease from relative movement of a seismic mass away from an outlet opening as a result of angular deceleration of said chambers, and means for adding said signals so as to obtain a composite output signaL proportional to angular acceleration.
References Cited (Backward Citations)
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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) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |