US3732883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluidic linear accelerometer
Assignee: Johnson Service Co
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Filing: 1970-01-26
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Granted: 1973-05-15
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Expires: 1990-01-26
Abstract
Abstract This disclosure includes a fluidic linear accelerometer in the form of a looped conduit of substantially lineal configuration having a fluid input supply and terminating in a pair of opposed ends. A summing impact modulator is connected to the conduit ends to provide an amplified fluidic signal. The density of the fluid flowing in one of the two lineal passageways forming the loop is changed with respect to the other. A pressure differential is established which is dependent upon the linear acceleration in the lineal direction and the difference in densities.
Inventors
- 👤 O Munch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:22
CPC Classifications
F; F15; F15C; F15C4/00; F15C1/00; F15C1/005; G; G01; G01P; G01P15/00; G01P15/02; G01P15/03; G01P15/038; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/2164; Y10T137/2169; Y10T137/2174; Y10T137/218; Y10T137/2191; Y10T137/2196
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
110 words
A linear fluidic accelerometer having an output dependent upon the acceleration thereof, comprising a flow passageway means having a pair of generally parallel legs connected to a pair of end output means, said flow passageway means being movably mounted for movement in the same direction as said parallel legs extend, control means establishing a different density of fluid in the first of said parallel legs from the density of fluid in the second of said parallel legs, and a differential fluid signal responsive means connected to said pair of end output means establishing an output related to the acceleration of the flow passageway means in the direction of the legs.
Claim 2
Dependent Claim
110 words
A linear fluidic accelerometer having an output dependent upon the acceleration thereof, comprising a flow passageway means having a pair of generally parallel legs connected to a pair of end output means, said flow passageway means being movably mounted for movement in the same direction as said parallel legs extend, control means establishing a different density of fluid in the first of said parallel legs from the density of fluid in the second of said parallel legs, and a differential fluid signal responsive means connected to said pair of end output means establishing an output related to the acceleration of the flow passageway means in the direction of the legs.
Claim 3
Dependent Claim
34 words
The linear fluidic accelerometer of claim 1, wherein the signal responsive means includes a pure fluid amplifying means connected to the end output means and establishing an output signal indicative of the linear acceleration.
Claim 4
Dependent Claim
26 words
The linear fluidic accelerometer of claim 1, having a fluid supply connected to said passageway means to establish a predetermined fluid flow to the output means.
Claim 5
Dependent Claim
15 words
The linear fluidic accelerometer of claim 1, wherein said control means are heat exchange means.
Claim 6
Dependent Claim
54 words
The linear fluidic accelerometer of claim 1, having a fluid supply means connected to supply fluid at a preselected temperature to said passageway means, and said control means includes a heat exchange means to the opposite sides of the supply means and changing the temperature of the fluid therethrough to correspondingly change the density.
Claim 7
Dependent Claim
24 words
The linear fluidic accelerometer of claim 5, having fluid capacitor means connected to the passageway means on the discharge side of the heat exchangers.
Claim 8
Dependent Claim
46 words
The linear fluidic accelerometer of claim 1, wherein said passageway means defines a rectangle having said parallel legs defining the long side thereof, said rectangle having minimal length sides to enclose a minimal area and thereby reduce the response to angular movement of the passageway means.
Claim 9
Dependent Claim
65 words
The linear fluidic accelerometer of claim 7, having a liquid supply line connected to one leg and having restrictor means in said sides of the passageway means to the opposite sides of the input supply line to change the density of the liquid between said supply line and the end output means and thereby produce a differential fluid signal at said pair of output means.
Claim 10
Dependent Claim
57 words
The linear fluidic accelerometer of claim 1, wherein said flow passageway means includes a pair of immediately adjacent conduits terminating at one end in said output means, and having a fluid supply connected to the other ends of said conduits, and means for establishing a temperature difference in fluid in said conduits relatIve one to the other.
Claim 11
Dependent Claim
33 words
The linear fluidic accelerometer of claim 9, wherein the signal responsive means includes a pure fluid amplifying means connected to said end output means and establishing an output signal indicating the linear acceleration.
Claim 12
Dependent Claim
24 words
The linear fluidic accelerometer of claim 9, wherein said temperature difference establishing means control the density of the fluid in said immediately adjacent conduits.
Claim 13
Dependent Claim
86 words
The linear fluidic accelerometer of claim 1, wherein said passageway means is generally rectangular with elongated side portions defined by said parallel legs extending in the direction of acceleration and connected by relatively short end portions, an input fluid supply means being connected to one side portion and the signal responsive means being connected to the opposite side portion, and control means being connected in the end portions and operative to change the density of the fluid between the input means and the end output means.
Claim 14
Dependent Claim
54 words
The fluidic apparatus of claim 12, wherein said supply is a gas source providing a constant supply of gas at a preselected temperature at said input means, said control means are a heat exchange means through which said gas flows with a substantial difference in density between the entering gas and the emitted gas.
Claim 15
Dependent Claim
51 words
The fluidic apparatus of claim 12, wherein said supply is a liquid source providing a supply of liquid at a preselected temperature at said input means, said control means are heat exchange means through which said liquid flows with a difference in density between the entering liquid and the emitted liquid.
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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) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |