US3667491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Function generator using fluid amplifiers
Assignee: RTX Corp
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Filing: 1970-05-04
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Granted: 1972-06-06
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Expires: 1990-05-04
Abstract
Abstract The function generator generates a nonlinear open loop schedule summing by a fluid amplifier the outputs of two or more fluid amplifiers that are both responsive to two or more independent variables.
Inventors
- 👤 Thad M Hasbrouck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:38
CPC Classifications
F; F15; F15C; F15C1/00; F15C1/14; F15C1/146; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/212; Y10T137/2125; Y10T137/2142; Y10T137/2147
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
152 words
A fluid amplifier function generator for generating a nonlinear signal as a function of at least two variables wherein the output desired includes a negative and positive nonlinear function relative to any given reference, a first proportional type of fluid amplifier including means including control ports responding to said two variables, a second proportional type of fluid amplifier also including means having control ports responsive to said two variables and having the flow from the power stream biased to a nonoperative output channel, biasing means for overcoming the bias on said second proportional type of fluid amplifier at the junction point between said negative and positive nonlinear function, and a third proportional type of fluid amplifier operatively connected in phase relationship to the operative output channels of said first and second fluid amplifier for summing the outputs thereof for producing a nonlinear signal indicative of a nonlinear function of said two variables.
Claim 2
Dependent Claim
152 words
A fluid amplifier function generator for generating a nonlinear signal as a function of at least two variables wherein the output desired includes a negative and positive nonlinear function relative to any given reference, a first proportional type of fluid amplifier including means including control ports responding to said two variables, a second proportional type of fluid amplifier also including means having control ports responsive to said two variables and having the flow from the power stream biased to a nonoperative output channel, biasing means for overcoming the bias on said second proportional type of fluid amplifier at the junction point between said negative and positive nonlinear function, and a third proportional type of fluid amplifier operatively connected in phase relationship to the operative output channels of said first and second fluid amplifier for summing the outputs thereof for producing a nonlinear signal indicative of a nonlinear function of said two variables.
Claim 3
Dependent Claim
57 words
A fluid amplifier function generator as claimed in claim 1 wherein the output of said first proportional type of fluid amplifier is a pressure signal applied to a control port of said third fluid amplifier and the output of said second fluid amplifier is a pressure signal applied to another control port of said third fluid amplifier.
Claim 4
Dependent Claim
57 words
A fluid amplifier function generator as claimed in claim 2 including a fourth proportional type of fluid amplifier responsive to at least one of said variables and biased by the other of said variables, the outputs of said fourth proportional type of fluid amplifier being pressure signals applied to opposed control ports in said third fluid amplifier.
Claim 5
Dependent Claim
105 words
A fluid amplifier as claimed in claim 3 including means for producing a still further portion of the nonlinear function including fifth and sixth proportional types of fluid amplifiers wherein said fifth proportional type of fluid amplifier has its control ports connected to the output channels of said third fluid amplifier and said sixth proportional type of fluid amplifier has its output channels connected with opposed control ports of said fifth proportional type of fluid amplifier, said fifth fluid amplifier being rendered inoperative by a bias applied to said sixth fluid amplifier, and rendered operative as a function of at least one of said variables.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |