Patent US3974702A successfully refreshed from Google Patents.
US3974702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluidic inertial gyro
Assignee: United States Department of the Navy
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Filing: 1975-03-24
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Granted: 1976-08-17
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Expires: 1995-03-24
Abstract
Abstract A continuous run, single axis, single degree of freedom gas operated flui inertial gyro comprising a housing, a gimbal assembly supported in the housing on gas thrust and journal bearings, a turbine type spin rotor with axle mounting the rotor in the gimbal assembly, and shaft means forming part of the gimbal assembly and providing passageways to channel input flow to and vent flow from the gas turbine type spin rotor along and parallel to the gimbal axis to minimize drift error. The gyro is also provided with a pneumatic torquer to provide gimbal adjustment and fluidic pickoff to provide analog gas pressure readouts of pounds per square inch convertible to angular deflection in degrees.
Inventors
- 👤 Rolf K. Brodersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:28
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/02; G01C19/04; G01C19/06; G01C19/12; G01C19/28; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1261; Y10T74/1268; Y10T74/1282
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
203 words
A continuous run, single axis, single degree of freedom, gas operated fluidic inertial gyro comprising a. a housing having a cylindrical journal gas bearing section and end thrust gas bearings; b. a gimbal assembly having a gimbal axis; c. a turbine type spin rotor and means rotatably supporting the latter in said gimbal assembly; d. said gimbal assembly including end caps cooperative with said end thrust bearings and a gas bearing sleeve cooperative with said housing journal gas bearing section to form gas seal means supporting said gimbal assembly within said housing; e. said gimbal assemblies including also shaft means formed with passageways to channel input flow to and vent flow from said gas turbine type spin rotor along and/or parallel to said gimbal axis to minimize drift error; f. a pickoff torquer ring fixed to said gimbal assembly within said housing and having vane type pickoffs and torquers; g. said housing having torquer channels and nozzles to provide inputs to opposite sides of said torquer vanes to provide initial coarse gimbal adjustment and fine low level bias final correction; h. said housing having pickoff channels to provide analog gas pressure readouts of pounds per square inch convertible to angular deflection in degrees.
Claim 2
Dependent Claim
203 words
A continuous run, single axis, single degree of freedom, gas operated fluidic inertial gyro comprising a. a housing having a cylindrical journal gas bearing section and end thrust gas bearings; b. a gimbal assembly having a gimbal axis; c. a turbine type spin rotor and means rotatably supporting the latter in said gimbal assembly; d. said gimbal assembly including end caps cooperative with said end thrust bearings and a gas bearing sleeve cooperative with said housing journal gas bearing section to form gas seal means supporting said gimbal assembly within said housing; e. said gimbal assemblies including also shaft means formed with passageways to channel input flow to and vent flow from said gas turbine type spin rotor along and/or parallel to said gimbal axis to minimize drift error; f. a pickoff torquer ring fixed to said gimbal assembly within said housing and having vane type pickoffs and torquers; g. said housing having torquer channels and nozzles to provide inputs to opposite sides of said torquer vanes to provide initial coarse gimbal adjustment and fine low level bias final correction; h. said housing having pickoff channels to provide analog gas pressure readouts of pounds per square inch convertible to angular deflection in degrees.
Claim 3
Dependent Claim
44 words
Apparatus according to claim 1 a. said end thrust gas bearings comprising each a thrust pad, adjustment means and an adjustment plate moveable by adjustment of said adjustment means to obtain accurate right-angle alignment between end plates and thrust gas bearings for gimbal support.
Claim 4
Dependent Claim
59 words
Apparatus according to claim 1 wherein a. said shaft means passageways include for each shaft a control passageway coaxial with said gimbal axis and a flow nozzle positioned to direct turbine gas input to the buckets of said turbine type rotor and including also a plurality of gas exit vents concentrically arranged about said gimbal axis and parallel thereto.
Claim 5
Dependent Claim
35 words
Apparatus according to claim 1 including a. a rotary gas pressure film separated input joint for each shaft means for supplying gas to said rotor while leaving said gimbal rotatably adjustable about said gimbal axis.
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) | 1979-08-17 | 1980-02-16 | 1980-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-17 | 1984-02-16 | 1984-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-17 | 1988-02-16 | 1988-08-17 | $7700.00 | Window Closed / Lapsed |