Patent US2213155A successfully refreshed from Google Patents.
US3750482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High speed overspeed sensor
Assignee: United States Department of the Army
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Filing: 1971-12-09
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Granted: 1973-08-07
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Expires: 1991-12-09
Abstract
Abstract Simple inexpensive apparatus senses an overspeed condition of a high speed shaft, of a turbine for example. There is no wearing moving part unless the shaft overspeeds. Then one pivoted part or arm moves a very small degree carrying a cup-shaped reflector into the path of a small jet of fluid. This reflector cup reflects the jet stream to a receiver hole and conduit. The conduit leads off to apparatus which shuts off the engine or reduces the power input until the shaft speed is reduced below the overspeed limit.
Inventors
- 👤 H Kast
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 03:13
CPC Classifications
G; G01; G01P; G01P1/00; G01P1/07; G01P1/08; G01P1/10; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/218; Y10T137/2202; Y10T137/2207
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
215 words
A device of the character described comprising a rotatable shaft, means pivotally mounting a supporting member at the axis of rotation of the shaft, said supporting member being pivoted about an axis extending transversely of the shaft axis and having a center of gravity off center with respect to the axis of rotation of the shaft, a jet nozzle arranged to project a stream of fluid under pressure in a path spaced from but substantially parallel with the axis of rotation of the shaft, a regulator conduit having a receiver port disposed in spaced relation adjacent to the jet nozzle out of alignment with the stream of fluid issuing therefrom, and a fluid-jet deflector carried by the pivoted supporting member in a normally inoperative position adjacent to but out of axial alignment with the jet nozzle and the stream of fluid issuing therefrom, said deflector being movable under the influence of centrifugal force applied to the pivoted supporting member by high speed rotation of the shaft to an operative position in alignment with the stream of fluid issuing from said jet nozzle, said deflector being shaped to change the direction of the stream of fluid impinging upon it from the jet nozzle and to redirect the stream into the receiver port of the regulator conduit.
Claim 2
Independent Claim
215 words
A device of the character described comprising a rotatable shaft, means pivotally mounting a supporting member at the axis of rotation of the shaft, said supporting member being pivoted about an axis extending transversely of the shaft axis and having a center of gravity off center with respect to the axis of rotation of the shaft, a jet nozzle arranged to project a stream of fluid under pressure in a path spaced from but substantially parallel with the axis of rotation of the shaft, a regulator conduit having a receiver port disposed in spaced relation adjacent to the jet nozzle out of alignment with the stream of fluid issuing therefrom, and a fluid-jet deflector carried by the pivoted supporting member in a normally inoperative position adjacent to but out of axial alignment with the jet nozzle and the stream of fluid issuing therefrom, said deflector being movable under the influence of centrifugal force applied to the pivoted supporting member by high speed rotation of the shaft to an operative position in alignment with the stream of fluid issuing from said jet nozzle, said deflector being shaped to change the direction of the stream of fluid impinging upon it from the jet nozzle and to redirect the stream into the receiver port of the regulator conduit.
Claim 3
Dependent Claim
16 words
The device of claim 1 having resilient means normally urging the deflector toward its inoperative position.
Claim 4
Dependent Claim
30 words
The device of claim 2 having an adjustable overspeed stop to control the limit of movement of the deflector under centrifugal force applied by high speed rotation of the shaft.
Claim 5
Dependent Claim
15 words
The device of claim 2 having means to vary the tension of the resilient means.
Claim 6
Dependent Claim
24 words
The device of claim 2 in which the rotatable shaft is provided with an axial chamber in which the pivoted supporting member is mounted.
Claim 7
Dependent Claim
28 words
The device of claim 2 in which the fluid-jet deflector is provided with a substantially cup-shaped concavity to receive and redirect the fluid stream from the jet nozzle.
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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |