Patent US3961520A successfully refreshed from Google Patents.
US3961520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for mechanically exercising bourdon tube gauge
Assignee: United States Department of the Navy
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Filing: 1975-05-27
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Granted: 1976-06-08
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Expires: 1995-05-27
Abstract
Abstract Bourdon tubes should be exercised prior to each calibration by causing theube to move repeatedly through its normal coiling and uncoiling arcs amounts sufficient to produce full scale deflection of the gage pointer. The exercising movements conventionally have been accomplished by applying pressure inside the tube. It has been found that these exercising movements can be accomplished with equal reliability and considerably less expense by engaging the tube end with a pivoted lever and by using a control screw for pivoting the lever.
Inventors
- 👤 Tommie R. Modgling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:58
CPC Classifications
G; G01; G01L; G01L7/00; G01L7/02; G01L7/04; G01L7/043; G01L27/00; G01L27/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
205 words
Apparatus for exercising a housed Bourdon tube gage having a coiled tube portion provided with a sealed end adapted upon variations in interior tube pressure to move arcuately in a predetermined path, said gage further being provided with a scale and with linkage means for translating said arcuate movements into scale pointer movements; said apparatus comprising: an elongate pivotal lever arm having inner and outer ends, a tube-engaging platen carried by said arm near its inner end, a base plate pivotally supporting the outer end of said arm, said plate being adapted to be secured firmly on said gage housing in a fixed position with said pivotal arm extending inwardly toward said sealed end of the Bourdon tube, and manually-operable mechanical means carried by the base plate outwardly of said lever arm support for exerting pivotal pressure on said lever arm outer end, said platen being adjustably carried by said lever arm for enabling said platen to be moved into a tube-engaging position and said platen having an inclined engagement surface for permitting the tube to move in an unrestrained natural arc when said lever is pivotedly moved, whereby said tube can be exercised by pivotally moving said tube repeatedly through its full scale arc.
Claim 2
Dependent Claim
205 words
Apparatus for exercising a housed Bourdon tube gage having a coiled tube portion provided with a sealed end adapted upon variations in interior tube pressure to move arcuately in a predetermined path, said gage further being provided with a scale and with linkage means for translating said arcuate movements into scale pointer movements; said apparatus comprising: an elongate pivotal lever arm having inner and outer ends, a tube-engaging platen carried by said arm near its inner end, a base plate pivotally supporting the outer end of said arm, said plate being adapted to be secured firmly on said gage housing in a fixed position with said pivotal arm extending inwardly toward said sealed end of the Bourdon tube, and manually-operable mechanical means carried by the base plate outwardly of said lever arm support for exerting pivotal pressure on said lever arm outer end, said platen being adjustably carried by said lever arm for enabling said platen to be moved into a tube-engaging position and said platen having an inclined engagement surface for permitting the tube to move in an unrestrained natural arc when said lever is pivotedly moved, whereby said tube can be exercised by pivotally moving said tube repeatedly through its full scale arc.
Claim 3
Dependent Claim
28 words
The apparatus of claim 1 wherein said platen is triangular in shape for providing dual inclined surfaces for accommodating upward and downward exercising movements of said Bourdan tube.
Claim 4
Dependent Claim
27 words
The apparatus of claim 2 wherein said manually-operable mechanical means is a control screw, said base plate being provided with a threaded opening for receiving said screw.
Claim 5
Dependent Claim
66 words
The apparatus of claim 3 wherein: said pivotal mounting is provided by a pivot pin and said base plate and said lever arm are slidably-engagable separable parts both provided with registerable openings for receiving said pin, and said lever arm is provided at its outer and with an inwardly-extending notch for slidably receiving and engaging said control screw during said slidable engagement of said separable members.
Claim 6
Dependent Claim
46 words
The apparatus of claim 4 wherein said control screw is formed with an expanded head portion and said notch is formed to closely receive said expanded head whereby said control screw engages said lever arm for permitting said screw to pivot the arm in either direction.
References Cited (Backward Citations)
US3478571A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-08 | 1979-12-08 | 1980-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-08 | 1983-12-08 | 1984-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-08 | 1987-12-08 | 1988-06-08 | $7700.00 | Window Closed / Lapsed |