US3665764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propeller type velocity indicator
Assignee: United States Department of the Navy
•
Filing: 1970-11-16
•
Granted: 1972-05-30
•
Expires: 1990-11-16
Abstract
Abstract A propeller type velocity indicator including a casing; a propeller shaft rotatably mounted through the casing with a portion of the shaft extending within the interior of the casing and a portion extending exterior of the casing; a propeller mounted on the exterior portion of the shaft; the interior portion of the propeller shaft having an irregularity; a needle mounted within the casing so as to engage the shaft and sense the irregularity thereof; and pickup means mounted within the casing and connected to the needle for converting vibrations of the needle into electrical signals.
Inventors
- 👤 Paul C Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:14
CPC Classifications
G; G01; G01P; G01P5/00; G01P5/02; G01P5/06; G01P5/07
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
183 words
A propeller type velocity indicator comprising: a casing; a propeller shaft rotatably mounted through the casing with a portion of the shaft extending within the interior of the casing and a portion of the shaft extending exterior of the casing; a propeller mounted on the exterior portion of the shaft; the interior portion of the propeller shaft having an irregularity; a needle mounted within the casing so as to engage the shaft and sense the irregularity thereof; pick-up means mounted within the casing and connected to the needle for converting vibrations of the needle into electrical signals, means mounted in the casing for adjusting the pressure of the needle on the propeller shaft; and the adjusting means including: the pick-up means being mounted in a housing; one end of the pick-up housing being connected to the interior of the casing; and threaded means extending through a side of the casing for selectively laterally displacing an opposite end of the pick-up housing so that lateral displacement of said opposite end of the pick-up housing changes the pressure of the needle on the propeller shaft.
Claim 2
Dependent Claim
183 words
A propeller type velocity indicator comprising: a casing; a propeller shaft rotatably mounted through the casing with a portion of the shaft extending within the interior of the casing and a portion of the shaft extending exterior of the casing; a propeller mounted on the exterior portion of the shaft; the interior portion of the propeller shaft having an irregularity; a needle mounted within the casing so as to engage the shaft and sense the irregularity thereof; pick-up means mounted within the casing and connected to the needle for converting vibrations of the needle into electrical signals, means mounted in the casing for adjusting the pressure of the needle on the propeller shaft; and the adjusting means including: the pick-up means being mounted in a housing; one end of the pick-up housing being connected to the interior of the casing; and threaded means extending through a side of the casing for selectively laterally displacing an opposite end of the pick-up housing so that lateral displacement of said opposite end of the pick-up housing changes the pressure of the needle on the propeller shaft.
Claim 3
Dependent Claim
41 words
A propeller type velocity indicator as claimed in claim 1 including the connection of said one end of the pick-up housing being a ball and socket joint; and the threaded means being a bolt which is threaded into the pick-up housing.
Claim 4
Dependent Claim
21 words
A propeller type velocity indicator as claimed in claim 2 including: said irregularity on the propeller shaft being a longitudinal score.
Claim 5
Dependent Claim
32 words
A propeller type velocity indicator as claimed in claim 3 including: the propeller shaft having at least three longitudinal scores; and the circumferential spacing between all of the longitudinal scores being unequal.
Claim 6
Dependent Claim
32 words
A propeller type velocity indicator as claimed in claim 4 including: a jewel bearing mounted in the casing; and the interior end of the propeller shaft being mounted in said jewel bearing.
References Cited (Backward Citations)
US2934947A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |