Patent US3889387A successfully refreshed from Google Patents.
US3889387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Directional gyroscope
Assignee: Aerosonic LLC
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Filing: 1971-07-07
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Granted: 1975-06-17
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Expires: 1991-07-07
Abstract
Abstract Apparatus for resetting the indicating dial of a directional gyroscopic-type instrument wherein depression of a reset element effects disengagement of one clutch and engagement of a second clutch in the drive line between the gyroscope and the dial. An actuator member, pivotally connected to a geared shaft and biasly connected to linkage connecting the geared shaft and the reset element, provides a positive over-center relationship of the parts during the reset operation without disturbing the gyroscope position.
Inventors
- 👤 Frederick J Owens
- 👤 Jerry B Bishop
- 👤 David Fidelman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:04
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/02; G01C19/34; G01C19/04; G01C19/32
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
300 words
In a directional gyroscope having a driving gear and a driven gear, a dial shaft secured to the driven gear and carrying a dial hub slidably journaled thereon and having clutch means fixed on the shaft normally engaged with said dial hub to rotate therewith, and a dial secured to the dial hub, dial reset mechanism comprising a clutch gear rotatable on the dial shaft and positioned to be engageable by the dial hub, and means for disengaging the dial hub from the dial shaft and for engaging the dial hub with the clutch gear, said disengaging and engaging means comprising a stub shaft and a dial reset shaft parallel to said dial shaft, an idler gear and a pinion gear on said stub shaft and said reset shaft, respectively, an actuating arm pivotably connected to the stub shaft and having winged portions engageable with said dial hub, a linkage member connected at one end to the stub shaft-actuating arm pivotal connection and at the other end to the dial reset shaft, said linkage member including a lost-motion connection therein, the pinion geaR being connected for rotating the idler gear, and, in turn, the clutch gear and the dial upon contact of the actuating arm winged portions with the dial hub and upon contact of the dial hub with the clutch gear, and a pair of springs connected to the actuating arm winged portions and to the linkage member for moving the end of the linkage member connected to the dial reset shaft in over-center relationship with respect to the arm and stub shaft pivotal connection upon depression of said dial reset shaft to slidably move said dial hub into engagement with said clutch gear for resetting the dial separate from the driving and driven gears and the dial shaft.
Claim 2
Dependent Claim
300 words
In a directional gyroscope having a driving gear and a driven gear, a dial shaft secured to the driven gear and carrying a dial hub slidably journaled thereon and having clutch means fixed on the shaft normally engaged with said dial hub to rotate therewith, and a dial secured to the dial hub, dial reset mechanism comprising a clutch gear rotatable on the dial shaft and positioned to be engageable by the dial hub, and means for disengaging the dial hub from the dial shaft and for engaging the dial hub with the clutch gear, said disengaging and engaging means comprising a stub shaft and a dial reset shaft parallel to said dial shaft, an idler gear and a pinion gear on said stub shaft and said reset shaft, respectively, an actuating arm pivotably connected to the stub shaft and having winged portions engageable with said dial hub, a linkage member connected at one end to the stub shaft-actuating arm pivotal connection and at the other end to the dial reset shaft, said linkage member including a lost-motion connection therein, the pinion geaR being connected for rotating the idler gear, and, in turn, the clutch gear and the dial upon contact of the actuating arm winged portions with the dial hub and upon contact of the dial hub with the clutch gear, and a pair of springs connected to the actuating arm winged portions and to the linkage member for moving the end of the linkage member connected to the dial reset shaft in over-center relationship with respect to the arm and stub shaft pivotal connection upon depression of said dial reset shaft to slidably move said dial hub into engagement with said clutch gear for resetting the dial separate from the driving and driven gears and the dial shaft.
Claim 3
Dependent Claim
240 words
In a directional gyroscope having an outer and an inner gimbal, a rotor carried on the inner gimbal, a driving gear secured to the outer gimbal for rotation therwith, a dial gear on a dial shaft and meshing with the driving gear to be driven thereby in response to swinging of the outer gimbal, a dial normally rotatable by the dial gear, and means for resetting the dial separate from the swinging of the outer gimbal, the combination of clutch means carried on the dial shaft and slidable from a dial and dial shaft connected position to a dial and dial shaft disconnected position, a stub shaft and a reset shaft positioned parallel adjacent the clutch means and the dial shaft, a link pivotally connected to the stub shaft and to the reset shaft, said link including a lost-motion connection therein, and actuating means having winged portions engageable with said clutch means, said actuating means being pivotally connected at one end thereof to the stub-shaft-link pivotal connection and biasly connected to said winged portions at the other end thereof and to said link whereby movement of the reset shaft in one direction positions said winged portions of the actuating means in contact with the clutch means to slide it along the dial shaft thereby disconnecting the dial from the dial gear, said winged portions of the actuating means assuming an over-center relationship with respect to the stub shaft-link pivotal connection.
Claim 4
Dependent Claim
240 words
In a directional gyroscope having an outer and an inner gimbal, a rotor carried on the inner gimbal, a driving gear secured to the outer gimbal for rotation therwith, a dial gear on a dial shaft and meshing with the driving gear to be driven thereby in response to swinging of the outer gimbal, a dial normally rotatable by the dial gear, and means for resetting the dial separate from the swinging of the outer gimbal, the combination of clutch means carried on the dial shaft and slidable from a dial and dial shaft connected position to a dial and dial shaft disconnected position, a stub shaft and a reset shaft positioned parallel adjacent the clutch means and the dial shaft, a link pivotally connected to the stub shaft and to the reset shaft, said link including a lost-motion connection therein, and actuating means having winged portions engageable with said clutch means, said actuating means being pivotally connected at one end thereof to the stub-shaft-link pivotal connection and biasly connected to said winged portions at the other end thereof and to said link whereby movement of the reset shaft in one direction positions said winged portions of the actuating means in contact with the clutch means to slide it along the dial shaft thereby disconnecting the dial from the dial gear, said winged portions of the actuating means assuming an over-center relationship with respect to the stub shaft-link pivotal connection.
References Cited (Backward Citations)
US2704457A
Cited
US2470482A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |