Patent US3808697A successfully refreshed from Google Patents.
US3808697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inclinometer
Assignee: Individual
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Filing: 1970-01-28
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Granted: 1974-05-07
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Expires: 1990-01-28
Abstract
Abstract An inclinometer moves along a path having an attitude orientater. Its housing has a follower such as wheels engaging the attitude orientater, as in grooves. A pair of linear servoaccelerometers are mounted horizontally and perpendicular to each other in the housing. A detector determines the amount of departure from horizontal of each accelerometer. In some forms there is a third accelerometer of the type indicating the amount of departure from vertical to the longitudinal axis of the inclinometer.
Inventors
- 👤 E Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:05
CPC Classifications
G; G01; G01C; G01C9/00; E; E21; E21B; E21B47/00; E21B47/02; E21B47/022
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
322 words
An inclinomeTer for use along a path having attitude orientation means, including in combination: a housing having follower means engaging said attitude orientation means, a pair of solid-state, direct current, force-balance linear servo-accelerometers, mounted on a normally horizontal plane and perpendicular to each other in said housing, with their axes of sensitivity normally horizontal and perpendicular to each other, each having a mass that tends to be displaced from a force-balanced position by inclination of its axis away from horizontal and having electrical means for restoring said mass to its force-balanced position and means for signaling the amount of electrical current used to achieve force balance at each instant, means for supplying each said servo-acceleromter with direct current, so that departure from horizontal of its axis of sensitivity is overcome by electrical current supplied to said electrical means, and two indicator means outside said housing, each connected electrically to one said means for signaling for indicating the instantaneous amount of the force-balancing electrical current, from which the inclination of each linear servo-accelerometer is determined, a third solid-state, direct current, force-balance servoaccelerometer mounted in said housing with its axis of sensitivity perpendicular to the axes of sensitivity of said pair of linear servo-accelerometers, said third servoaccelerometer having a mass that tends to be displaced from a force-balanced position by inclination of its axis away from vertical and having electrical means for restoring that said mass to its force-balanced position and means for signaling the amount of electrical current used to achieve force balance at each instant, means for supplying said third servo-accelerometer with direct current, so that departure from vertical of its axis of sensitivity is overcome by electrical current supplied to said electrical means, and third indicator means outside said housing and connected to said third accelerometer''s means for signaling for indicating the instantaneous amount of the force-balancing electrical current, from which the inclination from vertical of said third servoaccelerometer is determined.
Claim 2
Dependent Claim
322 words
An inclinomeTer for use along a path having attitude orientation means, including in combination: a housing having follower means engaging said attitude orientation means, a pair of solid-state, direct current, force-balance linear servo-accelerometers, mounted on a normally horizontal plane and perpendicular to each other in said housing, with their axes of sensitivity normally horizontal and perpendicular to each other, each having a mass that tends to be displaced from a force-balanced position by inclination of its axis away from horizontal and having electrical means for restoring said mass to its force-balanced position and means for signaling the amount of electrical current used to achieve force balance at each instant, means for supplying each said servo-acceleromter with direct current, so that departure from horizontal of its axis of sensitivity is overcome by electrical current supplied to said electrical means, and two indicator means outside said housing, each connected electrically to one said means for signaling for indicating the instantaneous amount of the force-balancing electrical current, from which the inclination of each linear servo-accelerometer is determined, a third solid-state, direct current, force-balance servoaccelerometer mounted in said housing with its axis of sensitivity perpendicular to the axes of sensitivity of said pair of linear servo-accelerometers, said third servoaccelerometer having a mass that tends to be displaced from a force-balanced position by inclination of its axis away from vertical and having electrical means for restoring that said mass to its force-balanced position and means for signaling the amount of electrical current used to achieve force balance at each instant, means for supplying said third servo-accelerometer with direct current, so that departure from vertical of its axis of sensitivity is overcome by electrical current supplied to said electrical means, and third indicator means outside said housing and connected to said third accelerometer''s means for signaling for indicating the instantaneous amount of the force-balancing electrical current, from which the inclination from vertical of said third servoaccelerometer is determined.
Claim 3
Dependent Claim
367 words
An inclinometer for use in generally vertical casing having four generally vertical straight grooves, disposed at 90* from each other, including in combination: a generally tubular housing having two sets of rollers, each set having four rollers each, with each roller in one set spaced from and in line with a roller in the other set and engaging one of said grooves, said housing having normally horizontal platform means, a pair of solid-state, direct current, force-balance linear servo-accelerometers, mounted on said platform means and perpendicular to each other in said housing, with their axes of sensitivity normally horizontal and perpendicular to each other, each having a mass that tends to be displaced from a force-balanced position by inclination of its axis away from horizontal and having electrical means for restoring said mass to its force-balanced position and means for signaling the amount of electrical current used to achieve force balance at each instant, mean for supplying each said servo-accelerometer with direct current, so that departure from horizontal of its axis of sensitivity is overcome by electrical current supplied to said electrical means, and two indicator means outside said housing, each connected electrically to one said means for signaling for indicating the instantaneous amount of the force-balancing electrical current, from which the inclination of each linear servo-accelerometer is determined, a third solid-state, direct current, force-balance servo-accelerometer mounted in said housing with its axis of sensitivity perpendicular to the two axes of sensitivity of said pair of linear servo-accelerometers, said third servo-accelerometer having a mass that tends to be displaced from a fOrce-balanced position by inclination of its axis away from vertical and having electrical means for restoring that said mass to its force-balanced position and means for signaling the amount of electrical current used to achieve force balance at each instant, means for supplying said third servo-accelerometer with direct current, so that departure from vertical of its axis of sensitivity is overcome by electrical current supplied to said electrical means, and third indicator means outside said housing and connected to said third accelerometer''s means for signaling for indicating the instantaneous amount of the force-balancing electrical current, from which the inclination from vertical of said third servo-accelerometer is determined.
Claim 4
Dependent Claim
367 words
An inclinometer for use in generally vertical casing having four generally vertical straight grooves, disposed at 90* from each other, including in combination: a generally tubular housing having two sets of rollers, each set having four rollers each, with each roller in one set spaced from and in line with a roller in the other set and engaging one of said grooves, said housing having normally horizontal platform means, a pair of solid-state, direct current, force-balance linear servo-accelerometers, mounted on said platform means and perpendicular to each other in said housing, with their axes of sensitivity normally horizontal and perpendicular to each other, each having a mass that tends to be displaced from a force-balanced position by inclination of its axis away from horizontal and having electrical means for restoring said mass to its force-balanced position and means for signaling the amount of electrical current used to achieve force balance at each instant, mean for supplying each said servo-accelerometer with direct current, so that departure from horizontal of its axis of sensitivity is overcome by electrical current supplied to said electrical means, and two indicator means outside said housing, each connected electrically to one said means for signaling for indicating the instantaneous amount of the force-balancing electrical current, from which the inclination of each linear servo-accelerometer is determined, a third solid-state, direct current, force-balance servo-accelerometer mounted in said housing with its axis of sensitivity perpendicular to the two axes of sensitivity of said pair of linear servo-accelerometers, said third servo-accelerometer having a mass that tends to be displaced from a fOrce-balanced position by inclination of its axis away from vertical and having electrical means for restoring that said mass to its force-balanced position and means for signaling the amount of electrical current used to achieve force balance at each instant, means for supplying said third servo-accelerometer with direct current, so that departure from vertical of its axis of sensitivity is overcome by electrical current supplied to said electrical means, and third indicator means outside said housing and connected to said third accelerometer''s means for signaling for indicating the instantaneous amount of the force-balancing electrical current, from which the inclination from vertical of said third servo-accelerometer is determined.
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) | 1977-05-06 | 1977-11-05 | 1978-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-06 | 1981-11-05 | 1982-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-06 | 1985-11-05 | 1986-05-07 | $7700.00 | Window Closed / Lapsed |