Patent US3874087A successfully refreshed from Google Patents.
US3874087A
Expired / Lapsed
US
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Surveying instrument
Assignee: Leica Aarau AG
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Filing: 1973-03-19
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Granted: 1975-04-01
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Expires: 1993-03-19
Abstract
Abstract A surveying instrument combining a theodolite or transit and an electro-optical telemeter in which the transmitter and receiver of the telemeter are arranged in gravity-symmetrical relationship with respect to the horizontal axis of the theodolite.
Inventors
- 👤 Rene Nunlist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:28
CPC Classifications
G; G01; G01C; G01C3/00; G01C3/02; G01C1/00; G01C1/02; G01S; G01S17/00; G01S17/02; G01S17/06; G01S17/08
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
73 words
A surveying instrument comprising in combination supporting means, a theodolite mounted on said supporting means and range finding telemetering means carried by said theodolite in a gravity-symmetrical relationship wherein the center of gravity of said telemetering means lies substantially at the intersection of the horizontal axis and the sighting axis of said theodolite, thereby permitting transiting oF the assembly in the vertical plane of said theodolite with substantially no imbalance in the assembly.
Claim 2
Dependent Claim
73 words
A surveying instrument comprising in combination supporting means, a theodolite mounted on said supporting means and range finding telemetering means carried by said theodolite in a gravity-symmetrical relationship wherein the center of gravity of said telemetering means lies substantially at the intersection of the horizontal axis and the sighting axis of said theodolite, thereby permitting transiting oF the assembly in the vertical plane of said theodolite with substantially no imbalance in the assembly.
Claim 3
Dependent Claim
56 words
A surveying instrument according to claim 1 wherein the telemetering means includes a transmitter being mounted above the telescope of said theodolite and said receiver being mounted above the telescope of said theodolite and the longitudinal median axes of said transmitter and said receiver being located respectively above and below said sighting axis of said theodolite.
Claim 4
Dependent Claim
34 words
A surveying instrument according to claim 2 wherein said transmitter and receiver are fixedly secured within a housing, and means are provided for removably securing said housing to said telescope for conjoint movement therewith.
Claim 5
Dependent Claim
27 words
A surveying instrument according to claim 3 including means for mounting said transmitter and receiver with their median axes parallel to said sighting axis of the theodolite.
Claim 6
Dependent Claim
21 words
A surveying instrument according to claim 1 including an electric supply source for the telemetering means mounted on the supporting means.
Claim 7
Dependent Claim
20 words
A surveying instrument according to claim 5 including a flexible cable connecting the electrical supply source and the telemetering means.
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) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |