US3685162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surveyor sight
Assignee: Individual
•
Filing: 1970-06-19
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Granted: 1972-08-22
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Expires: 1990-06-19
Abstract
Abstract Sighting apparatus, usable in surveying, comprises a base and a first support therefor; a standard to support a rod or target and mounted on the base to extend upright directly above the first support; second and third supports including a pair of elongated legs having adjustable pivotal attachment to the base accommodating relative swinging of the legs through wide, generally horizontally extending arcs; and, level indicator means on the base to indicate when the standard extends vertically.
Inventors
- 👤 Horace H Haun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:02
CPC Classifications
G; G01; G01C; G01C15/00; G01C15/02; G01C15/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
89 words
Surveyor''s sighting apparatus, comprising a. a base and a first support therefor, b. a standard mounted on the base to extend upright, said support defined by a shaft projecting Below the base directly beneath the standard and having vertically adjustable attachment to the base, c. second and third supports including a pair of elongated legs having adjustable pivotal attachment to the base accommodating relative swinging of the legs through wide generally horizontally extending arcs, and d. level indicator means on the base to indicate when the standard extends vertically.
Claim 2
Dependent Claim
89 words
Surveyor''s sighting apparatus, comprising a. a base and a first support therefor, b. a standard mounted on the base to extend upright, said support defined by a shaft projecting Below the base directly beneath the standard and having vertically adjustable attachment to the base, c. second and third supports including a pair of elongated legs having adjustable pivotal attachment to the base accommodating relative swinging of the legs through wide generally horizontally extending arcs, and d. level indicator means on the base to indicate when the standard extends vertically.
Claim 3
Dependent Claim
27 words
The combination of claim 1 wherein said second and third supports include upright elements having vertically adjustable attachment to the legs to project therebelow for ground engagement.
Claim 4
Dependent Claim
14 words
The combination of claim 1 wherein said level indicator means comprises a bubble chamber.
Claim 5
Dependent Claim
11 words
The combination of claim 1 including sighting structure on the standard.
Claim 6
Dependent Claim
14 words
The combination of claim 4 wherein said sighting structure includes a rotary light reflector.
Claim 7
Dependent Claim
25 words
The combination of claim 1 wherein each of the legs has a range of alternate positions within a swing-arc of at least about 75* .
Claim 8
Dependent Claim
67 words
The combination of claim 1 wherein the base comprises upper and lower plates between which the inner ends of the legs extend, and means to adjustably clamp the plates to said inner ends, the upper plate having a vertical bore in which the lower end of the standard projects, and means to releasably clamp the lower end of the standard projecting downwardly relative to the upper plate.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |