Surveyor's level with constant instrument height and method

Details Surveyor's level with constant instrument height and method Surveyor's level with constant instrument height and method

1986-04-01

1987-09-08

Little, Willis

Geometrical instruments

Straight-line light ray type

Level

33292, G01C 500

Patent

active

046914447

ABSTRACT:
A surveyor's instrument such as a surveyor's level (10) and method is disclosed wherein a constant instrument height may be provided during repeated set ups of a tripod (22) at different locations at a job site. An adjustable elevating device (24) is provided which mounts a surveyor's level (10) in a manner that its vertical position is changed. The elevating device includes an adaptor base cap (30) which adapts to a tripod collar (20) having a hollow sleeve (32). A shaft (28) which carries an adapter collar (26) is slideably received in the sleeve (32) and set in a desired vertical position by set screw (38) or a gear drive (50, 46, 40). The surveyor's level (10) is affixed to an adapter collar (26) by a level base cap (18).

REFERENCES:
patent: 18689 (1857-11-01), Gray
patent: 2571287 (1951-10-01), Peters
patent: 3588249 (1971-06-01), Studebaker

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