Surveying staffs

Details Surveying staffs Surveying staffs

1979-10-24

1981-06-09

Stephan, Steven L.

Geometrical instruments

Straight-line light ray type

Rod or target

33294, G01C 1502, G01C 1506

Patent

active

042715989

ABSTRACT:
A surveyor's levelling staff which comprises an endless graduated band or strip on a hollow elongated body with a portion of the strip to be viewed extending along a longitudinal face of the body and the remainder of the strip disposed within the body. The strip passes around a spring-loaded tensioning roller and a winding and brake roller inside the body. The tensioning roller maintains a predetermined tension on the strip and the winding and brake roller includes a winding handle to move the strip along the longitudinal face of the body and through the body, and a brake which, in the locked position prevents relative movement of the strip.

REFERENCES:
patent: 1161358 (1915-11-01), Stotler et al.
patent: 2066785 (1937-01-01), Lautermilch
patent: 2909839 (1959-10-01), Miller

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