Distance measuring device

Details Distance measuring device Distance measuring device

1980-02-19

1982-01-05

Haroian, Harry N.

Geometrical instruments

Area integrators

Electrical

G01B 312

Patent

active

043086659

ABSTRACT:
A manual or vehicle propelled rolling distance measuring unit has a folding frame and support stand and is equipped on the handle portion of the frame with an electrically operated digital counter which responds to the rotary movement of wheel-mounted permanent magnets relative to a stationary magnetic switch. A rotational magnet shield is magnetically driven in one direction by a permanent magnet to a switch shielding position to prevent operation of the digital counter when the measuring device rolls in a reverse direction. The device can be used to establish the distance between poles in a cable television system.

REFERENCES:
patent: 2716819 (1955-09-01), Staples
patent: 3732625 (1973-05-01), Vernooy
patent: 4176458 (1979-12-01), Dunn

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