G - Physics – 01 – B
Patent
G - Physics
01
B
33/112
G01B 3/00 (2006.01)
Patent
CA 1258968
ABSTRACT OF THE DISCLOSURE The present invention provides a portable distance measuring device having a housing, a thread measuring member mounted to the housing and a spool of filament in the form of a thread or a thin metal wire which is pulled out of the housing and operates the thread measuring member to provide accurately measured distances. The filament is wound for low resistance unwinding from the spool which is itself fixed against rotation to prevent spool inertia breakage of the filament.
532752
Cooper Martin F.
Johnson Douglas S. Q.c.
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