Geometrical instruments – Distance measuring – By flexible tape
Patent
1994-05-16
1996-01-09
Will, Thomas B.
Geometrical instruments
Distance measuring
By flexible tape
33770, G01B 310
Patent
active
054818133
ABSTRACT:
A new and improved tape measure end retention apparatus includes a base assembly and a screw clamp assembly connected to the base assembly. The screw clamp assembly extends over a top side of the base assembly and is adapted to secure a free end of a tape measure to the base assembly. The screw clamp assembly includes a pressure plate which includes a convex-shaped damping surface, and a first concave channel is adapted to be placed in registration with the convex-shaped clamping surface. The screw assembly includes a knurled knob for rotating the screw assembly. A plurality of magnets are located at the bottom side of the base assembly and include a first magnet, a second magnet, and a third magnet each of which extends longitudinally along the base assembly. The magnets are retained in complementary magnet-receiving channels located in the bottom side of the base assembly. The magnet-receiving channels include channel walls each of which includes apertures that are in registration with each other. The first magnet includes a first alignment slot placed in registration with the apertures. The second magnet includes an alignment aperture placed in registration with the apertures. The third magnet includes a second alignment slot placed in registration with the apertures. A keeper pin is inserted through the registered apertures and the alignment slots for retaining the magnets in the base assembly.
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patent: 4827622 (1989-05-01), Makar
patent: 4864734 (1989-09-01), Woodard et al.
patent: 5077907 (1992-01-01), Furr
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