Geometrical instruments – Indicator of direction of force traversing natural media – Structurally installed including relation to feature thereof
Patent
1982-04-05
1983-09-06
Martin, Jr., William D.
Geometrical instruments
Indicator of direction of force traversing natural media
Structurally installed including relation to feature thereof
33370, 33381, 408 16, G01C 928
Patent
active
044021410
ABSTRACT:
A leveling mechanism having bubble levels is removably attachable to a hand-held power drill. In one form, the leveling mechanism includes a drive shaft coupled between the drill and a chuck for rotation therewith. The drive shaft is rotatably mounted to a support, and the support is held stationary relative to the drill housing. The support may include first and second surfaces parallel and perpendicular, respectively, to the axis of rotation of the drive shaft for supporting first and second bubble levels. Alternatively, the support may include a support plate and a level plate hinged thereto for supporting one or more bubble levels; a grooved alignment plate engages the edges of the support plate and level plate for maintaining a predetermined angular relationship therebetween. In another form, the leveling mechanism is removably attached to the front face of the drill housing. A circular projection extends from the front face of the drill housing, and the leveling mechanism extends around the outer periphery of the projection; a collar threadedly engages the inner periphery of the projection for securing the leveling mechanism to the drill.
REFERENCES:
patent: 2551301 (1951-05-01), Terry
patent: 2767483 (1956-10-01), Sauer
patent: 2806296 (1957-09-01), Weichert
patent: 3664754 (1972-05-01), Kelbel
patent: 3864839 (1975-02-01), Wolf
patent: 3884593 (1975-05-01), Christoffer
patent: 4141151 (1979-02-01), Jansky
patent: 4154001 (1979-05-01), Serafin
Martin, Jr. William D.
Sterrenberg John W.
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