Geometrical instruments – Indicator of direction of force traversing natural media – Structurally installed including relation to feature thereof
Patent
1978-02-10
1979-02-27
Phillips, Charles E.
Geometrical instruments
Indicator of direction of force traversing natural media
Structurally installed including relation to feature thereof
33373, G01C 928
Patent
active
041411510
ABSTRACT:
A leveling device for use in combination with a power tool such as a portable electric drill. The leveling device comprises a pair of levels mounted so that one of the levels indicates deviation from the horizontal of a first datum plane and so that the other level indicates deviation from the horizontal of a second datum plane perpendicular to the first datum plane. The leveling device is mounted on or incorporated into the power tool so that one of the levels indicates deviation of the working axis from the horizontal and so that the other level indicates deviation of the working axis from the vertical.
REFERENCES:
patent: 949842 (1910-02-01), Pugh
patent: 989625 (1911-04-01), McKee
patent: 1305935 (1919-06-01), Rieker
patent: 2287863 (1942-06-01), Buckley
patent: 3540122 (1970-11-01), Bogdan
patent: 3864839 (1975-02-01), Wolf
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