Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive
Patent
1977-09-22
1978-08-29
Phillips, Charles E.
Geometrical instruments
Indicator of direction of force traversing natural media
Level or plumb, terrestrial gravitation responsive
G01C 928
Patent
active
041093925
ABSTRACT:
A spirit level made of two identical halves is disclosed. The halves are each in the form of a web with marginal flanges and spaced openings. Each opening receives a level vial and a recess is provided in the web at each end of each opening receiving the ends of the level vials.
REFERENCES:
patent: 1159522 (1915-11-01), Miller
patent: 2796673 (1957-06-01), Wells
patent: 2948067 (1960-08-01), Mistretta
Bronson Sonic Power Co., Ultrasonic News, Jul. 1972.
Bronson Sonic Power Co., Ultrasonic News, Feb. 1973.
Lovercheck Charles L.
Mayes Brothers Tool Manufacturing Co.
Phillips Charles E.
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