Level device for masonry work

Details Level device for masonry work Level device for masonry work

1984-03-16

1986-01-14

Martin, Jr., William D.

Geometrical instruments

Indicator of direction of force traversing natural media

Level or plumb, terrestrial gravitation responsive

73432HA, G01C 504

Patent

active

045638225

ABSTRACT:
A level device is designed to determine different levelling points in building work to automatically set certain parts, such as the suspension systems for false ceilings when this apparatus is fitted with a bolt-driving attachment, comprising a flexible tube connected to a first chamber closed by a first diaphragm offering very low resistance to the liquid contained, the other end of the tube connected to a second chamber closed by a second diaphragm which second diaphragm offers resistance to the liquid contained and compresses the air contained in the corresponding space whereby in turn this air actuates a diaphragm which has needle-type contact switches, on each side, these circuits to an indicator, with a valve used to locate the apparatus at a point which may be at a higher or lower level than that determined by the first diaphragm.

REFERENCES:
patent: 3269023 (1966-08-01), Calkins
patent: 3310880 (1967-03-01), Watts
patent: 3645135 (1972-02-01), Hadley
patent: 4379367 (1983-04-01), Legris
patent: 4384410 (1983-05-01), Melugin et al.

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