Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive
Patent
1987-08-17
1988-08-23
Haroian, Harry N.
Geometrical instruments
Indicator of direction of force traversing natural media
Level or plumb, terrestrial gravitation responsive
G01C 924
Patent
active
047650613
ABSTRACT:
For a level having a platform with an opening, a caddy supporting a level vial so that the vial can be replaced. The caddy includes a keeper body and a latch body which mutually support the vial and which are positioned respectively on opposite sides of the opening. Latch and keeper means hold the bodies in tight engagement with the platform and can be released to allow the bodies to be separated for vial replacement.
REFERENCES:
patent: 3738015 (1973-06-01), DeJong
Coleman John D.
Rawlings Eugene
Haroian Harry N.
Olsson Frederick J.
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