Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive
Patent
1995-09-20
1998-02-24
Will, Thomas B.
Geometrical instruments
Indicator of direction of force traversing natural media
Level or plumb, terrestrial gravitation responsive
33391, G01C 1510
Patent
active
057201129
ABSTRACT:
A plumb bob includes an asymmetrical device 22 and the bob weight 20. The asymmetrical device 22 includes a plug 20 which can be received in a cavity 24 of the bob weight 20. Appropriate material such as solder or an adhesive is selected for securing the asymmetric device 22 and the bob weight 20 in a manner that causes the center of gravity of the asymmetric device 22 to be aligned with that of the bob weight 20.
REFERENCES:
patent: 584803 (1897-06-01), Wilcox
patent: 1212194 (1917-01-01), Duguid
patent: 1274662 (1918-08-01), Armour
patent: 2523351 (1950-09-01), Armstrong
patent: 3405450 (1968-10-01), Peacock
Adams Daniel T.
Butler Andrew G.
Littleboy John
DWBH Ventures Ltd.
Will Thomas B.
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