Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive
Patent
1998-03-18
2000-03-28
Bennett, G. Bradley
Geometrical instruments
Indicator of direction of force traversing natural media
Level or plumb, terrestrial gravitation responsive
33381, G01C 926
Patent
active
06041510&
ABSTRACT:
This invention relates to an extendable level which, by means of two slidable extension members on a central body, can more than double its collapsible length. The invention comprises a device which can lock the level in any length from fully collapsed to fully extended. An attachment is provided which can convert the invented level into a large carpenter's square. Further, the extension level, with a scale on its top edge, can measure inside lengths between opposing wall surfaces.
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Bennett G. Bradley
Caplan Julian
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