Laser beam pendular level

Details Laser beam pendular level Laser beam pendular level

1995-02-23

1996-11-12

Fulton, Christopher W.

Geometrical instruments

Straight-line light ray type

Vertical angle

33285, 33286, 33366, G01C 502, G01C 1502

Patent

active

055727964

ABSTRACT:
A laser beam level which comprises a base, a support structure and a laser beam emitting assembly, the emitting assembly including a device for emitting a laser beam in a vertical Z plane and the emitting assembly being mounted in the support structure such that it is pivotable in both the X and Y horizontal planes. The base includes a concave depression having a spherical member mounted therein along with an electrical contact member such that when the base is tilted with respect to a horizontal plane, the spherical member will contact the electrical contact to complete an electric circuit between the base and electrical contact member.

REFERENCES:
patent: 2633028 (1953-03-01), Fillebrown
patent: 2825978 (1958-03-01), Davis
patent: 3462845 (1969-08-01), Matthews
patent: 3911588 (1975-10-01), Ohneda
patent: 4106207 (1978-08-01), Boyett et al.
patent: 4450353 (1984-05-01), Sjolund
patent: 4751782 (1988-06-01), Ammann
patent: 5184406 (1993-02-01), Swierski

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