Laser plumb-bob apparatus

Details Laser plumb-bob apparatus Laser plumb-bob apparatus

1990-05-07

1991-05-07

Haroian, Harry N.

Geometrical instruments

Straight-line light ray type

Alignment device

33291, 33227, G01C 1502

Patent

active

050125850

ABSTRACT:
An apparatus is set forth for providing vertical alignment and indication of a fixture positioning within a dwelling relative to a floor plan reference point, wherein the apparatus includes a laser oscillator mounted within a lower first housing coaxially aligned through a second and third upper coaxially aligned housing to focus a laser beam onto the ceiling surface of the associated dwelling. A spherical housing is provided medially of the coaxially aligned first and second housings and includes support members for positioning of the housing upon a support surface, such as a floor, or optionally utilizes ring members and associated tether lines to suspend the organization relative to vertical support surfaces.

REFERENCES:
patent: 2517295 (1950-08-01), Esher
patent: 3505739 (1970-04-01), Abrams
patent: 3588249 (1971-06-01), Studebaker
patent: 3911588 (1975-10-01), Ohneda
patent: 4053239 (1977-10-01), Tolmon

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