Tool for projecting a visually perceptible plumb line from a...

Details Tool for projecting a visually perceptible plumb line from a... Tool for projecting a visually perceptible plumb line from a...

2007-09-18

2007-09-18

Smith, R. Alexander (Department: 2859)

Geometrical instruments

Straight-line light ray type

Alignment device

C033S228000, C033S529000

Reexamination Certificate

active

11116481

ABSTRACT:
A tool for projecting a visually perceptible plumb line extending from a proposed location of a fire sprinkler head on a suspended ceiling. The tool includes a base and a self-leveling laser. The base is configured and arranged to supportably engage the support beams of an installed suspended ceiling grid system so as to support the tool when placed within a panel-retention frame of the installed grid system. The self-leveling laser is repositionably mounted on the base with a vertically extending laser beam which is plumb when the laser is level.

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