Drop finder

Details Drop finder Drop finder

1995-11-24

1997-08-05

Will, Thomas B.

Geometrical instruments

Gauge

Pipe layout or fitting

33520, 33666, 33579, B25H 704

Patent

active

056530366

ABSTRACT:
The invention is a device used to mark a point in connection with the installation of an indoor sprinkler system in a ceiling or wall such that the device is connected to installed sprinkler system piping and the telescopic pointer is extended to the necessary length to mark a point in the ceiling or wall where the sprinkler head should be installed or where connector piping should be installed.

REFERENCES:
patent: 160471 (1875-03-01), Robinson
patent: 375795 (1888-01-01), Beyerle
patent: 2245646 (1941-06-01), Bullivant
patent: 2314149 (1943-03-01), Lipscomb et al.
patent: 3407509 (1968-10-01), Martinez
patent: 3808690 (1974-05-01), Balder
patent: 4141147 (1979-02-01), Klassen et al.
patent: 4202108 (1980-05-01), Adams, Jr.
patent: 5155917 (1992-10-01), Townsend et al.
patent: 5241756 (1993-09-01), King

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