Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive
Patent
1987-04-21
1988-05-24
Stearns, Richard R.
Geometrical instruments
Indicator of direction of force traversing natural media
Level or plumb, terrestrial gravitation responsive
G01C 928
Patent
active
047456884
ABSTRACT:
A trueing device for use in the hanging of wallpaper, which trueing device comprises first and second jaws which are biased to a closed position for gripping a longitudinal edge of the wallpaper, first and second hand grips respectively positioned one on each of the first and the second jaws, a spirit level for enabling the trueing device to give a true vertical line, and abuting means against which the longitudinal edge of the wallpaper abuts in order that the trueing device is correctly positioned along the longitudinal edge of the wallpaper. The trueing device is such that it is operable with one hand for ease of insertion and removal of the trueing device on the wallpaper during hanging of the wallpaper.
REFERENCES:
patent: 376341 (1888-01-01), Panyard
patent: 1241341 (1917-09-01), Chambers
patent: 2168505 (1939-08-01), Zenewich
patent: 2624118 (1953-01-01), Anderson
patent: 4066232 (1978-01-01), Hermeyer
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