Geometrical instruments – Gauge – Door and window
Patent
1993-06-07
1994-12-27
Wirthlin, Alvin
Geometrical instruments
Gauge
Door and window
33414, 33471, G01B 524
Patent
active
053753348
ABSTRACT:
A doorframe template apparatus is provided which includes a T-shaped first straight edge member which includes a straight top member and a straight middle member extending perpendicularly from a middle portion of the top member. The straight top member includes a top flange member and a bottom flange member at right angles to the straight middle member. A second straight edge member is connected to the straight middle member by a lockable pivoted joint. The lockable pivoted joint enables the T-shaped first straight edge member to be adjusted with respect to the second straight edge member at angles that conform to respective doorframe angles when the straight top member of the T-shaped first straight edge member is placed against a doorjamb, and the second straight edge member is placed against a horizontal doorframe member. The straight middle member includes a first aperture. The second straight edge member includes a second aperture, and the lockable pivoted joint includes a threaded bolt and a lock nut secured to the threaded bolt. The threaded bolt passes through the first aperture and second aperture when the first aperture and the second aperture are placed in registration. The second straight edge member 14 may include an inner member and an outer member that is adjustable with respect to the inner member. A chalk line assembly may be connected to the second straight edge member.
REFERENCES:
patent: 577708 (1897-02-01), Barrie
patent: 977735 (1910-12-01), Hansen
patent: 1101517 (1914-06-01), Ahlvin
patent: 2973584 (1961-03-01), Snapp
patent: 4223445 (1980-09-01), Goodland
patent: 4451993 (1984-06-01), Yauk
patent: 4562649 (1986-01-01), Ciavarella
patent: 4910876 (1990-03-01), Channell
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