T-square apparatus

Details T-square apparatus T-square apparatus

1985-04-05

1987-01-13

Martin, Jr., William D.

Geometrical instruments

Straightedge type

Combined with level

33381, 33404, G01C 924

Patent

active

046353771

ABSTRACT:
An adjustable T-square apparatus comprising a generally triangular frame having first and second working surfaces normal to each other and a third working surface at a 45.degree. angle to the first and second working surfaces is disclosed. The apparatus further comprises three level vials mounted on the frame in parallel relation to separate working surfaces. A pair of measuring blades are slidably mounted on the frame in parallel relation to the first and second working surfaces.

REFERENCES:
patent: 778808 (1904-12-01), Starrett
patent: 1892622 (1932-12-01), Mayes
patent: 2113524 (1938-04-01), Wolfe
patent: 2635350 (1953-04-01), Bettega
patent: 2973584 (1961-03-01), Snapp
patent: 3180036 (1965-04-01), Meeks
patent: 3187437 (1965-06-01), Ellis
patent: 3311990 (1967-04-01), Wright
patent: 3513558 (1970-05-01), Kuchta et al.
patent: 3524259 (1970-08-01), Handley
patent: 4404753 (1983-09-01), Klok

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