T-square, and methods of construction and utilizing same

Details T-square, and methods of construction and utilizing same T-square, and methods of construction and utilizing same

1993-08-23

1995-01-03

Cuchlinski, Jr., William A.

Geometrical instruments

Straightedge type

Plural straightedges nonadjustably fixed at right angles

33464, 33469, B43L 714

Patent

active

053774183

ABSTRACT:
A T-square device with a mechanism for efficient adjustment thereof. The device includes a scale, base, and trigger mechanism. The trigger mechanism is spring-loaded for automatic locking of the base to the scale. Applying a force on the trigger counteracts the spring-induced forces and thereby releases the lock on the base to the scale, thus allowing the base to be slidable along the scale. The base and trigger mechanism is sized proportionally to fit the human hand.

REFERENCES:
patent: 761707 (1904-06-01), Peyman
patent: 867812 (1907-10-01), Edwards
patent: 1402774 (1922-01-01), La Dow
patent: 1984951 (1934-12-01), Stowell
patent: 2104515 (1938-01-01), Golden
patent: 2404911 (1946-07-01), King
patent: 4245394 (1981-01-01), Peterson
patent: 4301600 (1981-11-01), Charnley
patent: 4599806 (1986-07-01), Wright
patent: 4736524 (1988-04-01), King

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