Transmutable rule

Details Transmutable rule Transmutable rule

1984-11-21

1986-07-15

Little, Willis

Geometrical instruments

Straightedge type

Plural straightedges, relatively moveable

33474, 33479, 33484, B43C 706

Patent

active

045998051

ABSTRACT:
A pair of simple rules, each having a body portion identical with a standard rule and a head at one end cooperating with the other rule, for placing the two rules in an arrangement forming a T-square, and enabling one to be moved or slid along the other. A modified form includes means for releasably binding the two rules together in set position.

REFERENCES:
patent: 888070 (1908-05-01), Dissell
patent: 1039057 (1912-09-01), Hill
patent: 2908079 (1959-10-01), Barrett

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