Combination square

Details Combination square Combination square

1985-10-31

1987-02-10

Little, Willis

Geometrical instruments

Straightedge type

Square and sliding nonpivotal straightedge

33464, 33474, B43L 700

Patent

active

046414355

ABSTRACT:
A straight edge stock is lockable at any desired location along the length of a steel rule with the stock and rule forming perpendicular straight edges. The stock includes an integral protractor triangle projecting from a thicker barrel of the stock and having a hypotenuse edge extending generally from the bottom of the stock barrel angularly toward the rule. The margin of the protractor triangle adjacent to its hypotenuse edge has a scale of angle calibration markings indicating the angle of a line connecting each individual marking and the top of the leading edge of the thicker stock barrel.

REFERENCES:
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patent: 778808 (1904-12-01), Starrett
patent: 1060388 (1913-04-01), Wall
patent: 1325097 (1919-12-01), Lalor
patent: 1532353 (1925-04-01), Waldron
patent: 1610803 (1926-12-01), McReynolds
patent: 1644624 (1927-10-01), Andersen
patent: 2448440 (1948-08-01), King
patent: 2654954 (1953-10-01), Lawrence
patent: 3293752 (1966-12-01), Shuman
patent: 3296702 (1967-01-01), Feddish
patent: 3456353 (1969-07-01), Iaus
patent: 3484945 (1969-12-01), Clark
patent: 3488868 (1970-01-01), Gutowski et al.

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