Protractor-Square

Protractor-Square

drafting
Robert A. Neault ('38) Collection

A white plastic protractor connected to a right angle square, allowing for dimension and angle drawing. The window below the protractor is has slightly non-parallel long edges that diverge at about 2-3˚. Design patent no. 93,979—meaning it was ornamental only, not claiming any conceptual innovation—for this instrument was filed on March 27, 1934 and issued to by Robert S. Grant of Providence, RI on Dec. 4 that same year. (Grant would also receive d design patent in 1949 for an ornamental circular drawing insrtument featuring protractor, various geometric shapes and curves, parallel line slots, and a line of holes that allowed the user to draw a limited number of circles/arcs; Design pat. no. 156,540).

Steven A. Walton

after late 1934

Physical Object

English

120x64x0.8mm 95mm diameter protractor

plastic

Robert S. Grant, Providence, RI

DES. PAT. NO. 93,979

Owned by Robert A. Neault ('38)

U.S. Design Patent no. 93,979, Dec. 4, 1934 [Google Patents]