Blueprint of Brown Slate

Drawing, Technical

Accession Number: 1999.1.3

Scope & Content: Undated blueprint shows the side-hinged slate opened and positioned upright on its bottom edge, with a front plate (at left) that has 4 rows each of 26 cell openings; a middle plate that is an open frame; and a back plate (at right) with 4 rows of tiny circles representing indentations to accommodate the tip of a stylus. Slate dimensons: front plate, 8 1/4" x 1 3/4"; center open frame, 8 1/4" x 2 1/8"; back plate, 8 1/4" x 2"; and a hinge-space width of 3/16". Title "Braille Slate" appears at center below the drawing. Two inset drawings, one at top left and the other at top right, provide details for the cell openings and the cell indentations, respectively. Notation at top center: "To be made of 3 1/2" thick material. Middle section duraluminum. Outside sections aluminum."

Creator: Brown, Robert

Interview Date: / /

Collection: APH Collection

Credit Line: APH Archives

Administrative History: Blueprint was sent to A.C. Ellis, superintendent of the American Printing House for the Blind, in October 1942, from J. Robert Atkinson, president of the Braille Institute of America, on behalf of Robert Brown, inventor of the Brown Slate.

Subjects: Blueprints Braille Inventions Slates Tactile writing