Signedface, center right: KEUFFEL & ESSER CO.
Inscribedface, center left: PARAGON 1375P-22;
face, center: K&E
FunctionFor use in a drafting machine, to draw straight edges at a prescribed angle.
The user inserts one of the cleats into one arm of the drafting machine. The cleat he chooses depends on the direction in which he needs his chosen scale (full or half size) to face. He uses a lever on the machine to adjust the angle of the scale.
Primary Sources"Paragon Drafting Machine." Catalogue of Keuffel & Esser Co. 38 (1936): 205-7.
ProvenancePrivate Donor, Troy, New York.