375,345. Luminous signs. VINCENT, J. B., 36, Bibury Road, Hall Green, Birming- ham. March 12, 1931, No. 7594. [Class 3 (ii).] A box sign facia designed to give the effect of a neon sign comprises a stencil e the openings in which are filled with strips of glass f having rounded or curved front edges while the rear edges are bedded against a stationary diffusion plate d illuminated by a lamp b and parabolic reflector c. The sides of the strips f are preferably roughened, and a red-coloured diffusion plate may be used to assist the " neon " effect. The strips f may be secured by cementing, or by insertion into fillets of cork, soft metal, or other substance which overlaps the plate d to form a reflecting or coloured enlargement of the sign visible from the front. A drainage channel a may be provided beneath the hinge a of the box sign. In a modification, the sign is built into a wall, and separate interchangeable letter units are employed. According to the Provisional Specification the strips may be replaced by tubes of glass filled with coloured substances.