Electromechanical transducer for relief display panel

Details Electromechanical transducer for relief display panel Electromechanical transducer for relief display panel

1975-08-19

1977-08-23

Curtis, Marshall M.

Communications: electrical

Tactual indication

With input means

340336, G09F 932

Patent

active

040443507

ABSTRACT:
A reading plate has an array of holes in its surface. Rounded ends of rods project selectively through these holes by the action of a set of bimorphous piezoelectric reeds, on which they rest perpendicularly. Each reed is connected to a source of electric voltage which can assume two distinct values as a function of an electrical control signal in order to make the piezoelectric reeds bend in one direction or the other. The reading rods are distributed in groups of six and arranged in each group according to the conventional arrangement of dots of a braille character. The transducer can thus provide a relief read-out panel for a pocket electronic calculator for the blind.

REFERENCES:
patent: 3395247 (1968-07-01), Fieldgate
patent: 3588552 (1971-06-01), Schafft
patent: 3697790 (1972-10-01), Flint et al.
Manual Tactile Converter, Schaaf; IBM Tech. Discl. Bull., vol. 17, No. 8, pp. 2208-2209; Jan. 1975.

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