Module for presenting alpha numeric information

Details Module for presenting alpha numeric information Module for presenting alpha numeric information

1979-02-12

1980-07-29

Pitts, Harold I.

Communications: electrical

Audible indication

Percussion-type sound producer

3403781, G08B 526

Patent

active

042153387

ABSTRACT:
A module for presenting alpha-numeric information includes a plurality of shutter elements mounted on a module frame and arranged in rows and columns. Each shutter has a permanent magnet whose field is selectively opposed by an electromagnet mounted on the frame for pivoting each shutter.

REFERENCES:
patent: 3518664 (1970-01-01), Taylor

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