Acoustical tone generator

Details Acoustical tone generator Acoustical tone generator

G - Physics

10

K

197/1, 84/63

G10K 9/12 (2006.01) B41J 29/46 (2006.01)

Patent

CA 1147584

LE9-79-016 IMPROVED ACOUSTICAL TONE GENERATOR Abstract of the Disclosure In an impact typewriter/printer using a daisy wheel typefont a stepper motor for rotating said daisy wheel for character selection purposes and microprocessor facilities for controlling said stepper motor, means are provided for generating tones signalling the occurrence of predetermined events to be brought to the attention of the typist. For that purpose, the microprocessor facilities are used to detect and identify the occurring event and then generate a tone of a predetermined frequency by moving said stepper motor back and forth at given rates whereby the daisy wheel typefont is made to vibrate the surrounding air fluid and generate the acoustical tone.

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