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US 4,382,159 AGranted
Blow actuated microphone
OwnerRobert S. Bowditchinventor
Life of this patent
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Abstract
In acoustical sound processing equipment, a combination microphone and blow actuated keying and unkeying means. The speaking person blows a first time into a tube to key the processing equipment and blows a second time to unkey the equipment. The person also vocalizes into the tube. The tube is in fluid communication with a chamber which houses the microphone. A blow detector senses the blowing action and triggers a bistable flip-flop which in turn drives a keying relay.
Claims6
In an acoustical sound processing device a combination microphone means and blow actuated keying and unkeying means comprising:
- (a) a plenum chamber defining a pressure release orifice,
- (b) a conduit means in fluid communication with the chamber means, the conduit means having an open end to permit a speaker to vocalize and blow into the conduit means,
- (c) a blow detector means with two stable output states, a first and second, adapted to alternate between said states in response to blows of suitable strength which are directed into the conduit means such that for each distinct momentary blow, the output of the blow detector means changes state only once,
- (d) a means for keying and unkeying the sound processing device when the output of the blow detector means is in the first and second states respectively,
- (e) a transducer means disposed within the plenum chamber for converting acoustic vibrations to a corresponding varying electrical signal, the transducer means being in electrical communication with the sound processing device for the primary purpose of sending said signal to said device.
2 more elements
Dependencies are inferred from the claim text.