High hat actuating system with photoelectric control means

Details High hat actuating system with photoelectric control means High hat actuating system with photoelectric control means

1990-05-21

1991-07-02

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250221, 844223, 84421, 84746, 84721, G01D 534, H01J 156

Patent

active

050287761

ABSTRACT:
A high hat cymbals device is automatically actuated to hold the cymbals locked in place. The presence or absence of the drummer's foot on or above the foot pedal for actuating the high hat is sensed, and the cymbals held together if the drummer's foot is not sensed. Sensing is accomplished utilizing an infrared LED or other source of light, preferably one that is pulsed and frequency modulated, and a photodiode or other light sensing device. The signal from the photodiode is filtered and amplified and ultimately operates a solenoid to either allow normal operation of the high hat, or move the high hat cymbals together. The light source and sensor are mounted on the bottom of the foot pedal and cooperate with an opening in the foot pedal so that the light is reflected to the photodiode if the drummer's foot is present on or above the foot pedal, but passes through the opening if it is not.

REFERENCES:
patent: 4526079 (1985-07-01), Oguri
patent: 4528888 (1985-07-01), Hoshino
patent: 4667562 (1987-05-01), Lee
patent: 4730532 (1988-03-01), Bauerfeind

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