Volume control device

Details Volume control device Volume control device

2011-05-24

2011-05-24

Qin, Jianchun (Department: 2832)

Music

Instruments

Electrical musical tone generation

Reexamination Certificate

active

07947892

ABSTRACT:
The volume control device temporarily alters the loudness of an electric musical instrument by allowing all (or part) of the audio signal to leak through a photosensitive resistor to ground. A light source is positioned so as to affect the value of the photosensitive resistor. The user indirectly controls the audio level by manipulating the light source in various ways: a control switch turns the light on and off; a selector switch determines whether the light source is normally off and turned on by the control switch, or vice versa; the brightness of the light source is adjusted by a variable resistor; and the time taken for the light to reach maximum brightness is controlled by an RC circuit. The device is removable and compatible with any electric instrument.

REFERENCES:
patent: 2699085 (1955-01-01), Zuck
patent: 3045522 (1962-07-01), Markowitz et al.
patent: 3686508 (1972-08-01), Arave
patent: 7582825 (2009-09-01), Chien et al.
patent: 7741556 (2010-06-01), Demsey et al.
patent: 2005/0252363 (2005-11-01), Rockett

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