Sound actuated switch
OwnerDavid S. Markinventor
Life of this patent
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Abstract
A sound actuated detector comprising a microphone, an elastic cylinder having a flexible bottom adapted to fit tightly around the microphone with the sensing surface of the microphone fitting tightly against the flexible bottom, a mounting base connected to the surface of the cylinder having the flexible bottom, an elastic isolating medium arranged between the base and the surrounding surface to which the detector is attached, and a weight connected to the microphone having a mass such as to eliminate movement of the microphone in response to frequencies above a selected frequency.
Claims7
A sound actuated detector comprising a microphone, a cylinder having a flexible membrane perpendicular to its axis, the cylinder being adapted to fit tightly around the microphone with the sensing surface of the microphone fitting tightly against the flexible membrane, means for affixing the cylinder to a surface at which sound is to be detected, and a weight connected to the cylinder having a mass such as to distort the flexible membrane of the cylinder in response to frequencies in a selected range.
Dependencies are inferred from the claim text.