Importance

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Abstract

A variable capacitor can be constructed so as to utilize two elongated metal strips serving as electrodes. Such strips are secured to one another so that at least a part of one is above at least a part of the other. The electrodes are insulated from one another and are disposed in a helical coil in which the turns are spaced from one another a sufficient extent to permit relative movement between the individual turns. In the disclosed capacitor a support or mounting collar is secured to the outermost turn and a movable actuator is secured to the innermost turn. Preferably at least one of the electrodes is sufficiently resilient so as to serve as a helical spring which will return the coil back to its initial configuration after at least one turn of the coil has been moved relative to an adjacent turn of the coil. A second collar may be located around the first and secured to the first by a flexible mounting structure such as a spring.

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First Claim