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US 4,063,206 AGranted
Tunable electrical component
OwnerEdgar Walker, IIIinventor
Life of this patent
Estimating the term…
Abstract
An electrical component such as a base loading coil assembly for a fixed length mobile radio antenna is disclosed featuring an electrical coil having a series of windings and an adjustable shorting screw disposed in line with the longitudinal axis of the coil and being rotatable on at least a portion of the windings so as to translate along the longitudinal axis of the coil to vary the inductance thereof.
Claims11
An electrical component comprising
- a first coil of electrically conductive material having a plurality of windings,
- an adjustable shorting screw disposed in line with the longitudinal axis of said coil, said shorting screw being adapted to rotate on at least a portion of said windings and translate along said longitudinal axis to vary the electrical inductance of said coil,
- a mass of dielectric material defining a generally cylindrically shaped hollow shaft therein opening onto one end of said mass, at least a portion of said first coil being partially embedded in said mass around the defining wall of said shaft, said screw being adapted to translate at least partially into and out of said shaft and first coil, and
- a rotatable sleeve defining a hollow cylindrically shaped chamber therein opening onto one end of said sleeve, said mass having a cylindrically shaped surface adapted to fit at least partially in said chamber in relatively close conforming rotatable relation therewith, said screw being attached to the other end of said sleeve.
1 more element
Dependencies are inferred from the claim text.