Abstract A double-tuned circuit device includes a housing, an input lead and an output lead, and a base plate having a conductive surface which is adopted to be received within the housing. A pair of resonator units are separately mounted on the base plate. Each of the units comprises a helical coil having a first end and a second end with a tap therebetween. An insulating cylinder is situated within the coil and mounted on the plate. A rod is movably received within the cylinder to permit adjustment of the resonant frequency of the unit. The tap of each of the units is connected to a different one of the leads and the first ends of each of the coils is connected to the conductive surface of the base plate. Means for adjusting the electromagnetic coupling coefficient of the units is provided comprising a third insulating cylinder mounted on the base plate between the units and a third rod movably received therein.
A double-tuned circuit device comprising a housing, an input lead and an output lead, a base plate having a conductive surface and adapted to be received within said housing, a pair of resonator units each of which comprises a helical coil having a first end and a second end with a tap therebetween, an insulating cylinder situated within said coil and mounted on said base and a rod movably received within said cylinder, said tap of each of said units being connected to a different one of said leads, said first ends of each of said coils being connected to said conductive surface and means for adjusting the electromagnetic coupling coefficient of said units, said means comprising a third insulating cylinder mounted on said base between said units and a third rod movably received therein.
Claim 2
Dependent Claim
135 words
A double-tuned circuit device comprising a housing, an input lead and an output lead, a base plate having a conductive surface and adapted to be received within said housing, a pair of resonator units each of which comprises a helical coil having a first end and a second end with a tap therebetween, an insulating cylinder situated within said coil and mounted on said base and a rod movably received within said cylinder, said tap of each of said units being connected to a different one of said leads, said first ends of each of said coils being connected to said conductive surface and means for adjusting the electromagnetic coupling coefficient of said units, said means comprising a third insulating cylinder mounted on said base between said units and a third rod movably received therein.
Claim 3
Dependent Claim
51 words
The device according to claim 1 wherein said housing has a plurality of access holes therein, one of said access holes being aligned with each of said rods such that a tool may be inserted through said hole to move said rod relative to the cylinder into which it is received.
Claim 4
Dependent Claim
33 words
The device according to claim 1 wherein said cylinders are internally threaded and said rods are externally threaded such that said rods are axially movable relative to the respective cylinders by rotation thereof.
Claim 5
Dependent Claim
18 words
The device according to claim 1 wherein said coils and said rods are completely received within said housing.