Stabilized locking mechanism for threaded tuning screws in...

Details Stabilized locking mechanism for threaded tuning screws in... Stabilized locking mechanism for threaded tuning screws in...

H - Electricity

01

P

333/104

H01P 1/20 (2006.01) H01P 1/00 (2006.01) H01P 1/28 (2006.01) H01P 7/06 (2006.01)

Patent

CA 1071722

L-484 STABILIZED LOCKING MECHANISM FOR THREADED TUNING SCREWS IN WAVEGUIDES by David D. Owlett ABSTRACT OF DISCLOSURE A threaded invar tuning screw extending through the threaded aperture of an invar bushing in the broad wall of a waveguide filter presents a capacitance inside the waveguide. This capacitance is varied by changing the depth of the screw in the waveguide in order to tune the filter. A brass locknut on the screw has a truncated, conically shaped bottom that mates with a similarly shaped countersunk hole on the bushing, the conical bottom, countersunk hole, and screw being coaxial. The mating surfaces on the nut and the countersunk hole reduce lateral movement of the screw during tuning and fixing of the position of the latter by tightening the locknut against the bushing. - 1 -

276682

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