Electromechanical filter using individual mechanical resonators - has metal supports projecting from opposite sides of each resonator cooperating with base and cover

摘要

The resonators (1) are secured to a common base (2) at their node points via metal supports (10,10') of much lesser thickness. The bottom of each support (10,10') fits into a groove formed in the surface of the base (2) containing solder or a cast mass (9). The supports (10,10') project from two opposite sides of each resonator (1) and the supports (10,10') of at least two of the resonators (1) are coated with a material which exhibits a reduced mechanical oscillation characteristic and which does not bond with the solder or cast mass (9). A cover (3) fits over the supports (10') projecting in the opposite direction to those attached to the base (2) for limiting the movement of the resonators (1) in the direction of the supports (10,10'). The filter is compact and of simple construction and has a reduced sensitivity to mechanical shock.