Wave transmission lines and networks – Automatically controlled systems – With control of equalizer and/or delay network
Patent
1975-03-10
1976-10-12
Smith, Alfred E.
Wave transmission lines and networks
Automatically controlled systems
With control of equalizer and/or delay network
310 82, 310 86, 333 72, H03H 904, H03H 926, H03H 932, H01L 4110
Patent
active
039861503
ABSTRACT:
Herein disclosed is a reed type electromechanical filter device which comprises a vibrator element having a pair of spaced parallel arm portions adapted to vibrate in lateral directions, a pair of piezoelectric ceramic plates or electromechanical transducer elements mounted on the arm portions of the vibrator element, and a pair of elastic metal members respectively mounted on the outer side faces of the arm portions and/or a pair of elastic metal members respectively mounted on the inner side faces of the arm portions. The elastic metal members are effective to prevent the arm portions from directly striking against each other and/or the inner faces of side walls of a housing enclosing the vibrator element in the event the filter device is subjected to a violent impact which would otherwise cause deterioration of the performance quality of the filter device.
REFERENCES:
patent: 3054915 (1962-09-01), Houck
patent: 3614485 (1971-10-01), Cosman et al.
patent: 3621467 (1971-11-01), Dostal
Akimoto Masao
Tanaka Toshiharu
Adams Bruce L.
Burns Robert E.
Lobato Emmanuel J.
Matsushita Electric - Industrial Co., Ltd.
Nussbaum Marvin
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