Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1993-05-06
1995-04-04
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310337, 310365, 310369, H01L 4108
Patent
active
054040680
ABSTRACT:
A piezoelectric device has a piezoelectric element (2) with an electrically conductive surface and an electrical terminal (1) spaced from that surface with a resilient, compressible mass of electrically conductive material (9) held captive between the terminal (1) and that surface to form an electrical connection therebetween. Typically, the electrically conductive material (9) comprises filaments, such as brass wire wool, having at least a conductive surface layer and which are resilient in bending so that when compressed they tend to expand and maintain continuous physical and electrical contact with the adjacent restraining surfaces. The low inertia of the resilient filaments and their multiple contact with the adjacent surfaces helps provide the required continuous contact. Thus, the use of a conventional soldered connection to the piezoelectric element and the associated stress related mechanical failure problems or physical access problems are avoided.
REFERENCES:
patent: 2150328 (1939-03-01), Keall et al.
patent: 2260842 (1941-10-01), Schwarzhaupt
patent: 2945208 (1960-07-01), Samsel
patent: 3068446 (1962-12-01), Ehrlich et al.
patent: 3142035 (1964-07-01), Harris
patent: 3313962 (1967-04-01), Sonderegger
patent: 4524295 (1985-06-01), Allensworth et al.
patent: 5199004 (1993-03-01), Monahan
Budd Mark O.
Dowty Maritime Limited
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