|United States Patent||3,832,580|
|Yamamuro , et al.||August 27, 1974|
A transducer for converting electrical energy into mechanical or acoustic energy or vice versa using a converting means made of a thin film of high molecular weight polymer piezo-electric organic compound having orientated molecules and having electrodes bonded or deposited onto both surfaces thereof. When an electric current is applied to the electrodes, the thin film is extended or contracted in a direction different from the direction of orientation of the molecules. when the angle between these two directions is 45.degree., the extent of the extension or contraction of the thin film is at a maximum and the best converting efficiency can be obtained.
|Inventors:||Yamamuro; Isao (Tokyo, JA), Tamura; Masahiko (Tokyo, JA)|
Pioneer Electronic Corporation
|Filed:||January 4, 1973|
|Current U.S. Class:||310/328 ; 252/62.9R; 310/334; 310/337; 310/800; 369/144; 381/190|
|Current International Class:||H04R 23/00 (20060101); H04R 17/00 (20060101); H04r 017/00 ()|
|Field of Search:||310/8,8.2,8.3,8.5,8.6,9.1,9.4,9.6,8.1,8.7 340/10 179/11A,1.41P,1.1B 317/144 252/62.9|
|2487962||November 1949||Arndt, Jr.|
|2640889||June 1953||Cherry, Jr.|
|3007013||October 1961||Paull et al.|
Chemical Abstract, Vol. 67, 1967, section 73959n "Radiation-induced Solid State Polymerization". .
Review of the Electrical Properties of Wood and Cellulose, by R. T. Lin, Forest Products Journal, Vol. 17, No. 7, July 1967..