公开(公告)号：US3564303A

公开(公告)日：1971-02-16

申请号：US3564303D

申请日：1968-10-07

Applicant: WESTINGHOUSE ELECTRIC CORP

Inventor： GEIL FREDERICK G ,  DUNSWORTH WILLIAM K

IPC: H04R1/44 ,  H04R3/04 ,  H04R17/00

CPC classification number: H04R17/00 ,  H04R1/44 ,  H04R3/04

Abstract: An electromechanical transducer assembly is disclosed wherein a transducer member, for example a piezoelectric crystal, is utilized to convert a mechanical input thereto to an electrical output. An amplifier circuit including an active element, such as a field effect transistor of the metal oxide silicon type, is disposed on the member to receive the electrical output and to increase its power gain. An elastomer is disposed over the entire circuit and the member to encapsulate the entire circuit and prevent low-impedance paths from developing in and about the circuit. The elastomer is selected to have such an elasticity to permit the member to be highly sensitive to the mechanical input thereto.

公开(公告)号：US3890613A

公开(公告)日：1975-06-17

申请号：US39835073

申请日：1973-09-18

Applicant: WESTINGHOUSE ELECTRIC CORP

Inventor： DUNSWORTH WILLIAM K ,  GEIL FRED G

IPC: E02D31/00 ,  G08B13/20 ,  F16L1/00 ,  E02D3/14

CPC classification number: E02D31/00 ,  G08B13/20

Abstract: A controlled application of an anti-freeze ingredient to soil covering a buried pressure responsive device such as an intrusion detector, eliminates reduction in sensitivity of the device due to frozen soil conditions. An alternate technique for avoiding frozen soil conditions consists of providing a thermal insulating enclosure for the soil between the ground surface and the pressure responsive device.

Abstract translation: 将防冻成分控制施加到覆盖埋入式压力响应装置（例如入侵检测器）的土壤中，消除了由于冻土条件导致的装置的敏感性的降低。 用于避免冻土状况的替代技术包括为地表和压力响应装置之间的土壤提供绝热外壳。