公开(公告)号：US3781576A

公开(公告)日：1973-12-25

申请号：US3781576D

申请日：1972-09-08

Applicant: COMBUSTION ENG

Inventor： RUNDE H ,  KOWLES J

IPC: H04R1/00 ,  G01N29/24 ,  G01N29/28 ,  G10K11/00 ,  H04R17/00

CPC classification number: G10K11/004

Abstract: An ultrasonic transducer for use in a high temperature environment comprises a support frame supporting a crystal holder in turn supporting a piezoelectric crystal. Biasing means urge said crystal into non-rigid supported relationship with the crystal holder. The crystal surface facing the holder is electrically conductive and an electrically insulating material resistant to high temperatures is located between the crystal and the holder to maintain electrical isolation therebetween. The crystal holder may be movable relative to the support frame to permit extending or withdrawing the crystal into or from an operative position and to allow the crystal orientation to be angularly varied relative to at least a part of the support frame.