Electromechanical transducers

• US 3,219,850 A
• Filed: 09/16/1957
• Issued: 11/23/1965
• Est. Priority Date: 09/16/1957
• Status: Expired due to Term

• Current Assignee: Robert A. Langevin
• Original Assignee: Robert A. Langevin
• Inventors: Langevin, Robert A.
• Application Number:
  US03/684,096
• Time in Patent Office: 2,990 Days
• US Class Current: 310/333
• CPC Class Codes: G01C 19/5642 using vibrating bars or beams
• CPC Class Codes: H04R 17/00 Piezoelectric transducers; Electrostrictive transducers piezoelectric or electrostrictive elements in general H10N30/00; details of piezoelectric or electrostrictive motors, generators or positioners H10N30/00
• CPC Class Codes: H04R 17/08 signals being recorded or played back by vibration of a stylus in two orthogonal directions simultaneously

Claims

1. AN ELECTROMECHANICAL TRANSDUCER COMPRISING:

A PLATE OF ELECTROMECHANICALLY ACTIVE MATERIAL RESPONSIVE IN THE FACE SHEAR MODE AND A PLATE OF ELECTROMECHANICALLY ACTIVE MATERIAL RESPONSIVE IN AN EXTENSIONAL MODE, SAID PLATES BEING SUPERPOSED AND MECHANICALLY COUPLED WITH A RESPECTIVE MAJOR SURFACE OF EACH IN CONFRONTING RELATION.