Lead attachment for an acoustic transducer

• US 4,479,069 A
• Filed: 11/12/1981
• Issued: 10/23/1984
• Est. Priority Date: 11/12/1981
• Status: Expired due to Term

• Current Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Original Assignee: Hewlett-Packard Company (HP Inc.)
• Inventors: Miller, David G.
• Primary Examiner(s): Miller, J. D.
• Assistant Examiner(s): REBSCH, DONALD
• Application Number:
  US06/320,377
• Time in Patent Office: 1,076 Days
• Field of Search: 310/334, 310/335, 310/337, 310/348, 310/366, 310/326, 310/364, 310/327, 310/353, 174/117 F, 174/117 FF, 339/17 F, 339/176 MF
• US Class Current: 310/334
• CPC Class Codes: B06B 1/0622 on one surface
• 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

Abstract

An acoustic transducer having a crystal stack or crystal stacks forming shelves, and leads adhered to a flexible sheet having an opening that fits over the part of the stack that extends above the shelves so as to permit the leads to be aligned with and make electrical contact with the respective crystals.

Claims

1. A transducer assembly including

a first array of parallel crystals,

a second array of parallel crystals having faces respectively adhered to the faces of the crystals of the first array with the faces of the crystals of said first array protruding beyond the faces of the crystals of the second array so as to form at least one shelf,

electrical conductors respectively in contact with the adhered faces of the crystals of each array, the said conductors respectively extending along the faces of said first array that form said shelf, and

a sheet of insulating material having means defining an opening therein, said opening closely fitting around the second array at the point where the faces of its crystals are adhered to the faces of the crystals of said first array, said sheet carrying separate electrical conductors that are respectively in contact with the electrical conductors on the faces of the crystals of said first array that form said shelf.

2. A transducer assembly as set forth in claim 1 wherein two shelves are formed and wherein said electrical conductors on one side of said opening are aligned with alternate crystals and the electrical conductors on the other side of said opening are aligned with crystals between said alternate crystals.

3. A transducer assembly as set forth in claim 1 wherein the insulating material of said sheet is flexible so that it can be bent over the ends of the crystals of said first array.