The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 04, 1978
Filed:
May. 02, 1977
Applicant:
Inventor:
Bruce R McAvoy, Pittsburgh, PA (US);
Assignee:
Westinghouse Electric Corp., Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03H / ; H03H / ; H01L / ;
U.S. Cl.
CPC ...
333 / ; 310366 ; 333 72 ;
Abstract
A bulk acoustic delay device incorporating a transmitting transducer, a substrate, and two receiving transducers is described which may reduce the amplitude of undesired received reflected bulk acoustic waves by positioning one of the two receiving transducers to receive only the reflected wave having a longer acoustic path length due to wave diffraction to provide an output signal having a normal delayed signal and an attenuated triple or quadruple transit echo signal due to destructive interference. An alternate embodiment utilizes one composite receiving transducer.