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. 27, 1982
Filed:
Jul. 17, 1980
Applicant:
Inventor:
Herbert Ernyei, Conflans Ste Honorine, FR;
Assignee:
Lignes Telegraphiques et Telephoniques, Conflans Ste Honorine, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03H / ; H03H / ;
U.S. Cl.
CPC ...
333197 ; 333186 ;
Abstract
An electromechanical band pass filter includes a plurality of cells in cascade. Each cell comprises two parallel cylindrical bars forming longitudinally vibrating resonators and a flexurally vibrating cylindrical coupler connected between the two resonators. The cell of rank i is dimensioned such that one of its relative limiting frequencies is linked with the frequency of a cell for an electrical low-pass filter by the relationship: ##EQU1##