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:
Dec. 15, 1981
Filed:
Mar. 31, 1980
Siegfried Klein, Paris 75009, FR;
Other;
Abstract
Sound emitter comprising a circuit generating an electrical signal at high frequency and high voltage, which is modulated by a low frequency signal which is to be transformed into sound waves, and which is applied to a corona-effect transducer at the input of an exponential horn. Transducer appears in the form of a cylindrical cartridge which is mounted slidably in a passage in the housing of the emitter, and one end of which is engaged in an accommodation provided at the input of the horn, while its other end projects beyond the outer end of passage; the discharge electrode has a cylindrical contact part which is exposed in an intermediate zone of the transducer, between the accommodation and the inner end of the passage; a metal contact member is electrically connected to the output of the generating circuit and is in sliding contact with the contact part of electrode; a metal plug is fixed detachably at the outer end of said passage and holds the transducer in place axially.