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. 25, 1995
Filed:
Aug. 08, 1994
Asulab S.A., Biel, CH;
Abstract
The invention concerns a window including at least a first sheet (16), a second sheet (18), said sheets being joined together by a connecting layer (20), characterised in that it also includes an ultrasonic device (12) placed between said sheets (16,18) and co-operating directly with a first face (24) of said first sheet (16) to detect the presence of foreign bodies on a second face (26) of said first sheet (16) opposite said first face (24), said device (12) comprising a transducer (28) able to emit, via a transmitting/receiving face, an incidental ultrasonic signal of wavelength .lambda. in said first sheet (16), the thickness of said first sheet being equal to K..lambda./2, where K is an integral number, and said transducer being able to receive, via said transmitting/receiving face a reflected ultrasonic signal representative of the presence or absence of said foreign bodies to generate a detection signal.