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. 14, 1999
Filed:
Sep. 16, 1997
Robert S Janus, Quaker Hill, CT (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
A slotted cylinder transducer is provided having a cylindrical metal or cosite material shell. A cylindrical piezoelectric driver is bonded to the inside of the shell with an opening corresponding to the slot. The shell thickness is tapered radially about the longitudinal axis such that the thickness is a maximum 180.degree. away from the slot and decreases progressively to a minimum adjacent each side of the slot. The piezoelectric driver is reverse tapered from the shell taper in that the thickness of the driver is a minimum 180.degree. away from the slot and increases progressively to a maximum adjacent each side of the slot. This taper places a larger volume of the driver material in the slot region of the shell where the maximum radial displacements occur, thus providing higher acoustic energy levels. When used as a hydrophone to detect acoustic signals in the surrounding medium, the larger volume of material at the point of maximum displacement provides increased signal detection capability.