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:
Jun. 09, 1981
Filed:
Jan. 08, 1979
Elmer V Carlson, Prospect Heights, IL (US);
Industrial Research Products, Inc., Elk Grove Village, IL (US);
Abstract
An improved transducer construction of the type having a U-shaped armature mounted to have a vibrating arm extending through the tunnel of a cooperating coil. The arms of the armature are joined by a smooth bend to provide improved shock-resistant characteristics. The coil is initially located and properly positioned relative to the arm extending through the tunnel by means of shims. The transducer includes a case comprising a cup, and a cover for the cup, both being of a magnetic material. The cup and cover are joined together by welding to insure low reluctance flux paths therebetween to retain the magnetic fields developed by the transducer within the casing.