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:
Jan. 05, 1982
Filed:
Jul. 16, 1979
Applicant:
Inventor:
James E Corrigan, Plymouth, MA (US);
Assignee:
Heath Consultants Incorporated, Stoughton, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01M / ; H01L / ; H04R / ; H04R / ;
U.S. Cl.
CPC ...
1791 / ; 73592 ; 73DI / ; 179184 ; 181125 ; 310340 ; 340605 ; 367180 ;
Abstract
A listening device for pinpointing water leakages, which includes a manually operated rod having a handle at one end for manually positioning of the listening device. An acoustic pick-up apparatus is mounted on the other end of the rod, and it comprises a ceramic audio tone transducer which is operatively connected to an amplifier-receiver which has a level meter on which visual leak signals may be seen. The acoustic pick-up apparatus is also connected to a head phone set to allow hearing of the leaks. The transducer includes a brass diaphragm directly attached to a threaded stud for mounting in the rod.