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. 04, 2000
Filed:
Mar. 18, 1999
Applicant:
Inventor:
Andrew Smart, Loughborough, GB;
Assignee:
BG plc, Reading, GB;
Primary Examiner:
Int. Cl.
CPC ...
G01B / ; G01B / ; G01B / ; G01V / ; H01H / ;
U.S. Cl.
CPC ...
324220 ; 324 67 ; 32420717 ; 324326 ; 335442 ; 33558 ; 200 6142 ;
Abstract
A flexible probe for insertion into an auxiliary pipe indicates the proximity of the auxiliary pipe to a device within a main pipe. The probe includes an apparatus for generating a magnetic field for detection within the main pipe. An indicator associated with the probe generates a signal when the probe is adjacent the main pipe. The magnetic field generating apparatus includes a coil with an electronic circuit for generating an alternating current signal and also includes a switch operable when the probe contacts the main pipe.