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:
Apr. 03, 1984
Filed:
May. 06, 1982
James M Buzbee, Mineral Wells, TX (US);
Other;
Abstract
The invention provides an improved method of testing conductor pairs in a telephone cable to determine presence or absence of a customer phone, its location relative to a cable throw or test location and the type of service. Certain types of trouble shooting tests can also be made. The improved method involves utilization of a Wheatstone bridge type connection wherein first and second legs have a common connection at one end to the central office direct current voltage source and consist respectively of a conductor of a pair in a first cable and its corresponding half tap conductor in a second cable; wherein a meter is connected between the first and second legs at the cable throw or test location; wherein a third leg comprises a customer telephone or a test pair; and wherein the fourth leg comprises either an open, or selectably either a variable resistance or a variable reactance, or both.