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. 07, 1982
Filed:
Sep. 12, 1980
James R Clinton, Seattle, WA (US);
Huntron Instruments, Inc., Lynnwood, WA (US);
Abstract
A signal source in the form of a 60 Hertz voltage generator provides a 12 volt peak-to-peak signal to the primary winding of a transformer having a secondary winding which has an upper lead, a lower lead, a return lead which is between the upper and lower leads, and a tap lead between the lower lead and the return lead. The lower lead is connected through a variable resistance to the return lead. The movable arm of the variable resistance is connected to a first amplifier circuit, the output of which is applied to one of the horizontal deflection plates of an oscilloscope. The upper lead is connected through a 5 ohm resistor to ground and also to the input of a second amplifier circuit, the output of which is applied to one of the vertical deflection plates of the oscilloscope. The tap lead is connected to a first test lead, and the other test lead is connected to ground. The two test leads are moved by an operator along the circuit being tested to locate electrical shorts in the circuit and/or the elements comprising the circuit.