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. 02, 1998
Filed:
Aug. 06, 1996
Jong Kuk Park, Seoul, KR;
Anam Industrial Co., Ltd., Seoul, KR;
Abstract
A power drawing circuit for a two-wire switching unit, the two-wire switching unit including a switching control circuit having its positive voltage input terminal connected in series to a load, the load being connected to one side of a power source. The power drawing circuit comprises a voltage drawing part for drawing a voltage to be supplied to the switching control circuit when the switching unit is turned on, the voltage drawing part having its one side connected to the positive voltage input terminal of the switching control circuit and its other side connected to a negative voltage input terminal of the switching control circuit, a triac having its one side connected to the other side of the voltage drawing part, its other side connected to the other side of the power source and its gate connected to a control terminal of the switching control circuit, and a diode connected in parallel to the power drawing part for passing a reverse current, the diode having its anode connected to the negative voltage input terminal of the switching control circuit and its cathode connected to the positive voltage input terminal of the switching control circuit. The power drawing circuit is not restricted by the types of load. Also, the power drawing circuit is well adaptive even to reactance loads and simple in construction.