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:
Sep. 07, 1999
Filed:
Nov. 03, 1997
Detlef Schulz, Altenriet, DE;
Gerhard Kurz, Althengstett, DE;
Abstract
A method for controlling the output of electrical consumers connected to ac voltage, especially ohmic loads such as hot-plates, fans, hot-air blowers, electric heaters and the like, wherein an electric or electronic circuit component which conducts ac voltage in both directions, preferably a triac, is connected in series with the consumer, and the output control is effected at the consumer by the given angle of the phase control. An additional electric or electronic circuit component is arranged in parallel to the first series switching element, however, the additional component is controlled first so as to conduct in a controlled manner at the trigger time determined by the device control. The current flow of the additional component is substantially taken over by the first circuit component at the latest when reaching a predetermined threshold current through the load or a threshold voltage at the load or triac.