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:
May. 28, 1985
Filed:
Jan. 26, 1984
Pierre Schwob, Lyons, FR;
Christian Mieg, Meyzieu, FR;
SEB S.A., Selongey, FR;
Abstract
An electronic safety device for automatically interrupting the supply of electric current to a heating resistor of an iron at the end of a predetermined interval of non-use, comprising a movable body adapted to control a position of contacts of an associated switch so that at least one opening-closing sequence of the switch contacts is obtained upon displacement of the movable body. Associated with the switch is a resistor bridge supplied with a rectified voltage E and comprising a first resistor R.sub.1 and a second resistor R.sub.2 in series with the switch contacts. A capacitor is connected to the terminals of resistor R.sub.2, a voltage V.sub.o being collected at the terminals of said resistor R.sub.1 and being applied to one input of a counter which is reset to zero each time voltage V.sub.o is higher than E/2, that is, upon closing of the contacts. The counter is connected to an input of a comparator for transmitting a voltage V.sub.1 when the counter attains a predetermined counting threshold. The comparator is connected to a trigger of a triac having one terminal connected to a current supply and another terminal connected in series to the heating resistor. The comparator is adapted to deliver turn-on pulses to the trigger as long as no voltage V.sub.1 is applied and to stop these turn-on pulses as soon as a voltage V.sub.1 is applied, thereby interrupting the current supply to the heating resistor.