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. 08, 1982
Filed:
May. 21, 1980
Alfred Hauenstein, Munich, DE;
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Abstract
Electronic sensor on/off switch for a load connected to an a-c supply network includes a controlled semiconductor switch connected in series with the load, a sensor for switching the load on and off, a control circuit connected from the sensor to the switch, the switch being addressable by the control circuit in a conducting state with the load switched on by a signal holding the switch in the conducting state at the zero crossing of a current passing through the load, and in a non-conducting state with the load disconnected by a signal switching the switch into the conducting state for switching on the load at the zero crossing of an output a-c voltage at the switch, a power supply circuit connected to the control circuit, a two-terminal voltage limiting network connected in a series circuit with the switch for generating an amplitude-limited a-c voltage if the switch is conducting, an inductive converter connected to the two-terminal voltage limiting network, a terminal producing a reference potential point connected to the two-terminal voltage limiting network, a storage capacitor connected to the inductive converter for producing a supply voltage for the control circuit relative to the reference potential point, a branch connected to the series circuit of the two-terminal voltage limiting network and the switch including the storage capacitor and a rectifier, and another terminal connected between the storage capacitor and the rectifier for producing the supply voltage in the non-conducting state of the switch, the storage capacitor being charged by the output a-c voltage when the switch is in the non-conducting state.