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:
Apr. 17, 1990
Filed:
Jul. 07, 1988
Jean-Luc Lamarche, Langenargen, DE;
I F M Electronic GmbH, Essen, DE;
Abstract
An electronic switchgear operating contact-free, having a presence indicator which can be externally affected, a switching amplifier disposed downstream of the presence indicator an electronic switch controllable by the presence indicator via the switching amplifier a supply circuit for the provision of the supply voltage for the presence indicator and for the switching amplifier and a delay circuit preventing activating pulses. The supply circuit has a voltage and/or current regulator. In the electronic switchgear in accordance with the invention activating pulses are prevented with a higher degree of assurance than in the state of the art, namely based on the fact that the delay circuit becomes active, i.e. the delay time starts, only after the voltage and/or current regulator has started to operate.