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. 15, 2001
Filed:
Sep. 30, 1998
Mark A. Kappel, Brookfield, WI (US);
Richard W. Waltz, Franklin, WI (US);
Richard G. Smith, Caledonia, WI (US);
Donald F. Swietlik, Waukesha, WI (US);
Raymond H. Hannula, Delafield, WI (US);
Christopher J. Wieloch, Brookfield, WI (US);
Jeffrey R. Annis, Waukesha, WI (US);
Rockwell Technologies, LLC, Thousand Oaks, CA (US);
Abstract
An electromagnetic operator includes first and second coils wound coaxially An armature partially surrounds the coils for channeling flux during energization of the coils. The armature may be formed of a bent plate and secured to a ferromagnetic support. A control circuit applies energizing signals to the coils during operation. Both coils are energized during an initial phase of operation. One of the coils is subsequently released or de-energized automatically. A timing circuit removes current from the second coil after a variable time period. The time period may be a function of the configuration of the timing circuit, such as an RC time constant, and of the energizing signal.