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:
Aug. 08, 1995
Filed:
Feb. 25, 1993
Brian J Kadwell, Holland, MI (US);
RobertShaw Controls Company, Richmond, VA (US);
Abstract
A control device and methods of making and operating the same are provided, the control device comprising a microcomputer unit, a relay unit having a coil and contacts that are operated to one condition thereof when a direct current flows through the coil, the relay unit having a certain voltage rating, a power supply unit for being interconnected to a high voltage alternating current power supply that has a certain frequency, and a circuit operatively interconnecting the units together, the power supply unit comprising a transformerless capacitor arrangement for creating a low voltage direct current source from the power source to power the microcomputer unit and the coil, the power supply unit comprising an arrangement for creating from the transformerless capacitor arrangement a first low voltage direct current for powering the microcomputer unit and a second low voltage direct current for powering the coil of the relay unit whereby the first low voltage direct current and the second low voltage direct current comprise the low voltage direct current source.