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. 15, 1997
Filed:
Jun. 07, 1995
John W Pitre, Jr, Houston, TX (US);
Jere D Whorton, Houston, TX (US);
Tekneon Corporation, Houston, TX (US);
Abstract
A protection circuit for monitoring the power from a luminous tube transformer to a luminous tube including sensor connected to a secondary of the transformer, a window comparator circuit connected to the sensor and providing a fault signal when the sensor output exceeds the window limits, and a driver switching off power to the transformer primary when the driver receives a fault signal. A temperature compensation circuit monitors the ambient air temperature for providing a time delay before disconnecting the power supply until the luminous tube stabilizes, and also turns off the power supply when the ambient temperature exceeds upper and lower limits.