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:
Jan. 16, 1996
Filed:
Jun. 14, 1993
Gary R Cadman, Norwell, MA (US);
Scully Signal Company, Wilmington, MA (US);
Abstract
The present invention resides in a probe excitation and testing ('PET') system that can apply either a normal excitation or a 'small' bias test excitation to overfill protection probes mounted within storage and transport tanks used to store, e.g., flammable fluids. The PET system applies the normal excitation for normal operation of the probes to provide overfill protection, and applies a 'small' bias test excitation to the probes for performing diagnostic tests, including anti-cheating. The PET system can also perform a probe signature validation test under normal excitation to ascertain whether the probes are responding thereto in accordance with specifications relating to characteristic parameters of the probes' output waveforms, e.g., duty cycle, magnitude, and period.