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:
Mar. 09, 2004
Filed:
Sep. 27, 2002
Roger S. Clarke, Lititz, PA (US);
Automatic Timing & Controls, Inc., Lancaster, PA (US);
Abstract
An electrical safety monitor ( ) includes a housing ( ) with a display face ( ) and a securing section ( ) that connects with an electrical panel ( ). Electrical circuitry ( ) is contained in the housing ( ). The electrical circuitry ( ) communicates with electrical lines (L , L , L , GND) of the panel ( ), and defines high impedance electrical paths between pairs of electrical lines (L , L , L , GND). Each high impedance path includes a positive light emitting diode (D , D , D , D ) arranged to draw current from a line carrying a positive electrical energy potential and a negative light emitting diode (D , D , D , D ) arranged to draw current from a line carrying a negative electrical energy potential relative to the positive electrical energy potential. The positive and negative light emitting diodes are disposed on the display face ( ) of the housing ( ). Each light emitting diode produces light responsive to current flow in a high impedance path that includes the light emitting diode.