Display apparatus for a first out type of fault status annunciator having a series string of interlock switches

• Main Authors: PAUL B. PATTON, GREGORY J MERTEN
• Format: Patent
• Language: English
• Published: 30.12.1993
• Edition: 5
• Subjects: ALARM SYSTEMS; BLASTING; COMBUSTION APPARATUS; COMBUSTION PROCESSES; HEATING; LIGHTING; MECHANICAL ENGINEERING; ORDER TELEGRAPHS; PHYSICS; REGULATING OR CONTROLLING COMBUSTION; SIGNALLING; SIGNALLING OR CALLING SYSTEMS; WEAPONS

An annunciator for the status of interlock switches connected into a series circuit for supplying power from a power source to a load, includes a memory recording the status of each switch at a selectable instant. A plurality of display elements are arranged in a pattern corresponding to the pattern...