05880954 is referenced by 101 patents and cites 18 patents.

A safety-related control system (SRCS) designed to safeguard personnel operating hazardous production equipment. The SRCS integrates the safety-related part of a machine into one homogenous system for the purpose of increasing safety. In so doing, the SRCS monitors the machine, the operator, and itself for safe operation. The SRCS utilizes a non-material barrier to sense the intrusion of a person's body into a hazardous area of a machine. The SRCS uses machine feedback and/or operator interface to determine whether a hazardous condition is present. If such condition is present, the hazard is rendered harmless by the time the intruding body member can reach the potential danger area. The system includes separable means for stopping motion of the moving parts of the equipment, starting movement of the movable parts, and detecting faults in sections of the system.

Title
Continous real time safety-related control system
Application Number
8/567033
Publication Number
5880954
Application Date
December 4, 1995
Publication Date
March 9, 1999
Inventor
Frederick Thomson
10 Fenner Grant La., Cumberland, 02864
RI, US
Robert Thomson
7 Industrial Dr. South, Smithfield, 02917
RI, US
Agent
Thomas L Bohan
Chris A Caseiro
IPC
G01V 8/10
G05B 9/02
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