73122042
Apr 8, 1977
May 29, 1979
ELECTRO-MAGNETIC SAFETY SWITCHES USED FOR CONTROLLING THE OPERATION OF VARIOUS TYPES OF POWER UNITS, SUCH AS INTERNAL COMBUSTION ENGINES, DIESEL ENGINES, ELECTRIC MOTORS, PUMPS AND GENERATORS, BY SHUTTING THE SAME DOWN IN THE EVENT THAT AN OPERATING MALFUNCTION IS SENSED
Electrical and Scientific Apparatus