DYNAMATIC

ELECTRO-MAGNETIC CLUTCHES OR COUPLINGS FOR USE AS ELECTRIC VARIABLE-SPEED POWER TRANSMISSIONS ON POWER BOATS AND ON INDUSTRIAL MACHINERY-NAMELY, COMPRESSORS, REFRIGERATORS, AND FANS; ELECTRIC CLUTCHES ; ELECTRIC BRAKES; VOLTAGE CONTROLS; AND ELECTRIC VALVES-TO-WIT, OVERRUNNING POWER-TRANSMISSION CLUTCHES

NON-ELECTRIC VALVES-TO-WIT, OVERRUNNING POWER-TRANSMISSION CLUTCHES