21 QUARTZ OSCILLATORS WITHOUT THERMOSTATS; TIME DISTRIBUTION UNITS-NAMELY, APPARAUS RELATED TO TIME DISTRIBUTION FOR USE IN FACTORIES, HOSPITALS, RAILWAY STATIONS, LABORATORIES AND OFFICES INCLUDING ONE OR MORE QUARTZ CLOCKS, FREQUENCY DIVISION CIRCUITRY AND OUTPUT AMPLIFIERS DELIVERING ELECTRICAL PULSES AT INTERVALS AND ACTUATING, BY MEANS OF A DISTRIBUTION NETWORK, A NUMBER OF SLAVE CLOCKS LOCATED FOR EXAMPLE IN THE DIFFERENT ROOMS OF A BUILDING (OFFICES, FACTORIES, HOSPITALS, ETC.); ADDITIONAL CIRCUITRY MAY BE INCLUDED IN ORDER TO GIVE SPECIAL TIME SIGNALS FOR BROADCASTING STATIONS, OUTPUT FREQUENCIES USED TO DRIVE SYNCHRONOUS INSTRUMENTS OR CLOCKS, AND FACILITIES FOR THE COMPARISON OF THE LOCAL TIME WITH RESPECT TO OTHER TIME SOURCES; TIME SIGNAL RECEIVERS INCLUDING A RADIO RECEIVER OF A SPECIAL DESIGN, TUNED TO FREQUENCIES ON WHICH TIME SIGNALS ARE BROADCAST; THE OUTPUT MAY BE TO A LOUDSPEAKER, BUT MORE GENERALLY MAY BE AN ELECTRIC PULSE TO ACTUATE A RELAY CONTACT; THIS INSTRUMENT IS FOR THE CALIBRATION OF THE LOCAL TIME (QUARTZ CLOCK, ATOMIC CLOCK, ETC.) WITH RESPECT TO STANDARD TIME GIVEN BY BROADCASTING STATIONS; PROXIMITY DETECTORS FOR DETECTING THE PRESENCE OF A METAL PART WITHOUT CONTACT BY VARIATION OF THE MAGNETIC PROPERTIES OF A CAPTOR OR SENSING COIL; PIEZOELECTRIC QUARTZ; PHOTOELECTRIC DETECTORS OR SENSORS INCLUDING A LIGHT SOURCE AND A PHOTOELECTRIC CELL PICKING UP A BEAM TRANSMITTED OR REFLECTED AND INTERRUPTED BY THE OBJECT TO BE DETECTED; LOGICAL ELEMENTS INCLUDING ELECTRONIC CIRCUITS PERFORMING LOGICAL OPERATIONS AS USUALLY EFFECTED BY ELECTROMECHANICAL RELAYS AND USED FOR THE ELECTRONIC CONTROL OF MACHINE TOOLS AND INDUSTRIAL PROCESSES; ELECTRONIC PROGRAMMATORS-NAMELY, APPARATUS FOR AUTOMATICALLY CONTROLLING MACHINE TOOLS BY MEANS OF ELECTRONIC TIMING CIRCUITS INVOLVING A PREDETERMINED SEQUENCE OF OPERATIONS
Trademark: 72266183
