LEEDS & NORTHRUP COMPANY

Description: Sensors for determining properties of liquid metal such as temperature, gas, and/or carbon; and instrumentation; samplers made of metal for sampling liquid metal

Description: Devices and operating software and software which creates display screens for sensing, measuring, controlling, recording and analyzing variables within industrial, food, pharmaceutical, electric power, water utility and related processes

Description: Particle size analyzer

Description: Controlled flow-through module of pipes and valves used for the purpose of automatically cleaning and/or calibrating electrodes located in the module or in a container

Description: PH METERS; "PH"

Description: Electrically Operated Digital Indicators for Sequentially Indicating the Magnitude of a Plurality of Electrical Input Signals and Producing Alarm Indications When a Signal Exceeds a Preset Level for Use in the Power Generation, Chemical Processing, Manufacturing, and Fabrication of Materials Industries

Description: THERMOANALYTIC APPARATUS USED TO COMPUTE AND DISPLAY CARBON, CARBON EQUIVALENT, SILICON, AND TEMPERATURE OF A SAMPLE OF MOLTEN IRON

Description: DIGITAL RESIN MELT POINT TESTER FOR RESIN COATED SAND

Description: SINGLE AND MULTIPOINT DIGITAL MEASURING, INDICATING, ALARMING AND PRINTING INSTRUMENTS

Description: INDUSTRIAL PROCESS CONTROL APPARATUS AND SYSTEMS-NAMELY, AUTOMATIC, MANUAL, AND COMPUTER-COMPATIBLE PROCESS CONTROLLERS; TRANSMITTERS OF PRESSURE, AND DIFFERENTIAL PRESSURE; AND SIGNAL CONDITIONERS

Description: VOLUMETRIC DRY FEEDERS AND WEIGHERS

Description: APPARATUS FOR INDICATING THE SILICON CONTENT OF METALS

Description: ENCLOSING ENVELOPES FOR HEAT-RESPONSIVE ELEMENTS OF ELECTRICAL PYROMETERS

Description: CHEMICAL APPARATUS-NAMELY, VESSELS THAT RECEIVE BOTH SLUDGE AND A CHEMICAL OXIDIZING AGENT TO PROMOTE THE OXIDATION OF THE SLUDGE DURING A WASTE TREATMENT PROCESS

Description: SILICON DETERMINATOR INCLUDING A PROBE ASSEMBLY FOR DETERMINING THE SILICON CONTENT OF METALS

Description: CURVE-FOLLOWING PROGRAMMER FOR AUTOMATICALLY CHANGING THE POSITION OF A SERVO-DRIVEN SHAFT IN ACCORDANCE WITH A PLOTTED CURVE

Description: RECORDER FOR PLOTTING CURVES ON INDIVIDUAL CARDS

Description: IMMERSION MOLTEN METAL SAMPLER FOR OBTAINING A SAMPLE OF MOLTEN MATERIAL AT A SUBSURFACE LEVEL OF A MOLTEN BATH

Description: TESTING EQUIPMENT-NAMELY, MOLTEN METAL SAMPLER

Description: RADIATION PYROMETER

Description: ELECTRICAL MEASURING AND CONTROL INSTRUMENTS-NAMELY, INDICATORS AND INDICATING CONTROLLERS, OF THE DEFLECTION TYPE FOR INDICATING THE MAGNITUDE OF PHYSICAL QUANTITIES SUCH AS TEMPERATURE, PRESSURE, FLOW, STRESS, ELECTRICAL CHARACTERISTICS, SMOKE DENSITY, ETC. THAT MAY BE REPRESENTED BY VARYING ELECTRICAL SIGNALS AND FOR CONTROL OF SAID MAGNITUDES

Description: SELECTOR SWITCH FOR MULTIPOINT RECORDERS

Description: ELECTRICAL INSTRUMENTS, SYSTEMS, AND COMPONENTS-NAMELY, THERMAL TRANSDUCERS AND SENSORS, CALORIMETERS, RADIOMETERS, RESISTANCE TEMPERATURE SENSORS, TEMPERATURE CONTROLLERS, THERMAL INSTRUMENTATION SYSTEMS, AND TEST STRUCTURES CONNECTED THEREWITH

Description: PRESSURE CONNECTORS USEFUL IN FABRICATING THERMOCOUPLES

Description: ELECTRIC CONTROL SYSTEMS-NAMELY, MEASURING AND CONTROL APPARATUS FOR PHYSICAL, CHEMICAL, MECHANICAL, OR ELECTRICAL CONDITIONS SUCH AS TEMPERATURE, PRESSURE, PH, CONDUCTIVITY, OR ELECTROMOTIVE FORCE WITH TIMING DEVICES FOR PROVIDING CONTROL OF A CONDITION VARYING OUTPUT

Description: PRINTING UNIT FOR MULTIPOINT RECORDERS FOR RECORDING THE MAGNITUDES OF PHYSICAL QUANTITIES THAT MAY BE REPRESENTED BY VARYING ELECTRICAL SIGNALS

Description: Electrical Testing Device for Expendable Immersion Thermocouple Temperature Measuring Apparatus

Description: Electrical Measuring Instruments of the Indicating and/or Recording Type the Electrical Ranges of which can Be Varied at Will by the User for Measuring Any Physical Quantity or Transducer Output that can Be Measured in Terms of D.C. Voltage

Description: Apparatus and Systems for Measurement of Temperature Using a Moving Pyrometer Detector

Description: ELECTRICAL SYSTEMS OR APPARATUS FOR DETERMINING AND/OR CONTROLLING THE CONSTITUENT POTENTIAL OF GASES AND PARTICULARLY TO ELECTRICAL APPARATUS FOR CONTROLLING THE ATMOSPHERE OF FURNACES SUCH AS USED IN THE CARBURIZING OR NITRIDING OF METAL BY VARYING THE SUPPLY OF ONE OR MORE CONSTITUENTS OF THAT ATMOSPHERE OR FOR MEASURING THE CARBURIZING OR NITRIDING POTENTIAL OF THAT ATMOSPHERE

Description: ROTARY TYPE INTEGRATING FLOW METERS FOR STEAM, AIR AND GAS, AND ACCESSORIES THEREFOR; NAMELY, LIQUID LEVEL GAUGE GLASS, TRANSMITTER, REMOTE TOTALIZER, FLOW RATE INDICATOR, FLOW RATE RECORDER, FLOW DEMAND INDICATOR AND FLOW DEMAND RECORDER

Description: AUTOMATIC, ELECTRICALLY OPERATED CONTROLLING, INDICATING AND SIGNALLING APPARATUS FUNCTIONING RESPONSIVELY TO THE FLUCTUATIONS OF A VARYING MAGNITUDE OF A CONDITION SUCH AS TEMPERATURE, PRESSURE, ELECTRICAL CONDUCTIVITY, ELECTRICAL IMPEDANCE, ELECTRIC CURRENT, ELECTRIC VOLTAGE, OR THE LIKE, FOR USE IN CONNECTION WITH INDUSTRIAL EQUIPMENT AND APPARATUS SUCH AS DRIERS, OVENS, FURNACES, HEATERS, BATHS, POTS, KETTLES, STILLS, DIES, PLATENS, PRESSES OR THE LIKE, FOR THE PURPOSE OF INCREASING, DECREASING, AND MAINTAINING AT A PREDETERMINED MAGNITUDE THE VARIABLE CONDITION ENCOUNTERED IN CARRYING OUT OF INDUSTRIAL PROCESSES WHERE THE VARIABLE MAGNITUDE OF THE CONDITION IS TO BE MAINTAINED WITHIN PREDETERMINED OPERATING LIMITS, AND FOR PARTS OF AND ACCESSORIES FOR SUCH APPARATUS, CONTROLLERS, AND CONTROLLERS COMBINED WITH SIGNALING MEANS

Description: TRADE JOURNAL OR PUBLICATION PUBLISHED AT IRREGULAR INTERVALS

Description: ELECTRICAL PYROMETERS, ELECTRICAL THERMOMETERS, ELECTRICAL RESISTANCE ELEMENTS FOR ELECTRO-PYROMETERS AND THERMOMETERS, AND HOUSINGS AND ATTACHMENTS THEREFOR, AND ELECTRICAL RESISTANCE ELEMENTS FOR DETECTORS OF TEMPERATURE, HEAT, AND HUMIDITY

Description: AUTOMATIC ELECTRICAL MEASURING INSTRUMENTS, AUTOMATIC ELECTRICAL RECORDERS AND CONTROLLERS, AND COMBINED AUTOMATIC ELECTRICAL RECORDERS AND CONTROLLERS, FOR MEASURING, RECORDING, AND CONTROLLING VARIATIONS IN MAGNITUDE OF PHYSICAL, CHEMICAL, MECHANICAL AND ELECTRICAL CONDITIONS AND FORCES, SUCH AS TEMPERATURE, ELECTROMOTIVE FORCE, IMPEDANCE, CURRENT, AND THE LIKE

Description: HIGH SENSITIVITY HIGH SPEED RECORDERS OF MAGNITUDES OF TEMPERATURE, HUMIDITY, FREQUENCY, SPEED, PRESSURE, CONDUCTIVITY, ION CONCENTRATION, RATE OF FLOW OF FLUIDS, ELECTRIC CURRENT, ELECTRICAL IMPEDANCE, ELECTRICAL POTENTIALS AND VOLTAGES, [ TURBIDITY, PHOTO ELECTRIC EFFECTS, ] AND COMPOSITION OF MIXTURES; RECORDERS CONTROLLED BY A MEMBER DEFLECTING IN RESPONSE TO THE MAGNITUDE OR CHANGES IN MAGNITUDE TO BE RECORDED; HIGH SENSITIVITY ELECTRIC CONTROLLERS AND REGULATORS OF TEMPERATURE, HUMIDITY, CONDUCTIVITY OF FLUIDS, ION CONCENTRATION, COMBUSTION, RATE OF FLOW AND PRESSURE OF FLUIDS, COMPOSITION OF MIXTURES, ELECTRIC CIRCUITS, ELECTRIC CURRENTS, ELECTRO-MOTIVE FORCES,AND ELECTRICAL IMPEDANCES; FOR ELECTRIC CONTROLLERS OF STEAM GENERATOR FURNACES AND FOR ELECTRIC CONTROLLERS OF STEAM GENERATION; FOR ELECTRIC CONTROLLERS, REGULATORS, AND GOVERNORS OF SPEED AND FREQUENCY; AND FOR ELECTRIC CONTROLLERS AND REGULATORS OF FREQUENCY OF ELECTRIC AND MECHANICAL VIBRATION

Description: ELECTRICAL MEASURING INSTRUMENTS-NAMELY, ELECTRIC METERS AND INDICATORS, GALVANOMETERS, VOLTMETERS, AMMETERS, WHEATSTONE BRIDGES, POTENTIOMETERS, [ PERMEAMETERS, ] INDUCTANCE AND CAPACITY BRIDGES, INDUCTOMETERS, ELECTRIC TESTING SETS, ELECTRIC DECADE SETS, RESISTANCE STANDARDS, INDUCTANCE STANDARDS, CAPACITY STANDARDS, STANDARD CELLS, THERMOCOUPLES, ELECTRIC THERMOMETERS, RESISTANCE THERMOMETERS, PHOTOMETERS, PYROMETERS, CONDUCTIVITY CELLS, ION-CONCENTRATION CELLS; INSTRUMENTS FOR MEASURING AND INDICATING CONDUCTIVITY OF ELECTROLYTES, ION CONCENTRATION, FLOW OF FLUIDS, SPEED, FREQUENCY, AND COMPOSITION OF MIXTURES; GAS ANALYZERS; RECORDERS OF MAGNITUDES OF TEMPERATURE, HUMIDITY, FREQUENCY, SPEED, PRESSURE, CONDUCTIVITY, ION CONCENTRATION, RATE OF FLOW OF FLUIDS, ELECTRIC CURRENT, ELECTRICAL POTENTIALS, ELECTRICAL IMPEDANCE, [ TURBIDITY, ] PHOTO-ELECTRIC EFFECTS, AND COMPOSITION OF MIXTURES; AND RECORDING INSTRUMENTS CONTROLLED BY A MEMBER DEFLECTING IN RESPONSE TO THE MAGNITUDE TO BE RECORDED

Description: [ ELECTRIC FURNACES, OVENS, AND HEATERS; FOR RESISTORS AND ELECTRIC HEATING UNITS FOR FURNACES, OVENS AND HEATERS; FOR ] ELECTRIC CONTROLLERS AND REGULATORS OF TEMPERATURE, HUMIDITY, ION CONCENTRATION, CONDUCTIVITY OF FLUIDS, COMBUSTION, RATE OF FLOW AND PRESSURE OF FLUIDS, COMPOSITION OF MIXTURES, ELECTRIC CIRCUITS, ELECTROMOTIVE FORCES, ELECTRIC CURRENTS, AND ELECTRIC IMPEDANCES; FOR ELECTRIC CONTROLLERS OF STEAM-GENERATOR FURNACES, FOR ELECTRIC CONTROLLERS OF STEAM-GENERATION, FOR RHEOSTATS, RESISTORS, ELECTRIC HEATING UNITS, ELECTRIC SWITCHES, IMPEDANCES, SOURCES OF CURRENT, AND ELECTRIC MOTORS; FOR ELECTRIC CONTROLLERS REGULATORS AND GOVERNORS OF SPEED AND FREQUENCY; FOR ELECTRIC CONTROLLERS AND REGULATORS OF FREQUENCY OF ELECTRICAL AND MECHANICAL VIBRATION [ ; AND FOR ELECTRICAL SYNCHRONIZERS ]

Description: Electrical apparatus for measuring thermodynamic properties of gases

Description: Environment-responsive electrical apparatus, namely sensors for sensing or communicating information concerning temperature, humidity, air quality, and the like

Description: Electronic testing device which tests the measuring equipment which measures properties of molten metal

Description: TESTING EQUIPMENT-NAMELY, MOLTEN METAL SAMPLER

Description: Expendable Immersion Thermocouple Suitable for Repeated Immersions

Description: VACUUM HEAT TREATING FURNACE

Description: PARTICLE SIZE MONITOR

Description: PH ELECTRODES

Description: EXPENDABLE IMMERSION APPARATUS FOR THE MEASUREMENT OF THE TEMPERATURE OF MOLTEN METAL INTO WHICH THE UNIT IS IMMERSED AND OF THE TEMPERATURE OF A SAMPLE OF THE MOLTEN METAL AS THE SAMPLE COOLS

Description: EXPENDABLE IMMERSION UNIT FOR THE DETERMINATION OF THE OXYGEN CONTENT OF A MOLTEN METAL INTO WHICH THE UNIT IS IMMERSED

Description: IMMERSION THERMOCOUPLES

Description: Apparatus for Measurement of Temperature and Accessories Therefor, Particularly Pyrometers for Measuring the Temperature of Molten Metal as It Cools, and Expendable Measuring Units Therefor

Description: Systems for Controlling the Production of Electric Power in which Boiler Inputs Are Adjusted in Accordance with Electric Power Requirements

Description: Thermocouple Unit Designed to Be Discarded After Use for a Single Temperature Measurement

Description: ELECTRICALLY-CONTROLLED HEATTREATING FURNACES FOR HOMOGENEOUS CARBURIZING, CONTROLLED CASE CARBURIZING, CARBON RESTORATION, HARDENING OR CARBONITRIDING AND ELECTRIC CONTROL APPARATUS FOR APPLICATION THERETO

Description: ELECTRIC FURNACES AND OVENS, ELECTRIC HEAT-TREATING FURNACES AND OVENS, AND REAGENT-TREATING RETORTS, FOR CASE-FORMING CARBURIZATION AND FOR PREVENTION OF DECARBURIZATION OF FERROUS METALS, STEELS, AND ALLOYS; AND FOR PARTS AND ACCESSORIES OF AND FOR THE AFORESAID FURNACES, OVENS, AND RETORTS

Description: REAGENTS, REAGENT MIXTURES, OXYGEN-CONTAINING HYDROCARBONS FUSEL OIL, FOR USE IN CARBURIZATION AND PREVENTION OF DECARBURIZATION OF FERROUS METALS, STEELS, AND ALLOYS

Description: PYROMETERS AND RADIATION PYROMETERS

Description: REAGENTS, REAGENT MIXTURES, OXYGEN-CONTAINING HYDROCARBONS, DIETHYLENEGLYCOLMONOETHYLETHER, FOR USE IN CASE-FORMING CARBURIZATION OF FERROUS METALS, STEELS, AND ALLOYS

Description: ELECTRIC FURNACES, ELECTRIC OVENS, AND ELECTRIC HEAT-TREATING FURNACES, WORK CONTAINERS AND ELECTRIC HEATING UNITS FOR ELECTRIC FURNACES, ELECTRIC OVENS AND ELECTRIC HEAT-TREATING FURNACES; CONTROL PANELS AND MANUALLY AND PYROMETRICALLY AND GALNOMETRICALLY CONTROLLED ELECTIC SWITCHES RHEOSTATS, AND HEATING-CURRENT CONTROLLERS FOR REGULATING OR CONTROLLING THE TEMPERATURE OR OPERATING CONDITIONS OF ELECTRIC FURNACES, ELECTRIC OVENS, AND ELECTRIC HEAT-TREATING FURNACES