Document mqLBdyG6rd7jL2Y7VwEe3Dqn0

Controls and Instruments Johnson Service Company Controls and Instruments !' Johnson Service Company AUTOMATIC TEMPERATURE AND AIR CONDITIONING CONTROL General Offices and Factory Milwaukee, Wis. ' Branch Offices in all Large Cities Johnson Temperature Regulating Co. of Canada, Ltd., 113 Simcob St., Toronto. Ont. Halifax, N. S. Montreal, Qub. Winnipeg, Man. Calgary, Alta. Vancouver, B. C. PRODUCTS AND SERVICES Manufacturers, Engineers, and Contractors--For automatic temperature and humidity control systems applied to all types of heating, cooling, ventilating, and air conditioning installations. , Space Control--Automatic control of room temperatures and humidities, applied to radiators, unit ventilators, unit heaters, and heat delivery ducts. Johnson "Duo-Stats" to maintain the proper relationship between outdoor and heating system temperatures for groups of radiators, or " heating zones." A complete line of devices for automatic control of air conditioning systems, heating, cooling, humidifying, dehumidifying. Process Control--Automatic temperature and humidity control devices for manufacturing and industrial processing, applied to tanks, dryers, vats, kettles, curing rooms, coolers, kilns, etc. Nation-wide Service--Johnson sales engineers, technicians, and trained installation men are available at all branch offices. None of the men in the nation-wide Johnson organization are agents, jobbers, or part-time representatives. All are salaried employees, devoting their entire efforts to the interests of the Johnson Service Company and its customers. Send for Bulletins describing the detailed characteristics of any of the Johnson devices. JOHNSON THERMOSTATS Room Thermostats--Intermediate (gradual) or positive (snap) action, maintaining temperatures accurately within one degree above or below point of setting. "Dual" (two-temperature) and "SummerWinter" types, as well as standard instruments. Various types of covers allow wide selection of adjusting features, guards, and method of mounting. Red-reading thermometers with magnifying tube attached to each cover. Insertion and Immersion Thermostats--Control temperatures in ducts, tanks, and similar locations. High grade insertion or immersion thermometers for mounting adjacent to the thermostats, including the distinctive Johnson insertion thermometer, with red-reading mercury column in heavy lens glass tube and 9-in. scale with patented adjust able tilting feature. Also, separable socket liquid thermometers. Extended Tube Thermostats--Liquid-filled or vapor tension type, to measure temperatures at a point remote from the location of the operating mechanism. Various types of bulbs. Connecting tubing up to 50 ft in length for vapor tension. Special Thermostats--For applications encountered in industrial control, including the " Record-O-Stat," combination extended-tube temperature controller and recorder. Full 10-in. chart. Single or duplex type, the latter controlling and recording both wet and dry bulb temperatures. Remotely Adjusted Thermostats--A distinctive Johnson feature, applied to various types of instruments where readjustment must be accomplished from a remote point, such as another thermostat or a manual switch. Johnson Sensitivity Adjustment--An important development in automatic temperature and humidity control for air conditioning. A unique and convenient means of adjusting the sensitivity of Johnson thermostats and humidostats, on the job, balancing "time-lag" with respect to the capacity of conditioning apparatus. "Hunting" and temperature fluctuation prevented. Available on all Johnson gradual action insertion and immersion thermostats, insertion humidostats, and certain room type thermostats and humidostats. 1014 Single Room Thermostat Dual Room Thermostat Room Humidostat "Sylphon" Radiator Valve * I <>' I Extended Tube Thermostat Remotely Adjusted Duct Thermostat Modulating Attachment for Expansion Valves JOHNSON HUMIDITY CONTROL Johnson Humidostats--Automatically control the supply of moisture delivered by a humidifier or by other means, maintaining a constant percentage of relative humidity. Available in both room and insertion patterns and with various types of elements as determined by requirements, the most sensitive controlling within 1 per cent at relative humidities as high as 95 per cent at 100 F. Humidostatic elements are wood-strip, human hair, animal membrane, or other suitable substances as selected. Johnson Humidifiers--"Steam grid" type (perforated pipe supplied with low pressure steam) or pan type with copper evaporating pan, brass heating coils, and float control. JOHNSON VALVES Johnson Diaphragm Valves--Simple and rugged. Seamless metal bellows and heavy spring operate the valve stem. Avail able, if desired, with diaphragms of special molded rubber, resistant to aging, heat deterioration and oxidation. No complicated moving parts. Made in all standard sizes and patterns. Direct acting (normally open) or reverse acting (normally closed). Also, three-way mixing and by-pass valves. For steam, water, brine, and freon. Johnson "Streamline" Diaphragm Valves--Modulating discs and special internal construction, insure superior gradual control . . . Where maximum power is required for repositioning at the slightest demand of controlling instruments, Johnson molded rubber diaphragm valves are fitted with Johnson's dependable pilot feature, for smooth gradual operation, inde pendent of friction and pressure variations. JOHNSON DAMPERS AND SWITCHES Standard Johnson Dampers--Steel. blades in flat steel frames with adequate bracing to form a rigid assembly. Finished in two coats of black lacquer. Special corrosion-resisting finishes on order. Angle iron frames optional. Special Dampers-- Galvanized iron, monel metal, aluminum, copper, rust-resisting steel, etc. Brass pins in steel bearings or ball bearings. Johnson Damper Motors--In principle, similar to valves. Seamless metal or specially molded rubber diaphragm operates damper through suitable linkage. Various types of brackets. Distinctive Johnson " Piston-type" damper motors afford long travel at full power, a feature not found in other such devices. With or without pilot mechanism, as described above under "Valves." Johnson Pneumatic Switches--Various patterns for oper ation of dampers and for placing thermostats and other devices in and out of service, as required, from remote points. Standard switchboards are oiled slate. Ebony asbestos, polished oak, and genuine or imitation marble on order. Piston Type Damper Motor Rubber Diaphragm Coil Valve Louvered Damper 1015 Johnson "Duo-Stai "