Document OwK7oqY8DKg87ND0yoXbr6gj

Johnson Service Company Temperature Control Equipment Specific Applications of Temperature Control Bake ovens for enamels, japans, etc. Core drying ovens. Drying room for paint, varnish, patent leather, etc. Storage room for tobacco, rubber or similar goods. Cold storage rooms, fur vaults, etc. Canning machinery, cookers, exhaus ters, processors. Corn and oats drying apparatus. Fruit drying apparatus. Johnson Positive Acting Metal Diaphragm Thermostat The only thermostat on the market provided with positive snap action for closing and opening the radiator valve quickly, positively and fully, which is necessary with steam heat. Indicator and Cut-off It is the only ther mostat having an indicator which will show at a glance whether the thermo stat has the heat turned on or off. A cut-off is provided for shutting the heat off permanently when desired. Johnson Gradu ated Acting Ther mostat This thermostat is ideal for controlling mixing dampers ad mitting hot and tem pered air to the room in which the thermo stat is located. The graduated action con sists in automatically maintaining the hot and tempered air blades of the mixing damper at just the Model Positive Metal Diaphragm Thermostat right relative position to deliver a mixture of air that will keep the rooms at a uni form temperature. When the tempera ture reaches the point at which the thermo stat is set to operate, it will hold the mix ing dampers in an intermediate position^ Thermostat Covers The covers which conceal the thermostat proper are small, incon spicuous and very neat in design and workmanship. There are two distinct styles: one called the R typeandone^giled the P type. *" The R type is a die-casting, very beautifully de signed and used generally in resi dences and other handsomely dec orated buildings. Model R. /. Cover 4)4"x2"xl)i" deep The P type is a pressed metal cover, very finely finished but not as ornamental and artistic as the R cover, and used more generally in schools, office buildings, hospitals and places where simple and neat design is desired rather than artistic and ornamental. Johnson Pneumatic Insertion Thermostat Designed to control temperatures with in closed air chambers or ducts. The body of thermostat is a dust-proof case containing the two working parts and extending outside the chamber. 424 * -..r-v-,yTr,7vr-'::< Johnson Service Company Temperature Control Equipment This thermostat is Multiple Insertion Thermostat made either positive or graduated acting. Similar to the insertion duct thermo stat, excepting that one multiple thermo Applications Adaptable for use in bake ovens for enamels, japans, etc.; drying rooms for paints, varnishes, patent leather, etc.; storage rooms for tobacco, rubber or similar goods; ster ilizers or pasteur- izers; cold storage rooms, fur vaults, etc.; refrigerator machine control; hu Pneumatic Insertion Thermostat midity control for air washers; flue gas temperature con trol; hot blast heating plants; combi nation tempered ventilation and hot blast systems; greenhouses, turkish bath rooms, etc.; tempered ventilation for buildings. stat takes the place of a number of sepa- rate duct thermostats set for dif ferent tem peratures. The 4-point multiple thermostat shown will operate four separate dia- ph r ag m valves at as many differ ent tempera tures. It has Multiple Insertion Thermostat become very popular with heating engi neers for the control of heating and tempering coils where it is desired to have these coils turn on at different temperatures. It is made to work with positive action when controlling valves; with graduated action when controlling Johnson Calibrated Thermostat dampers; or-with both positive and graduated action when controlling valves This is an especially high grade insertion and dampers..^ thermostat for use where it is desired to change frequently the adjustment to op Thermostat erate at different temperatures. It is operated by compressed air at 15 lb. per sq. in., and used to control temperatures of liquids and air by automatically open ing and closing a diaphragm valve or damper. Graduations made to meet re quirements, limited to a total range of 60 deg. Designed for insertion through 1-in. tapped hole in tank and controlling, in the case of hot water tanks, a diaphragm valve on the supply pipe to the steam coils in the tank. It can be used to control the temperature of any liquid, either hot or cold. It is especially adaptable for con trolling the temperature of water in hot 425