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Heat Regulators, Automatic Simplex Heat Regulator Company, Inc. 2938 Pillsbury Avenue, Minneapolis, Minnesota PRODUCTS--Thermostats complete with Motors, for all types of Warm Air, Hot Water, or Steam Heating Systems, and also for Hot Water Supply Systems, whether equipped with Oil, Coal, or Gas Furnaces. Separate Items Include Thermostats, with or without clocks; Hydrostats; Electric Motors; Spring Motors; Gravity Motors. THERMOSTATS ELECTRIC MOTOR The Simplex Electric Motor has been designed primarily Every Simplex for heat regulator use. Great care has been taken to insure thermostat is equip ped with a large and very sensitive coil of thermostatic metal, the expansion or con traction of which acta on an extremely simple and direct mechanism, with platinum contact points, making circuit with the No. SO Simplex motor. Regulation ia Room Thermoetai accurate to within 1 deg. fahr. variation. A11 thermostats are equipped withthe finest grade thermometers, which are given a quadruple test to insure absolute strength, con venience, and reliability. Ex haustive testa of six weeks con tinuous running, night and day, without lubrication,bavesbown' no overheating or loss of efficiency. (Equal to 50 years service opera ting 10 times a day). This motor is built throughoutof the finest materials, andisassem bled in adustanddampproof aluminum housing. Arranged for.mounting horixon- correlationbetweenthe thermostatic coil tally on shelf or vertically on wall, with basement switch and thermometer. The standard finish is blast bronse, which is durable and attractive, blending well with any Ho. SI Simplex Room Thermostat intEeqriuoirpdpeecdorwatiitohn. high-grade clock which automatically conveniently placed in either case. The Simplex SPRING MOTOR raises the temperature to tbe desired degree at any pro- Spring Motor determined hour. derives its hydrostats power from a Simplex hydro- heavy duty stats are equipped steel spring, with sensitive ther which operates mostatic coils, work- thelever arms ing through a through balanced mechanism bronze reduc- . with dial indicators. tion gears. It Regulation is accu is provided rate to 1 deg. fahr. with base Made in tube and ment switch, winding flush types for regu indicator, and safety lation of temperature switchtoinsurefurnace' on boilers, furnaces, -drafts being closed on and closed or open the last operation. hot water supply Assembled in a gal tanks. Also used in Dual Control with vanised steel case, black enameled and any Simplex ther absolutely rust-proof. mostat. SPECIFICATIONS--Temperature Control Furnish and install in a neat and workmanlike manner complete Simplex Temperature Control for the heating plant and domestic hot water supply system herein specified. Locate thermostat for heating plant at point designated by architect and owner,and leave the entiremechanism inperfect performing order.' Furnish owner with letter of guarantee. Units together with all necessary appurtenances, connec tions, controls, etc., to be furnished with this installation, are: ' No. 30 Thermostat j Select one One i No. 31 Thermostat with Clock { Model If desired with Dual-Control or for Hot Water Supply. One Simplex Hydrostat (New Simplex Electric Motor ) Simplex Spring Motor [ ,,,, gravity motor Simplex .Gravity Motor operates by an iron weight on Miain 'Fan governor provides smooth and silent operation, and a safety stop prevents furnace drafts being left open on last operation. Assembled same as Spring Motor Unit. Simplex Gravity Motor J Model All installed according to Manufacturer's instructions, installation charts and drawings. ONnotdeo:--meOsaticDhuoatl-wCaotnetrrosl,upbpolythsythsetermmso,staatsianngdle hmydortoorstwaitl,looppeerraattee obnotahsdinragflet omnohteoar.ter and valve on steam supply. CATALOG--Notice to the Profession and Trade Please write for copy of our general catalog, describing equipment and typical installations. 646 Values . The Dole Valve Company 1913-1933 Carroll Avenue, CHICAGO, ILL. Manufacturers of High Grade Radiator Valves and Brass Specialties (I1VENT1NG SEAT THE DOLE SYPHON AIR VALVE (71VALVE CASING (non adjustable, automatic) For venting low pressure steam radia (2)SEATING PIN tors. Fully guaranteed for five years. It has the Venting Seat (1) of heavy con struction, threaded and brazed into the valve casing. The Seating Pin (2). of finely machined hard metal is hydraulically WINNER CHAMBER pressed to a perfect radius, while the OF FLOAT Float (3) is of light but strong annealed brass, which rises when water enters the (5) DIAPHRAGM valve, positively preventing leakage. The Inner Chamber of Float (4) contains the (6)FLOAT REST proper amount of thermostatic liquid which forms a powerful gas when steam comes in contact with the float, thus the diaphragm is expanded and the valve closed against the escape of either steam or water. The Diaphragm (5) is made from special rugated. The Float Rest (6) is one J sides to permit water to drain (7) of beautiful dodecagon design, presents an attractive exterior and inside the valve. The Base (8) of heavy drawn brass threaded on the interior casing is firmly brazed to insure great strength and durability. The Connecting Nipple .(9)--one piece of extra heavy drawn brass has ^ in. standard iron pipe thread, which conforms to the requirements of all radiators. A Syphon Lock Collar (10) made from extra heavy brass firmly brazed to the syphon prevents either accidental or intentional removal of the syphon from the valve. (Note, the valve can be removed from the radiator without the syphon becoming detached). The Syphon (11)--one piece of annealed brass-tubing, is perfectly formed to fit inside the radiator column. Assembled into the.valve free from obstruction, thus preventing interference when the valve is attached to the radiator. Regarding the finish, the entire valve is .finely nickel plated, of an artistic design and highly polished. A real "beauty" and it works. * List Price.......................................................................$1.50 THE DOLE STRAIGHT SHANK QUICK VENT AIR VALVE For quick venting the ends of steam mains, specially useful for venting hot water generators and low pressure feed water heaters where a straight shank valve is required. Made from similar material, constructed in like manner and operates on the same principle as the Dole Syphon Air Valve. Made in three sizes--1/ and % in. List Price $2.00 and the % in.-List Price $3.00. 647 to me