. Reliable vacuum and vacu-vapor heating equipment . stem the No. IllPump has occasion to operate but seldom, and as themotor is only % horse power, the cost for electric currentis exceptionally low. Gears. The large gear acts as a combined fly wheel andgear; insures steady operation; and prevents wear andstrain on motor. The motor gear is made of rawhide,which is more durable than brass or steel. The gearshave spiral teeth—3 teeth in each gear are always in con-tact, assuring smooth operation. Pistons are grey iron, packed with three rings of packing,and have compensating springs, which autom
. Reliable vacuum and vacu-vapor heating equipment . stem the No. IllPump has occasion to operate but seldom, and as themotor is only % horse power, the cost for electric currentis exceptionally low. Gears. The large gear acts as a combined fly wheel andgear; insures steady operation; and prevents wear andstrain on motor. The motor gear is made of rawhide,which is more durable than brass or steel. The gearshave spiral teeth—3 teeth in each gear are always in con-tact, assuring smooth operation. Pistons are grey iron, packed with three rings of packing,and have compensating springs, which automaticallytake up wear in the packing. Valves are readily accessible. The removable valve seatsare bronze. The main shaft bearings and pinions arephosphor bronze. Base is heavy iron, cast in one piece. Lubrication. All bearings have large grease cups, whichrequire only occasional filling. See page 77 for specifications and dimensions ofthis Electric Pump Fifteen THE RELIABLE AIR LINE RELIABLE AIR LINEELECTRIC VACUUM PUMPS Nos. 112, 113, 114 and 115. See page 11 for list of equipment included with these pumps NOTE THE SIMPLICITY The RELIABLE Electric Vacuum Pumps areautomatic and noiseless, and draw air continuouslywhen in operation. With their double speed re-duction, they work slowly and evenly, and usebut i to i the power required to operate othervacuum pumps. The cost for current is lower inproportion. See next page for complete description Sixteen VACUUM HEATING EQUIPMENT DESCRIPTION OF RELIABLE AIR LINE ELECTRICVACUUM PUMPS Nos. 112, 113, 114 and 115 The RELIABLE Pumps are simple in design and dur-ably constructed, and can always be depended on tooperate satisfactorily, year in and year out. Following is a detailed description: Cylinders. These pumps have two vertical, single-actingcylinders, which always draw air steadily when in opera-tion. The cylinders are heavy iron. Large Capacity. The Pumps have unusually large capacitybee page 77 for number square feet radiation ea
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