Stationary steam engines, simple and compound; especially as adapted to electric lighting purposes . ction of having aprime motor, which is not likely during their business livesto give them any trouble, is more than a compensation forany possible saving in dollars and cents to be effectedby the adoption of the higher velocities of piston and ofcrank-shaft rotation. THE WHEELOCK ENGINE is an ingeniously arranged engine of the class consideredin this division of the subject. Its form is seen in the accompanying engravings. The steam chest is placed below the cylinder and thesteam and exhaust va
Stationary steam engines, simple and compound; especially as adapted to electric lighting purposes . ction of having aprime motor, which is not likely during their business livesto give them any trouble, is more than a compensation forany possible saving in dollars and cents to be effectedby the adoption of the higher velocities of piston and ofcrank-shaft rotation. THE WHEELOCK ENGINE is an ingeniously arranged engine of the class consideredin this division of the subject. Its form is seen in the accompanying engravings. The steam chest is placed below the cylinder and thesteam and exhaust valves are set side by side, the latterserving both as induction and eduction valve, and havingthe same action, nearly, as the common three ported slidevalve, while the function of the former is principally that ofa cut-off valve. The latter, or main valve, is set nearest theend of the cylinder and the exhaust steam is thus permittedto escape directly and promptly from the engine. Thevalves are coned, slightly, and may be adjusted to take upwear, or to relieve pressure on their seats. These valves. ELECTRIC LIGHTING PLANTS. 35 are carried on steel trunnions, and with hardened surfacesof contact are but little subject to wear. The steam orcut-off valve is set further away from the cylinder than inthe standard arrangements of Corliss and other builders ofthat class of engines, and this enables the maker of this engineto secure a single port with reduced clearance and lessliability to leakage, should the expansion valve leak. Inthis engine—and it should be the case in every engine inwhich the regulator is driven by belt—the connection fromshaft to governor is so made that the breaking of the beltpermits an automatic closing of the valve and the stopping The Wheelock Valves. of the engine. The regularity of motion of the class ofengines described in this section, may be inferred from thefact stated in regard to the engine here studied, that it hasbeen known to vary but a half rev
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectsteamen, bookyear1890
