DOMESTIC MOTORS. 



327 



directly upon the point of cut-off as in the best machines of large power. 

 It is placed inside the belt-pulley, and dispenses with the ordinary 

 belt, thereby avoiding the danger of the engine racing through the 

 breaking or slipping of the belt. The balls are two heavy weights 

 revolving with the belt-pulley, and balanced by spiral springs. They 

 are free to move in the direction of the radius of the wheel to and from 

 the center, and, as they do so under variations of speed, they operate 

 the cut-off mechanism in a simple manner. The working of this gov- 

 ernor has been found very satisfactory in use, and it seems to be well 

 suited to engines of larger power. This engine is made in sizes of 

 one half, one, one and a half, two, and two and a half horse-power, 

 and up to five horse, while the pumping-engine is made of a capacity 

 of from two hxmdred and fifty to fifteen hundred gallons per hour, 

 raised one hundi-ed feet high. The former amount is pumped with 

 an expenditure of twenty-five feet of gas an houi\ These engines 

 have been on the market some five years, and have been found very 

 satisfactory in use. 



An engine of very much smaller power, and quite novel construc- 

 tion, the invention of Mr. Charles Tyson, has very recently been brought 

 out, which seems to be well adapted to driving such light machinery 

 as sewing and knitting machines, lathes, scroll-saws, fans, coffee-mills, 

 etc. It is quite safe, requires but little care, does not easily get out 

 of order, and can be managed by any one capable of using a sewing- 

 machine. It is ornamental in design and handsomely finished, fitting- 

 it to be used in any room of a dwelling that is convenient. Those at 

 present made are of about one quarter of a man-power (one thousand 

 foot-pounds per minute), but larger sizes, adapted to a greater range of 



Fig. 6. 



CENERATOir. 



work, will probably be built should the present machine prove satisfac- 

 tory in use. Gas is used as fuel, but they can be made to burn either 

 coal, wood, or oil. The construction and method of generating steam 

 are such that an explosion can not occur, and the steam-gauge, water- 

 gauge, and safety-valve are therefore dispensed with, with the advan- 

 tage of considerably lessening the cost. The idea carried out in the 

 construction of this engine is that of converting the water into steam in 



