. Mechanical appliances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical movements, powers and devices" ... including an explanatory chapter on the leading conceptions of perpetual motion existing during the past three centuries. g shafts, a b, which arecarried up at an angle of about 45 degrees andconnected with a differential motion controllingthe works and hands of a larger dial placedabove the two others. This peculiar motionis constructed of a light shaft, h, on which isfastened at right
. Mechanical appliances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical movements, powers and devices" ... including an explanatory chapter on the leading conceptions of perpetual motion existing during the past three centuries. g shafts, a b, which arecarried up at an angle of about 45 degrees andconnected with a differential motion controllingthe works and hands of a larger dial placedabove the two others. This peculiar motionis constructed of a light shaft, h, on which isfastened at right angles a crosspiece, on one end of which is mounted thewheel, g. On the shaft, h, and engaging with the wheel, g, are two larger wheels, e /, of 90 teeth each;these wheels are cut on both sides,as shown. Engaging with thesewheels are wheels of 60 teeth each,fastened on the upper ends of theshafts a b. It will be seen thatboth clocks are directly connectedwith the differential motion, andalso that as long as the wheels, e /,which turn in opposite directions,are driven at the same speed,the wheel, g, will simply roll on itspivot without altering .its positionor that of the shaft h. But as-suming that the wheel, /, revolvestwice around while the wheel, e,revolves once, then the wheel, g,will necessarily follow /, and in pro-. HOROLOGICAL, TIME DEVICES, ETC. 267 portion to the speed of the two wheels, e j; but as these wheels move inopposite directions, it consequently follows that one-half the difference in the rates is lost,or instead of mak-ing a completer e V o 1 u tion—thedifference betweenI and 2—i t h a sonly recorded halfa revolution. Now, to com-pensate for thiserror—i n otherwords, to regainthe half revolutionlost—the wheelson the upper endsof the shafts, a b,have 60 teeth each,and the pinions atthe lower endshave 30 teeth each;and as the drivingwheels, c d, having90 teeth each, areconnected through
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Keywords: ., bookauthorhiscoxgardnerdexter18, bookcentury1900, bookdecade1910
