. 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. 405. MULTI-SPEED ELEC-TRIC MOTOR. A handwheeland set of bevel gears draw thefield magnets away from the arma-ture for varying the speed by chang-ing their distance apart. Model ofthe Stow Mfg. 406. DRUM CONTROLLER in which varia-tions in speed are controlled by t
. 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. 405. MULTI-SPEED ELEC-TRIC MOTOR. A handwheeland set of bevel gears draw thefield magnets away from the arma-ture for varying the speed by chang-ing their distance apart. Model ofthe Stow Mfg. 406. DRUM CONTROLLER in which varia-tions in speed are controlled by throwing into thecircuit resistance in sections suitable to the require-ments for different speeds. The details of construction vary greatly to meetthe purpose for which they are to be used, and aremade in rheostatic or resistance type, or in seriesparallel type for shunting or short-circuiting one ofthe motors. 407. COMMUTATOR CONSTRUCTION. Edison type. Acast-iron or brass sleeve s is bored to fit the shaft. On the back end is secured a steel collar /, which is coned^^^3[^^^ at ^to fit the conical ends of the bars, a conical steel ring A slips up against theother end, and the bars are clamped upby means of the steel nut k. The insula-tion is entirely of mica, as this is the onlyinsulating material that has been found suitable for the insulation ofcommutators. The sleeve s is insulated by a cylindrical body insula-tion 7n, against which the bars are clamped. The end insulations /and / are of mica built up into conica
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Keywords: ., bookauthorhiscoxgardnerdexter18, bookcentury1900, bookdecade1910
