. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . eleton having a T-section, whichdivides the core into two arms of the spider whichholds the armatuie are insulatedfrom the core and frame, and fitinto notches which are cut taper-ing from both sides toward thecenter, so as to keep the hole con-centric. The coils of the arma-ture, which are rectangular in sec- , • i 1 at tj ution. are wound automaticallv upon the core bv an ingenious machine devised by Mr.
. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . eleton having a T-section, whichdivides the core into two arms of the spider whichholds the armatuie are insulatedfrom the core and frame, and fitinto notches which are cut taper-ing from both sides toward thecenter, so as to keep the hole con-centric. The coils of the arma-ture, which are rectangular in sec- , • i 1 at tj ution. are wound automaticallv upon the core bv an ingenious machine devised by Mr. Hoch-hausen for that purpose. When placed upon the armature-core the coils are separated onthe outer circumference bv wooden wedges, which are secured to the cast-iron skeleton of thearmature, and they are held in position by sections of fiber-band which are screwed into thewooden wedges just referred to. » i i The regulation of the machine is a development of the methods heretofore employedby Mr. Hochhausen, and is very ingeniously carried out. consisting in the shifting of thebrushes in conjunction with a regulating resistance, both of which are simultaneously operated. Fig. dynamo. 2U DYNAMO-ELECTRIC MACHINES. by an old device originated by Mr. Hoclihausen—namely, a small auxiliary motor. Thismotor, which is entirely hidden from view, is situated in the hub-liirojo(:tion beariiiir onthe arms which span the two pole-pieces besiile tlie end of the aniiiiture-sliart, and whichmij^ht be mistaken, except on closest scrutiny, for the hearing of the shaft. Tins small motoris fixed in a magnetic field, which is produced by attaching tlie cast-iron arms shown, to eachpole-piece and bringing them together, so as to surround tlie armature of the small motor. Itmight be thought for an instant that such a bridging of the magnetic circuit would take alarge number of the magnetic lines of force away from the armature, but this has been pro-vided for by mounting the cast
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Keywords: ., bookcentury1800, bookdecade189, booksubjectmechanicalengineering
