. Supplement to Spons dictionary of engineering, civil, mechanical, military, and naval. for the purposeof maintaining a uniform resistance in the circuit when the line is connected to earth direct, orthrough the battery. C is a condenser, for compensating the static charge from the line, and isattached by a wire to a brass plate C P, on the rheostat R, which is provided with plugs for con-necting it with the resistance coil plates, by which the condenser charge can be sent through anyportion of the resistance coils as desired. The method suggested by Frischen, in 1863, in which 526 ELECTEICAL
. Supplement to Spons dictionary of engineering, civil, mechanical, military, and naval. for the purposeof maintaining a uniform resistance in the circuit when the line is connected to earth direct, orthrough the battery. C is a condenser, for compensating the static charge from the line, and isattached by a wire to a brass plate C P, on the rheostat R, which is provided with plugs for con-necting it with the resistance coil plates, by which the condenser charge can be sent through anyportion of the resistance coils as desired. The method suggested by Frischen, in 1863, in which 526 ELECTEICAL ENGINEEEING. he proposed to employ differential polarized receiving instruments, and arrange the key so as tosend reversals, has been adapted to Stearnss apparatus in England. Fig. 1102 is tlie arrangementof the apparatus. The key is provided with a switch, so that the battery may be disconnectedwhen not required for working. A differential galvanometer G is employed for convenience inbalancing the resistances with accuracy. The rheostat cods K are arranged in a circle, and contact. is made by means of two arms resembling the hands of a watch, one of which is connected to thehigher and the other to the lower resistances, A series of retardation coijs connect E with thecondenser 0, so that its return discharge may be graduated to correspond with that from the is a Siemens polarized relay with differential helices ; L line, E earth, U S the up station, D Sthe down station. 1102.
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectenginee, bookyear1879
