. Dental electro-therapeutics. Cautery battery of cells. 102 ELECTRO-PHYSICS Accumulator Battery.—For cautery work and lightingsmall mouth lamps, antrum lamps, and working the dentalengine, this form of battery is one of the most useful. Theprinciple of the accumulator cells has already been de-scribed. For cautery two to six cells are connected inparallel and they need not be of large size, the cells havean E. M. F. of 2 volts each and the current strength willvary according to the capacity of the cells. When formed Fig. 38. Accumulator battery for cautery. into a battery there should be a sl
. Dental electro-therapeutics. Cautery battery of cells. 102 ELECTRO-PHYSICS Accumulator Battery.—For cautery work and lightingsmall mouth lamps, antrum lamps, and working the dentalengine, this form of battery is one of the most useful. Theprinciple of the accumulator cells has already been de-scribed. For cautery two to six cells are connected inparallel and they need not be of large size, the cells havean E. M. F. of 2 volts each and the current strength willvary according to the capacity of the cells. When formed Fig. 38. Accumulator battery for cautery. into a battery there should be a sliding contact rheostatto turn on the current gradually to suit the size of thecautery or lamp that is being used. Many of the smallbatteries have a capacity of 50 ampere hours which underordinary circumstances will do service in a dental surgeryfor a long time. The accumulator battery is superior toa chemical cell battery for surgical work or light. For working an ordinary motor dental engine which is ACCUMULATOR BATTERY 103 of shunt wound type and usually requires about 6 to Svolts electro-motor force, an accumulator battery of sixcells connected in series will give ample power to workthe motor. The arrangement for such a battery consists of six oreight Plante or Faure type accumulator cells connectedin series; these should be placed in a cool shady corner ofthe workroom some distance away from the workbench sothat the fumes generated in charging or otherwise attend-ing to the cells will not affect the instruments or
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