. Dental electro-therapeutics. ikeone large cell with large zinc surface, producing current asif contained in one cell, only the resistance is lessened byhaving several cells and the current is collected more effec-tively, the voltage, however, is affected in the reverse, itremains the same as from one cell. This has already beenexplained. The heating of the cautery loop depends on the voltageand internal resistance of the battery, and in constructingsuch a battery this must be very low in order that a verylarge current may be taken from it. The current strengthcan be augmented by adding cells
. Dental electro-therapeutics. ikeone large cell with large zinc surface, producing current asif contained in one cell, only the resistance is lessened byhaving several cells and the current is collected more effec-tively, the voltage, however, is affected in the reverse, itremains the same as from one cell. This has already beenexplained. The heating of the cautery loop depends on the voltageand internal resistance of the battery, and in constructingsuch a battery this must be very low in order that a verylarge current may be taken from it. The current strengthcan be augmented by adding cells in series with each ofthose in parallel, or by connecting two equal numbers inparallel and then these two groups in series; by this ar-rangement the current from a number of cells is producedwith the resistance reduced as if from cells in series. CAUTERY BATTERY 101 Where the main current is installed the cautery from aswitchboard is much more satisfactory, but the resistancemust be constructed to take large currents. Fig. 37. 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
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherphiladelphialeafeb
