. Practical electricity in medicine and surgery. aryCautery Battery. Fig. 210.—Top of Fiffarb Battery, snow-ing Connections for Series anbQuantity-. of a treadle, in others by forcing a current of air through thefluid with a rubber bulb, or by giving the plates, which arehung on pivots, a rocking motion with the hand. One of themost convenient forms of portable cautery battery is that devisedby Dr. Henry G. Piffard, of New York, and shown in Fig. 210. 242 PRACTICAL ELECTRICITY IN MEDICINE AND SURGERY. Storage batteries give excellent satisfaction as cautery-batteries. They can be charged by at
. Practical electricity in medicine and surgery. aryCautery Battery. Fig. 210.—Top of Fiffarb Battery, snow-ing Connections for Series anbQuantity-. of a treadle, in others by forcing a current of air through thefluid with a rubber bulb, or by giving the plates, which arehung on pivots, a rocking motion with the hand. One of themost convenient forms of portable cautery battery is that devisedby Dr. Henry G. Piffard, of New York, and shown in Fig. 210. 242 PRACTICAL ELECTRICITY IN MEDICINE AND SURGERY. Storage batteries give excellent satisfaction as cautery-batteries. They can be charged by attaching them to a seriesof gravity cells (ten or twelve are sufficient), and when thebattery is wanted for use it can be detached from the chargingcells and carried wherever needed. When the electrodes areattached, and the rate of discharge regulated by a rheostat, theinstrument is ready for use. In Fig. 211a storage battery forthis purpose is shown. It contains three cells, and furnishes acurrent powerful enough for all cautery / Fig. 211.—Storage Battery for Galvaxo-Cacteey. Dynamo Machines.—Several European surgeons have useda small Gramme machine as the source of the energy requiredto heat cautery electrodes. Where steam, water-power, a gas-engine, or an electro-motor can be obtained, a dynamo machinefurnishes the ideal source of electrical energy for the compound machine of, say, a half horse-power will, so longas it is kept rotating at the proper rate of speed, furnish (1) acurrent of low electro-motive force and large quantity, suitable DYNAMO MACHINES. 243 for electro-cautery operations; (2) a current of high electro-motiveforce and small quantity, suitable for electrolytic work andthe general purposes of the medical electrician, and (3) a cur-rent by which an induction coil can be worked so as to give afaradic current. Naturally, this is only practicable for stationaryoutfits. For a portable apparatus the physician is still limitedto th
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectelectri, bookyear1890
