Walsh, David · London : Baillière, Tindall and Cox · leaf 43
ide the contact break is usually found a commutator or keyfor making contact or for changing the direction of the currentIt will be found desirable to alter the direction of the current attimes, or one platinum point will wear out much faster than theother. In a box below the base, and forming part… … Fig. 15.—Motor Mercury Break. numbers on one side to one of the two supports armed with theplatinum contact points, and the odd numbers on the other sideto the second support. The object of the condenser is to de-magnetize as quickly as possible the soft iron core, as the lengthof the spark depends…
X-rays · Radiography
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