The U.S. Patents of
Nikola Tesla
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COMMUTATOE FOR DYNAMO ELECTRIC MACHINES.
No. 334,823. Patented Jan. 26, 1886.
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N. PETERS. PhotoLithographer, Washington. O. C.
NIKOLA TESLA, OP SMIL J AH LIE A, ATJSTEIA-HUNGAEY, ASSIGNOE TO THE
TESLA ELEOTEIC LIGHT AND MANUFACTTJEING COMPANY, OP EAHWAY,
NEW JEESEY.
COMMUTATOR FOR DYNAMO-ELECTRIC MACHINES.
SPECIFICATION forming part of Letters Patent No. 334,823, dated January 26, 1886.
Application filed May 6, 1885. Serial No. 104,53-1. (No model.)
Be it known that I, Nikola Tesla, of
Smiljan Lika, border country of Austria-Hungary, have invented an Improvement in Dy5 namo-Electric Machines, of which the following is a specification.
My invention relates to the commutators on dynamo -electric machines, especially in machines of great electromotive force, adapted
io to arc lights; and it consists in a device by means of which the sparking on the commutator is prevented
It is known that in machines of great electromotive force — such, for instance, as those
15 used for arc lights — whenever one commutator bar or plate comes out of contact with the collecting-brush a spark appears on the commutator. This spark may be due to the break of the complete circuit, or of a shunt of low resistance formed by the bru…