Electrical news and engineering . method of operation for overhead and below-the-lloor work,The manufacturers claim that more holes can be bored inan hour in this way than can be bored i:i a day by ordinarymethods. Distributors are wanted for this machine. Armeter Testing Device A new armature testing device has been placed on themarket by the P. E. Chapman Electrical Works, Tenth andWalnut Streets. St. Louis, Mo. This is claimed to eliminatethe step-by-step method, the test being made in one opera-tion. In testing an armature the commutator is ^slipped intothe circle of contact fingers locate
Electrical news and engineering . method of operation for overhead and below-the-lloor work,The manufacturers claim that more holes can be bored inan hour in this way than can be bored i:i a day by ordinarymethods. Distributors are wanted for this machine. Armeter Testing Device A new armature testing device has been placed on themarket by the P. E. Chapman Electrical Works, Tenth andWalnut Streets. St. Louis, Mo. This is claimed to eliminatethe step-by-step method, the test being made in one opera-tion. In testing an armature the commutator is ^slipped intothe circle of contact fingers located in the centre of the in-strument. Individual lamp? which are used as indicators. position in deep grooves and iircvented from making con-tact with the mounting surface. Xickcl-platcd binding posts are inserted in each section and lin-\olt. lin-cycle alternat-ing current is supplied. From the brilliance of the lampthe type of defects and their locations can be ground detector indicates grounds while a pilot lamp isused to show the brilliance that should be obtained in test-ing a coil with no defects. The instrument is marketed asa production instrument and is not adjustable to differentsizes of armatures. THE ELECTRICAL NEWS Hot Plate The Uetsy Ross Hot Plate has been recently placed onthe market by the Central Flatiron Manufacturing Com-pany, 200 Fifth Ave., New York. Its construction embodiesa polished aluminum bowl and mahogany base, and re-
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Keywords: ., bo, bookcentury1800, bookdecade1890, bookidelectricalnewsen31donm
