. Electric railway journal . ttee who will bepresent, a number of officials of interurban railways whoare interested in the subject of rules have expressed anintention of attending the conference, which is open to have also been sent to the railroad or publicservice commissioners of New York, Indiana, Wisconsin,Illinois and other States, as well as to the Interstate Com-merce Commission, and it is expected that delegates froma number of these commissions will be in attendance. ROLLER AND BALL BEARING TROLLEY BASE The Trolley Supply Company, Canton, Ohio, has addedto its extensi
. Electric railway journal . ttee who will bepresent, a number of officials of interurban railways whoare interested in the subject of rules have expressed anintention of attending the conference, which is open to have also been sent to the railroad or publicservice commissioners of New York, Indiana, Wisconsin,Illinois and other States, as well as to the Interstate Com-merce Commission, and it is expected that delegates froma number of these commissions will be in attendance. ROLLER AND BALL BEARING TROLLEY BASE The Trolley Supply Company, Canton, Ohio, has addedto its extensive line of electric railway devices the Na-tional combination roller and ball-bearing base shown. Itis equally applicable for city and interurban service, is but434 in. high and weighs only 80 lb. The roller bearing feature of this design resembles thesame manufacturers Peerless base, but in addition it issupplied with a ball race around the center pin to take of?the end thrust friction and thus render it frictionless in its. Combination Roller and Bali-Bearing Base sidewise motion. The uniform tension maintained by thespring up and down is another important point emphasizedby the maker of this combination base. Every effort has been made to secure a simple and ruggedbase to the end of keeping the maintenance cost at the low-est level. The castings are of malleable steel; the rollersof cold-drawn steel working in a cage which preventsbinding; and the ball race set in a phosphor bronze ring,from which the balls cannot work out or seat general, the base requires little inspection, as no oil isneeded for either the roller or ball bearings and the springadjustment is practically permanent. MULTI-VAPO-GAP LIGHTNING ARRESTERS The Lord Electric Company, New York, has just put onthe market a new type of lightning arrester which has nomoving parts. It is based on the principle that static cur-rent, or lightning, will pass through a highly hygroscopicmass, through which it
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