. The Street railway journal . ened plates aftercontinuous service, as is often found in other types of anti-friction bearings. When the bearings are removed from thejack frame, they remain intact and do not separate and be-come hard to handle. The ratchet on this jack may be re-versed easier and quicker than the old style ratchet. This roller-bearing jack covers a wide and an importantfield in the handling of railway equipment, in bridge work andin the way of wrecking purposes. It is manufactured in allsizes, with capacities from 15 to 70 tons, and the company isalso making cone-bearing and r
. The Street railway journal . ened plates aftercontinuous service, as is often found in other types of anti-friction bearings. When the bearings are removed from thejack frame, they remain intact and do not separate and be-come hard to handle. The ratchet on this jack may be re-versed easier and quicker than the old style ratchet. This roller-bearing jack covers a wide and an importantfield in the handling of railway equipment, in bridge work andin the way of wrecking purposes. It is manufactured in allsizes, with capacities from 15 to 70 tons, and the company isalso making cone-bearing and roller-bearing journal jackswith capacities of 10, 15 and 25 tons. WESTINGHOUSE BELTED TYPE, ROTATING FIELDALTERNATORS A line of belted type, self-contained, rotating field, alternat-ing-current generators, such as shown in the illustrations, hasrecently been placed on the market by the Westinghouse Elec-tric & Manufacturing Company. The machines are built forsingle, two and three-phase circuits, in sizes from 30 to 200 laminated and keyed or dovetailed to a cast iron spider. Thefield coils are composed of square Wire so wound as to exposethe maximum surface. In the generators having laminatedpoles heavy brass wedges, which hold the field coils in place,retard any shifting of the field between the poles, and thuspractically eliminate pumping between the generator and anyrotary converters or synchronous motors which may be con-nected in the system and insure satisfactory parallel operationof two or more generators. A large shaft insures cool runningof the bearings, and the absence of any distortion which mightresult from the pull of the belt. Every means has been utilized for the rapid dissipation ofheat from all parts of the machines. Open spaces in the lam-inated field register with those in the armature, and during op-eration air is drawn in through the field spider and forced outthrough the stationary core and windings, thus insuring lowoperating temperature. Excellent r
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
