. Electrical world. is flat and the back way isV-shaped. A convenient shelf is secured to the back of the bed forthe reception of tools, etc. The countershaft has self-oiling and self-aligning shaft bearings, four step cone and tight and loose pulleys. Each lathe is furnished with a face plate, two point centers, and,when desired, with slide rest, draw-in chuck and collets, etc. Thelo-in. and 12-in. Star speed lathes are made by the Seneca FallsManufacturing Company, 422 Water Street, Seneca Falls, N. Y. Motor Starter for Variable Speed Work. There is a large demand for a motor starter uith wh
. Electrical world. is flat and the back way isV-shaped. A convenient shelf is secured to the back of the bed forthe reception of tools, etc. The countershaft has self-oiling and self-aligning shaft bearings, four step cone and tight and loose pulleys. Each lathe is furnished with a face plate, two point centers, and,when desired, with slide rest, draw-in chuck and collets, etc. Thelo-in. and 12-in. Star speed lathes are made by the Seneca FallsManufacturing Company, 422 Water Street, Seneca Falls, N. Y. Motor Starter for Variable Speed Work. There is a large demand for a motor starter uith which is com-bined a field regulating resistance for use with variable-speed motors,the speed range being obtained by field control. The requisites forthis combination may be stated as follows: I. That the field rheostat shall be so interlocked with the motor !- » ® t^^m rm -MOTOR STARTER. Starter that the motor cannot be started under condition of weakfield. 2. That the field rheostat must have twenty or more steps. STARTER. (at least 20) in order to give even gradations of control. 3. Thatthe starter must be entirely enclosed—to prevent short-circuits dueto flying of metallic chips, etc. 4. That the starter must be equippedwith an independent interlocking circuit-breaker which will protect 336 ELECTRICAL WORLD and ENGINEER. Vol. XLIII. No. 7. the motor at all times, both during the period of starting and in thefull running position. 5. That the no-voltage release must be in-dependent of the field strength and connected across the armatureterminals (it is not satisfactory to connect this no-voltage releaseacross the line, as an arc will be formed at the switches when openedif so connected). The Ward Leonard Electric Company has constructed a combina-tion starter, as shown in the accompanying cuts, which is claimed toentirely fulfil all the above conditions, and also meets the specifica-tions of the United States Government regarding such apparatus. Outlet Switch Boxe
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
