. Electrical world. system isthe use of the Thury automatic pressure regulator for automaticallymaintaining a constant load on the generators running in parallelwith the battery. The booster armatures are drum-wound with aslightly channeled core, and the coils are held in by driving horns,a double-wound armature is employed, and each winding is con-nected to a commutator, one at each end of the machine. The twoarmature coils can be connected in series or parallel as required. Inthe design of the reversible booster special attention has been paidto meeting the rapid changes of load and voltage
. Electrical world. system isthe use of the Thury automatic pressure regulator for automaticallymaintaining a constant load on the generators running in parallelwith the battery. The booster armatures are drum-wound with aslightly channeled core, and the coils are held in by driving horns,a double-wound armature is employed, and each winding is con-nected to a commutator, one at each end of the machine. The twoarmature coils can be connected in series or parallel as required. Inthe design of the reversible booster special attention has been paidto meeting the rapid changes of load and voltage without these armatures the winding on the smooth core is placed asnear as possible to the periphery and with the tangentially-arrangedfield coil the iron in the field magnets is reduced to a minimum. Thecombined efficiency of the reversible booster set is 81 per cent. Aftera six-hours run at full load the temperature rise does not exceed70° F. Fig. I gives a diagram of connections of the Thury auto-. FIG. I.—DIAGRAM OF REVERSIBLE BOOSTER. matic reversible booster system. A is an ammeter, B, C, C , (7„, F,switches; D a voltmeter, E a fuse, G the battery ammeter, H thestarter, / rheostat, / the booster reversing switch, K automatic reg- June i8, 1904. ELECTRICAL WORLD and ENGINEER. 1167 Tilator, L regulator motor, M motor. .V booster voltmeter, O reverse-current cut-out, P a two-way switch, Q the battery, R the boosterwith two commutators, 5 a rheostat solenoid, and T a regulator sole-noid.—Lond. Elec, May 20. REFERENCES. Canton-Akron Railaay.—A description of an interurbanrailway in Northern Ohio. All dispatching is done by car carries a portable telephone, which may be used atany point on the line on tapping the telephone wire by means of along bamboo rod carried on the car. In addition to passenger traffic,the company does some express business.—5f. Ry Jour., May 28. Trolley Harp.—An illustrated description of a troll
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
