. Journal of electricity. ircuit on the initial reverse move-ment of the driven apparatus so that all movement of theapparatus is arrested. The apparatus consists of a polechanging switch in the motor circuit which is held in posi-tion to close the forward driving circuit by a latch and which is provided with^a spring for moving it to the reversedriving position when the latch is released. When the latchis tripped, the switch moves instantly into the reverse posi-tion, causing the motor to stop suddenly and reverse its di-rection, and thereby reverse the direction of rotation of thedriven elem
. Journal of electricity. ircuit on the initial reverse move-ment of the driven apparatus so that all movement of theapparatus is arrested. The apparatus consists of a polechanging switch in the motor circuit which is held in posi-tion to close the forward driving circuit by a latch and which is provided with^a spring for moving it to the reversedriving position when the latch is released. When the latchis tripped, the switch moves instantly into the reverse posi-tion, causing the motor to stop suddenly and reverse its di-rection, and thereby reverse the direction of rotation of thedriven element. The switch is connected to the drivenelement so that the instant that its direction of motion re-verses, the switch is moved to neutral position. Apparatus for Fractionating HydrocarbonsPatent No. 1,250,879, issued to Leon E. Hirt of Los An-geles, California, discloses a new method of and a new appa-ratus for fractionating hydrocarbon oils, by the use of theelectric arc. The oil is first heated to vaporization and is. then flowed into a closed retort and maintained under con-trollable pressure and subjected to the action of an electricarc within the chamber. The arc breaks dov/n the vapor intoa plurality of fractionated vapors which are conducted fromthe chamber and condensed. Water HeaterPatent No. 1,251,210, issued to Ida R. Forbes of Los An-geles, California, shows an electrical water heater employinga rather complex system of control. The heater consists ofa tank in which is arranged an adjustable thermostat which —t;. ■ ,
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Keywords: ., bookcentury1900, bookdecade1910, bookidjo, booksubjectelectricity
