. Western electrician . e latterconduit, and which are insulated from it and from eachother, and which are also insujated from the surface of thestreet by superposed non-conducting material, and whichproject into the slotted conduit, a trolley which engages withthe plates, and a magnet and a motor on the car, whereby themagnet may draw the main conductor into direct contact with themetallic plates. i32i593- Converter System for Electric Railways. CharlesF. Scott, Pittsburg, Pa. Application filed July 31,1893. This invention, as shown in the cut, is for an alternating cur-rent feeding circuit,
. Western electrician . e latterconduit, and which are insulated from it and from eachother, and which are also insujated from the surface of thestreet by superposed non-conducting material, and whichproject into the slotted conduit, a trolley which engages withthe plates, and a magnet and a motor on the car, whereby themagnet may draw the main conductor into direct contact with themetallic plates. i32i593- Converter System for Electric Railways. CharlesF. Scott, Pittsburg, Pa. Application filed July 31,1893. This invention, as shown in the cut, is for an alternating cur-rent feeding circuit, a working converter led thereby, a chokecoil in series with the primary thereof, and a normally openshort-circuit around the choke mil, a bridge for closing the short-circuit, and electrical means for operating the bridge in serieswith one of the coils of the working converter, the choking coilsbeing so proportioned as to be unsaturated when the secondaryis open, and saturated when it is closed under normal NO. 532,549. 532,605. Annunciator for Telephonic Circuits. TheodoreSpencer, Cambridge, Mass. Application filed Septem-ber 10, 1894. The features of this invention are: A self-setting annunci-ator, comprising an eectro-magnet connected directly in a tele-phone circuit, and having a magnetizing helix and also a wind-ing shunting the entire magnetizing helix and constituting apath of low impedance to voice currents, a shutter or signalplate provided .vith a lever extension, and adapted when freedfrom control to fail by its own weight, and a lever of superiorweight to that of the signal plate attached to the armature andnormally resting upon the lever extension, and adapted whenthe armature is released from the attraction of the magnet towithdraw the signal plate and retain it in its retracted position, 532,633. Railway Block Signal. William Berrigan andWilliam H. McClure, Elmira, N. Y. Applicationfiled September iS, 1S94. In this system there is claimed the combin
Size: 1724px × 1450px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, bookidwesternelect, bookyear1887
