. Western electrician . er 100 per cent. lias also invented a wattmeterwhich measures twice the loss in other makers transform-ers, but ignores that in his own. States that he alone un-derstands real alternating currents. Kelsch Arc Lamp Hanger Board. The hanger board for arc lamps illustrated by the accom-panying cut was devised by R. S. Kelsch of the ChicagoEdison company for the purpose of providing an abso-utely fire-proof board with a switch that should allow thelamps to be completely cut off from the circuit, and notmerely shunted. This hanger board has been approved bythe Board of Under
. Western electrician . er 100 per cent. lias also invented a wattmeterwhich measures twice the loss in other makers transform-ers, but ignores that in his own. States that he alone un-derstands real alternating currents. Kelsch Arc Lamp Hanger Board. The hanger board for arc lamps illustrated by the accom-panying cut was devised by R. S. Kelsch of the ChicagoEdison company for the purpose of providing an abso-utely fire-proof board with a switch that should allow thelamps to be completely cut off from the circuit, and notmerely shunted. This hanger board has been approved bythe Board of Underwriters and by the Electrical Inspec-tion Department of the city of Chicago. The board consists of a rectangular plate of marbleizedslate with four binding posts, two for the line and two forthe lamp terminals. The two outside posts are the pre-scribed eight inches apart, and are for the mains, the lampbeing suspended from the two inside posts. In the centerof tile board is a series of four brass sleeves, which are part. KELSCH ARC LAMP HANGER BOARD. of the line and lamp terminals. These sleeves are so spacedthat when a hard rubber plunger, carrying spring brass fer-rules is pushed to one side or the other, the ferrules eithercomplete the circuit from the mains to the lamp or en-tirely separate the main and lamp circuits, without,however, opening either. All the metal parts haveample carrying capacity, so as to ttand 50 amperes withoutheating, and the brass contact ferrules being split and madeof spring brass insure absolute contact at all times. At atest made by the Board of Underwriters it was found thatwith as many as five arc lamps connected to the lamp ter-minals (in series) the switching device showed no sparkingwhen thelamp loop was cut in or out. The binding postsare drilled from two sides so that the line wires may enterfrom either direction. Instead of the lamp being suspendedby wires from the lamp posts, the binding screws may beremoved and a brass suspension rod, pr
Size: 2179px × 1147px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, bookidwesternelect, bookyear1887
