. The Street railway journal . FIG. 1 FIG. 3 opening at the top of the heater, which is covered by an ironcanopy, leaving an air space of 1 in. between the box and thecanopy. To prevent any possible overheating of the box whichmight cause scorching of clothing, a number of slots are pro-vided on the back of the heater to facilitate the escape ofheated air. Two 500-volt, 10-amp. switches are mounted on a specialsupport at one end of the heater, and by means of these switchesone-half of the full heating equipment of each heater may beused. A ribbed plate is attached to the front of the heater by
. The Street railway journal . FIG. 1 FIG. 3 opening at the top of the heater, which is covered by an ironcanopy, leaving an air space of 1 in. between the box and thecanopy. To prevent any possible overheating of the box whichmight cause scorching of clothing, a number of slots are pro-vided on the back of the heater to facilitate the escape ofheated air. Two 500-volt, 10-amp. switches are mounted on a specialsupport at one end of the heater, and by means of these switchesone-half of the full heating equipment of each heater may beused. A ribbed plate is attached to the front of the heater bymeans of screws, and by simply taking off this plate the interiorof the heater may be inspected, as shown in Fig. 2. The elec-tric equipment proper consists of eight iron-clad Prometheusheating units supported on blocks of porcelain, which are at-tached by means of studs to the back of the box. The maincircuit wires leading to the heater are passed through a special. FIG. 2 FIG. 4 porcelain bushing and a porcelain tube at the one end of theheater, as shown, where they are connected to copper lugs. Sosimple is the construction of the heater that the entire electricequipment can be taken out and replaced in ten minutes. The Prometheus units each have a capacity of 100 volts, sothat the total capacity of the heater is 800 watts. Each unit is1% ins. wide x 12 ins. long x y% in. thick, and consists ofstrips of mica upon which the conducting metal has been me-chanically deposited, or, more strictly speaking, fired. The heaters which have been adopted for use in the toiletrooms are shown in Figs. 3 and 4, the former showing the frontand the latter the back of the heater. These wall plates, whichmeasure 14 ins. x 28 ins., and which are finished in dull nickel,are attached to cast-iron boxes, built into the wall, in such a [Vol. XXIV. No. 20. manner that after the heater is in place the front of it is flushwith the slate covering of the walls. The electric
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
