Muirhead & Co., electrical engineers & contractors and manufacturers of electrical & telegraphic apparatus. (1893)
Muirhead & Co. · Muirhead & Co. · leaf 38
RESISTANCE COILS. 31 — 100.—Circular Rheostat, Muirheads pattern, fr OlJl 1 to N,000 ohm- • • • 4 * » • * … 10 10 0 450 151. Ditto ..♦ ditto, from 1 to 10, 000, arranged bo that the small coils may be used separately 151a. Circular Rheostat, P.O. pattern, for duplex working * ■ i » • • » • . • 152.—Ditto, ditto, with four extra coils of 1, 2, 2, 5 (►Inns ... i ♦ • « • ■ • • - .. . • 153,—Circular…
Electrical Equipment · Lightning protection for structures · Lightning protection for buildings · Batteries · Lighting · Maintenance testing of electrical systems · Wiring devices
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