Muirhead & Co., electrical engineers & contractors and manufacturers of electrical & telegraphic apparatus. (1893)
Muirhead & Co. · Muirhead & Co. · leaf 35
5»* • V 28 RESISTANCE COILS. 422a. Set of Resistance Coils, medium, 10,000 ohms, Muirheads rectangular pattern, arrangedin units, tens, hundreds and thousands, withbridge of four pairs of proportional coils (10,100,°1,000, 10,000) 41 0 0 … 422 a. 423.—Ditto ditto, large, 10,000 ohms, Muirheads rectangular pattern, arranged inunits, tens, hundreds and thousands, withbridge of four pairs of proportional coils (10,100, 1,000, 10.000), in separate case, andwith thermo-coil of 100 ohms as designed byMessrs. Hockin & Taylor, platinum…
Electrical Equipment · Lightning protection for structures · Lightning protection for buildings · Batteries · Lighting · Maintenance testing of electrical systems · Wiring devices
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