Muirhead & Co., electrical engineers & contractors and manufacturers of electrical & telegraphic apparatus. (1893)
Muirhead & Co. · Muirhead & Co. · leaf 42
GALVANOMETERS. 35 SECTION VI. GALVANOMETERS 535.—Galvanometer; or Linemans Detector, with vertical needle and one circuit only 536.—Ditto, ,♦. ditto, with two circuits, high and low resistance ... 0 0 » * # ■ ■ * 3 0 0 … 536. > 537.—Galvanometer ... ditto, with three circuits of 2 ohms, 10 ohms, and 1,000 ohms respec- T/l V c I y *«* •■• *•• ••• • * ■ • # ■ 538. 539, Ditto, test box detector, with vertical needlefitted with commutator for line testing, P.O. pattern ... • » • • r • » • • • * Ditto, portable form,…
Electrical Equipment · Lightning protection for structures · Lightning protection for buildings · Batteries · Lighting · Maintenance testing of electrical systems · Wiring devices
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