Induction Coil, by Marconi Company, London, c. 1906
Inventory Number: 12640
Date: c. 1906
Maker Details: Signed by Marconi's Wireless Telegraph Co. Ltd.
Inscription: "MARCONI'S WIRELESS / TELEGRAPH COMPANY LD / LONDON. / NO. 330" printed on celluloid plaque on upper surface of base. "S.W.A" etched on front panel of base.
Size: 630 x 310 x 280 mm (height including coil).
Other Given Number(s): Christie's 28, Science Museum Loan 1924-503.
10-inch Induction Coil, converted for use as a telephone transformer, on mahogany plinth. With wax-coated windings, ebonite ends, additional brass components and terminals. With additional ivory? mini coil and eight lacquered brass electrodes (marked "N", "P", "C1", "C1", "C2", "C2", "COIL", "COIL"), on upper surface of base. Missing spark-gap and outer bakelite sleeve.