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Large Fixed-Gap Discharger With Case, by Marconi Company, London, Early 20th Century

Inventory Number: 65806

Date: Early 20th Century

Maker Details: Signed by Marconi's Wireless Telegraph Co. Ltd.

Inscription: "MARCONI'S WIRELESS / TELEGRAPH CO. LTD. / NO. 48645 LONDON" printed on brass maker's plaque upon upper surface of case.

Size: 275 mm (width ) x 515 mm (length) x 350 mm (height) [maximum dimensions]

Materials: Teak, brass, lead?, metal alloy, sand?, ebonite?, steel.

Other Given Number(s): Science Museum Loan 1959-218.


Large Fixed-Gap Discharger with large teak case. With ebonite?-based terminals topped by lacquered brass knobs, and black-painted connector rods upon upper surface of case. Front of case hinged at bottom to reveal interior with spark-gap. Interior of case is lead?-lined with a tray of sand-like material upon bottom surface of interior. Spark-gap consists of black ebonite? insulators attached to lacquered brass terminals connecting to steel spark-gaps. Spark gaps quite bad corroded, as are ebonite components. On display, and currently used, with Assorted Copper Busbars And Ebonite Insulators (Inv. Num. 79425).

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