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Onwood's Patent Ohmmeter, by Gambrell Brothers, London, Early 20th Century

Inventory Number: 95036

95036-1t 95036-2t

Date: Early 20th Century

Maker Details: Signed by Gambrell Brothers Ltd.

Inscription: "ONWOOD'S PATENT / RES OHMS No / AT 20C / GAMBRELL BROS LTD LONDON" printed on surface of interior scale.

Size: 140 x 130 x 110 mm (case)

Materials: Teak?, glass, nickel, brass, ebonite, assorted metals.

Other Given Number(s): Christie's 178.


Onwood's Patent ohmmeter'>Ohmmeter, with glazed window in teak? case. Window reveals half-moon resistance scale (scale 0-120 Ohms). With two brass terminals on side of case, and pair of brass terminals on ebonite base on other side of case. Previously catalogued with Three-Position Switch (Inv. Num. 40839), Carborundum Detector (Inv. Num. 90595), 'Marconi' Ammeter (Inv. Num. 62660), Small Coupled Two-Way Switch (Inv. Num. 61022).

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