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Record Details

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

preview image for Onwood's Patent Ohmmeter, by Gambrell Brothers, London, Early 20th Century
Inventory Number: 95036
Object Type:
Place Created: London United Kingdom (England) Europe
Accession Number: 2004-9/498
Brief Description: Onwood's Patent 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).
Primary Inscriptions: "ONWOOD'S PATENT / RES OHMS No / AT 20°C / GAMBRELL BROS LTD LONDON" printed on surface of interior scale.
Provenance: Presented by the Marconi Corporation.
Collection Group: Marconi Collection
Material(s): Teak?
glass
nickel
brass
ebonite
assorted metals.
Dimensions:
Height Width Depth Diameter Unit
105 130 140 mm

There are no associated narratives.

Image with multimedia irn 40133Image with multimedia irn 40134

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