TitleResistance Box, Telegraph Condenser Co.About this objectThis resistance box is a precision instrument used to regulate and measure electrical resistance in laboratory and telegraphy applications.
Housed in a wooden case with brass terminals and a bank of removable plug connectors, the device allows users to select specific resistance values by inserting or removing plugs – each corresponding to a calibrated resistor. Like another object in the Museum’s collection, 99.76, this resistance box was an essential tool in electrical testing, calibration, and circuit design. They allowed technicians and engineers to simulate load conditions, verify instrument accuracy and conduct controlled experiments.
Established in London in 1906 by electrical engineer Sidney George Brown, Telegraph Condenser Co. Ltd originally started as a platform for Brown’s inventions and later became known for manufacturing innovative condensers for the burgeoning telegraphy industry. By the mid-20th century, the company was supplying a diverse range of condensers for applications including telegraph, wireless, telephones and battery eliminators, demonstrating its adaptation to emerging technologies. It has also developed a market in Australia around this time, which likely explains the provenance of this object.Object No.99.86CreatorTelegraph Condenser Co. Ltd.Inscriptions & marksTHE TELEGRAPH CONDENSOR Co. Ltd.DimensionsH: 90mm
W: 270mm
D: 162mmPlace madeLondonSourceLa Perouse MuseumOn displayNoTypeMuseum objectsOrganisations (Detailed entries)La Perouse Museum (La Perouse, N.S.W.)ThemesScience and communication
