WW2 British Army HELIOGRAPH TRIPOD STAND with Carrying Strap 1940

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British Army HELIOGRAPH TRIPOD STAND Complete with original brown webbing carrying strap (see picture) 1940 Wooden legs with brass fittings; height 101 cms; engraved in the brass - `STAND, LAMP OR HELIO MK. III' `P.B & S LTD. 1940' some stress cracks in the brass fittings but the item is in overall excellent condition (see pictures). The tripod weighs over 2 kilos before packaging. Posting within the United Kingdom will be by Royal Mail standard parcel service at a cost of £10 A heliograph is a wireless solar telegraph that signals by flashes of sunlight (generally using Morse code ) reflected by a mirror . The flashes are produced by momentarily pivoting the mirror, or by interrupting the beam with a shutter. The heliograph was a simple but effective instrument for instantaneous optical communication over long distances during the late 19th and early 20th century. Its main uses were military, survey and forest protection work. The heliograph remained standard equipment for military signallers in the Australian and British armies until the 1960s, where it was considered a "low probability of intercept" type of communication. It was used by the Pakistani army as late as 1975 and Canada had the last major army to have the heliograph as an issue item. By the time the mirror instruments were retired they were seldom used for signalling. read more

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