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Emergency telephone post on country road fitted with cover - to keep ice and snow from settling on its instruction plates (NO 30.6.75)
Emergency telephone post on country road fitted with cover - to keep ice and snow from settling on its instruction plates (NO 30.6.75)
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机译:乡村道路上的紧急电话亭,装有保护罩-防止冰雪在其指示牌上沉淀(NO 30.6.75)
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摘要
The front plate of an emergency telephone which bears operating instructions or other information which is liable to become obscured by a deposit of snow or ice is fitted with a flexible, water- and ice-repellant (pref. chloroprene polymer) cover. The cover is fastened to the plate, pref. along its top edge, and has (magnetic) catch at the bottom. Lead weights hold it down, and it may be reinforced with steel wire. When the cover is raised, a magnetic force switch activates the electrical appts. in the box.
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