FIRE BOMBS
CALL UP WATCHERS IiELL WHEX THEY HIT A HOUSE Automatic i.iariiiS which rinji -"i beli tin' moment a lire bomb gels into a. bnikiin;--: m:iy be a new ally of Britain's li and reds of thousands of lire watchers this winter. r.ritain's Ministry ef Home Security invited the I institution of Electrical Engineers: to consider the problem. They chose a committee to go into it and the result is a report on devices, one of which detects incerdiarv bombs by operating electrical circuits ruptured by impact.
This device had a closed electrical circuit with a special "dctectoi conductor" as one of its parts'. Should a fire bomb get into the building it breaks this conductor and sets off a bell. The advantage of the idea is that the alarm rings at the very second that the bond) hits the building and therefore before it has had time to start a lire. Other methods are also described, such as tile use of light detecting photo cells to operate the alarm by the effect of the bright light from the 1)0 ml). These systems have been standardised. and specifications by tlie British Standards Institution.
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https://paperspast.natlib.govt.nz/newspapers/BPB19411103.2.32
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Bay of Plenty Beacon, Volume 4, Issue 175, 3 November 1941, Page 6
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194FIRE BOMBS Bay of Plenty Beacon, Volume 4, Issue 175, 3 November 1941, Page 6
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