Road Danger Lamps

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Air Raid Precautions Lamps

Late A.R.P. lamp design

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Late A.R.P. lamp design
The green version is a later design, patented (see links page) by a Walter Georger Batt. This features four removable red glasses, covered by "shields". One "shield" has a movable disc (not mentioned in the patent) which uncovers a hole that aligns with a clear circle in the corresponding glass. Once lit this allows the lamp to emit, in addition to red light , a small pencil beam of white light upwards. The purpose of this is unkown, at this time, but may have provided a method of illumination to alllow I.D. cards to be viewed or somesuch.
Posted on August 22, 2009 Slideshow