Quote:
Originally Posted by Nickthedentist
Talking of special bulbs, the motoring torches with flashing red beacons and a spring-terminal lantern battery usually took a tubular MES lamp with an integral bimetallic strip to provide the flashing action. I can still remember that the initial "on" period was slightly longer than subsequent ones, as the thing came up to operating temperature.
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Yes - that's exactly what I remember. The bimetal strip was heated by the bulb filament - a rather neat way of getting the flashing-action without needing to waste any power in a separate 'heater' winding for the bimetal.