Aldis lamp

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Aldis lamp

(ˈɔːldɪs)
n
(Communications & Information) a portable lamp used to transmit Morse code
[C20: originally a trademark, after A. C. W. Aldis, its inventor]
References in periodicals archive ?
A wartime friendship was rekindled yesterday when a former Wren and a United States signaller - who had only communicated in Morse code via Aldis lamps - met for the first time.
She established a relationship communicating in Morse by Aldis lamp across a four-mile stretch of sea with Mr Campbell, whose ship was anchored as part of a convoy waiting to take part in the D-Day Normandy landings.
Without the Aldis lamps, the raid couldn't have taken place," said 30-year-old Mr Bateman.