A new protection alarm invented by engineer Mr F J Allen, an engineer of Victoria Street

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A new protection alarm invented by engineer Mr F J Allen, an engineer of Victoria Street

A new protection alarm invented by engineer Mr F J Allen, an engineer of Victoria Street, Westminster, London is being considered by the Post Office and Scotland Yard, to defeat raids in and around London. The Invention omits a shrill sound at a signal from an assistant behind the counter of a Post Office or shop. The whistle can be heard outside the building and continue until stopped. The device can be put into operation by stepping on board, by pressing the board with the knee and kicking the board, or by any other methods. Mr F J Allen with his invention..
21 April 1933

Media ID 11260997

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