Portable Hand-Operated Siren Used by Air-Raid Warden

Contenuto

Useful in districts where electric power is not available, a light-weight siren operated by hand has been introduced here from England for use during air raids. The siren may be mounted permanently on its broad base or slung from the shoulder by straps. Easy for either a man or woman to carry and operate, the siren produces a powerful, far-reaching tone within two seconds. Thousands of the small sirens already are being used in England and other allied countries by fire and air-raid wardens, industrial guards, police and soldiers.

Titolo
Portable Hand-Operated Siren Used by Air-Raid Warden
Oggetto
en
en
Article Title and/or Image Caption
Portable Hand-Operated Siren Used by Air-Raid Warden
Lingua
eng
Copertura temporale
World War II
Data di rilascio
1942-05
pagine
81
Diritti
Public Domain (Google digitized)
Sorgente
Google Books
Referenzia
England
Archived by
Enrico Saonara