Way back in the 1860s, Joseph Hudson, who was a Birmingham trained toolmaker, converted his humble washroom at St. Marks Square, which he rented for 1s. 6d. (one shilling and six pence per week) into a workshop. Here he did anything he could to supplement the family income from watch repairing to cobbling shoes. Today Acme whistles are recognized as some of the finest whistles manufactured in the world today.
Joseph's whistle business was very small until in 1883 The London Metropolitan Police advertised for an idea to replace the policeman’s rattle a cumbersome means of communication for the bobby on his “beat” (the name given to his patrol).
Joseph Hudson invented a novel whistle for the purpose. It could be held in the mouth leaving the hands free a clear advantage over the rattle.