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In 1927 Hudson purchased A De Courcy's patent rights, tools and stock.
Hudson became the world's largest maker, gaining the Thunderer Registered Trademark.
In 1870, aged 22, he started his own business with younger brother James.
In 1883 Hudson began tinkering in his toolshed to make gadgets to sell, including whistles.
They are headquartered in the Jewellery Quarter district of Birmingham, England.
After observing local police struggling to communicate with rattles, he realised that his whistle could be used as a tool.
As the story goes, Hudson, a violin player, accidentally dropped his violin and it shattered on the floor.
Air Raid Precautions whistles were made during the next few years and dated whistles for army, navy and Royal Air Force equipment and for Civil Defence. Some of the most popular whistle designs in the modern day include: Hudson stamped addresses and other marks on many of its whistles.
Marked service whistles have been used by many police forces, railway companies, fire brigades and other organisations.