John Barrow was the inventor of Barrow and Turner's first door spring which he patented in 1815, receiving 10 Guineas for his inventiveness and awarded the Silver Isis Medal from the committee for the Society for the Encouragement of Arts, Manufacturers and Commerce based in London.
For those interested further reading with regard to John Barrow's door spring can be found in the link below:
https://books.google.co.uk/books?id=J81UAAAAcAAJ&pg=PA149&lpg=PA149&dq=john+barrow+door+spring&source=bl&ots=X4KnvSFATB&sig=eMzFddbRGmu5h5b9abSo4AdAs8w&hl=en&sa=X&ved=2ahUKEwjq47nh0NvcAhWny4UKHZWCBxUQ6AEwBHoECAYQAQ#v=onepage&q=john%20barrow%20door%20spring&f=false
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