MILLER, Dorothy, English. In 1925 she invented an aid to filtration, a fitment that she called Jack in the Funnel. The device was dropped into a funnel mouth and down into the neck where it hung suspended. When filling a container in which the level of liquid was not visible (e.g., a hot water bottle), the Jack popped up in the funnel to indicate that the container was full. Dorothy’s float system prevented spillage, burns and overfilling. Dorothy, who lived a quiet life on the Isle of Wight, won the first Woman Inventor of the Year Award from the Institute of Patentees & Inventors in 1925. She was very surprised at all the interest in her product.