Mechanical Engineering

On June 23, 1894, Clara Hedwig Martini of Leipzig was granted a patent for developing a novel floating device. Her invention featured a lightweight floating structure, designed to facilitate swift movement through the water.

On May 25, 1908, Franziska Leser, a German inventor from Munich, was granted a patent for developing an innovative device to dry out damp walls. Her invention featured a system of air inlets and wires to ensure constant and extensive air circulation.

On May 18, 1895, Amelia Noel, a noblewoman of Cardiff, was awarded a patent for improvements to pipe making machinery. Specifically, she proposed enhancing the machine by reducing the pressure needed to shape socket ends.

On February 17, 1894, Anna Siebert, a noblewoman living in Darmstadt, Germany, was awarded a patent for improvements to the chain stitch used in a lockstitch sewing machine, which she had been previously registered in 1891.

On October 25, 1902, Franziska Gangloff, a resident of Rožmitál, Czech Republic, was awarded a patent for developing a novel head for scraping knives, specifically designed to process the wide side surfaces of shingles on shingle machines.

On February 10, 1949, Franziska Herzberg, a resident of Graz, was awarded a patent for developing a novel luggage rack and child seat for the front wheel of bicycles. The invention featured a lighter and simpler design intended to reduce stress on the wheel.

On December 28, 1925, Franziska Joksch of Vienna received a patent for developing a novel multiplication device aimed at expediting calculations and reducing the range of multiplication tasks. This device builds upon earlier innovations, incorporating individual tables up to 1000 and a small set of simple tools to facilitate efficient computation, especially for common uses in small businesses.

On November 30, 1889, Ida Hörnlimann of Bern was awarded a patent for her innovative design of a fruit press. This device was specifically developed to prevent any blockage of juice flow and minimise product losses during extraction.

On March 27, 1923, Mabel Frederick, of Pueblo, Colorado, was awarded a patent for developing a projector that could permit an image to be projected in a stable position for a considerable amount of time and automatically move to the next animation without the aid of an operator.