Mechanical Engineering

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.

On April 12, 1910, Margit Urbántsek of Budapest first patented a novel method for ornating piled fabrics. Her invention featured a socket-shaped iron that could be easily interchanged without tools or delay, allowing users to apply different patterns with speed, precision, and safety—unlike previous methods that required unscrewing hot components.

On June 24, 1911, Madame Marguerite Farcot, née d’Albaret, a French national, was granted a patent for a high-power multi-cylinder engine designed for aviation. Her invention featured a stationary support shaft around which the cylinders rotated, interlocking at their base to form a central casing.

On June 30, 1892, Marguerite-Hortense Lançon of Bienne was granted a patent for a novel aluminum watch case. Her design featured an integrated structure, allowing all the main components to be assembled in a single motion, eliminating the need for separate assembly of individual parts.

On May 31, 1948, Maria Adriana Rotteveel-Landman of The Hague, Netherlands, patented a portable photocopying device — a compact, flat machine with a moving light source that allowed users to easily copy documents and book pages anywhere.

On January 17, 1911, Canadian inventor Mary Amber Phillips patented an improved, long-lasting tyre designed to reduce skidding and allow for cheap manufacturing. Date of Application: 9 September 1910 Date of Issuance: 17 January 1911

On March 16, 1909, Matilde Pionzio-Cavagnino of Turin, Italy, was granted a patent for a novel machine designed to register commercial transactions and facilitate bookkeeping. The device aimed to assist both experienced accountants and beginners.

On June 17, 1930, Maude Mayo Bentz of Montclair, New Jersey, obtained a patent for a combined humidifier and air-deflector designed for use on steam or hot-water radiators. Her device used a water trough, hinged cover, and vertically arranged wick elements to moisten and redirect rising warm air, improving indoor comfort while reducing wall and woodwork soiling.

On April 19, 1932, Nora F. Hays of Wilmerding, Pennsylvania, received a patent for an improved dirt collector designed to remove moisture and debris from pressurized air systems. Her design featured a collecting chamber with a conical valve that allowed accumulated water to be discharged quickly and safely.

On April 7, 1949, Odette Portier of Paris patented an improved support for lighting fixtures, especially for public lighting. Her design replaced the traditional threaded tube with a smooth tube secured in a matching smooth sleeve, preventing the frequent breakage that occurred at the joint.