| Date | Text | |
|---|---|---|
23 Feb 1892
Black American patent |
Black American patent In 1892, black American, Henry A. Bowman of Worcester, Mass., was issued a U.S. patent for a "Method for Making Flags" (No. 469,395). Bowman devised an easy method to apply emblems or stars upon the field fabric of flags whereby those affixed on opposite sites of the field would correspond in position. He used a cut star or emblem which was stitched through the fabric and an unformed blank on the reverse, using a zigzag stitch over-seaming the raw-cut edges. The blank on the reverse could then be cut away to the outline of the seaming stitches. |
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23 Feb 1892
Hugh Burgess |
death Hugh Burgess Died 23 Feb 1892 (born c. 1825). British-born American co-inventor (1852, with Charles Watt) of the "soda" process to produce paper from wood pulp, digesting wood shavings by cooking them in a caustic soda (sodium hydroxide) solution. In 1719, Frenchman Rene de Reaumur suggested using wood to make paper, similar to the paper-like material created by North American wasps to build their nests. By 1850, when a German, Friedrich Keller, devised a grinding method to make paper from wood, the product had poorer quality than rag pulp. Burgess and Watt devised a way to separate the cellulose from the intercellular lignin matter (to render the cellulose fit for being made into paper) and to produce fibres of proper length for immediate felting into paper. |
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23 Feb 1892
Rudolf Diesel |
Rudolf Diesel (technology) Rudolf Diesel obtains a patent for a compression-ignition engine. |
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