Airplane Screw Propellers Arthur Alexander Dashwood Lang Limited Original Patent Lithograph 1932
On this original linen-backed lithograph from 1932 (includes original specification sheet), Arthur Alexander Dashwood Lang patented improvements in and relating to aeroplane screw propellers. In 1909 Arthur Alexander Dashwood Lang became interested in aircraft propeller design and made some propellers in his own name. Lang developed and patented, processes for copper tipping propeller blades, as well as producing fabric tipped propellers, such as those used on the Royal Aircraft Factory B.E.2C aircraft. In 1910 he went to work for British & Colonial (later the Bristol Aircraft Co.) as manager of the propeller shop. He left in 1912 and set up in partnership with David Garnett at the Riverside Works Weybridge, Surrey.The company was called Lang, Garnett & Co. This enterprise lasted a matter of months before Garnett left the firm. Lang established the Lang Propeller company and continued to use the "Riverside Works ", (these premises were later used by The Airscrew Company to manufacture propellers and associated components) in 1913, and at its peak the company supplied wooden propellers to nearly every aeroplane company in England. Lang sold this company to the Sopwith Aircraft company.
All patent lithographs sold by Maymont Group are 100% ORIGINAL.
These documents are NOT reproductions or posters (patent art).
These are the original lithographs found in books obtained from the Patent and Trademark Office directly.
In the 1800's and early 1900's, inventors would submit a detailed drawing of the invention and/or improvements to the patent and trademark office. Once received and if approved, the Patent office would then send a letter of confirmation to the inventor and begin to take that drawing and etch it into stone in order to create and print this linen-backed lithograph. These documents are the original hard copies that were created by the patent office's artists, and act as patent examiner reference material. With that being said, these are 100% original and are the only physical copies in existence.
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