In this blog entry I would like to introduce readers to George Beattie, who on July 6th 1848 was granted a patent for his Improved Air Spring, that relied on a vacuum one side of the piston and atmospheric pressure on the other side to control the action of a door, having no springs whatsoever in its innovative design.
Reproduced below is George Beatties description of his wonderful door spring found on page 295 t0 296 of The Civil engineer & architects journal, Volume 13.
Reproduced below is George Beatties description of his wonderful door spring found on page 295 t0 296 of The Civil engineer & architects journal, Volume 13.
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