The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 337
d 14 inches diameter, of which 3inches are cut away in fitting it to the square face of the hangingpost (C): it is secured on the ground by two screw-pins (G) of 5 dia-meter fitting into the square holes shown in the diagram, and the pinsare leaded into limestone or freestone blocks, jfeS A… … As the inclined plane extends one inch beyouil the quarter circle, ati; inches distance from the centre of motion, a gate lo feet long willfall of itself, till the head of it is opened to about 20 inches beyondthe quarter circle, because as 0 : 1 : ; 120 ; 20; but beyond that itwill be at rest,…
Architecture · Civil engineering · Science
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