Mechanical movements, powers, devices and appliances; (1903)
Hiscox, Gardner Dexter, 1822?-1908 · New York, The N.W. Henley & co. · leaf 383
1543. MEAN TIME SUNDIAL.—Thelength of the stile is made to just cover theentire range of the suns altitude at the dis-tance of the scale on the hour circle. Itsshape and size to be proportionate to the sunsequation of time as marked on the scale.When the sun is fast the reading should be onthe… … -i r z^- It DOOR PUSH CHECK.—The spring closes the piston in the cylinder has a valve to allow quick inlet of air when opening a door, and a small hole adjustable at the bottom of the cylinder for slowly discharging the air. 1545. FOLDING LADDER.—The rounds arepivoted to the side pieces, which are…
Mechanical movements
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