. The Civil engineer and architect's journal, scientific and railway gazette. Architecture; Civil engineering; Science. Fig. 2, .W-Ii. ;;v;;;^/-Jf?;^;^;|»j;.f!V^;â¢,^^jSg?i-S;SSipSU^.'<;= i--a''V-;r-777~T'â â ' â â ; Refekences. A, Upper leaf of sluice. B, C, D, Water chambers. E, F,'Wickets. G, Cribwork. H, Pool of dam. I, Plank floor. J, Finders of timber. W L, Water line. The Btar Trap Sluice Gale, vphich is exhibited in plan and section in the annexed diagrams, consists of two leaves or shutters, reclining against each other so as to present a
. The Civil engineer and architect's journal, scientific and railway gazette. Architecture; Civil engineering; Science. Fig. 2, .W-Ii. ;;v;;;^/-Jf?;^;^;|»j;.f!V^;â¢,^^jSg?i-S;SSipSU^.'<;= i--a''V-;r-777~T'â â ' â â ; Refekences. A, Upper leaf of sluice. B, C, D, Water chambers. E, F,'Wickets. G, Cribwork. H, Pool of dam. I, Plank floor. J, Finders of timber. W L, Water line. The Btar Trap Sluice Gale, vphich is exhibited in plan and section in the annexed diagrams, consists of two leaves or shutters, reclining against each other so as to present a triangular vertical section, and contain beneath them a space capable of being filled with water from the superior level, and emptied thereof at will; the contained angle at the vertex, when the gates are up, being rather more than 100°, in order that the leaves may slide easily, one over the other, which they evidently would not do if the vertical angle of the uplifted gate were either a right or an acute angle; this sluice gate is raised and depressed by liydrostatic pressure, applied and removed upon the principle of that well known philosophical instrument called the Hydrostatic Bel- lows ; in its usual form, as applied upon the Lehigh, it will not work in dead water, but requires the action of a head more than sufficient to «vercome the weight and friction of the gates, to enable it to be manoeuvred with facility.* By an inspection of the diagrams it will be perceived that the leaves * Mr. English, formerly a contractor upon some of the works of the Lehigh navigation, having for many years observed the action of the Bear Trap .Sluice Gates, has conceived the idea of rendering them applicable as the upper gates of Lift Locks, by placing a large air vessel under the lower leaf, â «hich bv its buoyancy enables the gates to rise m dead water: and he has exhibited at the Franklin Institute a working model of a lock having the Bear Trap Gates, with his attache
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Keywords: ., boo, bookcentury1800, booksubjectarchitecture, booksubjectscience
