Dredge's Suspension Bridge Explained Upon the Principles of the LeverJ. Weale, 1841 - 62 páginas |
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Dredge's Suspension Bridge Explained Upon the Principles of the Lever: To ... W. Turnbull No hay ninguna vista previa disponible - 2017 |
Dredge's Suspension Bridge Explained Upon the Principles of the Lever: To ... W. Turnbull No hay ninguna vista previa disponible - 2017 |
Dredge's Suspension Bridge Explained Upon the Principles of the Lever James Dredge,William Turnbull No hay ninguna vista previa disponible - 2023 |
Términos y frases comunes
a d cosec abutment angle of direction BALLOCH FERRY bars beams binds and obliges Bonhill bracket catenary chain A P circle consequently construction cord or chain denote diameter diminish direction A P direction CB direction CE distance F H draw the straight Dunbarton Dunbartonshire equal equation of condition equilibrium feet long force applied force in direction foresaids fulcrum at F fulcrum F given force hereby HIGH HOLBORN horizontal thrust inches iron joint effects length Let A F fig lever A F librate load Luss magnitude manner oblique suspending rods oblique thrust pendicular perpendicular platform point of suspension pounds sterling principle remote extremity respectively right angles River Leven road-way single force Sir James Colquhoun strain subsidiary forces Ditto suppose SUSPENSION BRIDGE sustained in equilibrio tension tons towers triangle trigonometry vertical direction vertical force weight acts
Pasajes populares
Página 47 - And I consent to the registration hereof in the books of Council and Session or any other judges' books competent, therein to remain for preservation, and thereto I constitute . . . my procurators, etc.
Página 4 - The suspending rods or bars that support the platform or road-way, instead of being hung vertically or at right angles to the plane of the horizon, are inclined to it in angles which vary in magnitude from the abutments to the middle of the bridge, where the obliquity, as well as the stress upon the chains, attains its minimum value. The...
Página 47 - Pounds Sterling to be paid by the Party failing to the Party observing or willing to observe the same, over and above performance and the said Parties consent to the registration hereof in the Books of Council and Session or others competent that letters of horning on six days...
Página 47 - ... from fact and deed as regards the rents ; and the clause consenting to registration for preservation and execution shall import a consent to registration and a procuratory for registration in the books of council and session, or other judge's books competent for preservation, and that letters of horning or six days...
Página 50 - Bonhill ; the stringing courses at the road-way, springing of the arch, and the offsets at the top of the tower, of a white stone in the neighbourhood. Upon the tops of the towers are large cast-iron plates, on which the chains rest. The principal chains for supporting the structure are formed of | round bars, laid side by side to the number of 13 upon the tops of the towers, and successively dropping one at each joint until it arrives at the centre, where that part of the chain is reduced to a single...
Página 31 - Let us now suppose that another subsidiary force as a (fig. 6) is added to the system, applied at the point C, and acting in the direction C E. Then, since the weight of the lever remains the same, as well as the distance from the fulcrum of the point in which it is conceived to be concentrated, it will constantly require the same amount of power to effect the equilibrium, whatever may be the number of forces employed, in whatsoever manner they may be applied, and in whatever directions they may...
Página 4 - Each bar performs its own part in supporting the load in proportion to its distance from the abutment; so that the entire series of suspending...
Página 63 - Ibs. ; consequently, the number of bars required at the towers will be 523200-5-35000= 14-948 bars. This, however, is on the supposition that the iron is strained vertically in the direction of its fibres, but this in the case of a bridge is contrary to fact, the bars being all placed in an oblique position with respect to the horizon, while the weight acts in a direction perpendicular to it; the power of the iron must therefore be reduced in the ratio of radius to the sine of the angle of obliquity...
Página 4 - Each bar is considered to perform its part in supporting the load, in proportion to its distance from the abutment, drawn into the sine of the angle of its direction, so that the entire scries of suspending bars transmits the same tension to the points of support as would be transmitted by a single bar reaching from thence to the middle of the bridge.
Página 48 - Books competent for preservation ; and that letters of horning, or six days' charge, and all other execution needful, may hereon pass on a decree to be...