A Treatise of Mechanics, Theoretical, Practical, and Descriptive, Band 2F.C. and J. Rivington, 1815 - 58 Seiten |
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Seite 4
... shaft as AP ( fig . 6. pl . 11. ) fix a large hori- zontal wheel MOIL , the lower part of which is indented in waves MSO , O91 , & c . of which the constituent arches are either circular or parabolic . On a convenient point D of an ...
... shaft as AP ( fig . 6. pl . 11. ) fix a large hori- zontal wheel MOIL , the lower part of which is indented in waves MSO , O91 , & c . of which the constituent arches are either circular or parabolic . On a convenient point D of an ...
Seite 6
... shafts or axles shall be inclined in given angles , as represented in figs . 1 and 7. pl . III . And in this case the wheels are seldom portions of cylinders , but most commonly portions of cones . When the wheels do not make an angle ...
... shafts or axles shall be inclined in given angles , as represented in figs . 1 and 7. pl . III . And in this case the wheels are seldom portions of cylinders , but most commonly portions of cones . When the wheels do not make an angle ...
Seite 8
... shaft or axle of one wheel , and de the axle of an- other wheel , the angler in which they intersect each other being equal to the angle in which the motion is proposed to be communicated : let it be required for the shaft de to revolve ...
... shaft or axle of one wheel , and de the axle of an- other wheel , the angler in which they intersect each other being equal to the angle in which the motion is proposed to be communicated : let it be required for the shaft de to revolve ...
Seite 9
... shaft B ; also on the points L , M , N , T , connected with the shaft A : thus the two shafts are so con- nected that one cannot turn without causing the other to turn likewise . These joints may be constructed by a cross of iron , or ...
... shaft B ; also on the points L , M , N , T , connected with the shaft A : thus the two shafts are so con- nected that one cannot turn without causing the other to turn likewise . These joints may be constructed by a cross of iron , or ...
Seite 55
... shaft : his objections have , we believe , been justified in every instance by the inferior efficacy of these horizontal mills . " The disadvantage of horizontal windmills ( says he ) does not consist in this , that each sail , when ...
... shaft : his objections have , we believe , been justified in every instance by the inferior efficacy of these horizontal mills . " The disadvantage of horizontal windmills ( says he ) does not consist in this , that each sail , when ...
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acceleration angle axis axle balance balance spring barometer beam body bottom brass capstan centre centrifugal force circular circular saw circumference cistern clock cock column common construction contrivance cord Coulomb crane crank cylinder descend diameter distance effect elasticity employed engine equal experiments extremity fastened feet fixed fluid frame friction groove gudgeons hole horizontal horizontal plane horse hygrometer inches ingenious invented iron length lever load lower machine machinery manner means mercury mill motion moving force nearly observed passes pendulum piece pinion pipe piston pivots placed planchets plane plate pressure produce proportion pulley pump quantity quicksilver radius raised ratio resistance roller rope round sails screw shaft shew side slide specific gravity spirit of wine steam stroke surface teeth thermometer tion tube turn upper valve vapour velocity vertical vessel vibration water-wheel weight wheel whole
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Seite 45 - ... (7) The load, at a maximum, that sails of a similar figure and position will overcome, at a given distance from the centre of motion, will be as the cube of the radius.
Seite i - Studies serve for delight, for ornament, and for ability. Their chief use for delight, is in privateness and retiring; for ornament, is in discourse; and for ability, is in the judgment and disposition of business...
Seite 530 - I have seen the water run like a constant fountain stream forty feet high. One vessel of water rarefied by fire driveth up forty of cold water ; and a man that tends the work is but to turn two cocks, that, one vessel of water being consumed, another begins to force and refill with cold water, and so successively, the fire being tended and kept constant, which the self same person may likewise abundantly perform in the interim, between the necessity of turning the said cocks.
Seite 525 - A way how to make a boat work itself against wind and tide, yea both without the help of man or beast ; yet so that the wind or tide, though directly opposite, shall force the ship or boat against itself; and in no point of the compass...
Seite 534 - ... to keep them sweet, running through several streets, and so performing the work of scavengers, as well as furnishing the inhabitants with sufficient water for their private occasions...
Seite 434 - ... means afforded, ex re nata, and no need of provision beforehand, though much better if foreseen, and means prepared for it, and a premeditated course taken by mutual consent of parties.
Seite 45 - If sails are of a similar figure and position, the number of turns in a given time will be reciprocally as the radius or length of the sail.
Seite vii - Another idea we have of body, is the power of communication of motion by impulse ; and of our souls, the power of exciting motion by thought. These ideas, the one of body, the other of our minds, every day's experience clearly furnishes us with : but if here again we inquire how this is done, we are equally in the dark. For in the communication of motion by impulse, wherein as much motion is lost to one body as is got to the other, which is the...
Seite 527 - A way in one night's time, to raise a bulwark twenty or thirty foot high, cannon-proof, and cannon mounted upon it, with men to overlook, command, and batter a town ; for, though it contain but four pieces, they shall be able to discharge two hundred bullets each hour. 31.
Seite 45 - The effects of the same sails, at a maximum, are nearly, but somewhat less than, as the cubes of the velocity of the wind.