A Treatise of Mechanics, Theoretical, Practical, and Descriptive, Band 2F.C. and J. Rivington, 1815 - 58 Seiten |
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Seite 6
... represented by the dotted lines in the figure . It is not absolutely necessary that the lever and wheel should be in the same plane ; but deviations from it are not often to be recommended , except in small machinery , such as a common ...
... represented by the dotted lines in the figure . It is not absolutely necessary that the lever and wheel should be in the same plane ; but deviations from it are not often to be recommended , except in small machinery , such as a common ...
Seite 8
... represents a single universal joint which may be employed where the angle does not exceed 40 degrees , and when the shafts are to move with equal velocity . The shafts A and B being both connected with a cross , will move on A the ...
... represents a single universal joint which may be employed where the angle does not exceed 40 degrees , and when the shafts are to move with equal velocity . The shafts A and B being both connected with a cross , will move on A the ...
Seite 32
... represented by — ( a quantity which was always found to vary between very narrow limits ) , gave the momentum of friction of the point of the needle against the planes of granite , agate , & c . respectively , in the ratio of the ...
... represented by — ( a quantity which was always found to vary between very narrow limits ) , gave the momentum of friction of the point of the needle against the planes of granite , agate , & c . respectively , in the ratio of the ...
Seite 35
... represented in fig . 4. no . 2. the rulers being in a perfectly horizontal position : then suspend on each side of the roller in use a weight of 50lbs . with very fine and flexible packthread ; or indeed by means of several such threads ...
... represented in fig . 4. no . 2. the rulers being in a perfectly horizontal position : then suspend on each side of the roller in use a weight of 50lbs . with very fine and flexible packthread ; or indeed by means of several such threads ...
Seite 46
... represented by a formula com- posed of two terms ; the first is a constant quantity independent of the tension , and ... represents the power , and the other letters as below . The weight to be elevated , is Q = 1000lbs 46 MECHANICS .
... represented by a formula com- posed of two terms ; the first is a constant quantity independent of the tension , and ... represents the power , and the other letters as below . The weight to be elevated , is Q = 1000lbs 46 MECHANICS .
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Häufige Begriffe und Wortgruppen
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.