Treatise on Mills and Mill Work: On the principles of mechanism and on prime moversLongman, Green, Longman and Roberts, 1861 |
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angle angular velocity atmosphere axes axis beam boiler British thermal Units buckets calculated centre coal coefficient column condenser constant construction cord crank cubic feet curve cylinder density diameter direction distance effect employed equal evaporation experiments Fahr fall feet per minute feet per second fixed flues foot formula friction fuel furnace gauge gearing globe heating surface Hence horizontal horse power inches of mercury increased iron latent heat length machine machinery manometer manufacture maximum mechanism mercury mill millwright motion move number of teeth orifice oscillation pentrough pinion pipe piston placed plates power per hour pressure pulleys radius ratchet-wheel reservoir revolution revolutions per minute revolving rotation Saltaire saturated steam screw shaft side sluice square inch steam engine stroke superheated supply of water synchronal rotations t₁ tail-race temperature of saturation tion tube turbine valve velo velocity ratio vertical water wheels weight weir
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Strana 135 - ... sole-plates, which extending upwards, furnish openings into the interior of the wheel for the air to escape; but these, like many other plans, have been, to a certain extent, unsuccessful, owing to the complexity of their structure, and the inadequate manner in which the objects contemplated were attained. In fact, in wheels of this description it has been found more satisfactory to submit to acknowledged defects, than to incur the trouble and inconvenience of partial and imperfect remedies....
Strana vi - Generally, he was a fair arithmetician, knew something of geometry, levelling and mensuration, and in some cases possessed a very competent knowledge of practical mathematics. He could calculate the velocities, strength and power of machines: could draw in plan and section...
Strana 53 - On BA take Ba equal to the length of the stroke of the rod; divide it into any number of equal parts, say five", in the points b, c, d, e, and divide the semicircle BDEFG into the same number of equal parts by the radial lines AD, AE, AF, and AG. From A as a centre with Ab, Ac, Ad, and...
Strana v - ... as a motive power for the purposes of manufacture. He was the engineer of the district in which he lived, a kind of jack-of-all trades who could with equal facility work at the lathe, the anvil or the carpenter's bench.
Strana 2 - The base is a cylindrical stone, about five feet in diameter, and two feet high. Upon this, forming part of the same block, or else firmly fixed into it, is a conical projection about two feet high, the sides slightly curving inwards. Upon this there rests another block, externally resembling a dice-box, internally an hourglass, being shaped into two hollow cones with their vertices towards each other, the lower one fitting the conical surface on which it rests, though not with any degree of accuracy....
Strana 133 - ... condensation of the air, and for permitting its escape, during the filling of the bucket with water, as also its re-admission during the discharge of the water into the lower mill-race. Shortly after the construction of the water-wheels for the Catrine and Deanston Works, a breast-wheel was made and erected, for Mr. Andrew Brown, of Linwood, near Paisley. In this it was observed, when the wheel was loaded, and in flood-waters, that each of the buckets acted as a water-blast, and forced the water...
Strana 3 - ... their vertices towards each other, the lower one fitting the conical surface on which it rests, though not with any degree of accuracy. To diminish friction, however, a strong iron pivot was inserted in the top of the solid cone, and a corresponding socket let into the narrow part of the hour-glass. Four holes were cut through the stone parallel to this pivot. The narrow part was hooped on the outside with iron, into which wooden bars were inserted, by means of which the upper stone was turned...
Strana 3 - Ot course it worked its way to the bottom by degrees, and fell out on the cylindrical base, round which a channel was cut to facilitate the collection. These machines are about six feet high in the whole, made of a rough grey volcanic stone, full of large crystals of leucite.
Strana 76 - ... standard. The storage requisite for equalizing the supply afforded during this period should be provided with a due regard to the continuance of drought and the quantity of water which will flow off the ground in extreme wet seasons. No water should be allowed to run to waste. Experience has shown that in the regions of comparatively moderate rain in this country, the storage to effect this object should vary from 20,000 or 30,000 cubic feet to 50,000 or 60,000 cubic feet for each acre of collecting...
Strana 133 - The effect produced by this alteration, could scarcely be credited, as the wheel not only received, and parted with the water freely, but an increase of nearly one-fourth of the power was obtained, and the wheel, which still remains as then altered, continues, in all states of the river, to perform its duty satisfactorily. The amount of power gained, and the beneficial effects produced upon Mr. Brown's wheel, induced a new and still greater improvement in the principle of construction ; the first...