The position of the reversing link is altered by means of a cord, passing over two pulleys, fixed respectively in the engine-house and on the derrick.
Units in the case illustrated in the figure), an operation which is performed by simply reversing, the direction of the maximum magnetizing current a few times.
The reversing key K having been put over to the left side, the short-circuit key S is suddenly opened; this inserts the resistance R, which has been suitably adjusted before hand, and thus reduces the current and therefore the magnetizing force to a known value.
To continue the process, the key K is turned over to the right-hand side, and then, while S is open, is turned back, thereby not only reversing the direction of the current, but diminishing its strength by an amount depending upon the previous adjustment of R2.
The second has a very small area, showing that the work done in reversing the magnetization is small; the metal is therefore adapted for use in alternating current trans formers.
Inside the torsion-head is a commutator for automatically reversing the current, so that readings may be taken on each side of zero, and the arrangement is such that when the torsion-head is exactly at zero the current is interrupted.
The trip being completed, the empty train is hauled back by reversing the engine.
Hoisting engines are provided with powerful brakes and frequently with reversing gear.
On reversing the motion the valve E closes and the liquid is forced through the valve F to the upper part of the cylinder.
On reversing the motion the - I valve E closes and the liquid is IL driven past the valve F.
4,as mannose is produced by reversing the sign of the asymmetric system adjoining the terminal COH group.
Gill introduced a powerful auxiliary to the accuracy of heliometer measures in the shape of a reversing prism placed in front of the eye-piece, between the latter and the observer's eye.
The third form is the outflow or reversing thermometer, first introduced by Aime, who used a very inconvenient form in the Mediterranean in 1841-1845, but greatly improved and simplified by Negretti and Zambra in 1875.
Towards the shaft, and the empty ones returned " in bye," or towards the working faces, by reversing the engine; while in the other systems, double lines, with the rope travelling continuously in the same direction, are the rule.
Twice the length of the way; the set is returned in bye, by reversing the engine, casting loose the main, and coupling up the tail drum, so that the tail rope is wound up and the main rope paid out.
Fore-sights are made right and left; tangent sights are interchangeable, the graduations are cut on the horizontal edges above and below, so that the sight can be changed from right to left or vice versa by removing and reversing the bar.
8 Alternately admitted into or rejected from the series, it was finally, some six or seven centuries ago, eliminated by the effects of precession in reversing the order of culmination of its limiting stars.
Also experimented on the pressure of powder and the velocity of the bullet in a musket barrel; this he accomplished by shortening the barrel successively, and measuring the velocity obtained by the ballistic pendulum; thus reversing Noble's procedure of gradually lengthening the gun.
On the ground that all the earlier copies had been contaminated by the Latin - almost reversing the teaching of Bentley.
It was marked by the complete defeat of the AntiUnionist party in Nova Scotia, only one member of which secured his election, thus exactly reversing the Pacific vote of 1867.
On his deathbed Richard, reversing his former arrangements, caused his barons to swear fealty to John (1199), although the hereditary claim of Arthur was by the law of primogeniture undoubtedly superior.
But the free-traders did not like Mr Balfour's formula as to reversing the traditional fiscal policy of import taxes for revenue only.
At the council of Sardica (343) an attempt had been made to regulate the procedure in these appeals, by recognizing as the right of the pope the reversing of judgments, and the appointment of fresh judges.
The air and gas, the latter coming from the gas producers or other source, arrive through H and J respectively, and their path thence is determined by the position of the reversing valves K and K'.
- Plan through Regenerators, Flues and Reversing Valves..
K, Air reversing valve.
K', Gas reversing valve.
The advantage of the " reversing " system is that it avoids lifting the piece from below to above the middle roll, and again lowering it, which is rather difficult because the white-hot piece cannot be guided directly by hand, but must be moved by means of hooks, tongs, or even complex mechanism.
Reversing his fathers policy, Otto resolved that the dukes should act in the strictest sense as his vassals, or lose their dignities.
The emperor, who, as Bismarck said, intended to be his own chancellor, required Bismarck to draw .up a decree reversing a cabinet order of Frederick William IV., which gave the Prussian ministerpresident the right of being the sole means of communication between the other ministers and the king.
& Ec. 297; 6 P.C. 435), the Exeter reredos case, the privy council, reversing the bishop's judgment, allowed the structure, which contained sculptures in high relief of the Ascension, Transfiguration and Descent of the Holy Ghost at Pentecost, together with a cross and angels; in R.
Whilst feeding, the bird wades about, stirs up the mud with its feet, and, reversing the ordinary position of its head so as to hold the crown downwards and to look backwards, sifts the mud through its bill.
Lord Ripon was sent out to India by the Liberal ministry of 1880 for the purpose of reversing Lord Lytton's policy in Afghanistan, and of introducing a more sympathetic system into the administration of India.
In diameter, should be raised and lowered by water power, under control of the observer by means of electric keys which act on secondary mechanism that in turn works the valves and reversing gear of the water engines.
For, if the directed part have the same direction as the factors, (b) shows that it will be reversed by reversing either, and therefore will recover its original direction when both are reversed.
The opposite case is obtained by reversing the sign of a.
The case of a sphere spinning about a vertical axis at, the lowest point of a spherical bowl is obtained by reversing the signs of a and c. It appears that this position is always stable.
Shifting in a straight line is usually reciprocating; that is to say, the piece, after shifting through a certain distance, returns to its original position by reversing its motion.
A catch or pall, turning on a fixed axis, prevents the ratchet-wheel or rack from reversing its motion.
In the older type of machine it 'is next led up to the right- ' hand one of the two reversing drums, which are placed above the large printing cylinders, and over which it passes with the printed side downwards.
Among other advantages claimed for this press one is that the movement which governs the action of the type bed in reversing is so arranged that the strain which sometimes occurs in other reciprocating machines is considerably reduced; another is that the registering or correct backing of the pages on the second side in printing is uncommonly good; but this depends much upon the layer-on.
In many of the old kinds of two-revolution machines, owing to the cylinder being geared separately from the type bed, it was apt to be occasionally thrown out, but in the Miehle, for instance, it is only out of gear in reversing, and in gear while printing.
The data given above refer to the mean reversing layer.
Henrys first outburst of self-assertion took the form of reversing his fathers thrifty and peaceful policy, by plunging into the midst of the continental wars from which Coat!England had been held back by his cautious parent.
The government, however, saw little reason in the events of the following months for reversing their coercive policy.
Large and radical as the measure was, reversing many of the accepted principles of legislation by giving the tenant a quasi-partnership with the landlord in his holding, no serious opposition was made to it in either House of Parliament.
It was, no doubt, possible to say a good deal for Gladstones indignant denunciation of his predecessors policy in annexing the Transvaal; it would have been equally possible to advance many reasons for reversing the measures of Lord Beaconsfields cabinet, and for conceding independence to the Goer War, Transvaal in 1880.
Young caught the " flash spectrum " of the reversing layer, at the moment of second contact, at Xerez de la Frontera in Spain, on the 22nd of December 1870.
But Philip in his turn nearly allowed himself to be led into an attempt at annexing England, and so reversing for his own benefit the work of the Angevins (1213); but, happily for the future of the dynasty, Pope Innocent UI.
Root Co., Medina, the combs for reversing after Ohio, U.S.A,) one side had been emptied of its contents.
The frame cases - wired on both sides - are hung at the angles of a revolving ring of iron, and the reversing process is so simple and effective that the " Cowan " reversible frame has been adopted in all the best machines.
He employed a Nachet combination of prisms and placed the dividing prism at the spot where a special reversing system formed a real image of the exit pupil of the objective.
Yeah, there's no reversing that.
The obvious remedy is to make all measures on opposite sides of the fixed web before reversing in position-angle - a precaution, however, which no careful observer would neglect.
The excellent manner in which the scales and micrometers are mounted, the employment of a compound microscope for viewing the scales, with its ingeniously arranged and admirably efficient reversing prism, and the perfection of its slow motions for focusing and reading, combine to render this a most accurate and convenient instrument for very refined measures, although too slow for work in which the measures must depend on single pointings in each of two reversed positions of the plate, and where speed of working is essential.
Where high speed lowering is not required it is usual to employ a reversing motor and keep it always in gear.
The singleneedle instrument is a vertical needle galvanoscope worked by a battery and reversing handle, or two " tapper " keys, the motions to right and left of one end of the index corresponding to the dashes and dots of the Morse alphabet.
Each of them, besides being a reversing gear, is an expansion gear both in forward and backward running.
The engine, which is provided with reversing gear, is of 12 or 15 horse-power and motion is communicated through a belt to the band-wheel, which operates the walking-beam by means of a crank.
K is a commutator for reversing the direction of the magnetizing current, and G a galvanometer for measuring it.