overshot meaning manufacturer

At such times, when the fun rippled and soared from height to height, suddenly, without rhyme or reason, his eyes would turn lacklustre, his brows knit, as with clenched hands and face overshot with spasms of mental pain he wrestled on the edge of the abyss with some unknown danger.

The abbe saw he had overshot the mark, and he added quickly, -- "No one; but in order to have known everything so well, you must have been an eye-witness."

I had gone down in evening-clothes by an evening train, but had carefully overshot old landmarks, and alighted at a small station some miles south of the one where I was still remembered.

For a while he managed very well; indeed, he was a model of moderation and prudence - something too much so for the tastes of our wild community; but, somehow, Lowborough had not the gift of moderation: if he stumbled a little to one side, he must go down before he could right himself: if he overshot the mark one night, the effects of it rendered him so miserable the next day that he must repeat the offence to mend it; and so on from day to day, till his clamorous conscience brought him to a stand.

The amusingly varied crests of these beautiful edifices were the product of the same art as the simple roofs which they overshot, and were, actually, only a multiplication of the square or the cube of the same geometrical figure.

BAGUIO CITY -- A man died while three others were hurt when a delivery van overshot a road and crashed in Suello Village here on Sunday morning, reports from a volunteer rescue group said.

MANILA -- The airstrip in Tacloban City will be closed to large commercial planes on Sunday, the Civil Aviation Authority of the Philippines said on Saturday evening, hours after a private jet overshot the runway at the Daniel Z.

Whether it is in the field of electronics, PCB design, theoretical analysis, or in the area of sports, accuracy is the ultimate goal. However, phrases like, “you missed your mark,” or “you overshot your target,” are all too common. In any case, it is never a good thing.

His initial goal was to raise £1,000, but the overachieving nonagenarian overshotthings a little, finishing his 100 laps two weeks early on April 16, and raising, as of this writing, almost £19 million.

Noun Akatsuki spacecraft closed in on Venus seven years ago, its main engine failed and with no way of slowing down, the spacecraft overshotthe planet and barreled into orbit around the Sun.

In 1981, A Korean Air Lines Boeing 747 jetliner overshotthe runway while taking off from Manila’s international airport and skidded to a stop at the edge of a major highway.

These example sentences are selected automatically from various online news sources to reflect current usage of the word "overshot." Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Overshot and backshot water wheels are typically used where the available height difference is more than a couple of meters. Breastshot wheels are more suited to large flows with a moderate head. Undershot and stream wheel use large flows at little or no head.

There is often an associated millpond, a reservoir for storing water and hence energy until it is needed. Larger heads store more gravitational potential energy for the same amount of water so the reservoirs for overshot and backshot wheels tend to be smaller than for breast shot wheels.

Overshot and pitchback water wheels are suitable where there is a small stream with a height difference of more than 2 metres (6.5 ft), often in association with a small reservoir. Breastshot and undershot wheels can be used on rivers or high volume flows with large reservoirs.

Breastshot wheels are less efficient than overshot and backshot wheels but they can handle high flow rates and consequently high power. They are preferred for steady, high-volume flows such as are found on the Fall Line of the North American East Coast. Breastshot wheels are the most common type in the United States of America

A vertically mounted water wheel that is rotated by water entering buckets just past the top of the wheel is said to be overshot. The term is sometimes, erroneously, applied to backshot wheels, where the water goes down behind the wheel.

A typical overshot wheel has the water channeled to the wheel at the top and slightly beyond the axle. The water collects in the buckets on that side of the wheel, making it heavier than the other "empty" side. The weight turns the wheel, and the water flows out into the tail-water when the wheel rotates enough to invert the buckets. The overshot design is very efficient, it can achieve 90%,

Overshot wheels require a large head compared to other types of wheel which usually means significant investment in constructing the headrace. Sometimes the final approach of the water to the wheel is along a flume or penstock, which can be lengthy.

A backshot wheel (also called pitchback) is a variety of overshot wheel where the water is introduced just before the summit of the wheel. In many situations, it has the advantage that the bottom of the wheel is moving in the same direction as the water in the tailrace which makes it more efficient. It also performs better than an overshot wheel in flood conditions when the water level may submerge the bottom of the wheel. It will continue to rotate until the water in the wheel pit rises quite high on the wheel. This makes the technique particularly suitable for streams that experience significant variations in flow and reduces the size, complexity, and hence cost of the tailrace.

The direction of rotation of a backshot wheel is the same as that of a breastshot wheel but in other respects, it is very similar to the overshot wheel. See below.

Some wheels are overshot at the top and backshot at the bottom thereby potentially combining the best features of both types. The photograph shows an example at Finch Foundry in Devon, UK. The head race is the overhead timber structure and a branch to the left supplies water to the wheel. The water exits from under the wheel back into the stream.

A special type of overshot/backshot wheel is the reversible water wheel. This has two sets of blades or buckets running in opposite directions so that it can turn in either direction depending on which side the water is directed. Reversible wheels were used in the mining industry in order to power various means of ore conveyance. By changing the direction of the wheel, barrels or baskets of ore could be lifted up or lowered down a shaft or inclined plane. There was usually a cable drum or a chain basket on the axle of the wheel. It is essential that the wheel have braking equipment to be able to stop the wheel (known as a braking wheel). The oldest known drawing of a reversible water wheel was by Georgius Agricola and dates to 1556.

The Romans used waterwheels extensively in mining projects, with enormous Roman-era waterwheels found in places like modern-day Spain. They were reverse overshot water-wheels designed for dewatering deep underground mines.Vitruvius, including the reverse overshot water-wheel and the Archimedean screw. Many were found during modern mining at the copper mines at Rio Tinto in Spain, one system involving 16 such wheels stacked above one another so as to lift water about 80 feet from the mine sump. Part of such a wheel was found at Dolaucothi, a Roman gold mine in south Wales in the 1930s when the mine was briefly re-opened. It was found about 160 feet below the surface, so must have been part of a similar sequence as that discovered at Rio Tinto. It has recently been carbon dated to about 90 AD, and since the wood from which it was made is much older than the deep mine, it is likely that the deep workings were in operation perhaps 30–50 years after. It is clear from these examples of drainage wheels found in sealed underground galleries in widely separated locations that building water wheels was well within their capabilities, and such verticals water wheels commonly used for industrial purposes.

About the same time, the overshot wheel appears for the first time in a poem by Antipater of Thessalonica, which praises it as a labour-saving device (IX, 418.4–6).Lucretius (ca. 99–55 BC) who likens the rotation of the waterwheel to the motion of the stars on the firmament (V 516).central Gaul.Barbegal watermill complex a series of sixteen overshot wheels was fed by an artificial aqueduct, a proto-industrial grain factory which has been referred to as "the greatest known concentration of mechanical power in the ancient world".

The type of water wheel selected was dependent upon the location. Generally if only small volumes of water and high waterfalls were available a millwright would choose to use an overshot wheel. The decision was influenced by the fact that the buckets could catch and use even a small volume of water.

Overshot (and particularly backshot) wheels are the most efficient type; a backshot steel wheel can be more efficient (about 60%) than all but the most advanced and well-constructed turbines. In some situations an overshot wheel is preferable to a turbine.

The power is how fast that energy is delivered which is determined by the flow rate. It has been estimated that the ancient donkey or slave-powered quern of Rome made about one-half of a horsepower, the horizontal waterwheel creating slightly more than one-half of a horsepower, the undershot vertical waterwheel produced about three horsepower, and the medieval overshot waterwheel produced up to forty to sixty horsepower.

Adriana de Miranda (2007), Water architecture in the lands of Syria: the water-wheels, L"Erma di Bretschneider, pp. 48f, ISBN 978-8882654337 concludes that the Akkadian passages "are counched in terms too general too allow any conclusion as to the excat structure" of the irrigation apparatus, and states that "the latest official Chicago Assyrian Dictionary reports meanings not related to types of irrigation system".

Countries like Qatar, Luxembourg, and the United Arab Emirates are even bigger offenders than the United States. If everyone followed their rate of consumption, it would take somewhere around five-and-a-half to nine Earths to satisfy global needs. That said, these countries are much smaller than the United States, meaning their impact on global resource depletion carries less weight. Other major offenders include Denmark, South Korea, Germany, and China.