Hitch


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hitch

[hich]
(geology)
A fault of strata common in coal measures, accompanied by displacement.
A minor dislocation of a vein or stratum not exceeding in extent the thickness of the vein or stratum.
(mining engineering)
A step cut in the rock face to hold timber support in an underground working.
A hole cut in side rock solid enough to hold the cap of a set of timbers, permitting the leg to be dispensed with.

Hitch

 

in agriculture, a device for attaching several machines to a tractor in order to use the pulling force of the tractor efficiently and to increase the productivity of the unit. Hitches may be general-purpose, special-purpose, trailer, semimounted, or mounted.

General-purpose trailer hitches are used to connect tractors with trailed machines. They consist of two or three beams equipped with extension arms and support wheels and hinged to follow the terrain irregularities better. The machines and extension arms are attached to the beams with clamps that can be moved to ensure correct positioning of the machines or equipment in the unit. The hitch has a tongue for attachment to the tractor. Special-purpose hitches do not usually have wheels; they are composed of links that join the machines to each other, as in plowing combines.

Semimounted hitches are used to attach a tractor to a unit of three mounted machines, each with a working width of 1.8–2.8 m. One machine is fitted to the mounting system of the tractor, and the two others are attached to side mountings on the hitch, similar to the tractor’s own mounting system. Each mounting on the hitch is equipped with a hydraulic cylinder that is operated by the tractor’s hydraulic system; it is used only for lifting the mounted machine. The machine is lowered by its own weight. The proper spacing of machines with different working widths can be achieved by moving the carriage of the hitch’s mounting mechanism along the beam.

A general-purpose hitch can be used to mount harrow units on tractors of small and medium capacity. The harrow units are attached to the post and brackets of the mounting by means of a hinged brace, two long chains, and one short chain. In order to mount harrow units of different working widths, the brackets of the mounting are moved along the beam. One hitch beam can carry three toothed harrow units or two latticed harrow units. A hitch beam may be extended by inserting two tubes in openings in both sides of the beam. The tubes are smaller in diameter than the beam and are welded to brackets for mounting one toothed harrow unit each, for a total of five harrow units.

A. D. UGAROV

References in classic literature ?
Elder Hitch, as is seen, was trying to make proselytes on the very railway trains.
Several of the audience, not being much interested in the missionary's narrative, here left the car; but Elder Hitch, continuing his lecture, related how Smith, junior, with his father, two brothers, and a few disciples, founded the church of the "Latter Day Saints," which, adopted not only in America, but in England, Norway and Sweden, and Germany, counts many artisans, as well as men engaged in the liberal professions, among its members; how a colony was established in Ohio, a temple erected there at a cost of two hundred thousand dollars, and a town built at Kirkland; how Smith became an enterprising banker, and received from a simple mummy showman a papyrus scroll written by Abraham and several famous Egyptians.
And this," added Elder William Hitch, "this is why the jealousy of Congress has been aroused against us
A vulgar spectator might deem it stiff--he might call it a hitch and jerk--but, to my eye, it hath an unspeakable majesty, and must have been acquired by constant observation of the deportment of the Grand Monarque.
When the wind changes they hitch on some donkeys and actually turn the whole upper half of the mill around until the sails are in proper position, instead of fixing the concern so that the sails could be moved instead of the mill.
but a new idea, and I have dozens of them," said Joe; "if we could only manage to capture a team of live eagles, we could hitch them to the balloon, and they'd haul us through the air
Epanchin's invariable fussiness and anxiety, there could not be the slightest hitch in the simplest matters of everyday life, but she immediately foresaw the most dreadful and alarming consequences, and suffered accordingly.
Complicated as it was, it was carried through without a hitch, and as a very creditable achievement it cheered us on in our work.
I had not seen him for so long, and the thought of a possible hitch or error in our plans that would keep him still in his island prison almost drove me mad.
He would advance his fore legs and drag up his body with a sort of hitching movement, when he would advance his fore legs and hitch ahead again for a few more inches.
Almost before I knew it, and without one serious hitch, I had the mainmast stepped.
As to paying the money down, there'll be no hitch there.