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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

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

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Ostini said he's never had the opportunity to give the wine part of the business "it's just due." But with a recent expansion of the Hitching Post property, from one acre to 12 acres, he said they can now let the winemaking story take front and center at the tasting room while continuing to focus on food service at the restaurant.
Those additional 12 acres included a preexisting mid-century cottage, which has been transformed into the Hitching Post Wines tasting room.
In 1995, Alabama was the only state that allowed the practice of handcuffing inmates to a hitching post (also referred to in Alabama Department of Corrections regulations as a restraining bar) if an offender refuses to work or disrupts a work squad.
A series of lawsuits had resulted in federal court rulings that Alabama's use of the hitching post violated Eighth Amendment standards, and DOJ investigations in 1993 and 1994 had concluded that the systematic use of the post constituted improper corporal punishment.
The Court of Appeals for the Eleventh Circuit affirmed, finding that while using the hitching post in that manner for punitive purposes violated the Eighth Amendment, the guards still were entitled to qualified immunity because the unconstitutional conduct was not clearly established.
He was handcuffed to the hitching post, already subdued, handcuffed, placed in leg irons, and transported back to prison.
In 16 (59%) of the 27 reported incidents, improper hitching of equipment or material for towing was believed to be the primary cause of the rollover; 10 (63%) of these 16 rollovers resulted in fatalities.
In each of the 16 rear rollovers attributed to improper hitching, attachment of the tow chain to a point above the drawbar was the principal cause of the rollover.
And for many, the reasons so few of us now thumb a lift run deeper than the simple expansion in car ownership and a safety-obsessed culture: hitching was one of the last vestiges of the war spirit, a sort of neighbourliness on the roads that's vanished with the values that gave rise to it.
Mr King, who hitched not only here but also in Europe and America, added: "If she saw teenage boys hitching between the villages my mother would always stop and give them a lift because she kind of knew it could be one of us.
A prisoner who had been placed in a horizontal restraint device known as the hitching post" sued officials claiming violation of his Eighth Amendment rights.