Hitch


Also found in: Dictionary, Thesaurus, Medical, Acronyms, Idioms, Wikipedia.

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 It might be outdated or ideologically biased.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 ?
Many Model 3 owners were tempted to opt for a third-party hitch. But the risk of road accidents and clashing with the manufacturer's warranty as no towing rating capacity would be specified by a producer.
A judge, Recorder Gurdial Singh, said: "The report says that everything is going well on the order in terms of his compliance, save for this particular aberration." He told Hitch: "I think this is your third breach.
After a number of refinements, the first Quick Hitch was launched 20 months ago.
FILE PHOTO: A man is seen in front of a Didi sign before a promotional event of its Hitch service for the Spring festival travel rush, in Beijing, China January 24, 2018.
"With a 9-horse hitch, the distance from the plow seat to the head of the lead horses is some 40 feet," Alan says.
15) Once you've secured the locking hitch, tie the two strands of thread together.
Trailer attaching systems include a hitch and mount for the tow vehicle, and a matching coupler on the trailer's tongue.
Theirs was more of a professional relationship than a passionate one, with Alma reluctantly putting up with Hitch's predilection for beautiful blondes while flirting herself with writer Whit-field Cook (Danny Huston).
Hitch and Alma are gifts for Sir Anthony Hopkins and Dame Helen Mirren to play in the story about creating his biggest hit.
IT'S time to economically value the greenhouse gas-trapping potential of mine waste and start making money from it, says mining engineer and geologist Michael Hitch of the University of British Columbia (UBC).
STV had them ready to go online - but a "technical hitch" meant all four were published at the same time.