Component on a boat trailer that connects to the hitchball.

or Coupling – These tubing connectors are available in barbed, compression or Perma-Loc. Commonly, a coupler attaches two sections of like-sized tubing to one another. Some connect different types of [..]

See directional coupler.

the female portion of the cam & groove connection with the cam arms.

A chemical incorporated into the emulsion of color film stocks which produces a dye image associated with the developed silver image.

(n) a mechanical device that serves to connect the ends of adjacent objects

A device that connects three or more fibre ends, dividing one input between two or more outputs or combining two or more inputs into one output.

An appliance for connecting cars or locomotives together.  Government regulations require that these must couple automatically by impact and must be uncoupled without going between the cars.

A coupler allows one division to be connected to another. This allows the stops of two divisions to be controlled by one manual or the pedals. For example, the Swell to Great coupler allows the Great [..]

The mechanism for joining two rail vehicles together. coupler carrier: The horizontal bracket on the headstock of the rolling stock which supports the coupler shank. coupler head shelf: A horizontal l [..]

A part which connects two moving parts to relay the motion.

1. Device, especially in a photoplayer or pipe organ, which permits the operator (or a music roll) to couple and uncouple at will additional pipe ranks or sections of the instrument. Specific couplers [..]

A mechanism for connecting rolling stock in a train.

chemical present in different forms in all three layers of substantive color or a chemical incorporated into a developer.

a devise for attaching the tongue of a trailer to the hitch of a vehicle

Coupler: A plastic adapter for pastry bags that allows pastry tips to be changed.

The part of a trailer A-frame that attaches to the hitch ball.

A device for mechanically joining two linear components like pipes, scaffold tubes, or a drill bit with an extension.

lang=en * year=2008 |article=NS Class 1700 |passage=Most visual difference between the 1700 and 16/1800 series is the automatic coupler on the 1701-1731 subseries.

(now,_|rare) Someone who couples things together, especially someone whose job it is to couple railway carriages. Anything that serves to couple things together; but especially a device that coupl [..]