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2. Janney coupler - Wikipedia

   en.wikipedia.org/wiki/Janney_coupler

   Major Eli Janney, a Confederate veteran of the American Civil War, invented the semi-automatic knuckle coupler in 1868. It automatically locks the couplers on cars or locomotives together without a rail worker having to get between the cars, and replaced the link and pin coupler, which was a major cause of railroad worker injuries and deaths.

3. Tightlock coupling - Wikipedia

   en.wikipedia.org/wiki/Tightlock_coupling

   Like all Janney couplers, the Tightlock is "semi-automatic". The couplers automatically lock when cars are pushed together, but workers must go between cars to hook up the air lines for the pneumatic brakes and connect cables for head-end power and other communications. To separate cars, a worker must use a lever to move the locking pin that ...

4. Master Lock - Wikipedia

   en.wikipedia.org/wiki/Master_Lock

   Master Lock is an American company that develops padlocks, combination locks, safes, and related security products. Now a subsidiary of Fortune Brands Innovations, Master Lock Company LLC was formed in 1921 by locksmith -inventor Harry E. Soref and is headquartered in Oak Creek, Wisconsin. [1][2][3] In 1970 the company was purchased by American ...

5. Fifth-wheel coupling - Wikipedia

   en.wikipedia.org/wiki/Fifth-wheel_coupling

   Fifth-wheel coupling. The fifth-wheel coupling provides the link between a semi-trailer and the towing truck, tractor unit, leading trailer or dolly. The coupling consists of a kingpin, a 2-or- -inch-diameter (50.8 or 88.9 mm) vertical steel pin protruding from the bottom of the front of the semi-trailer, and a horseshoe-shaped coupling device ...

6. Master keying - Wikipedia

   en.wikipedia.org/wiki/Master_keying

   Master key turning a pin tumbler lock with two shear points. A master key operates a set of several locks. Usually, there is nothing different about the key. The differences are in the locks the key will operate. These master-keyed locks are configured to operate with two, or more, different keys: one specific to each lock (the change key ...

7. Lockrod - Wikipedia

   en.wikipedia.org/wiki/Lockrod

   A lockrod assembly consists of top & bottom cams that are welded to the rod/stick of tubing itself, along with a handle assembly. Keepers (usually sold separately), are the part that accepts the cam, and can be welded or bolted onto the end frame of the trailer and remain stationary to the endframe. Mounting hardware attaches the lockrod to the ...