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European rolling stock tend to use buffers and chain couplers while American rolling stock uses a Janney coupler or "knuckle coupler". These are incompatible with each other, but where some railroads have obtained older, less expensive used rolling stock from different countries or regions, instead of having to standardize on one form of ...
The diagram from Beard's 1897 coupler patent [1]. Janney couplers were first patented in 1873 by Eli H. Janney (U.S. patent 138,405). [2] [3] Andrew Jackson Beard was amongst various inventors that made a multitude of improvements to the knuckle coupler; [1] Beard's patents were U.S. patent 594,059 granted 23 November 1897, which then sold for approximately $50,000, and U.S. patent 624,901 ...
A rolling-block action is a single-shot firearm action where the sealing of the breech is done with a specially shaped breechblock able to rotate on a pin. [1] The breechblock is shaped like a section of a circle. The breechblock is locked into place by the hammer, therefore preventing the cartridge from moving backward at the moment of firing.
A knuckle joint on a locomotive, seen behind the pin joint of the eccentric crank. Ball-point pen included for size. A mechanical joint is a section of a machine which is used to connect one or more mechanical parts to another. Mechanical joints may be temporary or permanent; most types are designed to be disassembled.
The hammerless repeating rifle is a firearm that operates without any external hammer or firing pin. [4] Hammerless firearms do not use a firing pin. This device was first introduced in 1879 with the Climax Safety Hammerless Gun, which was developed in order to prevent accidents from occurring while firing a weapon with a worn hammer/ firing ...
Manual card imprinter Another type of manual card imprinter (Janome M220) with a smaller sliding handle. A credit card imprinter, colloquially known as a ZipZap machine, click-clack machine or Knuckle Buster, is a manual device that was used by merchants to record credit card transactions before the advent of payment terminals.
From the top: striker-fired, linear hammer with free-floating firing pin, hammer-fired with free-floating firing pin, and hammer-fired with integral firing pin. The hammer is a part of a firearm that is used to strike the percussion cap/primer, or a separate firing pin, [1] to ignite the propellant and fire the projectile. It is so called ...
It is one of the most famous coin manipulation feats. It is also known as the coin roll, knuckle roll, and the steeplechase flourish, and can also be performed with poker chips, slugs, or other similar implements. The manipulation is generally performed on the first phalanx bone of each finger of one hand. After the coin has been flipped over ...