Search results
Results from the WOW.Com Content Network
The first known example of a tumbler lock was found in the ruins of the Palace of Khorsabad built by king Sargon II (721–705 BC.) in Iraq. [1] Basic principles of the pin tumbler lock may date as far back as 2000 BC in Egypt; the lock consisted of a wooden post affixed to the door and a horizontal bolt that slid into the post.
Dainese D-air is an electronically actuated airbag system developed for motorcyclists. Development began in 1995 and the first working prototype was tested on a race track in 2000. Dainese D-air activated for the first time in an official race when the Italian rider Simone Grotkyj crashed during a 2007 MotoGP practice session at the Valencia ...
Some taper pins have a male screw thread on the small end that is designed to project through the hole and retain the pin with a washer and a nut.Other pins are threaded on both ends, on the thick end to pull the pin out with the same nut that holds the pin in place.
A safety wire is used to ensure proper security for a fastener. The wire needed is long enough to reach from a fixed location to a hole in the removable fastener, such as a pin — a clevis fastener, sometimes a linchpin or hitch-pin through a clevis yoke for instance — and the wire pulled back upon itself, parallel to its other end, then twisted, a single end inserted through a fastener ...
A split pin, also known as a cotter pin, or cotter key in the US, [1] is a metal fastener with two tines that are bent during installation, similar to a staple or rivet. Typically made of thick wire with a half-circular cross section, split pins come in multiple sizes and types.
Thus locksmithing, as its name implies, is the assembly and designing of locks and their respective keys by hand. Most locksmiths use automatic and manual cutting tools to mould keys; most are power tools having battery or mains electricity as their power source.
Lock and key, a mechanical device used to secure items of importance; Lock (firearm), the ignition mechanism of small arms Lock (water navigation), a device for boats to transit between different levels of water, as in a canal
Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Help; Learn to edit; Community portal; Recent changes; Upload file