A lock bolt having no spring acton nor bevel, and which is operated by a key or a turn piece.
A lock equipped with a dead bolt only.
A latch bolt incorporating a plunger that is held in a retracted position when a door is dosed, thus preventing the bolt from being retracted by end pressure.
As used in exit devices, a mechanism that secures the cross bar in the fully depressed position and also retains the latch bolt or bolts in a retracted position, thus permitting free operation of the door from either side.
A device combining a spring for closing and a compression chamber into which liquid or air escapes slowly, thus providing a means of controlling the speed of the closing action.
A device that holds a door open at selected positions.
A hinging device embodying a fixed pin and a single joint. Most types include lateral fastening.
A device to stop the swing or movement of a door at a certain point. Also an architectural term defining that part of a door frame against which the door closes.
The upper set of pins in a pin tumbler cylinder, which, activated by the springs, project into the plug until raised by insertion of the key.
A strike with a spring plunger that completely fills the bolt hole when the bolt is not projected.
Device for locking together the upper and the lower leaves of a Dutch door.