Glossary of Terms
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Deadbolt (of a Lock)
A lock bolt having no spring acton nor bevel, and which is operated by a key or a turn piece.
- Related Categories –
- Hinges and Pivots
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Deadlock
A lock equipped with a dead bolt only.
- Related Categories –
- Locks, Cylinders, Cores, Keyblanks
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Deadlocking Latch Bolt
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.
- Related Categories –
- Hinges and Pivots / Latches, Catches and Bolts
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Dogging Device
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.
- Related Categories –
- Exit Devices
- Related Terms –
- Exit Device
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Door Closer or Check
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.
- Related Categories –
- Door Closers and Operators
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Door Holder
A device that holds a door open at selected positions.
- Related Categories –
- Hinges and Pivots
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Door Pivot
A hinging device embodying a fixed pin and a single joint. Most types include lateral fastening.
- Related Categories –
- Hinges and Pivots
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Door Stop
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.
- Related Categories –
- Hinges and Pivots
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Drivers
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.
- Related Categories –
- Locks, Cylinders, Cores, Keyblanks
- Related Terms –
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Dust-Proof Strike
A strike with a spring plunger that completely fills the bolt hole when the bolt is not projected.
- Related Categories –
- Locks, Cylinders, Cores, Keyblanks
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Dutch Door Bolt
Device for locking together the upper and the lower leaves of a Dutch door.
- Related Categories –
- Hinges and Pivots