Glossary of Terms

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D

  1. 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
  2. Deadlock

    A lock equipped with a dead bolt only. 

    Related Categories –
    Locks, Cylinders, Cores, Keyblanks
  3. 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.

  4. 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
  5. 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
  6. Door Holder

    A device that holds a door open at selected positions. 

    Related Categories –
    Hinges and Pivots
    Related Terms –
    Door Pivot
    Door Stop
  7. Door Pivot

    A hinging device embodying a fixed pin and a single joint. Most types include lateral fastening. 

    Related Categories –
    Hinges and Pivots
    Related Terms –
    Door Holder
    Door Stop
  8. 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
    Related Terms –
    Door Holder
    Door Pivot
  9. 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 –
  10. 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
    Related Terms –
    Electric Strike
    Strike
    Strike Box
  11. Dutch Door Bolt

    Device for locking together the upper and the lower leaves of a Dutch door. 

    Related Categories –
    Hinges and Pivots
Glossary
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