| GLOSSARY OF LOCKWORDS ALSO SEE IDENTIFICATION OF LOCK PARTS
BACKSET: Distance from lock trim face to
centerline of cylinder and/or lock hub. (Always measured from the center of the lock
face.)
BOLT: Projectable member of lock or latch
mechanism which engages door frame and strike. DEADBOLT: Bolt which has no automatic
spring action and which is operated (both projected and retracted) by key cylinder or
lever handle. LATCHBOLT: A bevelled spring-loaded bolt that automatically seats in strike
on contact. Retracted by key cylinder or lever handle.
CASE: Housing for lock or latch mechanism.
CYLINDER: Housing containing a tumbler
mechanism and a keyway plug which can be turned only by the correct key. Included a cam or
spindle to transmit rotary action to a lock or latch mechanism. For security and
keying versatility, authorities generally specify a pin tumbler cylinder of no less than 5
pins. These are available in the Mortise cylinder (round, threaded housing) or the Bored
lock cylinder (sometimes called a cylinder "insert") . Both types offer the same
functional value of security and convenience and are often included in the same keying
system. (See Keying).
CAM: A rotating eccentric piece attached
to the end of a cylinder plug to actuate a lock or latch mechanism. LAZY CAM OR LAZY
SPINDLE: A "lose motion" cam or spindle that rotates less than 360º when key
and plug are rotated a full turn.
ESCUTCHEON: Trim plate or lever handle
mounting plate.
FACEPLATE: A lock's trim plate n nose of
door. Must be flat, radiused (standard 2-5/8" r.) or bevelled (standard 1/8" in
2") to match door edge. ARMORED FACEPLATE: Faceplate that protects cylinder set
screws.
HAND OF DOOR: The description of swinging
door operation. Always viewed from outside the room, building, closet, etc. LEFT HAND:
Door hinges on left. RIGHT HAND: Door hinges on right.
INTERLOCKER: Flange on meeting
stiles of sliding and stationary panels to provide a weathertight seal when door is
closed.
KEEPER: Synonymous with Strike.
KEYING: Pin-tumbler cylinder offer the
possibility of very complex keying arrangements. These are the basic terms. INDIVIDUAL
KEY: key for an individual cylinder. KEYED ALIKE: All cylinders may be operated by same
key. (Not to be confused with Master keyed) KEYED DIFFERENT: Different individual key
operates each cylinder (or group of cylinder). MASTER KEY: All cylinders in a group
can be operated by one maser key, although all cylinders may be keyed different. (Not to
be confused with Keyed alike).
LATCH: Device for automatically retaining
door in closed position upon its closing. Requires actuation to retract its bolt.
DEADLATCH: A latch in which the latchbolt is positively held in projected position
by an auxiliary mechanism.
LOCK: Device for securing door in closed
position against unauthorized or forced entry. Requires actuation to project or to retract
its bolt. DEADLOCK: Lock in which the bolt is positively held in projected position.
PULL: A grip or handle fastened to
the door to facilitate pulling it open. FLUSH PULL: A recessed cup type pull, mortised
into a sliding door.
SLIDE OF DOOR: Comparable to
"hand" of a swinging door. Symbols "X" for sliding panel and
"O" for stationary panel denote slide direction to open as viewed from outside
of door.
STRIKE: Plate mortised into or mounted on
door jamb to accept and restrain bolt. In some metal installations of a deadlock the
strike may be simple an opening cut into jamb. (Synonymous with Keeper.)
SPINDLE: A bar connected to cylinder plug
or turn piece to provide rotary actuation to a lock or latch mechanism.
THUMBTURN: Small lever handle (usually for
infrequent or emergency use only). |
