| Glossary of Terms |
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- Backset:
The term backset is used to explain the distance from the edge of the door to the center of the
hole drilled for your knob, lever or deadbolt.
Ballcatches:
Item of hardware inserted into hole drilled into top of door. Used where door is opened by pulling
or pushing it only. In double doors, they are used with dummy pairs of levers or knobs. They
also can be used in the top of a small closet where pull may be used. The ball is pushed by
spring tension into notched brass plate in jamb above door.
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- Bore:
Bore is the diameter of the hole drilled in a door for a knob, lever or deadbolt
Dummy Pairs:
Dummy pairs are for doors where no latches are needed. These knobs or levers do not
turn. They can be split up for bi-fold door set, since no hardware is needed on back of
the bi-folds. Dummy pairs can also be used on double french door units, where
ballcatches are used to hold doors in place. Dummy Pairs do not require a standard hole
to be drilled, since most are attached from each side of the door.
Flush Bolts:
Bolts mounted in a door to lock a door in place. These bolts slide up into the jamb above
the door, and down into the threshold or floor below door. These are used primarily on
double doors, where one door is lacked in place and the other door is the one mainly
used. When needed, the door locked in place can be opened. Flush bolts can also be
called slidebolts, which are mounted to the face of the door. Flush bolts are mounted
flush with the edge of the door.
Jamb:
The wood that surrounds the door, and which the hinges are attached to on one side, and which the latch goes into on the other side of the door.
Keyways:
The part of the lock mechanism where the key is inserted. Can be changed if needed for security
reasons, or changed also if wanted for ease of use, where more than one lock is in existence,
and you want all the locks to take the same key.
Latch:
The latch is the part of the door hardware that moves with the turn of a knob or lever. It slides
into the latch plate attached to the door jamb, and holds the door shut or opens it.
One-Quarter Inch Radius Corners:
Round corners on hardware, which may be on hinges, or other hardware items, such as ballcatches. This is one of the three standard corners on a door hinge. The other two comers are 5/8" radius and square comers. For ease of use in machining, round corners are normally used, and our company prefers 1/4 radius where possible, and the square corners otherwise.
5/8" radius |
1/4 radius
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Passage:
Passage knobs or levers are for doors that do not
need to be locked, such as a closet or doors
between rooms and family rooms or living rooms.
Privacy:
Privacy knobs or levers are used on doors where locks are needed, such as on bathrooms, or
bedrooms on interior doors.
Strike Plate:
Plate attached to door jamb, which receives the latch, when the knob or lever is tumed, allows the door to be closed or opened.
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