1) The Egyptians, Romans, and Greeks are credited with inventing the oldest known type of locks.
2) Here are six types of keys: bit, barrel, flat, corrugated, tubular lock, and cylinder.
3) The corbin key has a bitting cut at 20-degree angles.
4) Locks are named after their uses, appearances, major security features, installation method, internal construction, technology or manufacturer. Examples include the trailer lock, bicycle lock, interlocking dead lock, deadbolt lock, and the rim lock (I laughed at that one... rim. ha.)
5) The Master keying pin tumbler locks means a combination other than the change key will raise the pins to the shear line.
Example:
- Since there are three grooves in the master key, five master pins are needed in order for the key to turn.
1 comment:
:) :) :)
that'll do, pooper. that'll do.
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