It must describe ONLY the subject of the term. The term should not be used in the definition. If you have a technical objection to any definition, please bring it to the attention of the publisher of this listing, or a member of the LIST Council for review. The current glossary may be consulted online HERE . Frequently found in Life Safety and fire code requirements.
Most locks have a left contact point and a right contact point.
Usually used in pairs. Obtaining a single key in the system does not reveal the same secondary combination of all keys. Jr. The American inventor of the pin tumbler mortise lock and its replaceable cylinder component.