Views of a few types of coffin lock

Coffin Lock is a slang term for a blind panel connector (also called a Butt-Joint Fastener) often used in performing arts to join together stage decks or scenery in a butt joint or cabinet and lid locks on road cases. The performing arts are those forms of Art which differ from the Plastic arts insofar as the former uses the artist's own Body, Face and presence Theatrical scenery is that which is used as a setting for a Theatrical production A butt joint is a joinery technique in which two members are joined by simply butting them together These are typically two part connectors (male and female) that draw together and lock. The two most common types are the cam and acceptor (sold under the trade name "Roto-Lock") and more traditional hook and pin version. A cam is a projecting part of a rotating Wheel or shaft that strikes a Lever at one or more points on its circular path These devices generally use an Allen key to operate the locking mechanism via a small diameter hole either through the face or rear of the panel. A hex key, also known as an Allen, Alum, hex-head, or zeta key or wrench is a Tool used to drive Screws and bolts When locked, the considerable mechanical advantage offered by the cam or hook holds the panels tightly together. In Physics and Engineering, mechanical advantage (MA is the factor by which a mechanism multiplies the force put into it Coffin locks can be installed directly into a mortise cut into each panel, for total concealment except for the locking hole, or mounted to the rear of the panels. Simple and strong the mortise and tenon joint has been used for millennia by Woodworkers around the world to join pieces of Wood, usually when the pieces