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Coffin lock is a slang term for a blind panel connector (also called a butt-joint fastener) often used in
Coffin lock is a slang term for a blind panel connector (also called a butt-joint fastener) often used in scenic construction
Scenic may refer to:
* Scenic design
* Scenic painting
* Scenic overlook
* Scenic railroad (disambiguation)
* Scenic route
* Scenic, South Dakota, United States
* Scenic (horse), a Thoroughbred racehorse
Aviation
*Airwave Scenic, an Austrian par ...
to join together stage decks or scenery
Theatrical scenery is that which is used as a setting for a theatrical production. Scenery may be just about anything, from a single chair to an elaborately re-created street, no matter how large or how small, whether the item was custom-made or ...
in a butt joint
A butt joint is a technique in which two pieces of material are joined by simply placing their ends together without any special shaping. The name "butt joint" comes from the way the material is joined. The butt joint is the simplest joint to ma ...
. These are two part connectors (male and female) that draw together and lock. The two most common types are the cam
Calmodulin (CaM) (an abbreviation for calcium-modulated protein) is a multifunctional intermediate calcium-binding messenger protein expressed in all eukaryotic cells. It is an intracellular target of the secondary messenger Ca2+, and the bind ...
and acceptor and more traditional hook and pin version. These devices generally use a hex key
Hex keys of various sizes
Socket head screws of various sizes
A hex key (also, hex wrench, Allen key and Allen wrench) is a simple driver for bolts or screws that have heads with ''internal'' hexagonal recesses (sockets).
Hex keys are form ...
to operate the locking mechanism via a small diameter hole either through the face or rear of the panel. When locked, the considerable mechanical advantage
Mechanical advantage is a measure of the force amplification achieved by using a tool, mechanical device or machine system. The device trades off input forces against movement to obtain a desired amplification in the output force. The model for t ...
offered by the cam or hook holds the panels tightly together. 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. Many small theatres use stock platforms with coffin locks built into the frames.
References