Which term describes a device made up of linkages and bars that opens a door from the inside?

The term that describes a device made up of linkages and bars that opens a door from the inside is panic hardware. Panic hardware is specifically designed to allow quick and easy egress during emergencies, enabling people to exit a building without having to use a traditional key or handle, which can become problematic in high-stress situations. This type of hardware often features a push bar mechanism that connects to a series of internal levers and linkages, making it easy to open the door with minimal effort.

Understanding panic hardware is vital, especially in fire safety and emergency preparedness contexts, where rapid evacuation can be critical. While other options might relate to door mechanisms or security in some way, they do not encapsulate the function and design of a device specifically engineered for emergency exits.