Closer for sheet metal locks

摘要

A closer is provided for use with a sheet metal lock. The lock is of substantially U-shaped cross-section and has parallel inner and outer legs and an intermediate leg joining said inner and outer legs about at right angles thereto. The closer has a stationary plate adapted to abut the intermediate leg. The stationary plate is provided with a first edge. The closer also has a movable plate adapted to abut the outer leg. The movable plate is provided with a second edge. A hinge connects the stationary and movable plates for relative swinging movement about an axis approximately coincident with the edges. An actuating mechanism has a cylinder fixed to the stationary plate and provided with a hand grip. A piston reciprocable in the cylinder is connected to the movable plate for swinging the movable plate through about ninety degrees toward the stationary plate under gas pressure controlled by a valve on the hand grip. A spring returns the piston and movable plate to original position. There is a tooth upstanding from the stationary plate adapted to abut the inner leg of the lock.