Updated About encyclopedia.com content Print Article
cremone, cremorne. Casement bolts with a rack-and-pinion mechanism controlled by a rotary handle: two sliding rods, fixed to one leaf of e.g. a French window, are moved up and down in opposite directions into sockets in a frame in order to lock it. A variant is called the espagnolette, where the bolt-rods have hooks on the ends that engage in slots at the top and bottom of the main frame, locking and tightening the opening-light.