| 摘要 |
<p>A mortise lock case having a body including top and bottom walls and an angularly adjustable front attached to the body by upper and lower tabs carried by the front and secured, respectively, to the top and bottom walls by associated fasteners. The top and bottom walls have integral forwardly projecting tongues received in associated slots in the front. Each tongue has fulcrums at its opposite sides engageable with the side walls of the slot in which it is received. Each fulcrum cooperates with an associated slot side wall to provide pivotal support for the front whereby to facilitate angular positioning of the front relative to the body of the case.</p> |
