| 摘要 |
<p>This invention provides a door lock having a non-rotatable door knob of hollow construction housing a lock-operating mechanism so arranged that the associated latch can be retracted by depressing a spring-loaded push-button mounted on the knob and projecting laterally outside the circumference of the knob. A complementary operating arrangement may be provided for a knob mounted on the other side of the door.</p> |
