| 摘要 |
<p>PCT No. PCT/GB87/00536 Sec. 371 Date Jan. 25, 1989 Sec. 102(e) Date Jan. 25, 1989 PCT Filed Jul. 28, 1987 PCT Pub. No. WO88/00998 PCT Pub. Date Feb. 11, 1988.A pivoting handle type winder or door latch actuating handle (1, 2) and a pivoting stay type of window retaining latch (19, 20) for mounting on a movable frame of an openable door or window, and which is co-operable with a corresponding keeper on or in a surrounding fixed frame in order to latch the movable frame to the fixed frame. The latch comprises a latching element (23) which is movable into latching engagement with the keeper when the movable frame is in a closed position with respect to the surrounding fixed frame, and a locking mechanism is provided to lock the engagement of the latching element with the keeper. An elongate arm (1, 2; 19, 20) is coupled with the latching element, and at least two combinations wheels (9) are mounted on the elongate arm and arranged to control the operation of the locking mechanism so that the latch element can only be released from locking engagement with the keeper when a respective predetermined correct combination is set on each of the combination wheels. The arrangement of the combination wheels (9) on the elongate actuator handle arm (1, 2) and on the stay arm (19, 20) provides a secure mounting of the combination wheels, which cannot readily be interfered with by an intruder, and yet which provide an unobtrusive visual appearance, combined with easy manipulation by finger or thumb of an authorized user.</p> |
