| 摘要 |
A power-operated latch is integrated to a casement window for selectively locking and unlocking a vertically hinged window sash. The power-operated latch is adapted to be concealed in the window frame and is directly connectable to the existing window latch hardware. A reversible rotary motor drives a vertically supported lead screw on which a slider is threadably engaged for selectively raising and lowering a longitudinally movable latch bar.
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