| 摘要 |
A removable and concealable lock for sliding sash windows has two parts-a solid cylindrical bolt and an extractor pin. The extractor pin is an elongated pin with grasping means at one end and a perpendicular bend at the opposite end. The bolt has a longitudinal channel in at least one end with at least one radial channel leading into the inner end of the longitudinal channel. The other bolt end is either tapered or greatly bevelled for easy insertion into predrilled window channels. The window channels are drilled through the overlapping rails or stiles of the window sashes. The bolt is inserted into the channels to lock the window in either an open or closed position. To remove the lock, the extractor pin is inserted into the longitudinal channel until its bent end locks into a radial channel. The pin then pulls the bolt from the channel.
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