| 摘要 |
A window securing device (36) for use in a double-hung sash window assembly having upper and lower sash window frames (14,16) installed for relative overlapping vertical sliding movement, said upper sash frame (14) having a recess into the interior of a vertical facial member of the window. The device (36) includes a housing (38) having a front faceplate opening (51) into a cavity (50) therein and a means for retaining the housing (38) in the recess with the faceplate (42) covering the edges of the recess. A pawl (40) mounted in the cavity (50) of the housing (38) is spring biased into an extended position where the lowermost arresting edge protrudes through the opening (51). In effect, the extended pawl (40) blocks the pathway of a top portion of the lower sash (16) for preventing further upward movement thereof. With the pawl (40) in the extended position, the uppermost contact edge (46) of said pawl (40) is configured for abutting against an inside edge (52) of the top of the opening (51) in said faceplate (42). A substantial portion of the upward force associated with the lifting of the lower sash (16) against the arresting edge is transferred into the upper sash frame for enhanced resistance.
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