Claims
- 1. In combination with a double-hung window having a upper and a lower sash mounted for sliding vertical movement relative to each other, said upper and lower sashes having each respectively horizontal upper and lower and vertical side rails, a ventilation stop mounted to a side rail of the upper window sash a predetermined distance above the upper horizontal rail of the lower sash, said stop comprising a generally rectangular mounting plate, means for securing said mounting plate in a normally installed position to said side rail such that a section of said mounting plate extends from said side rail generally parallel to and above said upper horizontal rail, said section having an upper horizontal edge in said normally installed position, a wedge support plate hinged along one edge to the upper horizontal edge of said section about a horizontal axis to alternately depend therefrom inwardly and toward said lower sash in its operative position, a generally rigid wedge-shaped member attached to said wedge support plate, said wedge-shaped member defining a planar surface connected to said wedge support plate and projecting inwardly therefrom in its operative position such that a part of said planar surface lies toward and into the path of the upper horizontal rail of the lower sash during relative movement between the upper sash and the lower sash thereby effecting a stopping and jamming action of said horizontal rail against said planar surface, said wedge support plate being adapted to be swung about the upper horizontal edge of said section up and over said section to be inclined away from the path of said lower sash sufficiently to prevent said wedge support plate from moving into the operative position during normal movements of said sash, and means limiting the inclination of said wedge support plate in said inoperative position.
- 2. The ventilation stop according to claim 1 wherein said upper sash includes a pane of glass adjacent to said side rail and said means limiting movement of said wedge support plate is said pane of glass.
- 3. The ventilation stop according to claim 1 wherein a member is mounted upon said section to project therefrom toward said wedge to limit movement of said wedge away from said path in the inoperative position.
RELATED APPLICATIONS
This application is a continuation-in-part of application Ser. No. 765,632, filed Feb. 4, 1977, now U.S. Pat. No. 4,103,947.
US Referenced Citations (11)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
765632 |
Feb 1977 |
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