Claims
- 1. In combination a window sash lock keeper and window sash wherein said keeper comprises:a substantially planar back surface; and a slot extending at least partially across the substantially planar back surface wherein the slot provides a clearance for a possible burr or residual protrusion on the window sash.
- 2. The window sash lock keeper of claim 1 further comprising a generally rectangular cavity and at least one mounting screw through hole, wherein the generally rectangular cavity and the at least one mounting screw through hole each extends through the substantially planar back surface of the keeper.
- 3. The window sash lock keeper of claim 2 further comprising:at least one beam formed by at least part of a perimeter of the keeper and by the generally rectangular cavity, the at least one beam having a protrusion having dimensions and shape chosen so that the protrusion extends into the generally rectangular cavity and is capable of being captured by a mating sash lock.
- 4. The window sash lock keeper of claim 3 wherein the linear slot is parallel to the beam.
- 5. A method of mounting a window sash lock keeper to an extruded window component having a burr or residual protrusion thereon comprising:providing a clearance slot in a back surface of said keeper wherein said clearance slot comprises a width and depth which are chosen to accept a typical burr or residual protrusion on a mounting surface of the extruded window component; aligning said keeper and said extruded window component so that said keeper is located to mate properly with a mating window sash lock, said burr or residual protrusion is accepted by said clearance slot and a back surface of said keeper abuts a mounting surface of said extruded window component; securing said keeper to said extruded window component by mechanical fasteners passing through mounting screw holes in said keeper and through said extruded window component.
- 6. The method according to claim 5 wherein said mechanical fasteners comprise self-tapping sheet metal screws.
- 7. In combination a window sash lock keeper and window sash wherein the keeper comprises:a front surface and a substantially planar back surface; and a slot extending at least partially across the back surface wherein the slot provides clearance for a possible burr or residual protrusion on the window sash, and wherein the slot is located and oriented relative to a mounting position of the keeper and the possible burr or residual protrusion so that the slot is capable of providing clearance for the possible burr or residual protrusion.
- 8. The window sash lock keeper of claim 7 further comprising:a generally rectangular cavity extending through the front and back surfaces.
- 9. The window sash lock keeper of claim 8 further comprising:at least one beam formed by at least part of a perimeter of the sash lock keeper and at least partially defined by the generally rectangular cavity.
- 10. The window sash lock keeper of claim 9 wherein the beam comprises a protrusion that extends into the generally rectangular cavity to receive a window sash lock.
- 11. The window sash lock keeper of claim 9 wherein the slot is parallel to the beam.
- 12. The window sash lock keeper of claim 7 wherein the front and back surfaces of the keeper together define at least one mounting screw through hole.
- 13. The window sash lock keeper of claim 12 further comprising:a shelled volume located on the back surface proximate to and partially intersecting the linear slot.
- 14. The window sash lock keeper of claim 13 wherein the shelled volume defines at least one internal mounting screw through hole wall surrounding each mounting screw through hole.
- 15. The window sash lock keeper of claim 14 wherein the slot partially intersects the mounting screw through hole wall.
- 16. The window sash lock keeper of claim 7 wherein the sash lock keeper is rectangular in shape.
- 17. The window sash lock keeper of claim 16 wherein the sash lock keeper is a metal alloy casting.
- 18. The window sash lock keeper of claim 7 wherein the sash lock keeper is a metal alloy casting.
- 19. The window sash lock keeper of claim 7 wherein the thickness of the keeper is about 0.190 inch.
- 20. The window sash lock keeper of claim 7 wherein the width of the slot is about 0.212 inch and the depth of the slot is about 0.050 inch.
CROSS-REFERENCE TO RELATED APPLICATIONS
This application claims the benefit of U.S. Provisional Application No. 60/172,886, filed Dec. 20, 1999.
US Referenced Citations (6)
Non-Patent Literature Citations (1)
Entry |
Drawing No. 9891 entitled “Keeper,” by Allen-Stevens Corp., dated Apr. 5, 1994. |
Provisional Applications (1)
|
Number |
Date |
Country |
|
60/172886 |
Dec 1999 |
US |