Abstract: A snap in latch assembly for selectively locking a movable member to a fixed member and preferably for locking double hung windows includes a keeper which would be secured to the hollow rail forming the frame of the fixed sash. A latch housing would be secured to the hollow rail forming the frame of the movable sash. Both the keeper and latch housing are secured to their respective rails in a snap in manner without the use of fasteners such as rivets or screws. The keeper includes at least one retainer pin having an undercut for snapping into a slot in its rail and includes at least one anchor member for engagement with the rail when the keeper is slid to its mounted position. The latch housing includes at least one retainer arm having an undercut for snapping into a slot in its rail with at least one locator bar engaging the rail when the housing is slid to its mounting position.

Abstract: Various structures exist which require an element to be turned in a certain direction. The turning is accomplished by a programmable controlled winder which includes a motor driven tool in association with a computer for automatically stopping the rotation after a pre-set number of rotations have been made.

Abstract: A window frame is made of a plastic material which is secured together by utilization of corner key pieces at each of the four corners joining the header and the sill with a pair of jambs. The corner key pieces may be initially stapled or screwed to the frame members to create a stable unit prior to the permanent securement of the various members by means of ultra-sound welding.

Abstract: A window frame made, for example, of a vinyl material is secured together by the utilization of corner key pieces at each of the four corners joining the header and the sill with a pair of side frames. After the frame pieces have been assembled they are permanently secured by the use of ultra-sound welding.

Abstract: A securing device for casement windows or the like includes an abutment member secured to the master frame in the path of motion of an engaging member. The abutment member extends away from the master frame a greater distance at the end of the abutment member nearer to the inner side of the window. The engaging member is mounted to the casement frame and extends away from the casement frame a greater distance at its side closer to the outside of the window. Both the abutment member and engaging member include non-planar contacting surfaces which mate when the window is in its closed position. This arrangement of the abutment member and engaging member also prevents the casement frame from bulging away from the master frame under wind pressure. The securing device is mounted along one side of the window.