Abstract: A sweep lock locking the check rails of an upper and lower sash improves window resistance to negative wind force. The lock accomplishes this by a cam with a locking rim that extends both upward and downward to engage cam receiver projections above and below the locking rim to lock along two vertically separated locking lines, which tends to resist sash tilting from vertical as sash are deformed in response to negative wind force. Preferred embodiments of a cam lock and mounting hub include a two-piece hub that snaps together within a rotational opening of the cam lock to form a subassembly ready for mounting.

Abstract: A cable actuator for a casement sash includes a cable engager that moves against an opening pull cable and diverts the cable to an elongated path when the sash is closed. When the opening pull cable is tensioned to open the sash, this moves the cable back to a shorter tensioned path that moves the cable engager in a way that initiates opening the sash. Thereafter, the sash opens further in response to winding in of the opening pull cable.

Abstract: A mount for one or more constant force curl springs uses a mounting block secured within a sash shoe channel to support the underside of a lowermost curl spring with a superposed curl spring mounted to counterrotate against an outer convolution of the lowermost spring. Uncoiled free ends of the curl springs pass downward on opposite sides of the mounting block and connect to opposite sides of a sash shoe arranged below the mounting block. This connection is made by laterally sliding the spring ends into slots molded in the sash shoe so that barbs struck and bent from the planes of the free ends of the springs are lodged in widened recesses of the slots to retain the spring ends against upward withdrawal from the spring slots.

Abstract: An adjustment assembly enables lateral adjustment of the position of a pivot connection of a first member relative to a second member in a window assembly having a first member, a second member, and a rotatable pivot-mounting element. The pivot-mounting element includes a first pivot-mounting section with a first pivot axis operatively connected to the first member and a second pivot-mounting section operatively connected to the second member. The second pivot-mounting section has a second pivot axis that is generally parallel to and offset from the first pivot axis. An engager section is located intermediate the pivot-mounting sections. Finally, a locking member is provided to cooperate with the engager section and is movable relative to the engager section between a retention position and a release position.