Abstract: A locking system for a window sash comprises a lock handle assembly, reciprocating rod members connected to the lock handle assembly, and rotatable cam assemblies connected to the rod members. Each cam assembly has a cam element which upon reciprocation of its respective rod element moves into and out of a cam keeper which is mounted on an adjacent window sash. Each rod member has a rod tip which moves into and out of a channel provided in the window frame. In a first operation of the lock handle assembly, the rod members are reciprocated inwardly to rotate the cam elements out of their respective cam keeper and to move the rod tips partially out of the frame channels which allows the window sash to be moved vertically within the channels. A further operation of the lock handle assembly moves the rod tips entirely out of the channels to allow the window sash to be tilted.

Abstract: A sturdy, low profile window having a window frame and at least one sash. The window frame includes a welded master frame and window frame inserts. The window frame inserts in cooperation with the master frame form the window frame. The sash of the low profile window includes a glazing, master sash, and sash inserts. The sash inserts in cooperation with the master sash form the sash and retain the glazing within the sash. The sash of the present invention is confined within the window frame to produce the low profile window.

Abstract: A window sash member includes first and second generally parallel sidewalls. First and second spaced, generally parallel transverse walls, extending between and oriented generally perpendicular to the first and second sidewalls, connect the first and second sidewalls to define a first hollow chamber. A third transverse wall, located without the first hollow chamber adjacent to and generally parallel to the first transverse wall, extends from the first transverse wall and terminates short of the second sidewall. A first interior wall, oriented generally parallel to the first sidewall, extends from the third transverse wall to the first transverse wall to define a second hollow chamber. A fourth transverse wall, located without the first hollow chamber adjacent to and generally parallel to the second transverse wall, extends from the first sidewall and terminates short of the second sidewall.

Abstract: A window sash member is composed of a pair of rail members and a pair of vertical sash members or stiles which may each include a framing element having a unique cross-sectional configuration. The sash member is so constructed as to permit replacement of glass panes without destroying the integrity of the frame. This is accomplished by removing a series of glazing strips. A hollow defined within the framing element provides the rails with a reinforcing member which has fins to minimize undesired thermal conduction across the frame. A downwardly open recess is defined within the framing element so as to permit it to be employed with a wide variety of window frame elements and adapting it for use in a wide variety of types of windows. The rails are preferably joined to the stiles by welding. The sash framing element is particularly adapted to be used with insulated windows having two or three panes of glass which define a thermally insulating dead air space therebetween.

Abstract: A thermal break in a metal (e.g. aluminum) frame window or door is characterized by two spaced metal sections joined together by an insulative block of poured and hardened thermal fill material which projects inward toward the sash at least to the same extent as the inward-most-projection of the metal sections in the break region. One or more surfaces of the block may serve as a guide for a sliding sash. This construction eliminates the metal conductive path, from outside to inside, which extends along inward-most portions of the jamb in prior art windows. Preferably, the thermal breaks in the jamb and sill are co-planar to provide a continuous thermal break around the entire frame. The method of forming the block of thermal fill utilizes at least one mold surface to which the fill material does not adhere during hardening so that the block can be easily removed from the mold.