Combination pivot corner and slide guide for sash window

DETAILED DESCRIPTION I claim: 1.
A combination corner pivot and slide guide member adapted to be installed inside the bottom corner of a window sash frame of a double-hung window assembly which provides a vertical jamb having a channel-shaped guide rail opening toward the vertical stile of the window sash frame, the channel-shaped guide rail having opposed inwardly directed flanges defining the opening therebetween, and a sash balance assembly within said guide rail, the vertical stile including a passage at the bottom corner aligned with the guide rail opening, said combination member comprising: A.
a unitary molded body having a bottom wall and a passageway through the wall opening toward the upper end of said body, and ledge formations spaced above said bottom wall; B.
said body having a lateral opening communicating with the ledge formations and located to receive a pin therethrough to be supported on said ledge formations with an extremity of the pin protruding from the body for extension through the stile passage, said pin being adapted for operative engagement with the sash balance assembly; C.
said body having an integrally molded slide guide formation protruding laterally outwardly substantially parallel with said bottom wall to underlie and generally parallel the protruding extremity of the pin for extension through said stile passage, said slide guide formation having an enlarged head on the outer end thereof adapted for engagement behind the guide rail flanges for engagement of said body with a guide rail when said combination member is installed for retaining the window sash and jamb in substantially parallel relationship during assembly and sliding movment of the window sash relative to the jamb, said slide guide formation, immediately inward of said enlarged head, comprising a pivot segment area adapted for reception and pivotal rotation between the guide rail flange when the enlarged head is engaged behind the guide rail flanges.
2.
The combination member of claim 1 in which the enlarged head of said slide guide formation is substantially T-shaped