公开(公告)号：US3600857A

公开(公告)日：1971-08-24

申请号：US3600857D

申请日：1969-06-11

Applicant: ALUMINUM CO OF AMERICA

Inventor： BARGE ROBERT LEWIS LA ,  VOSBURGH PAUL NOBLE

IPC: E06B3/263 ,  E06B3/30 ,  E06B3/42 ,  E06B1/32

CPC classification number: E06B3/42 ,  E06B3/26341 ,  E06B3/26347 ,  E06B3/305

Abstract: In a window assembly having an outer frame within which inboard and outboard lapping sashes are mounted for horizontal or vertical relative movement, the outer frame includes interior and exterior metal frame members and a rigid plastic or other nonmetallic thermal barrier member therebetween connecting the metal frame members in thermally insulated relation to each other, each sash includes an inner frame embracing the periphery of a glass or other panel and constituted by a metal frame member and a rigid plastic or other nonmetallic thermal insulating frame member respectively defining the entire opposite lateral surfaces of the frame, and the inboard and outboard sashes have their insulating frame members at their exterior and interior sides, respectively, so as to be adjacent to the thermal barrier member of the outer frame. The insulating frame member of each sash desirably includes a web or webs defining the respective lateral surface of the sash frame and flanges extending therefrom and having free marginal portions interlocking with the metal sash frame member to substantially space the latter from the web and to cooperate with the web and the metal frame member in defining cavities therebetween.