| 摘要 |
1,002,338. Balancing sashes. GENERAL BRONZE CORPORATION. Dec. 15, 1961 [Feb. 8, 1961], No. 44985/61. Heading E1J. A sliding sash S is balanced on each side by an upwardly-biased housing 11 sliding in a channel-sectioned frame member. A tension spring 26 in each housing 11 acts on a slide 29 having a pulley 30 pivoted to it, round which is wound one end of a cable 33, thereby causing pulleys 31, 32 and the housing, to which they are attached, to move upwards. In the top of the housing is fixed a slide member 16 supporting the pivot pins 20 of a latch 15 in slots, which latch has pivoted to it an arm 24 which is pivoted in turn to a rod 22 with a circumferential spring for holding the latch in a vertical position when the toe 37 of the latch is engaged under a shoulder 40 on the frame member. Attached to the bottom of the housing is a slide member 12 with an inclined surface 16<SP>1</SP> The sash S carries hooked projections 36 which bear on the housing 11, and spring clips 17, and the vertical sash members carry weather seals 8 and seals 7 of plastics material. To disengage the sash S from the frame, both latches 15 must be engaged with shoulders 40 in the side frame members, the sash lifted and then moved into either of the side frame members until the opposite edge can be freed. |
