| 摘要 |
The invention concerns a device for turnable windows comprising a frame (2) and a casement (1). The frame (2) is formed on each one of two facing side faces with a longitudinal groove (9). The casement (1) is pivotally mounted on a link-arm mechanism (3, 7) and on two oppositely directed edge side faces said casement (1) is formed with a guide bushing (8a, 8b), said bushings travelling in their associated one of said longitudinal grooves (9). By means of a rotatable lever (12) said bushings are arranged to be extended or retracted simultaneously in pairs out of respectively into said grooves (9). When two of said guide bushings (8a and 8b, respectively) engage in one longitudinal groove (9) each, said casement (1) may be pivoted in the reverse direction over half a turn and be closed in said reversed position by retraction of the two non-engaged guide bushings (8a and 8b, respectively) and renewed extension thereof into renewed engagement in one groove (9) each. From this closed position said casement (1) may be pivoted in the reverse direction by renewed retraction of the last-mentioned two guide bushings (8a and 8b, respectively) out of engagement with said grooves (9) or, alternatively, may continue to be pivoted in the same direction by retraction of the two remaining guide bushings (8a and 8b, respectively) out of engagement with the grooves (9).
|
