| 摘要 |
A skylight or roof hatch that is manually opened and closed. The skylight has one or more hinges allowing it to open and close and it also has one more gas springs that exerts constant force against the window urging the window into an open position. The window is closed to overcome the biasing force exerted by gas springs by winding in a cable that is connected to the window. A single pulley wheel that is mechanically linked to other mechanical elements is utilized to spool in cable in order to close the window and to unlock a reel lock to allow for automatic opening of the window. |
