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    Exit device vertical rod upper latching and holddown mechanism
    27.
    发明授权
    Exit device vertical rod upper latching and holddown mechanism 失效
    退出设备垂直上锁和锁定机构

    公开(公告)号：US3600022A

    公开(公告)日：1971-08-17

    申请号：US3600022D

    申请日：1968-08-22

    Applicant: NORRIS INDUSTRIES

    Inventor： ARMSTRONG RICHARD L

    IPC: E05B63/20 ,  E05B65/10 ,  E05C9/18

    CPC classification number: E05B65/1013 ,  E05B63/20 ,  E05B65/1066 ,  Y10T292/1071

    Abstract: An exit device consisting of a crossbar adapted to be pushed to raise upper and lower vertical actuating rods which in turn release respective upper and lower latchbolts so that the door can be opened. The upper latchbolt is pivoted near its outside end so that when released, it will fall into a withdrawn position by gravity, assisted by a wiping of a front face of the latchbolt by a retaining plate on the doorframe. A blocker, pivoted on the inner side of the housing, holds the latchbolt in extended locked position by engagement with a downwardly facing shoulder on the inner side of the latchbolt. The upper actuating rod is linked to the blocker in such fashion that the blocker is swung out of blocking position when the actuating rod is lifted. When the actuating rod is released, the weight of the rod serves to urge the blocker toward blocking position. The upper latchbolt is returned from retracted position to extended position by a slide which is shifted transversely toward the latchbolt when the slide strikes a strike face, the slide then serving to push upon a projection on the upper latchbolt which tilts the latchbolt into the extended position, where it is blocked by the blocker until released. A lower latchbolt is also pulled to released position by upward movement of the lower actuating rod and held in released position as long as the upper latchbolt is held in released position. Also, the lower latchbolt is held in latched position as long as the upper latchbolt is held in latched position by the blocker.

    Exit device vertical rod collapsible latch bolt
    28.
    发明授权
    Exit device vertical rod collapsible latch bolt 失效
    退出设备垂直拉杆可拉锁栓

    公开(公告)号：US3583740A

    公开(公告)日：1971-06-08

    申请号：US3583740D

    申请日：1968-08-22

    Applicant: NORRIS INDUSTRIES

    Inventor： ARMSTRONG RICHARD L

    IPC: E05B63/20 ,  E05B65/10 ,  E05C3/02

    CPC classification number: E05B63/20 ,  E05B65/1013 ,  Y10T292/0822 ,  Y10T292/1078 ,  Y10T292/1092

    Abstract: An exit device consisting of a crossbar adapted to be pushed to raise upper and lower vertical actuating rods which in turn release respective upper and lower latch bolts so that the door can be opened. The upper latch bolt is pivoted near its outside end so that, when released, it will fall into a withdrawn position by gravity, assisted by a wiping of a front face of the latch bolt by a retaining plate on the door frame. A blocker, pivoted on the inner side of the housing, holds the latch bolt in extended locked position by engagement with a downwardly facing shoulder on the inner side of the latch bolt. The upper actuating rod is linked to the blocker in such fashion that the blocker is swung out of blocking position when the actuating rod is lifted. When the actuating rod is released, the weight of the rod serves to urge the blocker toward blocking position. The upper latch bolts is returned from retracted position to extended position by a slide which is shifted transversely toward the latch bolt when the slide strikes a strike face, the slide then serving to push upon a projection on the upper latch bolt which tilts the latch bolt into the extended position, where it is blocked by the blocker until released. A lower latch bolt is also pulled to released position by upward movement of the lower actuating rod and held in released position as long as the upper latch bolt is held in released position. Also, the lower latch bolt is held in latched position as long as the upper latch bolt is held in latched position by the blocker.

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