公开(公告)号：US3685567A

公开(公告)日：1972-08-22

申请号：US3685567D

申请日：1969-09-18

Applicant: PEMBERTON PAUL E ,  JOHN J LUBY

Inventor： PEMBERTON PAUL E ,  LUBY JOHN J

IPC: A62C2/16 ,  E05F1/00 ,  E05F1/02 ,  E05F15/20

CPC classification number: E05F1/006 ,  A62C2/16 ,  E05D13/1261 ,  E05F1/02 ,  E05Y2201/41 ,  E05Y2201/492 ,  E05Y2201/50 ,  E05Y2800/254 ,  E05Y2800/342 ,  E05Y2900/106 ,  E05Y2900/134

Abstract: A door having horizontally hinged sections is supported upon reinforced track means for movement between an upright closed position and an open position. A counterbalance mechanism, which is mounted upon the wall above the opening, is connected to the door to counteract gravity. The counterbalance springs are connected to fusible link means which melts at a predetermined temperature and thereby reduces the tension on the springs so that the door will close under the force of gravity. Governor means is rendered operative when the fusible link is ruptured to control the closing movement of the door.

Abstract translation: 具有水平铰接部分的门被支撑在加强轨道装置上，用于在竖直关闭位置和打开位置之间移动。 安装在开口上方的壁上的平衡机构连接到门以抵抗重力。 平衡弹簧连接到易熔连接装置，其在预定温度下熔化，从而减小弹簧上的张力，使得门在重力作用下闭合。 当熔丝断裂以控制门的关闭运动时，调速器装置可以工作。