Methods for controlling operation of movable barrier
An obstacle and operating device technology, applied in the direction of power control mechanism, building structure, wing fan control mechanism, etc., can solve the problem of not providing audio or video instructions at the door position.
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[0023] A system and related method for signaling the position of a movable obstacle and fixing its position is described in the accompanying drawings figure 1 Indicated generally with reference numeral 10 . The system 10 is used in conjunction with a movable barrier, such as a conventional sectional garage door generally indicated at 12 . However, the movable barrier may also be in the form of a door, curtain, awning, rollable shutter or the like. The open portion is framed by a frame relative to which the door moves to open and close in the open portion, generally indicated at 14 and consisting of a pair of jamb members 16 spaced vertically from each other, as shown in figure 1 As shown, the jambs extend parallel and vertically upward from the ground (not shown). The side posts 16 are spaced from each other and connected at their vertical upper ends by headers 18 , thereby forming a generally U-shaped frame 14 around the open portion of the door 12 . The frame 14 is typica...
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