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Show GARAGE DOOR CLOSED BY PASSAGE OF AUTO Wheels of Vehicle Pass Over Tripping Device. Door Is Counter-weighted So That When Trip is Released, Weight Pulls Door Shut or Open as May Be Desired by Driver. An easy-running garage or barn door may be arranged, as shown in the drawing, to close Itself as soon as the rear wheels of a vehicle pass ovet the tripping device. The door is counter-weighted counter-weighted so that, when the trip is released, re-leased, the weight pulls the door shut. The trip, or release, consists of a hinged plank arranged, as Indicated, to engage with the notched plate on the door; this plate has two notches, one of which engages with the plank A Simple Device That Automatically Closes Sliding Garage Doors After the Passage of a Vehicle. in the extreme open position. A spring on the underside of the plank holds it in engagement with the notches. In operation, the front wheel of the vehicle pushes the trip down and the door is released until the catch engages In the second notch, which Is about 2 Inches back of the first. The rear wheel disengages the catch from the second notch and'tha door rolls shut. The door travel should be adjusted so that it will clear the car as it shuts. Popular Mechanics Magazine. |