Show GARAGE DOOR CLOSED BY PASSAGE OF AUTO wheels of vehicle pass over tripping device door la Is counterweighted so that when trip Is B released weight pulls door shut or open as ai my may be desired by driver AU all easy running garage or barn door may be arranged anan ged ns as shown in the drawing to close itself as soon boon na as tile the roar rear wheels of 0 a vehicle puss pass ov the tripping device the door Is counter weighted so that when the trip Is released the weight pulls the door shut tile trip or release consists of a hinged plank arranged na its indicated to engage with the not notched elied plate on tile the door tills this plate line liaa two notches one of which engages with the plank ti MAIL A simple device that automatically closes sliding garage doors after the passage of a vehicle in ili the extreme open posit position lon A spring on oil the lie underside or of the lie plank holds it in engagement with alth the notches in iii operation the front wheel of the vehicle pushes the trip trill down and alid the he doot door Is released until the catch engages lit in the second notch which la Is about 2 inches hack back of the first the rear wheel disengages the catch from the he second notch and the door rolls shut the door travel should be adjusted so that it will clear the car RR as it shuts POP popular ular mechanics Mech atiles AIng magazine azine |