Posted by john in la on April 22, 2008 at 19:50:16 from (68.222.28.37):
Good friend called me today and ask if I will help him build a self closing farm gate that is opened by a push from a tractor or pickup and then closes by itself after you pass.
I have seen only one design in my days.
It consist off a tall metal pole. The gate is welded to a pipe sleeve that will slide up and down on the metal pole. It also has 2 cables that are mounted to the top of the pole; wrapped around the pole; and then hook to the top of the gate. When you open the gate 1 of the cables is shortened because of it wrapping around the pole in the correct direction. The other cable works in a swing to the opposite direction. This shorting or wrapping of the cable on the pole makes the gate ride up the pole. With gravity allowed to work the gate closes releasing the tension or wrapping of the cable.
Does this description make any sense?????????
So I have only seen a few of these and never really used one myself.
Please give me some pointers of things to look out for; different designs that work better; ect. Or should I just tell him to get off his fat duff and close the gate himself.
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