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Multiple Padlock Farm Gate Mechanism - multi-lock-gate-at-islay-creek-road-montana-de-oro

Multiple Padlock Farm Gate Mechanism -

Multi-lock gate as seen on Islay Creek Road at Montaña de Oro, Los Osos, CA, on 22 March 2008 during Barbara Renshaw and Jerry Kirkhart's Spring Flower Photo Walk. Photo by Michael "Mike" L. Baird, Canon 5D w/ Canon EF 180mm f3.5L Macro USM AutoFocus Telephoto Lens for Canon SLR Cameras on Gitzo GT1540 6X Carbon Fiber Series 1 G-Lock Mountaineer Tripod.


If you know how this mechanism works please explain in a comment below!


On Jan 17, 2010, at 8:26 PM, "yawpawranger {at} aol. d o t com" wrote: "Hi Mike, I am a Ranger at a Boy Scout Camp in New Jersey, I saw your pic of the multi-lock-gate-at-islay-creek-road-montan a-de-oro. I was wondering if you had any other pics of this lock or if you knew how it worked. I have a gate with 5 locks on it and I am looking for a better way to set it up as of now the locks are daisy chained. Thanks, Chris Murphy, Ranger Camp Yaw Paw, 201-327-5250"

A: That is a mystery to me still. I once thought I figured it out, but then I could not reproduce the theory. I did patent research and those systems are not the same. I have gone back and looked at these gates and it is not obvious how it works w/o operating the mechanism and I did not have a key. Please let me know if you figure it out w a comment on the lock pic page!


1/17/2010 I did another search: (watch both videos)


The lock I photographed does not seem that precise or complicated, but????


See US Patent 6857299 - Multiple padlock latch


15 Oct. 2010, Joe gets it: "looking at your picture, and that alone, I'll try and describe what I think they have going on..... Inside the tube on the bottom is a round rod. When the rod slides to the left, the gate opens. Slide the rod back to the right, and it's locked(closed). Simple right?? OK, now the tricky part.... The locks are all connected by flat tabs.... but all the tabs are not connected to the rod! Only the tab on the far left is welded to the rod. On the oposite end, the right most tab(hard to see) is welded to the gate. All the other tabs (5 of them) are floating on eyelets around rod (you can't see them). When any of the locks is removed, the "Chain" is broken and the rod can move to the left. Hope this helps -joe"


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Taken on March 22, 2008