Padlock puzzle.
https://diqn32j8nouaz.cloudfront.net...e_fullsize.jpg
Previously:
https://www.homemadetools.net/forum/...955#post175777
https://www.homemadetools.net/forum/...927#post156677
https://www.homemadetools.net/forum/...1659#post74870
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The gate at our shooting range has at least 25 locks on it...
That is a good way to give many access without providing a master key. If someone violates rules or is delinquent with dues, etc. you can just take their lock out of the string. Everyone else can still get in, no need to rekey then get everyone new keys
That is a six input OR gate
- much nicer than the simple on I made where we took a length of chain and the padlocks each linked into each other, one end on the chain and the other end on the other end of the chain.
Problem is, it's only as strong as the poorest quality lock in the system.
Locks only keep honest people out...
I've seen this on gates leading to cellular tower sites. Other corpotatiions. government agencies rent space on the towers and each has their own lock.
There is a commercial product called "Stymie Lock" (https://www.stymielock.com/) which alllows many locks to a gate and prevents the issue of 'a cheap chain stretched across, and stupid users sometimes lock out other users by not putting their locks in proper series configuration'
Very well, built, I find it intuitive to use, and I've seen it on lots of shared sites, such as communications tower sites, water tower & tank sites (which often have radio communications equipment co-located) and such. FWIW, City of Raleigh, NC, has them on a lot of their sites.
Ha, that reminds me of Stymie from The Little Rascals!!!!
https://www.youtube.com/watch?v=gIySr48KzWk&t=13s
The guy who invented it is in NC...Quote:
Originally Posted by kb4mdz
It's a pretty good invention, though the patent has expired. I would just copy the idea for my use, because at $350 for the base unit and $50 for additionals, I could build it from stuff in the inventory pile.
Attachment 45410
What is most surprising is that there are no useful images on the company site, had to go to the patent to get the above...
Here is one more expired patent that has an insteresting OR gate solution:
Attachment 45412
Attachment 45413
And then there is a circular solution:
Attachment 45414
Honest people don't need locks to stay outQuote:
Originally Posted by IntheGroove
