The Doorknob Signal
We’ve seen it before, the universal sign of “I have company, go away” signal. Often taking form as a tie around a doorknob or the potted plant flipped over. There’s got to be a more high-tech way. The Doorknob Condition uses an innovated pulley system that makes the knob on the exterior recess inwards when pulled from the inside. Without a knob to use, there’s no way to get it. Sure it could be great for security but who are we kidding? We know exactly how a doorknob like this would be used. Too bad it doesn’t have a little timer to indicate when to come back.
真正請勿打擾!
Nice idea!
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on January 26th, 2010 at 2:39 pm
I love, love, love the idea and want to purchase some of these doorknobs! Where can I find them and how soon?
on March 1st, 2010 at 4:37 pm
What if someone accidently pushes in the doorknob from the
wrong side then you will never be able to open the door again!