Bike lock developed that makes thieves immediately vomit Crowdfunded creator of SkunkLock says device emits special smelly formula when it is being cut
With the right tools, Idzkowski said, a thief could cut through most locks in less than a minute. Thieves, he said, “talk in seconds: a 15-second bike, a 20-second bike, and it goes up to 30-60-second bikes, with Kryptonite locks that require two cuts, each about 25 seconds”.
With his co-inventor, Yves Perrenoud, Idzkowski created a U-shaped lock of carbon and steel with a hollow chamber to hold one of three pressurized gases of their own concoction, including one called “formula D_1”. When someone cuts about 30% of the way into the lock, Idzkowski said, the gas erupts in the direction of the gash.
“It’s pretty much immediately vomit inducing, causes difficulty breathing,” Idzkowski said. “A lot of similar symptoms to pepper spray.”
The inventors have not yet tested the device on an actual would-be thief, but have tested it on themselves and volunteers at distances of two feet (60cm), five feet, 10ft and 20ft. “At two feet it was pretty bad. It was absolutely vomit inducing in 99% of people. At five feet it’s very noticeable and the initial reaction is to move away from it. At 10ft it’s definitely detectable and very unpleasant.”
Source and more: https://www.theguardian.com/lifeandstyle/2016/oct/21/bike-lock-developed-that-makes-thieves-immediately-vomit