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Locking up a scooter/cycle

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  • BigBoy1
    replied
    I like the idea posted in #80. Why not hold the two sections of block together with recessed bolts. However, make sure the bolts are special such as ones with 3 or 5 sides on their heads which require a special wrench/socket to remove them? Maybe a 6 sided bolt with no sides parallel?

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  • Black_Moons
    replied
    Originally posted by boaterri View Post
    Going back to the theme of a tube filled with another material....How about a tube filled with Kevlar strands, when the cutter breaks thru the tube the wheel grabs the Kevlar and turns into a twisted ball of snot. The tube can be bent into a horse shoe shape and then locked by the method of your choice.

    Think loggers chaps for chainsaw protection. Here is a link showing the principal: https://www.youtube.com/watch?v=IWIwyfkmlNs

    Non lethal, non explosive, non trouble making for you, and you might get a battery powered grinder in the process.


    Rick
    I don't think a round grinding wheel would grab fibers so easily. Maybe fibers in some kind of 'goop' or glue (With the added bonus of the grinding wheel flinging sticky goop everywhere and could be enough to overload the motor trying to turn through a goo filled gap, Wouldn't take long at substainally reduced RPM to overheat the motor)

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  • RichardG
    replied
    Just a though, a piece of heater hose large enough to be hard to use cutters on and fill the hose with tiger tar should stop a grinder cold and a good lock that is hard to get to.
    Richard

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  • boaterri
    replied
    Going back to the theme of a tube filled with another material....How about a tube filled with Kevlar strands, when the cutter breaks thru the tube the wheel grabs the Kevlar and turns into a twisted ball of snot. The tube can be bent into a horse shoe shape and then locked by the method of your choice.

    Think loggers chaps for chainsaw protection. Here is a link showing the principal: https://www.youtube.com/watch?v=IWIwyfkmlNs

    Non lethal, non explosive, non trouble making for you, and you might get a battery powered grinder in the process.


    Rick

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  • Michael Edwards
    replied
    That is hilarious!

    ME

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  • PStechPaul
    replied
    Just found this interesting device:

    http://www.gizmag.com/bike-mine-expl...default-widget

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  • Evan
    replied
    Nine volt battery and 130 dB? Not in the real world it isn't. Those numbers are meaningless without a distance value as well as a frequency. The siren I have is rated at 115 dB at 1 metre. That means something, in particular that it is on the less than 1 minute for permanent ear damage level at that distance. The 9 volt battery unit may well be 130dB at 1 centimetre, which at 100 times further is going to be much less. It can't be calculated at distance using power factors since the way sound travels will be very dependent on things like the shape of the actual emitter, frequency, container material, size and shape, surface texture and so on.

    Still, it seems like a worthwhile idea. Very loud sounds make it hard to think, very literally. Bright flashing lights are also interesting, especially when they induce epilepsy. With the LEDs now available all sorts of lighting effects are easy and cheap to produce. That is very worth considering just as a fun project.

    The more I think about this it would be cool to add a string of super bright LEDs along the sides of the scooter. Add a controller that could make them flash in interesting ways and maybe play some loud industrial rock music like Rammstein and that would definitely attract attention when the machine was touched when it shouldn't be. ( I happen to like Rammstein a lot, especially since I speak German). Or, maybe use some sound recordings of people being tortured in creative ways. Maybe animals screeching, an eagle perhaps. I think I should get some sleep...
    Last edited by Evan; 03-28-2016, 06:45 AM.

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  • Smokedaddy
    replied
    I have something like these on all my car/truck covers and motorcycles. You could make one very easy and even boost the noise level as needed. It would run until that battery died. If you concealed it well they would have a hard time finding it to disable it. Pulling the pin activates it.

    http://www.amazon.com/Dowco-26038-00.../dp/B000GU7DGS

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  • Mcostello
    replied
    A double strobe LED might make the thief think He cannot find them all. If it could be rigged up to flash in the perps eyes then call home You might get a picture or time for a swing in as they stagger around.

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  • Evan
    replied
    Fine by me. It will make for a nice teaching class for the Makers Group. I plan on doing teaching there for the young guys. I have already been in contact with them. I am sure that something like this will attract a lot of interest. The Makers just had a welder stolen and I did some very careful enhancement of a long shot security camera. I was able to determine that the thief was wearing a cloth over his lower face and very large sun glasses. Unfortunately it meant no ID was possible. The truck he was driving was recovered. It was stolen. It isn't going to be easy to keep that welder in use anywhere except in an always closed private shop. It will be far too easy to spot if it is in any public area. It is not a large city and there aren't a lot of shops excepting the military. At least I was able to determine some things about the clothing he was wearing. If he ever wears it in public again he will most likely be caught. There are some very clear stain patterns on his sweat shirt. It is the kind of thing that he very likely will not think of. I also have a good estimate of his height and weight.

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  • Paul Alciatore
    replied
    You do realize that after all this thinking and after all the effort you put into whatever lock you decide on, this is the one bike in all of Canada that no one will ever try to steal. Things just work that way.

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  • Evan
    replied
    Heh. If the jamming rod was in a wide portion of the slot to one side of the most likely cutting location the spinning disk would try to bend the jamming rod and most likely end up breaking the zip disc. For some reason that feels satisfying. I wonder how I could encourage somebody to try and steal the scooter? That would make a nice U-Tube video. I would NOT show how it worked though.

    It is something to play with when I get involved with the local Makers Group. That will be a fun project. I'll make at least several locking shafts and we can test it. If/when I end up doing that I will post it here. That won't be for at least a few months though.

    Gee, it has occurred to me for the best result I should mark the lock shaft with a line and writing that says "CUT HERE". I am guessing that would make a thief rather suspicious that he was being played with and he would be right. The other thing that will work and I have played with before is to have a sensor set off a basic camera flash several times. They won't know exactly where it came from but they will know something not good for them is up. A tiny very bright white LED will do that trick nicely and they won't be able to spot it easily at all.
    Last edited by Evan; 03-26-2016, 03:01 AM.

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  • Paul Alciatore
    replied
    Run with it!

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  • Evan
    replied
    Been thinking on this some more. A shaft from one block (or plate) to the other side block and locked in place at one end by a protected padlock could contain a much smaller shaft in a lengthwise hole. If that shaft were simply highly spring loaded at both ends the moment it was cut it would put heavy pressure on the sides of the zip disk and stall it totally. I might even end up winning a battery powered angle grinder. :-) The shaft would be easy to make. No reason it needs to be round. It could be rectangular parts all screwed together with numerous screws and a slot inside for the jamming rod. Strong springs at each end with set screws to load the springs. Type of metal would be immaterial, so to speak.

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  • Black_Moons
    replied
    Originally posted by ulav8r View Post
    If the blocks were a little thicker, a spring loaded plunger in each block, retracted by a small air cylinder. Have the air hose on a quick disconnects, remove air hose when locked.
    Might work rather well, especially if there is 'extra' length to the plunger.

    When cut though, the plunger would extend further and grab the cutting tool.

    Leave a comment:

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