29 results found displaying 13-15
    
mtd28student
 New Zealand
Motorised Skateboard Printer Friendly Version
Motorised skate boards have been around for a while. Basically they are snowboard sized skateboards with 40ish cc engines on the back of them, usually chain or belt driven the back wheels. This is fine, but these monsters can't really be used on or at a skate park. Because of the size and the weight of them, it is impossible to do tricks with them.
What i am thinking about is a motor that is attached to the back of an ordinary skateboard, but it is detachable. So once you get to the pack, you simply undo the fasteners and pull it off.
You want to be able to attach the device to any skateboard, so a means of propulsion needs to be thought of that doesn't include the skateboards wheels (jet propulsion isn't really an option either).
A swing arm out the back of the skateboard would probably do the trick. The swing arm would have a single rubber wheel on it and be spring loaded so that it is always in contact with the ground. The wheel could be belt, chain or shaft driven.
And the engine could be either electic or petrol (chainsaw for prototype). Electric posses the problem of batteries and petrol posses the problem of weight.
I started to make a prototpe of this (many moons ago, when i was about 14) but the centrivical clutch broke on the engine and i never got round to finishing the project.
any improvements anyone?
Reward: once in production..... a discount 

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44°

    
oldasdirt1k
 USA
Alerting Pickpocket Device Printer Friendly Version
Sew a strip of 'Velcro' or 'Hooks and Loops' to the inside portion of a purse, or jacket or coat lining, while doing this insert the string and ring end of a ALARMING device that is accuated with the 'pull string'. Then glue the 'Opposing strip' to your 'money holding' device and secure the 'alarm string' underneath the strip and attach the alarm to the string. When the string is pulled out, the ALARM sounds and the THIEF is discovered and the alarm is still sounding and goes with him. Or he realizes that he is 'discovered' and tosses the wallet or purse away! and it's recovered!
Reward: To be made apart of the developing project and be named as the devices creator. 

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43°

    
 USA
Cellphone Projector Printer Friendly Version
Cellphones are equipped with televison services these days. If a cellphone had an internal projector, that can project this pictures onto a surface, the viewing experience will be highly enhanced and we will really have a tv on the go.

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