(without using any connection wires)? I frequently need to plug existing electrical equipment in places where there is no power outlet I have to use clumsy long tailed electrical extension plug that hinders free movement ? Short of using a battery in the equipment how to connect the power junction points (earth live neutral to an existing electrical power outlet using nothing but air in between)?
Research is going on Wireless transmission of electricity in IIT, Madras, India. This will make considerable changes in how the electricity is transmitted in future certainly now, there is no way to transmit electricity wirelessly, you need to wait for some more years.
Resurrect Nicola Tesla, he could do it for you. Anything short of that, will necessitate your going over his patents for wireless transmission of electrical energy, and do it yourself. It can be done, but no one will admit it, nor tell you how. I doubt your utility company will like the idea either, as direct application of his design my end up spinning their meters backward and they'll end up owing you money.
Air is not a very good conductor. When you generate a spark, you are finally overcoming the insulative value of air and establishing an electrical connection through ionization. Anyone who has seen lightning can appreciate the randomness of the path of this connection. If there are any nearby conductors, the electricity will jump to them. An option for you would be to convert your power into some sort of form that you could beam towards a receiver (laser or microwave comes to mind). A receiver would then take the energy from the signal and convert it back to usable power for your device. A lot of energy will be lost in this process.
Hmmm, for modest loads, you can use induction but that needs modifications to the equipment you are using AND needs the drive coils embedded in the walls of the building you are in. It does work quite well though :) Tesla had some quite good ideas about tranmistting power but again, the method is not something too practical to use in your everday building. Sorry :(
