Will your invention work?
The only way to find out whether your invention works is to make and test a "prototype". A prototype is a working example of your invention though it will probably differ from the product that you eventually manufacture in materials, cost and reliability. For further information on prototypes see the article in Wikipedia.
If you have the skills and facilities to make a prototype by yourself, then all is well and good. If you need help, you may wish to consult a product design consultant. There are different types of consultants for different industries. Jonathan Butters of Butters Innovation of Liverpool and Richard Hall of Pd-m International of Harrogate help design and develop electronic and mechanical products. Ron Jones of Horizon Composites helps develop glass and ceramics products.
A number of universities also help with product design and development. For example, Lancaster University's Product Development Unit ("LPDU) offers concept design, prototyping, testing and ad hoc consultancy.
Prototyping can be expensive and if you cannot pay for it out of your own pocket you should consult the "Where are you going to find funding?" page.
Also, before talking to anybody about your invention you should make sure that everybody concerned receives what you have to say in confidence. The best way to do that is to ask them to sign confidentiality agreements of the kind prepared by Jane Lambert which you can view or download here.