How can I fix the problem of worneout Overload safety/Reset Button ?

I am using Kenwood A901 Chef since1983. It developed mechanical problems from time to time which I some how managed to solve. This time the Overload Protection Reset Button (Green Button) has broken. I have removed the button and have taped the two electrical wires of the said wsitch togather. The machine is working normally. What I wanted to ask is that weather my action is correct pending the replacement of the Overload Safety Device. I also wish to know the Technical Specifications of the Overlod Protection Reset Button to enable me to procure the same.