Necessity - The Mother of All Inventions -
The last straw was when he one day went to collect his completed job only to discover that two of the thirty parts he handed in to the servicing company , had been lost. The components , being from an antique motor car , were not easily or economically replaced.
He decided to buy his own cabinet
The ensuing problem was that the only cabinets which were available to do the job necessitated large , high capacity 415 volt air compressors.
Having access to only domestic 240volt power , our man was stumped. As an engineer , he studied the design of the units on offer and immediately saw areas of potential improvement.