Duplicating machine, particularly for punched and laser keys

A duplicating machine comprising,

• a base having two clamps for duplicating an original key or cutting a blank key;
• a carriage vertically moveable relative to said clamps,
• a feeler located above the original key and a cutter located above the blank key,
• self-centering chucks supporting said feeler and cutter on said carriage, the height of said feeler above the clamps being adjustable independently of said cutter,
• the self centering chucks being electrically insulated from the machine,
• a first indicator member having two terminals, one terminal connected to a self centering chuck, the other terminal connected to an electrical power source,
• a logic coincidence circuit having two inputs and an output, the two inputs connected to said self centering chucks,
• a second indicator member having two terminals, one terminal connected to the output of the logic coincidence circuit, the other terminal connected to an electrical power source,
• the self centering chuck for the cutter having a rigid threaded shaft having an operating knob and housed within a tubular support,
• the tubular support having at least one radial cavity,
• a radial pin engagable with the radial cavity and axially movable relative to said carriage, the radial pin operable from the outside.