Floppy disk auxiliary memory device

Claim 1

A portable floppy disk auxiliary memory device for a machine control unit of a numeric control apparatus having a main memory for storing numeric control machining information, comprising: a body disposed outside the machine control unit and having an interior formed by sidewalls and containing a floppy disk drive device in the interior and having a floppy disk insertion slot defined in one of the sidewalls to receive a floppy disk having auxiliary numeric control machining information stored therein as a auxiliary memory; an input/output interface disposed in the body for data transfer from the auxiliary memory to the machine control unit; a door pivotally connected to a front portion of said body and being movable between open and closed positions over the sidewall of said body having the insertion slot; detecting means disposed in the vicinity of said door for detecting open and closed positions of said door, a control unit disposed is said body and coupled to the floppy disk drive and the detecting means for permitting access to the floppy disk when the door is detected in the closed position and for issuing an alarm signal and blocking access to the disk drive device when position of the door is open; and alarm means operable in response to the alarm signal from said control unit for indicating an alarm when the door is detected in the open position.