Cartridge autoloading apparatus having two safety lock mechanisms

A cartridge autoloading apparatus attached to a cartridge recording and retrieval apparatus, said cartridge autoloading apparatus comprising:

• a body which includes;
• a crown plate,
• a bottom plate, and
• a perforation path perforated in a vertical direction of said body;
• a magazine set in the perforation path, said magazine accommodating a plurality of cartridges;
• magazine ascending and descending means, provided in said body, for ascending and descending said magazine via the perforation path;
• cartridge loading means, provided in said body, for loading one of the cartridges in the magazine, into the cartridge recording and retrieval apparatus;
• first safety lock means, located at the crown plate of said body, for stopping an operation of said magazine ascending and descending means if the magazine is made to descend with an abnormal condition;
• second safety lock means, located at the bottom plate of said body, for stopping an operation of said magazine ascending and descending means if the magazine is made to ascend with the abnormal condition;
• and
• switch means, responsive to said first safety lock means and to said second safety lock means, for stopping the operation of said magazine ascending and descending means.