Universal portable tool

Claim 1

IN A UNIVERSAL PORTABLE POWER TOOL, A CASING, A MOTOR HAVING A HOLLOW ROTOR MOUNTED WITHIN SAID CASING, A SLEEVE ROTATABLY JOURNALED WITHIN SAID HOLLOW ROTOR AND HAVING A DRIVE GEAR AT ONE END THEREOF AND A SOCKET AT THE OPPOSITE END THEREOF IN COMMUNICATION WITH SAID SLEEVE, A PLURALITY OF RETAINERS PROJECTING OUTWARDLY FROM SAID SOCKET AND ADAPTED TO INTERCHANGEABLY SUPPORT A SELECTED TOOL FOR WORKING ON AN ARTICLE, A PLURALITY OF STATIONARY RETAINERS PROJECTING FROM THE OPPOSITE SIDE OF SAID CASING OUTWARDLY OF SAID SLEEVE AND ADAPTED TO SUPPORT A HOLDING DEVICE FOR AN ARTICLE TO BE WORKED UPON, A GEARED DRIVE CONNECTION FROM SAID MOTOR TO SAID ANNULAR GEAR FOR ROTATABLY DRIVING SAID ANNULAR GEAR AND SOCKET, SAID GEARED DRIVE CONNECTION INCLUDING TWO CIRCUMFERENTIALLY SPACED IDLER PINIONS AND GEARED DRIVE TRAINS DRIVING SAID PINIONS AT DIFFERENT SPEEDS, A CHANGE SPEED DISC DETACHABLY MOUNTED ON SAID STATIONARY RETAINER AND POSITIONABLE IN TWO DIFFERENT POSITIONS ON SAID RETAINER, SAID CHANGE SPEED DISC HAVING TWO CIRCUMFERENTIALLY SPACED DRIVE PINIONS ROTATABLY CARRIED THEREBY AND MESHING WITH SAID ANNULAR GEAR IN EACH POSITION OF SAID CHANGE SPEED DISC, AND MESHING WITH ONE IDLER PINION IN ONE POSITION OF SAID CHANGE SPEED DISC AND WITH THE OTHER IDLER PINION IN ANOTHER POSITION OF SAID CHANGE SPEED DISC.