Key duplicating machine

Abstract

Abstract AN AUTOMATIC KEY DUPLICATING MACHINE WHICH CAUSES KEY BLANK IN A FIXED POSITION RELATIVE TO A KEY MASTER TO TRAVERSE A ROTATING CUTTING MEMBER AND ONE OR MORE DEBURRING BRUSHES TO DUPLICATE THE CONFIGURATION OF THE KEY MASTER ON THE KEY BLANK. BOTH THE MASTER AND THE BLANK ARE FIXED RELATIVE TO ONE ANOTHER ON A MEMBER FORMING PART OF CARRIAGE MEANS WHICH ARE CAPABLE OF LINEAR TRANSLATORY MOTION WITH RESPECT TO THE APPARATUS SUPPORT MEANS, THE CUTTING MEMBER AND THE BRUSHES. MEANS, INCLUDING A CAM AND DRIVE ASSEMBLY, ARE DISCLOSED FOR TRANSLATING THE ROTATIONAL MOVEMENT OF A GEAR DRIVE MECHANISM TO CAUSE THE LINEAR MOTION OF A CARRIAGE MEMBER. THE CAM ASSEMBLY INCLUDES A BARREL CAM HAVING A CONTINUOUS GROOVE AND ALSO INCLUDES A CAM FOLLOWER FIXED IN THE GROOVE TO IMPART THE LINEAR MOTION TO THE CARRIAGE WHEN AUTOMATIC OPERATION IS DESIRED. THE GROOVE IN THE CAM HAS A SPIRAL PORTION TO GUIDE THE CAM FOLLOWER DURING AUTOMATIC OPERATION OF THE MACHINE AND AN AXIAL PORTION WHICH PERMITS MANUAL OPERATION OF THE MACHINE AND FREE RETURN OF THE CARRIAGE AFTER AUTOMATIC OPERATION. BIASING MEANS ARE PROVIDED TO MAINTAIN THE FORCE OF THE KEYS AND THE CARRIAGE MEANS AGAINST THE STATIONARY GUIDE BLADE ENGAGING THE SERRATIONS ON THE KEY MASTER AND THE ROTATING CUTTING MEMBER WHICH ENGAGES THE KEY BLANK. CONTROL MEANS ARE PROVIDED TO SELECT EITHER SINGLE-CYCLE AUTOMATIC OR MANUAL OPERATION OF THE MACHINE. THE CUTTER ASSEMBLY INCLUDES ONE OR MORE COUNTER-ROTATING DEBURRING BRUSHES MOUNTED ON AN AXIS CONCENTRIC WITH THE AXIS OF THE CUTTER WHEEL AND DRIVEN BY A PINION GEAR FROM THE DRIVE GEAR ON THE CUTTER MOTOR SHAFT SO THAT THE DIRECTION OF ROTATION OF THE BRUSH IS OPPOSITE TO THAT OF THE CUTTER WHEEL. THE MEANS FOR SECURING THE KEY BLANK AND THE KEY MASTER ON THE CARRIAGE INCLUDE A NOVEL LOCKING MEMBER AND PERMIT EASY POSITIONING OF THOSE ELEMENTS AS WELL AS STRONGLY SECURING THE ELEMENTS AGAINST INADVERTENT DISPLACEMENT DURING THE OPERATION.

Inventors

• 👤 Louis D Carlo
• 👤 Harold L Baker
• 👤 Philip C Hungerford Jr

Bibliographic Details