Lens edging machines

Claim 1

IN A LENS EDGING MACHINE OF THE CHARACTER DESCRIBED, THE IMPROVEMENT CONSISTING OF A DIRECT READING SIZE SETTING MECHANISM FOR SELECTIVELY POSITIONING AN ADJUSTABLE SHOE RELATIVE TO THE EFFECTIVE LENS ABRADING AREA OF A GRINDING WHEEL IN SAID MACHINE IN ACCORDANCE WITH DIFFERENT SIZES OF EDGING MACHINE PATTERNS WHICH ARE TO BE USED INTERCHANGEABLY ON SAID MACHINE AND WHEREIN SAID PATTERNS FUNCTION DURING SIMULTANEOUS ROTATION THEREOF COAXIALLY WITH A LENS BEING EDGE GROUND TO ENGAGE SAID SHOE AND PROVIDE SAID LENS WITH A CONTOUR SHAPE CORRESPONDING TO THAT OF THE PATTERN BEING USED WHILE THE SIZE TO WHICH SAID LENS IS GROUND IS DETERMINED BY THE RELATED POSITIONS OF SAID ADJUSTABLE SHOE AND SAID EFFECTIVE ABRADING AREA OF SAID GRINDING WHEEL, SAID SIZE SETTING MECHANISM COMPRISING A SUPPORTING AXLE FIXED TO SAID MACHINE, A SLEEVE JOURNALLED ON SAID AXLE AND ROTATABLE COAXIALLY THEREON, A CAM FIXED UPON A FIRST END OF SAID SLEEVE AND ROTATABLE THEREWITH, MEANS ASSOCIATED WITH SAID ADJUSTABLE SHOE AND IN ENGAGEMENT WITH SAID CAM FOR ADJUSTING SAID SHOE RELATIVE TO SAID EFFECTIVE LENS ABRADING AREA OF SAID GRINDING WHEEL IN RESPONSE TO ROTATION OF SAID CAM AND SLEEVE, A PAIR OF COAXIALLY RELATED ANNULAR PLATE MEMBERS DISPOSED IN SIDE-BY-SIDE RELATION WITH EACH OTHER WITH THE RESPECTIVE PLANES OF THEIR SIDES DIRECTED SUBSTANTIALLY RIGHT ANGULARLY TO THE COMMON AXIS OF SAID AXLE AND SLEEVE, A FIRST OF SAID PLATE MEMBERS BEING FIXED TO THE SECOND END OF SAID SLEEVE FOR ROTATION THEREWITH ABOUT SAID AXLE, MEANS SUPPORTING THE SECOND OF SAID PLATE MEMBERS ROTATABLY ON SAID AXLE, A KNOB SECURED TO A SIDE OF SAID SECOND PLATE MEMBER FOR MANUALLY OPERATING SAID SIZE SETTING MECHANISM, MEANS FUNCTIONING TO RESILIENTLY BIAS SAID SECOND PLATE MEMBER AGAINST SAID FIRST PLATE MEMBER TO RENDER SAID MEMBERS ROTATABLE AS A UNIT BY ACTUATION OF SAID KNOB, SAID BIASING MEANS BEING CONSTRUCTED AND ARRANGED TO PERMIT AXIAL MOVEMENT OF SAID SECOND PLATE MEMBER AND KNOB AWAY FROM SAID FIRST PLATE MEMBER TO RENDER SAID SECOND PLATE MEMBER INDEPENDENTLY ROTATABLE TO DIFFERENT ORIENTED POSITIONS RELATIVE TO SAID FIRST PLATE MEMBER, MARKINGS ON RESPECTIVE EDGES OF SAID FIRST AND SECOND PLATE MEMBERS FOR INDICATING SELECTED ORIENTED POSITIONS OF SAID SECOND PLATE MEMBER RELATIVE TO SAID FIRST PLATE MEMBER IN ACCORDANCE WITH THE SIZE OF AN EDGING MACHINE PATTERN SELECTED FOR USE ON SAID LENS EDGING MACHINE, A LENS SIZE DETERMINING SCALE ARRANGED CIRCUMFERENTIALLY ON SAID KNOB READABLE RELATIVE TO A FIXED POINTER ON SAID MACHINE FOR ADJUSTING SAID SIZE SETTING MECHANISM IN ACCORDANCE WITH THE ULTIMATE SIZE DESIRED OF A LENS TO BE EDGE GROUND IN SAID MACHINE.