Method of making annealed copper ruby glass articles

Claim 1

THE METHOD OF MAKING ANNEALED COPPER RUBY GLASS ARTICLES WHICH COMPRISES PROVIDING A GLASS MIX INCLUDING SAND, A COPPER COMPOUND IN AMOUNT CORRESPONDING TO 0.02 TO 0.5 PART OF CUPROUS OXIDE PER 100 PARTS OF SAND, AND A METALLIC CYANOGEN COMPOUND SELECTED FROM THE GROUP CONSISTING OF METAL CYANIDES, CYANATES AND CYANAMIDES, THE CYANOGEN COMPOUND BEING PRESENT IN AMOUNT CORRESPONDING TO 1 TO 9 PARTS OF SODIUM CYANIDE PER 100 PARTS OF SAND, MELTING SAID MIX, FABRICATING SAID MELTED MIX INTO A SERIES OF ARTICLES OF LIGHT GREEN COLORING, AND HEATING THE SAID GLASS ARTICLES WHILE CONVEYING THEM IN SEQUENCE THROUGH A LEHR AT TEMPERATURES FROM 1100* F. TO 1150* F. FOR A PERIOD OF FROM FIFTEEN TO TWENTY-FIVE MINUTES TO PRODUCE IN EACH OF SAID ARTICLES A RUBY COLOR TRANSMITTING 68% TO 80% OF LIGHT RAYS OF A WAVE LENGTH OF 690 MU AND NOT MORE THAN 16% OF LIGHT RAYS OF A WAVE LENGTH OF 550 MU WHEN CORRECTED FOR A GLASS THICKNESS OF ABOUT 2 MM.

Claim 2

THE METHOD OF MAKING ANNEALED COPPER RUBY GLASS ARTICLES WHICH COMPRISES PROVIDING A GLASS MIX INCLUDING SAND, A COPPER COMPOUND IN AMOUNT CORRESPONDING TO 0.02 TO 0.5 PART OF CUPROUS OXIDE PER 100 PARTS OF SAND, AND A METALLIC CYANOGEN COMPOUND SELECTED FROM THE GROUP CONSISTING OF METAL CYANIDES, CYANATES AND CYANAMIDES, THE CYANOGEN COMPOUND BEING PRESENT IN AMOUNT CORRESPONDING TO 1 TO 9 PARTS OF SODIUM CYANIDE PER 100 PARTS OF SAND, MELTING SAID MIX, FABRICATING SAID MELTED MIX INTO A SERIES OF ARTICLES OF LIGHT GREEN COLORING, AND HEATING THE SAID GLASS ARTICLES WHILE CONVEYING THEM IN SEQUENCE THROUGH A LEHR AT TEMPERATURES FROM 1100* F. TO 1150* F. FOR A PERIOD OF FROM FIFTEEN TO TWENTY-FIVE MINUTES TO PRODUCE IN EACH OF SAID ARTICLES A RUBY COLOR TRANSMITTING 68% TO 80% OF LIGHT RAYS OF A WAVE LENGTH OF 690 MU AND NOT MORE THAN 16% OF LIGHT RAYS OF A WAVE LENGTH OF 550 MU WHEN CORRECTED FOR A GLASS THICKNESS OF ABOUT 2 MM.