Method of fabricating grid electrodes

Claim 1

A METHOD OF FABRICATING FRAME GRID ASSEMBLIES COM-P PRISING FIXING A PLURALITY OF FRAMES ONA MANDREL, LAYING A WIRE HAVING A COEFFICIENT OF THERMAL EXPANSION SMALLER THAN THAT OF SAID MANDREL AROUND SAID MANDREL AND IN ENGAGEMENT WITH SAID FRAMES, HEATING SAID WIRE AND SAID FRAME FOR BRAZING SAID WIRE TO SAID FRAMES, AND HEATING AND CONTROLLING THE EXPANSION OF SAID MANDREL FOR PROVIDING SIMILAR RATES OF THERMAL GROWTH OF SAID WIRE AND SAID MANDREL.

Claim 2

A METHOD OF FABRICATING FRAME GRID ASSEMBLIES COM-P PRISING FIXING A PLURALITY OF FRAMES ONA MANDREL, LAYING A WIRE HAVING A COEFFICIENT OF THERMAL EXPANSION SMALLER THAN THAT OF SAID MANDREL AROUND SAID MANDREL AND IN ENGAGEMENT WITH SAID FRAMES, HEATING SAID WIRE AND SAID FRAME FOR BRAZING SAID WIRE TO SAID FRAMES, AND HEATING AND CONTROLLING THE EXPANSION OF SAID MANDREL FOR PROVIDING SIMILAR RATES OF THERMAL GROWTH OF SAID WIRE AND SAID MANDREL.

Claim 3

A METHOD OF FABRICATING GRID ELECTRODES WHICH UTILIZES A MLYBDENUM MANDREL HAVING A SURFACE WHICH IS NON-WETTABLE BY COPPER, SAID MANDREL HAVING A PERIPHERAL LENGTH OF EIGHT INCHES AND A WIDTH OF .8 INCH, AND A BRAZING FURNACE, SAID BRAZING FURNACE HAVING A PROTECTIVE ATMOSPHERE THEREIN AND BEING AT A TEMPERATURE BETWEEN 1090 AND 1140 DEGREES CENTIGRADE, SAID METHOD COMPRISING FIXING A PLURALITY OF COPPER CLAD, NICKEL PLATED MOLYBDENUM FRAMES IN SPACED APART RELATION ABOUT SAID MANDREL, SECURING AN END OF A TUNGSTEN WIRE TO ONE OF SAID FRAMES, WINDING SAID WIRE UNDER A PREDETERMINED TENSION IN A HELIX AROUND THE PERIPHERY OF SAID MANDREL AND IN CONTACT WITH SAID FRAMES, PLACING THE WOUND MANDREL IN SAID BRAZING FURNACE FOR A PERIOD OF FIVE MINUTES FOR HEATING ONLY THE OUTSIDE OF SAID MANDREL TO A TEMPERATURE ABOVE 1090 DEGREES WHEREBY THE COPPER ON SAID FRAMES IS MELTED, AND REMOVING SAID MANDREL FROM SAID BRAZING FURNACE BEFORE THE INSIDE OF SAID MANDREL REACHES A TEMPERATURE NEAR 1090 DEGREES CENTIGRADE FOR PREVENTING AN EXCESSIVE THERMAL GROWTH DIFFERENTIAL BETWEEN SAID MANDREL AND SAID WIRE.

Claim 4

A METHOD OF FABRICATING GRID ELECTRODES WHICH UTILIZES A MLYBDENUM MANDREL HAVING A SURFACE WHICH IS NON-WETTABLE BY COPPER, SAID MANDREL HAVING A PERIPHERAL LENGTH OF EIGHT INCHES AND A WIDTH OF .8 INCH, AND A BRAZING FURNACE, SAID BRAZING FURNACE HAVING A PROTECTIVE ATMOSPHERE THEREIN AND BEING AT A TEMPERATURE BETWEEN 1090 AND 1140 DEGREES CENTIGRADE, SAID METHOD COMPRISING FIXING A PLURALITY OF COPPER CLAD, NICKEL PLATED MOLYBDENUM FRAMES IN SPACED APART RELATION ABOUT SAID MANDREL, SECURING AN END OF A TUNGSTEN WIRE TO ONE OF SAID FRAMES, WINDING SAID WIRE UNDER A PREDETERMINED TENSION IN A HELIX AROUND THE PERIPHERY OF SAID MANDREL AND IN CONTACT WITH SAID FRAMES, PLACING THE WOUND MANDREL IN SAID BRAZING FURNACE FOR A PERIOD OF FIVE MINUTES FOR HEATING ONLY THE OUTSIDE OF SAID MANDREL TO A TEMPERATURE ABOVE 1090 DEGREES WHEREBY THE COPPER ON SAID FRAMES IS MELTED, AND REMOVING SAID MANDREL FROM SAID BRAZING FURNACE BEFORE THE INSIDE OF SAID MANDREL REACHES A TEMPERATURE NEAR 1090 DEGREES CENTIGRADE FOR PREVENTING AN EXCESSIVE THERMAL GROWTH DIFFERENTIAL BETWEEN SAID MANDREL AND SAID WIRE.