Glass electrode and method of making the same

Claim 1

A GLASS ELECTRODE FOR MEASUREMENT OF IONIC CONCENTRATION IN A TEST FLUID, SAID ELECTRODE COMPRISING IN COMBINATION: A FIRST TUBULAR BODY OF GLASS HAVING AN ION-SENSTIVE MEMBRANE OCCLUDING ONE EXTREMITY SO AS TO FORM A CHAMBER THEREAT; A SECOND TUBULAR BODY OF GLASS HAVING ONE END THEREOF GLASS SEALED, SAID SECOND BODY BEING DISPOSED WITHIN SAID FIRST BODY WITH SAID ONE END ADJACENT SAID CHAMBER; SAID SECOND BODY INCLUDING AN INTERGRAL SURROUNDING GLASS COLLAR ADJACENT SAID ONE END AND EXTENDING SUBSTANTIALLY PERPENDICULARLY FROM SAID SECOND BODY INTO FUSED CONTACT WITH THE INTERIOR WALL OF SAID FIRST BODY AT A PORTION THEREOF ADJACENT SAID EXTREMITY SO AS TO SEAL SAID CHAMBER; AN ELECTRICALLY CONDUCTIVE WIRE DISPOSED IN SAID SECOND BODY AND HAVING AN END PORTION THEREOF EXTENDING THROUGH SAID SEALED END INTO SAID CHAMBER; THE PORTION OF SAID LEAD WITHIN THE SAID SECOND BODY BEING SURROUNDED BY AN ELECTRIC SHIELD ENCASED WITHIN SAID SECOND BODY; AND AN ELECTROLYTIC MATERIAL DISPOSED WITHIN SAID CHAMBER AND FORMING AN ELECTRICAL CONTACT BETWEEN SAID MEMBRANE AND THE UNSHIELDED PORTION OF SAID LEAD.