Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
204 words
The method of fabricating a solid state electrolytic cell gas sensor head for detecting gases by dissociating the gases into species such as ions and complex ions and using either to generate an electrical signal, comprising: adding at least one metal oxide having a general formula MxOy, where M is a transition element metal, to a non-metal oxide having a general formula NpOq, where N is a non-metal selected from groups III and IV of the periodic table, and x, y, p and q are relatively small whole numbers; heating the mixture of MxOy - NpOq until dry and activated; adding a sufficient quantity of solvent to the mixture of MxOy - NpOq to form a paste; adding a small amount of platinum family oxide to the paste; coating a first quantity of the paste onto a fine, chemically inert, strong and ductile heating wire; inserting the coated heater wire into a space partially defined by a collector wire and then coating the assembly of the heater wire and the collector wire with the paste to form a bead with both wires therein; drying the paste; and baking the paste at at least one temperature in excess of 200°C to form the sensor head.
Claim 2
Independent Claim
204 words
The method of fabricating a solid state electrolytic cell gas sensor head for detecting gases by dissociating the gases into species such as ions and complex ions and using either to generate an electrical signal, comprising: adding at least one metal oxide having a general formula MxOy, where M is a transition element metal, to a non-metal oxide having a general formula NpOq, where N is a non-metal selected from groups III and IV of the periodic table, and x, y, p and q are relatively small whole numbers; heating the mixture of MxOy - NpOq until dry and activated; adding a sufficient quantity of solvent to the mixture of MxOy - NpOq to form a paste; adding a small amount of platinum family oxide to the paste; coating a first quantity of the paste onto a fine, chemically inert, strong and ductile heating wire; inserting the coated heater wire into a space partially defined by a collector wire and then coating the assembly of the heater wire and the collector wire with the paste to form a bead with both wires therein; drying the paste; and baking the paste at at least one temperature in excess of 200°C to form the sensor head.
Claim 3
Dependent Claim
55 words
The method of claim 1 wherein the metal oxide is stannic oxide, the non-metal oxide is silica gel made from sodium silicate, the stannic oxide and silica gel are mixed in the ratio of 6:1; and the mixture of stannic oxide and silica gel is dried and activated at a temperature between 200°C and 300°C.
Claim 4
Dependent Claim
44 words
The method of claim 1 wherein the solvent added to the mixture of MxOy - NpOq comprises two parts of alcohol and one part of water and the small amount of platinum family oxide added to the paste comprises 2 percent Pt 2 O.
Claim 5
Dependent Claim
90 words
The method of claim 1 wherein the heating wire comprises platinum family wire 2 mils in diameter and a 10 turn helix coil and the collector wire comprises platinum family wire 5 mils in diameter and a 6 turns helix coil and the heating wire is inserted inside the space defined by the coiled collector wire and the paste forms a bead completely covering a segment of the collector wire having the heating wire inserted therein and the space within the coils of the collector wire is filled with paste.
Claim 6
Dependent Claim
31 words
The invention of claim 1 wherein the heater element comprises 2 mils diameter, 10 turn coil platinum family wire and the collector comprises a plate fabricated from a platinum family foil.
Claim 7
Dependent Claim
46 words
The invention of claim 1 wherein the heater element comprises 2 mils diameter, 10 turn coil platinum family wire and the collector comprises a platinum family coiled wire having a segment of the coil adjacent the heating coil smashed down so as to form a plate.
Claim 8
Dependent Claim
46 words
The method of claim 1 wherein the bead is dried under infra-red light for 48 hours, then baked in an oven at 250°C for 4 hours, then baked in the oven at 450°C for 1 hour, then baked in the oven at 600°C for 1 hour.