Abstract In accordance with the invention there is provided a heating sensing probe comprising an electric conductor rod having a tapered portion which terminates in a pointed tip at one end thereof, a film of heat sensitive electrical resistance material on the tapered portion and covering the pointed tip, a film of electrical insulator material on the film of resistance material but not covering the portion of the resistance material on the pointed tip, and a film of metal on the film of insulator material and on the portion of the resistance material which covers the pointed tip of the rod such that the film of metal is in electrical contact with the film of resistance material at the pointed tip but is otherwise electrically insulated from the resistance material and from the rod by the film of insulator material.
Inventors
👤 Verne R Brown
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-30 16:04
CPC Classifications
H; H05; H05B; H05B3/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
143 words
A heat sensing probe comprising an electrical conductor rod having a tapered portion which terminates in a pointed tip at one end of said rod, a film of heat sensitive electrical resistance material on said tapered portion and covering said pointed tip, a film of electrical insulator material on said film of resistance material, said film of insulator material terminating short of said pointed tip, and a film of electrical conductor material on said film of insulator material and on the portion of said film of resistance material which covers the pointed tip of said rod whereby said film of electrical conductor material is in electrical contact with said film of resistance material at said pointed tip, said film of electrical conductor material being otherwise electrically insulated from said film of resistance material and from said rod by said film of insulator material.
Claim 2
Dependent Claim
143 words
A heat sensing probe comprising an electrical conductor rod having a tapered portion which terminates in a pointed tip at one end of said rod, a film of heat sensitive electrical resistance material on said tapered portion and covering said pointed tip, a film of electrical insulator material on said film of resistance material, said film of insulator material terminating short of said pointed tip, and a film of electrical conductor material on said film of insulator material and on the portion of said film of resistance material which covers the pointed tip of said rod whereby said film of electrical conductor material is in electrical contact with said film of resistance material at said pointed tip, said film of electrical conductor material being otherwise electrically insulated from said film of resistance material and from said rod by said film of insulator material.
Claim 3
Dependent Claim
32 words
A heat sensing probe as set forth in claim 1 wherein said film of heat sensitive resistance material comprises a film of metal oxide having a thickness not exceeding about one micron.
Claim 4
Dependent Claim
18 words
A heat sensing probe as set forth in claim 1 wherein said electrical insulator material is polyimide resin.
Claim 5
Dependent Claim
25 words
A heat sensing probe as set forth in claim 3 wherein said film of electrical insulator material has a thickness not exceeding about 0.5 microns.
Claim 6
Dependent Claim
25 words
A heat sensing probe as set forth in claim 1 wherein the pointed tip of said rod has a radius not exceeding about 20 microns.