Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Patent
1988-01-29
1989-08-08
Bartis, Anthony
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
219307, 219338, 219381, 219539, 219541, 338 22R, 338295, 338320, 338333, H05B 310, F24H 304, F24H 110, H01C 702
Patent
active
048555711
ABSTRACT:
An electric resistance heating element for heating fluids includes a plurality of ring-shaped members made of a ceramic material having a positive temperature coefficient (PTC) disposed in concentric generally coplanar relationship, one around the other, and spaced apart from each other to form through passages for fluid flow therebetween. Electrode layers are formed at the two opposite ends of each ring and a pair of electrically conductive securing ring members are each securely soldered to a respective one of the electrode layers. Each securing ring member is integrally formed with two diametrical cross members soldered to each ceramic ring-shaped members and with each cross member having spaced grooves radially engaging and positioning the ring-shaped ceramic members. The outer periphery of each securing ring member incorporates a plurality of radially extending lugs for mounting the heating element for use and for making electrical connection between the securing ring member and a power supply.
REFERENCES:
patent: 1982382 (1934-11-01), Gumdelfinger
patent: 3492457 (1970-01-01), Subt
patent: 3775590 (1973-11-01), Gartner
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patent: 4162395 (1979-07-01), Kobayashi et al.
patent: 4232214 (1980-11-01), Shioi et al.
patent: 4585924 (1986-04-01), Pakula
patent: 4703153 (1987-10-01), Pelonis
Peng Cheng-Jien
Ting Ching-Jui
Bartis Anthony
Industrial Technology Research Institute
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