Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1986-07-07
1988-02-09
Orsino, Joseph A.
Communications: electrical
Condition responsive indicating system
Specific condition
374184, 374139, 374179, 136232, 136234, 324 61P, 340596, G08B 2100, G01K 112, G01K 700, H01L 3502
Patent
active
047244283
ABSTRACT:
A thermocouple jacket monitor is disclosed. The thermocouple monitor is constructed utilizing an inner jacket and an outer jacket with a replaceable conductive metal strip sandwiched between the inner jacket and a central insulator housing the thermocouple junctions. The conductive metal strip is connected to an alarm circuit in the thermocouple head. When the outer and inner jackets are corroded away by a molten material, such as molten glass, exposing the conductive metal strip to the molten material, the alarm such as a light on the thermocouple head, or the control panel or both, is lit notifying the operator that the thermocouple is damaged and needs to be replaced. If a two-way continuity alarm circuit is utilized, a second alarm light is activated when any portion of the conductive metal strip is corroded to the extent of being separated. Additional resistivity is provided to the thermocouple jacket monitor by coating the portion of the jacket or jackets coming into contact with a molten material with a metal or metal alloy. A third, capacitive alarm circuit may provide an initial alarm when a portion of the metal or metal alloy coating of the outer jacket corrodes away.
REFERENCES:
patent: 2865785 (1958-12-01), Coles
patent: 3436203 (1969-04-01), Wu
patent: 3580078 (1971-05-01), MacKenzie
patent: 4295092 (1981-10-01), Okamura
patent: 4428686 (1984-01-01), Brax
Emhart Industries Inc.
Jackson Jill D.
Moore Arthur B.
Orsino Joseph A.
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