Electrical transmission or interconnection systems – Personnel safety or limit control features – Interlock
Patent
1986-12-08
1989-06-20
Zazworsky, John
Electrical transmission or interconnection systems
Personnel safety or limit control features
Interlock
307303, 357 28, H01L 2700
Patent
active
048411701
ABSTRACT:
A hybrid circuit structure includes an electrical circuit and a heating circuit therefor, both mounted on a single substrate. Valuable substrate space is saved by mounting the electrical circuit components on one surface of the substrate and the heating circuit elements on the opposite surface. A temperature control circuit is included, preferably mounted on the same surface as the electrical circuit components. Precision resistors for gain control and other functions may be provided on a separate substrate which may be mounted directly to the single substrate or to a separator therebetween. The precision resistors are in thermal contact with the temperature controlled heating circuit, thereby further increasing the stability of the circuit.
REFERENCES:
patent: 3444399 (1969-05-01), Jones
patent: 3571517 (1971-05-01), Merryman
patent: 3703651 (1972-11-01), Blowers
patent: 3781515 (1973-12-01), Morris, Jr. et al.
patent: 4146903 (1979-03-01), Dobkin
Becker Stephen A.
Gopstein Israel
Ishimaru Mikio
John Fluke Mfg. Co. Inc.
Zazworsky John
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