Fail-safe resistor

Details Fail-safe resistor Fail-safe resistor

1977-05-02

1978-07-18

Goldberg, Gerald

Electricity: power supply or regulation systems

Remote sensing

338325, 338334, 337297, H01C 712

Patent

active

041018206

ABSTRACT:
Each pair of two pairs of terminals is connected by a conducting strip formed of a metallic material deposited on a fragile support block. The terminal connectors are shaped in an interwoven pattern, with an intervening space, such that the support block will not break along the space pattern. The connector strips are connected by a resistance material deposited along the space pattern and overlapping the adjoining strips. The four terminals are connected into a circuit arrangement so that the resistance material forms part of a vital resistor network which if interrupted causes that circuit arrangement to assume a safe condition. Any rupture of the resistance material and/or the support block due to thermal differences or mechanical force interrupts the continuity of one or both connector strips to create a safe failure condition.

REFERENCES:
patent: 3887893 (1975-06-01), Brandt et al.
patent: 3898603 (1975-08-01), Cricchi et al.
patent: 3978443 (1976-08-01), Dennis et al.
patent: 4031497 (1977-06-01), Ozawa

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