Coaxial reverse power protection relay

Details Coaxial reverse power protection relay Coaxial reverse power protection relay

1992-10-15

1993-11-02

Donovan, Lincoln

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Radio frequency switch

335151, H01H 5300

Patent

active

052587312

ABSTRACT:
A coaxial reverse power protection relay using a conductive elastomeric tube and a conductive body. The relay includes a reed switch enclosed within the central channel of the conductive body. The tube concentrically surrounds the reed switch within the channel. The tube retains the reed switch in place and serves as a conformal ground. A magnetic coil is wound around a portion of the body. When energized the coil produces a magnetic field which closes the reed switch. When de-energized, the coil's magnetic field ceases, opening the reed switch. The reed switch, along with center contacts form a center conductor within the channel of the relay body. The body and elastomeric tube form an outer conductor. The relay is impedance matched to RF connector and instrument transmission line impedances. A nonuniform impedance occurring along the length of the reed switch is balanced by the conforming tube walls. The internal wall of the conductive body has a retention thread in the vicinity of the reed switch. Such threading holds the tubing in place during installation.

REFERENCES:
patent: 3575678 (1971-04-01), Barton
patent: 3928829 (1975-12-01), Abrams
patent: 4232281 (1980-11-01), Smith
patent: 4870385 (1989-09-01), Jewell

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