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US 6,707,358 B1Granted
High current bistable relay with arc suppression
AssigneeDeltrol Controls
InventorSally A. Massman
Life of this patent
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AssigneeDeltrol Controls
InventorSally A. Massman
Estimating the term…
A relay has a pair of fixed contacts, a pair of movable contacts adapted to be engaged and disengaged with the fixed contacts, and a solenoid having a coil and a plunger movable into and out of the solenoid, the plunger having an outer end operably connected to the movable contacts. The relay can maintain either of two stable positions in the absence of power to the coil, the two positions being a contact open or magnetically latched position and a closed or unlatched position. The invention is improved by a ball joint arrangement interconnecting the plunger and the movable contacts to enable wiping of the contacts on closure to remove thin film tarnish caused by oxidation of the Nobel metal contacts and to produce a torsional force which facilitates breaking of welds on opening. An insulator surrounds the movable contacts for cooling the arcing and magnetic fields are oriented with respect to the current in the contacts in a manner that applies a force on the current in the direction of the insulator.
A relay subject to prolonged arcing when contacts are moved away from each other and momentary arcing at near touch of the contacts and during contact bounce, and susceptible to thin film tarnish, the relay comprising:
In a relay having a pair of fixed contacts, a pair of movable contacts adapted to be engaged and disengaged with the fixed contacts, and a solenoid having a plunger movable into and out of the solenoid, the plunger having an outer end operably connected to the movable contacts, the relay being subject to arcing when the movable contacts are moved relative to the fixed contacts, the improvement comprising:
A relay comprising:
Dependencies are inferred from the claim text.