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US 4,000,480 AGranted
Switching device
AssigneeBell Telephone Laboratories, Incorporated
InventorsEoin Wedderburn Gray, Daniel Vincent McCaughan
Life of this patent
Estimating the term…
Abstract
A switching device includes a combination of a fixed contact, first and second electrically connected movable contacts, and an arrangement for moving the movable contacts so that the first movable contact closes to the fixed contact before the second movable contact closes to the fixed contact and so that the first movable contact opens from the fixed contact after the second movable contact opens therefrom.
Claims4
A relay comprising:
- a fixed contact;
- first and second wire springs each wire spring having a free end and a fixed end, the wire springs connected electrically at their fixed ends;
- a contact attached to the free end of each of the wire springs;
- and
- an insulating armature card means moving the free ends of the two wire springs so that the contact of the first wire spring closes to the fixed contact before the contact of the second wire spring closes to the fixed contact and so that the contact of the first wire spring opens from the fixed contact after the contact of the second wire spring opens from the fixed contact.
2 more elements
Dependencies are inferred from the claim text.