Contact switch coating
AssigneeLittelfuse, Inc.
InventorsPhilip Warner Lees, Joshua James Koeppel, J. Anthony Spies, Eric James Hafenstein
Life of this patent
Estimating the term…
Abstract
Switch assemblies and switching methods are disclosed. In some embodiments, a switch assembly may include a first blade having a first contact within an enclosed cavity, and a second blade having a second contact within the enclosed cavity. The first and second contacts are operable to make or break contact with one another in response to a magnetic field. The switch assembly may further include a coating formed over each of the first and second contacts, the coating including a titanium layer, a second layer formed over the titanium layer, and a tungsten-copper layer formed over the second layer. In some embodiments, the second layer is copper or molybdenum.
Claims10
A switch assembly comprising:
- a first blade having a first contact within an enclosed cavity;
- a second blade having a second contact within the enclosed cavity, the first and second contacts operable to make or break contact with one another in response to a magnetic field;
- and
- a coating formed over each of the first and second contacts, the coating comprising:
- a base conductive layer;
- a second conductive layer formed over the base conductive layer;
- and
- a tungsten-copper layer formed over the second conductive layer.
A reed switch, comprising:
- a first blade having a first contact within an enclosed cavity;
- a second blade having a second contact within the enclosed cavity, the first and second contacts operable to make or break contact with one another in response to a magnetic field;
- and
- a coating formed over each of the first and second contacts, the coating comprising:
- a base conductive layer;
- a second conductive layer formed over the base conductive layer;
- and
- a tungsten-copper layer formed over the second conductive layer.
Dependencies are inferred from the claim text.