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US 5,497,133 AGranted
Switch with improved contacts for use in high temperature environments
AssigneeHoneywell Inc.
InventorsArthur W. Dawson, Kundan L. Malik
Life of this patent
Estimating the term…
Abstract
A switch is made for use in elevated temperatures. A first stationary contact carrier is made of stainless steel and configured to be rigidly attached to a first stationary contact pad that is made of a nickel silver alloy. A second stationary contact pad of fine silver is used as the normally opened contact. A movable contact pad made of a silver cadmium oxide alloy is movable from a first position in contact with the normally closed first contact pad to a second position in contact with the normally opened second stationary contact pad.
Claims12
A switch, comprising:
- a first stationary contact carrier;
- a first contact pad rigidly attached to said first stationary contact carrier, said first contact pad comprising a nickel silver alloy;
- a second stationary contact carrier;
- a second contact pad rigidly attached to said second stationary contact carrier, said second contact pad comprising fine silver;
- a movable contact carrier;
- and
- a third contact pad rigidly attached to said movable contact carrier, said third contact pad comprising a silver cadmium oxide alloy.
4 more elements
A switch, comprising:
- a first stationary contact carrier, said first stationary contact carrier being made of stainless steel;
- a first contact pad rigidly attached to said first stationary contact carrier, said first contact pad comprising a nickel silver alloy;
- a second stationary contact carrier;
- a second contact pad rigidly attached to said second stationary contact carrier, said second contact pad comprising fine silver;
- a movable contact carrier;
- and
- a third contact pad rigidly attached to said movable contact carrier, said third contact pad comprising a silver cadmium oxide alloy.
4 more elements
A switch, comprising:
- a first stationary contact carrier, said first stationary contact carrier being made of stainless steel;
- a first contact pad rigidly attached to said first stationary contact carrier, said first contact pad comprising a nickel silver alloy;
- a second stationary contact carrier, said second stationary contact carrier being made of a nickel iron alloy;
- a second contact pad rigidly attached to said second stationary contact carrier, said second contact pad comprising fine silver;
- a movable contact carrier;
- and
- a third contact pad rigidly attached to said movable contact carrier, said third contact pad comprising a silver cadmium oxide alloy.
4 more elements
Dependencies are inferred from the claim text.