Preactivated, batch fireable getter with integrated, miniature, single-actuation, extremely high-temperature bakeable valve
AssigneeRaytheon Company
InventorsCliff L. Shock, Michael A. Feeley, John Kenneth Venezia
Life of this patent
Estimating the term…
Abstract
A getter assembly is provided and includes a first canister, an internal can including getter, and a second canister. The internal can is disposable in the first canister to occupy a first position at which the getter is hermetically sealable and second positions at which the getter is exposed to an exterior environment. The second canister is engageable with the first canister to drive movements of the internal can between the first position and the second positions following activation and hermetic sealing of the getter.
Claims15
A method of preparing getter assemblies for installation into a dewar, wherein each of the getter assemblies comprises a valve, getter, vents and braze alloy and the method comprises:
- placing the getter assemblies in a furnace with the respective valves closed and the respective vents open;
- and
- evacuating the furnace,
- wherein, with the getter assemblies placed in the furnace and the furnace evacuated, the method further comprises:
- executing an activation soak of the getter assemblies to activate the respective getters;
- and
- executing a brief thermal excursion of the getter assemblies to cause the respective braze alloys to melt and flow into the respective vents to thereby hermetically seal the respective getters.
A method of assembling a getter assembly, the method comprising:
- disposing an internal can comprising a getter in a first canister to occupy a first position at which the getter is hermetically sealable and second positions at which the getter is exposed to an exterior environment;
- coupling a second canister with the internal can;
- and
- engaging the second canister with the first canister to drive movements of the internal can between the first position and the second positions following activation and hermetic sealing of the getter.
A method of preparing a getter assembly for installation into a dewar, the method comprises:
- placing the getter assembly in a furnace with a valve thereof closed and a vent thereof open;
- and
- evacuating the furnace,
- the method further comprising:
- activation soaking the getter assembly to activate a getter thereof;
- and
- executing a brief thermal excursion of the getter assembly to cause a braze alloy thereof to melt and flow into the vent to hermetically seal the getter.
Dependencies are inferred from the claim text.