초록

There are disclosed several embodiments of dewars each of which include an insulated apparatus for storing and delivering a liquid cryogen and a capacitance gauge for measuring the liquid level of cryogen. A process for rapidly filling the vessel with cryogen is also disclosed.

대표청구항 ▼

[ What is claimed is:] [1.] Apparatus for storing and delivering liquid cryogen, comprising:an insulated vessel having spaced end walls and a side wall extending between the end walls, the side wall being of such shape as to define a circle within a plane perpendicular to a first axis of the vessel

[ What is claimed is:] [1.] Apparatus for storing and delivering liquid cryogen, comprising:an insulated vessel having spaced end walls and a side wall extending between the end walls, the side wall being of such shape as to define a circle within a plane perpendicular to a first axis of the vessel and being arcuate about a second axis of the vessel lying in the plane;first means for supplying and delivering liquid cryogen to and from the vessel including a first conduit mounted in the vessel for rotation about the first axis as well as rotation about the second axis and being of such length that its open end closely circumscribes the inner surface of the side wall and sweeps closely past the arcuate inner surface of the side wall from one end wall to the other, as the orientation of the vessel changes,second means through which a gas may be supplied to or exhausted from the vessel above the level of the liquid cryogen, andmeans connecting the first conduit with the exterior of the vessel in such a manner that liquid cryogen may be supplied to or exhausted from the first conduit in any orientational positions of the vessel, the rotation of the first conduit permitting substantially all of the liquid cryogen in the vessel to be exhausted therefrom.