摘要:
Uniform microspheres substantially or completely free from internal cavities and voids are prepared by spraying an aqueous hydrated metal oxide solution onto the surface of a water-immiscible organic liquid containing from 0.04 to 2.0 percent by volume of a surface active agent, the viscosities of each of the organic and inorganic phases plus the amount of surface active agent within the above range being selected such that there is sufficient surface active agent present to prevent the globules from adhering to each other yet an insufficient amount to prevent deformation from the substantially spherical shape.
摘要:
Fissile element that can be easily assembled and also afterwards taken apart. This is facilitated by the use of tilting bolts and snap connections. The assembling may be done by freezing in of the bunch of fissile rods in demineralized water.
摘要:
An automatic self-adjusting balancing device for a member mounted for rotation around a vertical spindle comprising a hollow housing rotating with said member and having an inner circular wall component which is coaxial with the spindle; at least two loose rotational bodies within said housing, each body having a circular rim edge which spans said vertical spindle, said rim edge having a smaller diameter on its upper side than on its lower side, at least one of said bodies being tiltable about its larger diameter against said inner wall component of said housing.
摘要:
A METHOD IS DISCLOSED OF PREPARING SPHERICAL PARTICLES OF ACTINIDE HYDROXIDE GEL, WHICH PARTICLES CAN BE CONVERTED BY THERMAL TREATMENT INTO SPHERICAL OXIDE, AND IF CARBON HAS BEEN INCORPORATED INTO THE GEL, CARBIDE PARTICLES. SPHERICAL ACTINIDE OXIDE AND CARBIDE PARTICLES ARE NEEDED IN NUCLEAR TECHNICS. AN ACTINIDE HYDROXIDE SOL IS MIXED WITH A SOLUTION OF ONE OR MORE AMMONIUM DONORS AND SUBSEQUENTLY GELLED BY DISPERSION INTO A HOT LIQUID NONMISCIBLE WITH WATER.
摘要:
A gastight seal for a rotating spindle or the like is made by tightly fitting an externally spirally ribbed element into a bore in another element and machining out that part of the element which projects inside the spiral rib so as to leave only the spiral rib flexed within the bore.