液態空氣を利用する低温用恒温凾と低温用引張並に硬度試驗器

抄録

An increasing demand of making use of sub-zero temperatures in the scientific as well as in the industrial field has brought an growing activity to the study of the properties of metals and alloys at low temperatures, especially, of their mechanical properties. Here is described the construction of a cryostat-box whose wall is made of carbonized cork boards. The interior of this box can be cooled, by the aid of liquid nitrogen, down to -130°, and preserve it with the accuracy, a few tenth -of one degree. In this cryostatat-box is placed a portable type tensometer, i.e. a small size testing machine, the construction and the manipulation of which are also explained here.