PURPOSE:To improve the heat insulating property, prevent unstable heat accumulation in earth and increase the amount of heat accumulation by filling a filler which is a water impregnated porous material with a high ratio of porosity into the inner and outer circumferences of a spiral heat conductor and at the same time covering its outer circumference with a water-proof sheet. CONSTITUTION:A hole ...

PURPOSE:To make it possible to use a heat accumulator in a heat pump and prevent the water leakage from a casing by installing in the casing the heat accumulator which is formed by filling into an elastic sealed vessel a high water containing gel substance. CONSTITUTION:In the inside of a casing 2 many heat accumulators 3 are provided in which a gel substance containing high proportion of water is...

PURPOSE:To keep the performance of an alkali storage battery at a high level by atomizing molten Zn mixed with Al and Hg or further mixed with an element for increasing hydrogen overvoltage and by using the resulting powder as an cathode active material. CONSTITUTION:Molten Zn is mixed with Al and Hg or further mixed with one or more among Pb, In, Cd, Te and Ga for increasing hydrogen overvoltage....

A dot matrix printing head on which the tips of the printing pins are supported on a matrix, in turn supported on a body designed to travel in the printing plane, in two side by side, parallel offset rows; mainly characterized by the fact that the matrix is supported in idle manner on the supporting body; the printing head presenting means for selectively turning the matrix into two angular positi...

The folding knife is provided with a pin for rotating the blade, which is offset with respect to the longitudinal axis of the handle, on the side opposite the spring, so as to decrease the efforts withstood by the blade stop on the latter, to increase the torque opposing inopportune closure during use, to constitute a stop-piece for protecting the hand from accidentally sliding along the handle. L...

A lockable slider for a slide fastener is disclosed which has a locking prong integral with a pull tab and engageable between two adjacent fastener elements. The locking prong has a rounded apex, an arcuate slide surface and a vertical lock surface, said slide surface extending a length greater than the space or pitch between adjacent elements such that the locking prong can move freely in sliding...