DE225462C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

- JV * 225462 - CLASS 34 /. GROUP

in Vienna.

Patented in the German Empire on May 17 , 1908 .

This invention relates to vacuum jacketed vessels such as those used for the storage of Liquids or other materials that have a warming or cooling effect the outside temperature should be withdrawn as far as possible. So far such vessels have been used Made only of glass (De was see vessels, thermos flasks) and were natural very fragile. Such vessels made of metal

ίο did not come in practical execution so far in the trade. It is true that metal vessels were made in which the two vessel parts are connected at the mouth by an intermediate piece made of heat-insulating material; but this is precisely because of the supports which are supposed to form the airtight seal thermal conduction is given to thin metal parts, which significantly reduces the effect, even if these metal parts are so thin. In another embodiment, the intermediate piece with the vessel jackets fused by means of glass flux or enamel, which is therefore difficult to carry out in practice, because during the melting process the vessel jackets are deformed and when the Vessels hairline cracks are almost inevitable, through which air then enters. In addition, is at With this method an evacuation of the gap is difficult to carry out. Furthermore, a putty is used as a binding agent according to a different type of construction, which also has disadvantages and is practically equally heavy, because the temperature differences in the cement in its Durability suffers no matter how viscous it is. In addition, in all of these types of execution the intermediate pieces as a result. Unsuitable for their brevity, real heat insulators to build.

The invention is now characterized in that. that the heat flow before it is on the metal outer wall of the vacuum jacket crosses. (or vice versa), 'a piece of one poor heat conductor, which has two independent metal coatings, in the path is laid, the metal vessel jackets fused with it in an airtight manner or are soldered. ·

Because the heat is radiated from the hot vessel contents in a known manner the mirror finish of the walls and the careful evacuation of the space between If both vessel jackets are prevented or at least greatly reduced, the temperature equalization is mainly limited to that Heat dissipation by conduction along the vessel walls, and there is a worse result Heat conductor has to be passed before the heat can penetrate into the metal outer wall, Here, too, the temperature compensation can only take place very slowly in this way and the contents of the container remain hot or cold for a long time. It doesn't matter whether the inner vessel jacket is completely empty or only in its upper part from the poor heat conductor, like glass, porcelain, clay ο. Like., exists. Interior and exterior walls can also be used

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of the vessel itself again be formed as evacuated double jackets, since two are nested Vacuum jacketed vessels are formed, which at the neck with each other only by one sufficiently long pipe sockets made of poorly conductive material, provided with metal coatings, but not metallically connected. If this connecting piece is fused or soldered to the necks in an airtight manner, it can

1.0 also the space between the two vacuum jackets evacuated and in this way a so-called four-walled vessel can be created.

The same principle can be used for larger meal bowl-shaped vessels of this type Cover to be built, whereby here too the heat balance by conduction from the inner Cover surface to the outer only via an inserted and with the metal points of the A piece of bad heat conductor that is fused or soldered airtight to the lid, which is provided on the edge with the mentioned metal coatings, can be done while another heat balance by evacuating the lid cavity and polishing it with a gloss its surfaces is prevented as much as possible.

Figs. 1 and 2 show embodiments. of the subject matter of the invention, namely Fig. 1 a vial-shaped vessel with double jacket a and b made of metal, the inner vessel a with the outer jacket b by a ring c made of poorly conductive material, such as glass, porcelain, clay o -Melting or soldering of the metal coating to the vessel jackets gas-tight. are bound while the space between a and b is evacuated.

Fig. 2 shows a four-walled vessel. α and b is the vacuum jacket of the inner vessel, e, f form a second vacuum jacket enclosing the same, which is connected by the insulating piece c made of glass, porcelain or the like, but also cork, paper mache, ebonite or the like. With a suitable choice of the insulating material and an airtight connection of the same to the two vacuum jackets in the sense of the aforementioned connection piece, space g can also be evacuated. In this case, the outer jacket e, f can also be replaced by a simple sheet metal jacket.

The two vessel walls in both embodiments can pass through in the vacuum space inserted discs, blocks or rings made of asbestos or other poor heat conductors are protected from contact with one another and the outer wall is also covered with a thermal insulator (felt, leather, etc.) will.

This invention is intended to offer the possibility of using vessels with vacuum jackets almost entirely or at least in the outer part most exposed to the risk of breakage made of metal and thus the great fragility of those previously on the market Bypass vacuum jacketed vessels without losing anything in terms of thermal insulation effectiveness. Also can such vessels can be produced in any shape and size.

Claims (2)

Godfather sayings: 1. Double-walled vessel according to Dewar, with the outer and inner vessel on. their mouths are connected by an annular intermediate piece made of heat-insulating material, characterized in that the intermediate piece (c) is provided with metal coatings (d) at the connection points of the jackets, with which the inner and outer vessels are soldered. 2. Double-walled vessel according to Dewar according to claim 1, characterized in that that the outer and inner vessels are designed as double-walled vessels. 1 sheet of drawings.