DE425602C - Process for the production of electric radiators - Google Patents

Description

GERMAN EMPIRE

ISSUED ON
FEBRUARY 22, 1926

REICH PATENT OFFICE

PATENT LETTERING

- M 425602 CLASS 21h GROUP

(P 47923

Prometheus Akt-Ges. for electrical heating systems in Frankfurt a. M.

Process for the manufacture of electric radiators.

Patented in the German Empire on April 12, 1924.

The invention consists in a method '

for the production of electrical heating elements, in which the heating resistor is in a ceramic

Insulation compound is embedded and covered with a zy-Iindrischen hollow body. Such electric radiators are known per se.

They are made either in the way, that the heating conductor applied to the finished ceramic core, with a

ίο layer of ceramic material surround and is then introduced into the hollow body in order to then finish-fired in this hollow body to become. There are also known methods in which the radiator produced by changing the shape of the hollow body or by exerting pressure from the inside on the insulation material will. All of these procedures have a number of shortcomings caused by the Processes forming the subject of the invention

be avoided. The method consists in that first ceramic cylindrical Parts ι are produced (Fig. Ι and 2), which are only burned so far, and their composition is chosen so that they are as porous as possible, but still sufficient mechanical for their purposes Possess strength. These bodies 1 are atifgeschoben on a metallic carrier 2, which is either solid, as shown in Fig. 1, or with larger diameters, as in Fig. 2 shown, can be hollow and its shape according to the respective conditions is chosen. The connection can optionally also be carried out with the omission of the metal insert done by cementing the correspondingly shaped porous body. On this rod or core created in this way, the Coiled heating conductor 3. As such, ribbon-like or wire-like can be used as desired Find heating conductors use. The ceramic radiator can be equipped with grooves or the like. be provided. The hollow body 4 is then up to the required height with a Ceramic casting compound 5 produced by one of the known methods is filled and the heating rod 1, 3 while maintaining a central position in the hollow body 4 introduced. The core consisting of the parts 1 withdraws from the casting compound 5 their moisture, which can then be driven out by slow heating. Of the The entire radiator is then completely burned by heating. The outer shape of the hollow body depends on the required,

Fig.i.

nits that the radiator in question is intended to serve.

With this method it is possible to produce very long cylindrical radiators which neither subsequently changes the shape of the cylindrical hollow body nor more deficient Thermal contact between the heating conductor and the hollow cylinder can occur.

Claims (3)

Patent Claims: i. Process for the production of electric radiators with in a ceramic Heating resistor embedded in insulation compound and encased in a hollow body, characterized in that the heating conductor is wound onto a porous ceramic base and the cavity between the outer hollow body and the heating conductor by potting means one of the known ceramic casting processes takes place, followed by the cooking firing. 2. The method according to claim 1, characterized in that the porous ceramic The carrier for the heating conductor is composed of individual parts, which are supported by a metallic carrier, which acts as a return conductor can serve, be held together. 3. The method according to claim 1, characterized in that the individual parts of the porous ceramic carrier for the heating conductors connected to one another by cementing are.