DE2222143A1 - Thermocouple for thermoelectric safety devices on gas burners - Google Patents

Description

New phone number from 9.5.1972 363QTM3

Harnt, "000 Munich 23, FrailigrathstraBo 19 η InI In «D U Bohr Eltenacher StraB · 17 Pottfach 140 Ul P · ■ "I ng. H. ti. D α Π Γ p« t.-An. Bebltr

^ ■ ^ ■ ch ^H rT "" 3 ^Tr * " ^{ttpohl D |} P'-" Phyt. Eduard Betzier

⁵¹⁰¹⁴ Dlpl.-Ing. W. Herrmann-Trentepohl

Telephone address:. . ". _T - «- r« «.« "». «Ttlterammanichrift:

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TeItX 08 229 853 Τ · Ι · χ5 21 · 3βΟ

Γ "" 1 bank accounts:

Bavarian · Verairwbank MOnchan WUWT ΟΟΟ11 / O DraedfMr Bank AQ Htm · 7-5304 ·· LC. L. /. | 4d PMtwlMCkkonto Dortmund 551M

3517 B / hr

In your answer please ask for something Zwtchrltt Mttt to:

Collection box 3

May 5th 1972

SOCIETA ¹ ITALIANA TECNOMECCANICA "LA PRECISA" di Dr. P. EG. De 'STEPANI SAS

Yiale dell »Induatria 31/33 Padova (Italy)

Thermocouple for thermoelectric safety devices

on gas burners

Addendum to patent (see patent application P 17 73 278.4)

The invention relates to an improvement in thermocouples for thermoelectric safety devices on grass burners according to patent (see * patent application P 17 73 278.4).

The main patent relates to a thermocouple for safety gas burners with an outer and an inner thermoelectric arrester, which are connected to one another by a hot solder joint are connected, the outer arrester from the end of the cylindrical extension of an intermediate piece from. is pushed. The approach extends slightly towards the

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hot solder joint and the spacer is used for rapid heat dissipation.

According to the main patent, the outer conductor of the thermocouple is soldered to the attachment of the intermediate piece connected and the intermediate piece is at the end opposite the end with the cylindrical extension through a second solder joint with an outer tubular, connected to an output terminal electrode.

In the practical implementation of the thermocouple according to the main patent, the problem arose that the outer arrester two soldered connections between different materials had to be made, namely the first between the outer conductor and the extension of the intermediate piece and the second between the intermediate piece and the tubular electrode usually made of copper or aluminum.

But the production of good soldered connections between materials is of different types and compositions as is well known, always difficult. In addition, the time required for the construction of the device and its costs are all the greater, the more soldered connections have to be made.

The invention seeks to improve the thermocouple described in the main patent such that at least one Soldered connection can be dispensed with and greater security for the electrical connections of the thermocouple is achieved will.

The invention also seeks to create a thermocouple, its individual parts faster and easier

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assemble, which brings a considerable technical and economic advantage.

The invention solves these problems in that in a thermocouple according to the main patent with an outer conductor j, an inner conductor connected to this via a hot solder point, a tubular hollow electrode which is electrically connected to the outer conductor and is arranged concentrically at a distance from it , and with a hollow intermediate piece arranged concentrically on the tubular electrode for rapid heat dissipation, according to the invention the outer conductor is pushed from the outside onto one end of the tubular electrode that extends into the interior of the outer conductor over a length of at least 10 fo the total length of the Arrester extends, while the other end forms an output terminal and the soldering point between the outer arrester and the tubular electrode is located at the free end of the arrester and furthermore the hollow intermediate piece arranged concentrically on the electrode for rapid heat dissipation with its outer Conductor facing end forms a Aufnähmesteile for the soldered connection between the outer conductor and the tubular electrode.

The invention is described below with reference to Drawings explained in more detail, but only shows exemplary embodiments.

Fig. 1 is a schematic longitudinal section of the thermocouple, which already contain the improvement on which the invention is based and the corresponding device already is built in; ■

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Pig. 2 is a side view of the thermocouple and shows a possible embodiment of the devices for holding the auxiliary body on the tubular Electrode;

Pig. 3 shows a schematic longitudinal section of the thermocouple.

The shown thermocouple according to the invention consists of the outer arrester 10, which over the hot detachable parts 12 is connected to the inner conductor 11. The inner arrester 11 is via the cold contact 13 in a known manner connected to the element 14, which s.on the one hand with its end 14a with the output terminal, not shown in the drawing of the thermocouple is connected.

According to the improvement underlying the invention, the thermocouple comprises a tubular electrode 15 which concentric on the inner conductor 11 and on the element H. is arranged and is held at a certain distance from this by an insulating piece 16 pushed in between.

The outer conductor 10 is pushed into the end 15a of the tubular electrode 15 from the outside. This end extends into the interior of the outer connection 10 over a length L ¹ which is essentially at least 10% of the total length of the connection.

The connection between the outer conductor 10 and the tubular electrode 15 is made by the release connection 17, which is made on the outside of the electrode.

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The thermocouple according to the invention further comprises the spacer 18 arranged concentrically around the electrode 15.

The end 18a of this intermediate piece 18, the task of which is not only to hold the thermocouple, but also to dissipate the heat quickly and thus to ensure faster cooling of the thermocouple when the flame is extinguished, has an annular recess 19 in which the soldered connection 17 and a short piece 10a of the outer arrester 10 can be accommodated «

According to the main patent, the intermediate piece 18, the corresponds to the part designated in the main patent with 13, have a ribbed outer surface 20 for the purpose of better heat dissipation.

The intermediate piece 18 is tubular on the underlying Electrode 15 with the help of a mechanical locking device from the one in Pig. 2 attached. These The locking device is, for example, a ring 21 attached to the electrode 15, which is provided with a catch 22, which engages in a corresponding incision 23 at the end 18b of the intermediate piece 18.

However, other locking devices can also be provided, such as, for example, a deformation or punch lock and similar known devices. The free end 15b of the tubular electrode is directly connected to a connected to another output terminal of the thermocouple, not shown in the drawing.

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In particular from Fig. 3 it can be seen that the production of the thermocouple is very much simplified. It is first the outer arrester 10 at the end 15a of the tubular Electrode 15 mounted and then the soldered connection 17 made. This solder connection can be in a simple manner and Manufacture with great accuracy because it is an external soldered connection.

During this work, the intermediate piece 18 can be pushed onto the electrode 15 in a simple manner. There the intermediate piece 18 is slidably arranged on the electrode 15, it can after completion of the soldered connection 17 in the in Mg. 1 shown final position can be shifted. The soldered connection 17 disappears in the annular recess 19 and is also protected against the chemical-physical effects of the flame of the burner, which is known in Way acts on the outer solder joint 12.

Patent claims:

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Claims (4)

2222U3 Patent claims li.J Thermocouple for thermoelectric safety devices on gas burners according to patent (cf. Patent application P 17 73 278.4) with an outer and an inner thermoelectric arrester, which are connected to one another by a hot solder joint, with a tubular hollow electrode electrically connected to the outer arrester and arranged concentrically at a distance, and with a tubular hollow electrode arranged concentrically on the tubular electrode hollow intermediate piece for rapid heat dissipation, characterized in that the outer conductor is pushed from the outside onto one end of the tubular electrode, which extends into the interior of the outer conductor over a length of at least 10 fo the total length of the conductor, while the other end is a Forms output terminal and the soldering point between the outer conductor and the tubular electrode is located at the free end of the conductor, and further characterized by the fact that the hollow intermediate piece arranged concentrically on the electrode for rapid heat dissipation with its outer conductor the end facing it forms a receiving point for the soldered connection between the outer conductor and the tubular electrode. 2. Thermocouple according to claim 1, characterized in that the one facing the outer arrester End of the intermediate piece located receiving point for the soldered connection from an annular recess on the inner circumference near the end of the intermediate piece. 209849/0714 3. Thermocouple according to claim 1 and 2, characterized in g-e that the axial length of the annular recess at the end of the intermediate piece so dimensioned is that it also covers a short piece of the external arrester from the outside. 4. Thermocouple according to claims 1 to 3> g e indicates by mechanical devices for holding the intermediate piece to the tubular Electrode. 209849/0714