DE462582C - Arrangement for regulating electrical circuits - Google Patents

Description

Bibliotheek

Bur Ind. Eiqendom

2 9 AUG. 1928

ISSUED ON JULY 13, 1928

REICH PATENT OFFICE

PATENT LETTERING

M 462 582 CLASS 21 c GROUP 66

A 43412 VIII / 21C ^2nd day of the announcement about the grant of the patent: June 21st igs8

Aktiebolaget Birka Regulator in Stockholm Arrangement for regulating electrical circuits

Addendum to patent 457212

Patented in the German Empire on November 4, 1924 The main patent started on September 9, 1923

The present invention relates to an improvement in the regulating device for electrical circuits which is the subject of patent 457,212 and which is essentially characterized in that the power supply of a consumer circuit controlled by a thermostatic switch acting as a self-interrupter whose heating circuit is in turn controlled by a regulating resistor, by means of which the energy supplied to the latter circuit for the purpose of change the relationship between the closing and the interruption period

the thermostat switch can be regulated. An arrangement of this kind provides Appropriate dimensioning and especially when - using a highly sensitive thermostat enclosed in a vacuum - switch represents a practically lossless regulating element. The one shown in the main patent But arrangement has certain practical '

... '· Disadvantages, which essentially consist in the fact that both the thermostat winding and the

as regulating resistor in order to connect it to to enable an ordinary lighting network to be implemented with high resistance, resulting in an increase in manufacturing costs and an increase in the size of the

Thermostats and the regulating resistor has the consequence.

According to the present invention, this is made up of the thermostat switch and the regulating resistor existing regulating unit as a whole in the consumption circuit itself and in series with the consumption resistance switched on. Because the thermostat winding of relatively large currents is flowed through, in this case both the thermostat winding and the regulating resistor executed with very low resistance. This makes it possible to use the parts of the regulating unit in particular Easier and cheaper to manufacture mold, with the parts also having such small dimensions can be carried out so that the regulating member as a whole is in an electrical heating apparatus of the usual type can be attached without significant changes in shape or external dimensions of the apparatus concerned are required.

The invention is intended to be closer to the drawing to be discribed. In the drawing, Fig. 1 shows the connection schematically of the regulating unit to a consumer device. Fig. 2 shows an arrangement at ^ which the rheostat is replaced by a thermostatic switch. Fig. 3 shows a combination of the arrangements according to Fig. ι and 2.

As with the arrangement according to the main patent, the power is supplied to the Consumption apparatus r 'via contact 7 of the thermostat switch. In contrast to the In this case, however, the main Paleiit form

Heating resistor 3 of the thermostat and the rheostat 4 are two branches of the main circuit 17 connected in parallel, with the contact 7 being in the unbranched part of the main circuit. The thermostat switch is arranged in the same way as according to the main patent and thus consists of two contact tongues, 2, one of which (2) consists of a bimetallic rod which is in thermal connection with the heating resistor 3, the latter with one end to the Rod is connected. In order to increase the sensitivity of the thermostat as far as possible and thereby to be able to fully utilize the advantages offered by the invention, the thermostat switch is expediently in an evacuated one. Glass container 10 included.

If the main circuit 17 is short-circuited Rheostat 4 is closed, the consumption resistance 5 is apparently uninterrupted Current through contact 7. But now there is so much resistance in the rheostat 4 is switched on that the heating resistor 3 receives enough current to make the contact 7 interrupt, the thermostat will work as a self-interrupter and through its repeated interruptions the supply of energy to the consuming apparatus 5 to reduce. If you now lead the crank 9 of the Rhcostat further to the left and thereby increases the rheostat resistance, that part of the consumption current also increases which flows through the heating resistor 3, whereby the interrupter frequency and thus also the ratio between the Interruption period and the closing period is increased, which in turn leads to The result is that the energy supply to the consuming device is reduced.

As can be seen from the above, the described regulating device is .insofern the usual arrangement of a directly switched on in a consumer circuit Regulating resistance analog, as the regulating unit according to the invention, as Considered as a whole, also in the consumer circuit is switched on in series with the consumption resistance. The main difference, however, is that the regulation of the consumption circuit by periodic interruption and Closure of the same by means of a thermostat acting as a self-breaker Switch takes place, whereby the energy used for regulation becomes a vanishing Fraction of the otherwise required amount is reduced.

As highlighted above, the nomination also offers in relation to the main patent

the advantage that the consumption circuit by means of a in relation to the consumption resistance infinitely small resistance can be regulated, the latter can be produced in a cheap and manageable form. It is evident that the rheostat resistance 4 in this case not necessarily executed in the form of a winding zr but in many cases it can consist of a resistance rod. Further the heating resistor 3 may possibly consist of a sheet metal strip, which from the bimetallic rod 2 through a thin mica sheet o. is isolated.

If the load resistance 5 becomes unchanged with the setting of the rheostat crank 9 reduced, the regulating unit has in the present case in contrast to the behavior in known arrangements including the arrangement according to the main patent the effect of preventing an increase in the supply of energy to the consuming apparatus will. This behavior is based on the fact that the increase in the current strength on your part causes an increase in the interruption frequency and the ratio between the interruption period and the closing period. The regulating unit works so at the same time, as it were, as protection against overheating.

The invention is more directly used as protection against overheating if the Rheostat 4 as an automatically adjustable under the influence of temperature fluctuations Resistance is arranged, e.g. 1 |. such that the rheostat crank 9 through mediation a suitable transmission gear with a temperature fluctuations of the consumable apparatus 5 deformable organ. is mechanically connected.

A special form of use of this type is shown in Fig. 2, where the rheostat is replaced by a thermostatic relay which is thermally connected to the consumer apparatus in a manner known per se and which consists of a bi-metallic rod 18 which, under the action of. Heat is ge1x) generated and by means of a driver device 19 the one of. two contact tongues 20 actuated. The contact tongues 20 normally form a closed contact, which den.Heizverbindungen-3. shorts. When bending of the rod 18 of this contact is broken, wherein the heating resistor _# 3 is turned on and the thermostat switch is set as Strombegrenzcr in activity.

Fig. 3 shows a combination of the arrangement according to Fig. 1 and 2, the rheostat 4 and the relay 18, 20 among themselves

X) PY

ν are connected in series and together form a shunt to the heating resistor 3. - .. In this case, the rheostat 4 can next to; other than the originally intended purpose ^; 5 to be used to provide a con- "" ί stant temperature of the apparatus 5 or: ■ medium whose temperature is affected by the \ apparatus exactly einzuregulieren. For this purpose, the energy supply is regulated by means of the rheostat in such a way that the thermostat 18 is just able to cause the interruption of the contact 20, the interruption frequency becoming low and only weak temperature fluctuations occurring.

Claims (4)

Claim: i. Arrangement for regulating circuits according to patent 457212, characterized in, that the heating resistor (3) of the thermostat switch and the control resistor (4) are connected in parallel with each other Form branches of the consumption circuit. , 2. Arrangement according to claim i, characterized in that the control unit composed of the thermostat switch and the control resistor is switched ^{on as a whole in the consumption * circuit and in series with the \ T errauchswiderstand.}
- 3. Arrangement according to claim 1 and 2, characterized in that the regulating resistor (4) automatically, namely "regulated under the influence of the heat generation of the consumption resistor (5) will. 4. Arrangement according to claim 1 to 3, characterized in that the regulating resistor is replaced by a thermostatically operated break contact. For this purpose ι sheet of drawings