DE1721320U - TELEGRAPH RELAY FOR THE ZERO DISPLAY IN THE INDICATOR CIRCUIT OF ELECTRIC BRIDGE CIRCUITS OD. DGL. - Google Patents

Description

Aktiengesellschaft ,. Berlin and Munich.

Γ / I Telegraph relay for the NuIl

_rj I * show in the indicator circle of electrical

Bridge circuits or the like 7.9.55.

S 18003. (T. 3; line 1)

May 3, 1356

Siemens & Haiske Munich 2, the " '· ^o6 P' · i3bb.

Aktiengesellschaft Y / ittelsbacherplatz 4

Berlin and Munich <

AZ

Telegraph relay for the zero display in the indicator circuit of electrical bridge circuits or the like «

In self-balancing electrical bridge circuits, e.g. at Fernrneßanlagen are for the pen display in the indicator branch, the bridge requires relays with a very high response sensitivity ο The greater the responsiveness, the more accurate the relevant measurement can be carried out. The most sensitive relay known at the moment is the moving coil relay, but it is one has a relatively long response time (approx. 0.4 seconds). Yfird If such a relay is used, the measurement accuracy is sufficient for practical cases, but the time constant becomes too large for the arrangement. The known polarized relays, which are used for telegraphy purposes, have the shortest response time used (T-relay) <. "The response power of the T-relay However, it is several orders of magnitude higher than that of the-.

-CA //

Gra / Rpr, 18.8o55. - 2 -

21 », 4/01. ί 7? * 320, Siesitss -5. Neck c Aktiengesellschaft, Berlin and Munich. S Tdegraph Rais for the zero display in the indicator circuit of electrical bridge circuits or the like 7. 9. 55. S 18003. (T. 3; line 1)

3 MAY 135§

PA 9/510/830

sensitive moving coil relay. Normal amplifiers can do not use because of the excessive effort, υπ the power delivered by the indicator circuit of the bridge "

According to the innovation, a transistor amplifier is preferred an amplifier with two transistors in a bridge circuit enclosed by the protective cover of the relay. ■ ■

The new arrangement has the advantage that with the same space requirement ^ the response sensitivity of the moving coil relay can be achieved, but the cheaper and structurally more robust T-relay ■ can be used with a very short response time »

In the drawing, Pig * 1 represents a T-relay with a protective cover _y on the inner wall of which the transistor amplifier is attached.

2 shows the bridge circuit of the amplifier.

According to Pig-1, the protective hood is drawn in section and that T-relay provided with the reference character R? while the structure Tr represents the transistor amplifier. According to the circuit example the P.g. 2, the transistors 1 and 2 are known per se Way together with ohmic resistors into a gap switched. As a result of the bridge circuit, the temperature dependence the transistors and the fluctuations in the battery voltage are compensated. In the output of the transistors are the Windings A and B of the T-relay, the contacts of which are labeled 3. The operating voltage is fed to terminals 4. The terminals E are to be connected to the indicator circuit of the bridge.

3 claims for protection 1 El »drawings

Claims (1)

Protection claims 1 »T-Relay: for the zero display in the Indicatorzv / eig of electrical Bridge circuits or the like., Characterized in that a transistor amplifier, preferably an amplifier with two transistors in a bridge circuit, from the protective cover of the relay is enclosed. T-relay according to claim 1, characterized in that the The transistor amplifier is attached to the inner wall of the protective cover »■." ■■: ', \ V ..,.,. ■'.:.? ·.; ■ T-relay according to claim 1 and 2, characterized; that ■ each transistor of the bridge circuit is a partial winding of the Relay feeds »