DE164792C - - Google Patents
Info
- Publication number
- DE164792C DE164792C DENDAT164792D DE164792DA DE164792C DE 164792 C DE164792 C DE 164792C DE NDAT164792 D DENDAT164792 D DE NDAT164792D DE 164792D A DE164792D A DE 164792DA DE 164792 C DE164792 C DE 164792C
- Authority
- DE
- Germany
- Prior art keywords
- shunt
- contacts
- switches
- switch
- resistor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000001105 regulatory effect Effects 0.000 claims 1
- 238000005259 measurement Methods 0.000 description 7
- 238000002955 isolation Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/20—Modifications of basic electric elements for use in electric measuring instruments; Structural combinations of such elements with such instruments
- G01R1/203—Resistors used for electric measuring, e.g. decade resistors standards, resistors for comparators, series resistors, shunts
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Description
PATENTAMTPATENT OFFICE
JVl 164792 KLASSE 21 e. JVl 164792 CLASS 21 e.
G el öG el ö
Bei Galvanometermessungen ist es bekanntlich üblich, um dasselbe Instrument für verschiedene Meßbereiche benutzen zu können, in einen Nebenschluß zum Instrumente einen veränderlichen Widerstand oder einen festen Widerstand mit veränderlichen Abzweigungspunkten zu legen. Will man nun nacheinander Messungen ausführen, die ein Arbeiten mit verschiedener Größe des Nebenschluß-Widerstandes erfordern, so ist vor jeder Messung der Widerstand entsprechend einzustellen. Es kann nun vorkommen, daß schnell nacheinander Messungen vorzunehmen sind, bei denen die zu wählenden Werte des Nebenschlußwiderstandes vorher bekannt sind. Ein derartiger Fall tritt z. B. ein,-wenn Isolation und Kapazität eines Kabels zu messen sind, und wenn ■ es sich z. B. um die Prüfung von vieladrigen Kabeln handelt, so sind für jede Ader jene beiden Messungen', er- - forderlich, die sich also in regelmäßiger Abwechselung wiederholen, bis das Kabel durchgeprüft ist. Eine jedesmalige Neueinstellung des Nebenschlußwiderstandes ist aber unbequem, da sie Aufmerksamkeit erfordertIn galvanometer measurements, it is well known to use the same instrument for different To be able to use measuring ranges in a shunt to the instruments a variable resistance or a fixed one To lay resistance with variable branch points. One now wants one after the other Carry out measurements that work with different sizes of shunt resistance the resistance must be set accordingly before each measurement. It can now happen that measurements are to be carried out in quick succession in which the values of the Shunt resistance are known beforehand. Such a case occurs e.g. B. a, -if isolation and capacitance of a cable are to be measured, and if ■ it is e.g. B. the exam If we are dealing with multi-core cables, those two measurements', he - Required, which are therefore repeated in regular alternation until the cable has been checked is. It is inconvenient to reset the shunt resistor every time, as it requires attention
auch Ein-also a-
und deshalb ermüdet, wobei natürlich
das Vorkommen von Fehlern in der
stellung nicht selten ist.and therefore tired, being of course
the occurrence of errors in the
position is not uncommon.
Die vorliegende Erfindung bezweckt nun, die jedesmalige richtige Einstellung des Nebenschlußwiderstandes von der fortgesetzten Aufmerksamkeit des Beobachters unabhängig zu machen und ihm so seine Arbeit wesentlich zu erleichtern. Der Beobachter braucht nur zu Beginn der Messungen entsprechende Einstellungen vorzunehmen, während im übrigen seine Tätigkeit auf eine rein mechanische Umschaltung vor jeder Messung beschränkt wird. Zu diesem Zwecke wird der Nebenschlußwiderstand mit einer entsprechenden Anzahl von verstellbaren Abzweigkontakten versehen, durch deren Einstellung sich die gewünschten Größen ,der Nebenschlußwiderstände herstellen lassen. Die Abzweigkontakte sind mit einem Umschalter verbunden, durch welchen jeder von ihnen mit der Stromzuleitung zum Galvanometer verbunden werden kann.The present invention now aims to ensure the correct setting of the each time Shunt resistance independent of the observer's continued attention to make his work much easier. The observer needs make the appropriate settings only at the beginning of the measurements, while in the rest of his activity is limited to a purely mechanical switchover before each measurement will. For this purpose, the shunt resistor is equipped with a corresponding number of adjustable branch contacts provided, through the setting of which the desired sizes, the shunt resistances can be produced. The branch contacts are connected to a changeover switch, through which each of them with the power supply line to the galvanometer can be connected.
Fig. ι der beiliegenden Zeichnung stellt schematisch eine Widerstandsanordnung gemaß vorliegender Erfindung dar. An die Klemmen α und b ist das Galvanometer angeschlossen. Von den Stromzuführungsleitungen L1 und L2 führt die eine an die Klemme c und von da nach a, die andere an den Hebel d des Umschalters U. Zwischen den Klemmen b und c liegt der Widerstand W, an welchem die Kontakte f und g verstellbar sind, /und g sind durch die Leitungen L3 bezw. L4 mit den Kontakten h und i des Umschalters verbunden. Durch den Hebel d kann nun entweder der zwischen c und f oder der zwischen c und g liegende Teil des Widerstandes W zwischen die Leitungen L1 und L2 geschaltet werden. .Fig. Ι of the accompanying drawings shows schematically a resistor arrangement according to the present invention. The galvanometer is connected to the terminals α and b. One of the power supply lines L 1 and L 2 leads to terminal c and from there to a, the other to the lever d of the switch U. Between the terminals b and c is the resistor W, on which the contacts f and g are adjustable are, / and g are respectively through the lines L 3. L 4 connected to contacts h and i of the switch. By means of the lever d , either the part of the resistor W between c and f or the part of the resistor W lying between c and g can be switched between the lines L 1 and L 2. .
Fig. 2 und 3 zeigen zwei praktische Ausführungsformen der Widerstandsschaltung nach Fig. 1. Bei der erstgenannten Anordnung ist der Widerstand W in entsprechende Sektionen geteilt, welche durch die Kontaktstücke k miteinander verbunden sind. Die Kontaktstücke k können durch Stöpsel mit2 and 3 show two practical embodiments of the resistance circuit according to FIG. 1. In the first-mentioned arrangement, the resistor W is divided into corresponding sections which are connected to one another by the contact pieces k. The contact pieces k can with plugs
Claims (1)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE164792C true DE164792C (en) |
Family
ID=430352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT164792D Active DE164792C (en) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE164792C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2478966A (en) * | 1948-03-29 | 1949-08-16 | Weston Electrical Instr Corp | Dual purpose voltmeter range attenuator |
| US3517383A (en) * | 1967-03-20 | 1970-06-23 | Kenneth Edward Hughes | Turn signal monitor |
-
0
- DE DENDAT164792D patent/DE164792C/de active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2478966A (en) * | 1948-03-29 | 1949-08-16 | Weston Electrical Instr Corp | Dual purpose voltmeter range attenuator |
| US3517383A (en) * | 1967-03-20 | 1970-06-23 | Kenneth Edward Hughes | Turn signal monitor |
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