DE1902249U - SCANNING DEVICE FOR ELECTRIC LIGHT SCANNING OF A MARKED RUNNER DISC OF A CALIBRATION METER FOR CHECKING AND CALIBRATING ELECTRICITY METERS. - Google Patents

SCANNING DEVICE FOR ELECTRIC LIGHT SCANNING OF A MARKED RUNNER DISC OF A CALIBRATION METER FOR CHECKING AND CALIBRATING ELECTRICITY METERS.

Info

Publication number
DE1902249U
DE1902249U DES42942U DES0042942U DE1902249U DE 1902249 U DE1902249 U DE 1902249U DE S42942 U DES42942 U DE S42942U DE S0042942 U DES0042942 U DE S0042942U DE 1902249 U DE1902249 U DE 1902249U
Authority
DE
Germany
Prior art keywords
marking
light
scanning device
scanning
meter
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.)
Expired
Application number
DES42942U
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to DES42942U priority Critical patent/DE1902249U/en
Publication of DE1902249U publication Critical patent/DE1902249U/en
Expired legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/347—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells using displacement encoding scales
    • G01D5/3473—Circular or rotary encoders
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/244—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
    • G01D5/245—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains using a variable number of pulses in a train
    • G01D5/2454—Encoders incorporating incremental and absolute signals
    • G01D5/2455—Encoders incorporating incremental and absolute signals with incremental and absolute tracks on the same encoder
    • G01D5/2457—Incremental encoders having reference marks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/347—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells using displacement encoding scales
    • G01D5/34707—Scales; Discs, e.g. fixation, fabrication, compensation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/347—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells using displacement encoding scales
    • G01D5/34707—Scales; Discs, e.g. fixation, fabrication, compensation
    • G01D5/34715—Scale reading or illumination devices

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Transform (AREA)

Description

1A.S33732*29. IM 1A.S33732 * 29. IN THE

SIEMENS-SOHUCKEITTOEKE Erlangen, den 27.7.1964SIEMENS-SOHUCUNGENTOEKE Erlangen, July 27, 1964

Aktlengesellschaft Werner-von-Siemens-Str. 50Aktlengesellschaft Werner-von-Siemens-Str. 50

PIA 62/1767PIA 62/1767

Abtasteinrichtung zur lichtelektrischen Abtastung einer mit einer Markierung versehenen Lauferscheine eines Eichzählers zum Prüfen und Eichen von Elektrizitätszählern Scanning device for photoelectric Scanning of a running slip of a calibration meter provided with a marking for checking and calibrating electricity meters

Die lichtelektrische Abtastung von Zählerscheiben elektrischer Eichzähler ist bekannt. Hierbei wird auf den Rand der Zählerscheiben ein Lichtstrahl geworfen, der dort reflektiert wird. Der reflektierte Lichtstrahl fällt auf ein lichtempfindliches elektrisches Bauelement. Die Reflexion ist verschieden, wenn der Lichtstrahl z.B. in schräger Richtung auf eine Verzahnung fällt. Infolge dieser Verschiedenheit werden am lichtempfindlichen Element bei Durchgang jeden Zahnes Reaktionen ausgelöst, die zur Erzeugung elektrischer Impulse nutzbar gemacht werden können.The photoelectric scanning of counter disks of electrical calibration meters is known. This is done on the edge of the counter discs a ray of light thrown, which is reflected there. The reflected light beam falls on a light-sensitive one electrical component. The reflection is different if, for example, the light beam hits a toothing in an oblique direction falls. As a result of this difference, the most light-sensitive Element triggers reactions when passing through each tooth, which can be used to generate electrical impulses be able.

Da bei den bekannten Einrichtungen durch jeden einzelnen Zahn ein Impuls ausgelöst wird, gehen naturgemäß die Teilungsfehler der Markierung in die Impulsdauer ein. Dies kann zur IPolge haben, daß ein mit den erzeugten Impulsen betriebener Synchronmotor unruhig läuft.Since a pulse is triggered by each individual tooth in the known devices, the pitch errors naturally go away mark in the pulse duration. This can have the consequence that a device operated with the generated pulses Synchronous motor runs unevenly.

- 1 - Hee/Br- 1 - Hee / Br

PIA 62/1767 GinPIA 62/1767 Gin

Der feuerung liegt die Aufgabe zugrunde, eine Abtasteinrichtung zu schaffen, bei der Teilungsfehler einer Markierung keinen Einfluß auf die Impulsdauer haben.The firing is based on the task of a scanning device to create no division errors in a marking Have an influence on the pulse duration.

Diese Aufgabe wird bei einer Abtasteinrichtung zur lichtelektrischen Abtastung einer mit einer gleichmäßigen Markierung versehenen läuferscheibe eines Eichzählers zum Prüfen und Eichen von Elektrizitätszählern, gemäß der !Teuerung daduidi gelöst, daß mehrere Marken gleichzeitig auf den lichtempfindlichen Empfänger projiziert werden, und daß im Projektionsweg eine der Gebermarkierung entsprechende Schablone oder dergleichen angeordnet ist. Infolge der gleichzeitigen Abtastung mehrerer Marken verschwinden die einzelnen Teilungsfehler, da stets ein Durchschnitt über zehn Markierungen genommen wird.In the case of a scanning device, this task becomes photoelectric Scanning of a carrier disk of a calibration meter provided with a uniform marking for testing and calibration of electricity meters, according to the price increase daduidi that several marks are projected simultaneously onto the light-sensitive receiver, and that one of the encoder marks is in the projection path corresponding template or the like is arranged. Disappear as a result of the simultaneous scanning of several marks the individual division errors, as there is always an average over ten marks is taken.

In der Zeichnung ist ein Ausführungsbeispiel der Neuerung dargestellt. Die Darstellung ist schematisch. Insbesondere ist das Größenverhältnis zwischen den einzelnen Heilen nicht den normalen Verhältnissen entsprechend. Meist ist die Verzahnung des Gebers feiner gestuft und die Fotozelle im Vergleich zur Läuferscheibe sehr viel kleiner als in der Zeichnung.In the drawing, an embodiment of the innovation is shown. The representation is schematic. In particular, the proportions between the individual cures are not normal According to the circumstances. Usually the gearing of the encoder is more finely graduated and the photocell compared to the carrier disc much smaller than in the drawing.

Am Eand der Zählerscheibe 1 eines nicht dargestellten Elektrizitätszählers befindet sich eine Markierung in Form einer Verzahnung, die aus den Zähnen 2 und den Zahnlücken 3 besteht. Die Verzahnung ist nur auf einem Seil des Scheibenumfanges dargestellt, erstreckt sich jedoch über den ganzen Umfang. UnterhalbAt the end of the meter disc 1 of an electricity meter, not shown there is a marking in the form of a toothing, which consists of the teeth 2 and the tooth gaps 3. the Toothing is only shown on one rope of the pulley circumference, however, extends over the entire perimeter. Below

- 2 - Hee/Br- 2 - Hee / Br

PLA 62/1767 GmPLA 62/1767 Gm

der Verzahnung 3 "befindet sich eine Schablone 4 und unter der Schablone 4 ein Fotoelement 5* Die Schablone 4 enthält Durchbräche 6, die den Zahnlücken 3 entsprechen« Am Fotoelement 5 befindet sich eine lichtempfindliche Fläche 75 die -verhältnismäßig groß ist, so daß mehrere Markierungen gleichzeitig auf diese Fläche projiziert werden können. Die Fläche ist mindestens so groß, daß sie sämtliche Projektionen der in der Schablone 4 vorgesehenen Durchbrüche 6 erfassen kann. Am Fotoelement 5 sind noch die Ausgänge 8 und 9 vorhanden, an die ein nicht dargestellter Verstärker angeschlossen sein kann.the toothing 3 "is a template 4 and under the template 4 a photo element 5 * The template 4 contains openings 6, which correspond to the tooth gaps 3« On the photo element 5 is a light-sensitive surface 7 5 which is relatively large, so that several The area is at least large enough that it can capture all projections of the openings 6 provided in the template 4. The photo element 5 also has the outputs 8 and 9 to which an amplifier (not shown) is connected can be.

Oberhalb der Verzahnung 2, 3 befindet sich eine Lichtquelle 10, von der divergentes Licht (angedeutet durch die Lichtstrahlen 11) ausgeht. Das von der Lichtquelle 10 ausgehende Licht fällt in eine Sammellinse 12, in der es parallelgerichtet wird. Zwei parallele Lichtstrahlen sind mit 13 bezeichnet. Das von der Linse 12 ausgehende Lichtbündel überdeckt mehrere Markierungen, z.B. zehn Zahnlücken. Der beleuchtete Kreis ist bei 14 strichpunktiert angedeutet.Above the toothing 2, 3 there is a light source 10, from which divergent light (indicated by the light rays 11) emanates. The light emanating from the light source 10 falls into a converging lens 12 in which it is collimated. Two parallel light beams are denoted by 13. That of the Lens 12 outgoing light bundles covers several markings, e.g. ten tooth gaps. The illuminated circle is indicated by dash-dotted lines at 14.

Die Vorrichtung arbeitet wie folgt: Das von der Lichtquelle 10 ausgehende Licht fällt auf den Rand der rotierenden Scheibe 1. Das Licht kann durch die Zahnlücken 3 hindurchtreten und falls die Zahnlücken 3 senkrecht über den Durchbrüchen 6 stehen,The device works as follows: The light emanating from the light source 10 falls on the edge of the rotating disk 1. The light can pass through the tooth gaps 3 and if the tooth gaps 3 are perpendicular to the openings 6,

durch die Durchbrüche 6 hindurch auf die lichtempfindliche Fläche 7 auftreffen. Die auf die lichtempfindliche Fläche 7through the openings 6 through to the photosensitive Face 7. The light-sensitive surface 7

- 3 - Hee/Br- 3 - Hee / Br

PLA 62/1767 GmPLA 62/1767 Gm

geworfenen Lichtflecke sind bei 15 gestrichelt angedeutet. Bei der Weiterbewegung der Scheibe 1 kommen die Zahnlücken 3 in senkrechter Richtung gesehen zwischen die Durchbrüche 6 zu liegen. Es fällt also immer weniger Licht auf die lichtempfindliche fläche 7. Bei gleicher Breite der Zähne 2 und der Zahnlücken kommt schließlich der Zustand, daß überhaupt kein Licht mehr durch die Durchbrüche 6 hindurchtreten kann. Es ist dann die dunkelste Stelle erreicht. Bei weiterer Bewegung der Scheibe kommen "die Zahnlücken 3 wieder über die Durchbrüche 6. Die lichtempfindliche Fläche 7 wird wieder beleuchtet, bis ein Maximum der Beleuchtung erreicht ist und die Beleuchtung dann wieder abnimmt. Infolge der gleichzeitigen Projektion von vielen Markierungen können sich die Teilungsfehler nicht mehr auf die Impulsdauer auswirken, da im statistischen Mittel über zehn Markierungen, dieser Teilungsfehler nicht mehr spürbar ist.Thrown light spots are indicated by dashed lines at 15. at the further movement of the disk 1, the tooth gaps 3 come in to lie seen between the openings 6 in the vertical direction. So less and less light falls on the light-sensitive surface 7. With the same width of teeth 2 and the tooth gaps Finally, the state comes in that no more light can pass through the openings 6 at all. It is then that darkest point reached. With further movement of the disk, the tooth gaps 3 come back over the openings 6. The light-sensitive Area 7 is illuminated again until a maximum of the illumination is reached and the illumination then again decreases. As a result of the simultaneous projection of many marks the division errors can no longer affect the Impact duration of the pulse, since on a statistical average over ten marks, this division error is no longer noticeable.

Obwohl die Neuerung am Beispiel einer sich drehenden Zählerscheibe 1 beschrieben wurde, -ist sie auch für andere Anordnungen brauchbar. So könnte z.B. der Geber ein translatorisch bewegter Papierstreifen mit entsprechender Lochung sein. Die Markierung braucht auch nicht aus Durchbrüchen zu bestehen, sondern kann z.B. auf den Geber, also ein Papierband, oder auf eine Läuferscheibe aufgedruckt sein. In diesem Falle würde das auf die Markierung auftreffende Licht reflektiert und dann über eine Schablone entsprechend der Schablone 4 auf die Fotozelle geworfen werden.Although the innovation on the example of a rotating counter disc 1, it can also be used for other arrangements. For example, the encoder could be a translationally moved paper strip with a corresponding perforation. The mark does not need to consist of breakthroughs, but can, for example, on the encoder, i.e. a paper tape, or on a carrier disc be printed. In this case, the light hitting the marking would be reflected and then via a Template can be thrown onto the photocell according to template 4.

3 Schutzansprüche, 1 Figur3 protection claims, 1 figure

- 4 - Hee/B]- 4 - Hee / B]

Claims (3)

ms mm K1. /Π «fg. t*~$ fe ms mm K 1 . / Π «fg. t * ~ $ fe CKERTWERKE KH. Θέϋ. 3-S-.J- J. νCKERTWERKE KH. Θέϋ. 3-S-.J-J. ν Akiz. S 42 942/42dAkiz. S 42 942 / 42d SIEMENS Jp m E. "7~ Π «j /J 4 ■#· — -ί βίιSIEMENS Jp m E. "7 ~ Π« j / J 4 ■ # · - -ί βίι siEMENS-scHUCKERTWERKE r*"· w ^ Ul '■*' 1^ J· '"plaö;T62/1767SIEMENS-SCHUCKERTWERKE r * "· w ^ Ul '■ *' 1 ^ J · '" pla ö; T 62/1767 AKTIENGES ELLS CHAFTAKTIENGES ELLS CHAFT Heuer Schutzanspruch 1This year's protection claim 1 Abtasteinrichtung zur liehtelektrisehen Abtastung einer mit einer gleichmäßigen Markierung versehenen Läuferscheibe eines Eichzählers zum Prüfen und Eichen τοη Elektrizitätszählern, dadurch gekennzeichnet, daß im Projektionsweg zwischen Lichtquelle (10) und lichtempfindlichen Empfänger (5) eine der G-ebermarkierung (2, 3) entsprechende Schablone oder dergleichen (5, 6) angeordnet ist.Scanning device for borrowed electrical scanning of a Carrier disc provided with a uniform marking a calibration meter for testing and calibration τοη electricity meters, characterized in that in the projection path between the light source (10) and the light-sensitive receiver (5) a template corresponding to the encoder marking (2, 3) or the like (5, 6) is arranged. Hee/Br 1.9.64Hee / Br 1.9.64 RA. 533 739-29.7.64RA. 533 739-29.7.64 PLA 62/1767 GmPLA 62/1767 Gm SchutzansprücheProtection claims Attas teinri chtung zur lichtelektrischen ATd tasj^ilg1 einer mit einer gleichmäßigen Markierung verseilen en Lauf erscheine eines Eiehzählers zum Prüfen und JSdTchen von Elektrizitätszählern, dadurch gekennzeichnet, daß mehrere Marken (2, 3) gleichzeitig auf den lipntempfindlichen Empfänger (5) projiziert werden,;&nd daß im Projektionsweg eine der G-eber markierung (2, 2f) entsprechende Schablone oder dergleichen (5) 6) angeordnet ist.Attention to the photo-electric ATd tasj ^ ilg 1 a run stranded with a uniform marking appears of a drawing meter for checking and JSdTchen of electricity meters, characterized in that several marks (2, 3) are projected simultaneously onto the lipnt-sensitive receiver (5), and that a template or the like (5) 6) corresponding to the G-eber marking (2, 2f) is arranged in the projection path. 2. Abtasteinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Markierung am Rand einer Zählerscheiloe (1) oder dergleichen als Zahnung (2, 3) ausgebildet ist Lind die Schablone (4) der Zahnlücken (3) entsprechende Durchbrüche (6) besitzt.2. Scanning device according to claim 1, characterized in that that the marking on the edge of a meter Scheiloe (1) or the like designed as a toothing (2, 3) and the template (4) the tooth gaps (3) has corresponding openings (6). 3. Abtasteinrichtung nach Anspruch 1 und 2, dadurch gekennzeichnet, daß das lichtempfindliche elektrische Bauelement (5) ein fotoelement ist.3. Scanning device according to claim 1 and 2, characterized in that that the light-sensitive electrical component (5) a photo element is. - 5 - Hee/Bn- 5 - Hee / Bn
DES42942U 1962-10-11 1962-10-11 SCANNING DEVICE FOR ELECTRIC LIGHT SCANNING OF A MARKED RUNNER DISC OF A CALIBRATION METER FOR CHECKING AND CALIBRATING ELECTRICITY METERS. Expired DE1902249U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES42942U DE1902249U (en) 1962-10-11 1962-10-11 SCANNING DEVICE FOR ELECTRIC LIGHT SCANNING OF A MARKED RUNNER DISC OF A CALIBRATION METER FOR CHECKING AND CALIBRATING ELECTRICITY METERS.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES42942U DE1902249U (en) 1962-10-11 1962-10-11 SCANNING DEVICE FOR ELECTRIC LIGHT SCANNING OF A MARKED RUNNER DISC OF A CALIBRATION METER FOR CHECKING AND CALIBRATING ELECTRICITY METERS.

Publications (1)

Publication Number Publication Date
DE1902249U true DE1902249U (en) 1964-10-15

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DES42942U Expired DE1902249U (en) 1962-10-11 1962-10-11 SCANNING DEVICE FOR ELECTRIC LIGHT SCANNING OF A MARKED RUNNER DISC OF A CALIBRATION METER FOR CHECKING AND CALIBRATING ELECTRICITY METERS.

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3841665A1 (en) * 1988-12-10 1990-07-26 Fresenius Ag Circuit for monitoring the function of a light barrier

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3841665A1 (en) * 1988-12-10 1990-07-26 Fresenius Ag Circuit for monitoring the function of a light barrier

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