DE338206C - Mirror device for reading measuring instruments - Google Patents

Mirror device for reading measuring instruments

Info

Publication number
DE338206C
DE338206C DE1920338206D DE338206DD DE338206C DE 338206 C DE338206 C DE 338206C DE 1920338206 D DE1920338206 D DE 1920338206D DE 338206D D DE338206D D DE 338206DD DE 338206 C DE338206 C DE 338206C
Authority
DE
Germany
Prior art keywords
mirror
measuring instruments
mirror device
mirrors
instrument
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
DE1920338206D
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.)
ABB Training Center GmbH and Co KG
Original Assignee
Hartmann and Braun 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 Hartmann and Braun AG filed Critical Hartmann and Braun AG
Application granted granted Critical
Publication of DE338206C publication Critical patent/DE338206C/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING 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
    • G01D7/00Indicating measured values
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G01L19/08Means for indicating or recording, e.g. for remote indication

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Description

Spiegeleinrichtung zum Ablesen von Meßinstrumenten. Es gibt Meßinstrumente, bei welchen der bewegliche Teil zur Bestimmung des Meßwertes in eine ganz bestimmte Lage gebracht werden muß. Als Beispiele seien genannt: die sogenannten Nullinstrumente, die Torsionsinstrurnente und die Thornsonsche Spannungsstrornwaage. Besonders bei den beiden letzteren Instrumentgattungen handelt es sich nicht nur darum, »Gleichge%vicht« einzustellen, sondern dabei auch eine ganz bestimmte Lage der beweglichen zu den festen Teilen des Meßinstrumentes einzuhalten. Ist am beweg' lichen Teil ein Spiegel befestigt, so kann man in bekannter Weise mit Spiegel und Skala eine z. B. bei den Meßgrößen Null notierte Lage bei Meßgrößen von bestimmtem Betrage wieder einstellen. Dabei hat man jedoch keine Kontrolle, ob diese beobachtete Lage des beweglichen Teiles auch bezüglich seiner Lage zum festen Teil des Meßinstrumentes richtig ist. Hierzu ist eine Untersuchung des Meßinstrumentes und seine Öffnung notwendig. jede Ortsveränderung von Meßinstrument, Fernrohr oder Ableseskala macht diese Untersuchung aufs neue notwendig.Mirror device for reading measuring instruments. There are measuring instruments in which the moving part to determine the measured value in a very specific Must be brought. Examples are: the so-called zero instruments, the torsion instrument and the Thornson tension current balance. Especially at the latter two types of instruments are not just about "equal weight" set, but also a very specific position of the movable to the fixed parts of the measuring instrument. There is a mirror on the moving part attached, so you can in a known manner with a mirror and scale a z. B. at the Measured variables reset the position noted to zero for measured variables of a certain amount. In doing so, however, one has no control as to whether this observed position of the movable Part is also correct with regard to its position in relation to the fixed part of the measuring instrument. This requires an examination of the measuring instrument and its opening. every Moving the measuring instrument, telescope or reading scale makes this investigation necessary again.

Die Erfindung ist in der Zeichnung schetnatisch dargestellt. Der Rahmen i mit dem Spiegel:2 repräsentiert den festen, die Achse 3 mit dem Spiegel 4 den beweglichen Teil des Meßinstrumentes. Bei der Justierung des Apparates werden in- der richtigen Lage von 3 die Spiegel 2, und 4 genau parallel gestellt. Betrachtet man durch ein Fernrohr 5 über beide Spiegel:2 und 4 eine Strichmarke 6, so kann diese Marke nur als eine gerade Linie erscheinen, wenn die beiden Spiegel parallel stehen, d. h. der bewegliche Teil 3, die bei der Justierung einmal bestimmte Lage zum festen Teil i einnimmt.The invention is shown schematically in the drawing. The frame i with the mirror: 2 represents the fixed, the axis 3 with the mirror 4 the movable part of the measuring instrument. When adjusting the apparatus, mirrors 2 and 4 are placed exactly parallel in the correct position of 3. Looking through a telescope 5 over both mirrors: 2 and 4 a line mark 6, this mark can only appear as a straight line if the two mirrors are parallel, i.e. H. the movable part 3, which once assumes a certain position relative to the fixed part i during the adjustment.

Hat das Instrument eine Indexkorrektion, so stellt man die richtige Lage zwischen i und 3 her, indem man durch das Fernrohr die Marke betrachtet und die Indexkorrektion so lange betätigt, bis eine reine scharfe gerade Linie sichtbar ist. Gleichgewicht an 3 zwischen den Meßgrößen wird durch deren Betätigung in derselben Weise hergestellt.If the instrument has an index correction, the correct position between i and 3 is established by looking at the mark through the telescope and pressing the index correction until a pure, sharp straight line is visible. Equilibrium at 3 between the measured quantities is established by actuating them in the same way.

Man kann in der beschriebenen Weise nicht nur die Lage von einem, sondern mit mehreren Spiegeln die Lage von mehreren beweglichen und festen Instrumentteilen beobachten.In the way described, one can not only determine the position of one, but with several mirrors the position of several movable and fixed instrument parts watch.

Bei nicht ortsfesten oder schwer zugänglichen Instrumenten ist die beschriebene Einrichtung von großem Vorteil, da eine ständige Kontrolle der Lage des beweglichen zur Lage des festen Instrumentteiles möglich ist. Schon bei sehr geringer Abweichung erscheint die im Doppelspiegel beobachtete Strichmarke nicht als gerade, sondern als gebrochene Linie. Dieser Umstand ermöglicht eine außerordentlich genaue Einstellung der richtigen Lage.For instruments that are not stationary or that are difficult to access, the The facility described is of great advantage, as constant monitoring of the situation the movable to the position of the fixed instrument part is possible. Already at very slight deviation, the line mark observed in the double mirror does not appear as a straight line rather than a broken line. This circumstance enables an extraordinary accurate setting of the right location.

Claims (1)

PATENT-ANSPRUCH: Spiegeleinrichtung zum Ablesen von Meßinstrumenten, dadurch gekennzeichtiet, daß nahe dern Spiegel des beweglichen Teiles ein zweiter Spiegel arn festen Teil des Meßinstrunientes so befestigt ist, daß für eine bestimmte Lage dieser Instr-umentteile zueinander beide Spiegel parallel gestellt werden können, derart, daß nur in dieser einen bestimmten Lage eine durch ein Fernrohr gleichzeitig über beide Spiegel beobachtete Strichinarke als eine ZD gerade Linie erscheint.PATENT CLAIM: Mirror device for reading measuring instruments, marked by this, that near the mirror of the moving part a second mirror is attached to the fixed part of the measuring instrument so that for a certain position of this instrument parts to each other put both mirrors parallel can be so that only in this one particular position one through a telescope Bar line observed simultaneously across both mirrors as a ZD straight line appears.
DE1920338206D 1920-04-13 1920-04-13 Mirror device for reading measuring instruments Expired DE338206C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE338206T 1920-04-13

Publications (1)

Publication Number Publication Date
DE338206C true DE338206C (en) 1921-06-15

Family

ID=6222297

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1920338206D Expired DE338206C (en) 1920-04-13 1920-04-13 Mirror device for reading measuring instruments

Country Status (1)

Country Link
DE (1) DE338206C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2437807A (en) * 1943-11-08 1948-03-16 Herbert Ltd A Optical projection dividing head
US2441107A (en) * 1944-12-29 1948-05-04 Eastman Kodak Co Optical projection comparator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2437807A (en) * 1943-11-08 1948-03-16 Herbert Ltd A Optical projection dividing head
US2441107A (en) * 1944-12-29 1948-05-04 Eastman Kodak Co Optical projection comparator

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