DE880493C - Compasses for measuring test sticks - Google Patents
Compasses for measuring test sticksInfo
- Publication number
- DE880493C DE880493C DEM4114D DEM0004114D DE880493C DE 880493 C DE880493 C DE 880493C DE M4114 D DEM4114 D DE M4114D DE M0004114 D DEM0004114 D DE M0004114D DE 880493 C DE880493 C DE 880493C
- Authority
- DE
- Germany
- Prior art keywords
- measuring
- length
- compasses
- stretched
- limbs
- 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
Links
- 210000002414 leg Anatomy 0.000 claims description 12
- 210000000689 upper leg Anatomy 0.000 claims description 2
- 210000003414 extremity Anatomy 0.000 claims 5
- 238000005259 measurement Methods 0.000 claims 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B3/00—Measuring instruments characterised by the use of mechanical techniques
- G01B3/16—Compasses, i.e. with a pair of pivoted arms
- G01B3/166—Compasses, i.e. with a pair of pivoted arms provided with a measuring scale
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length-Measuring Instruments Using Mechanical Means (AREA)
Description
Die Erfindung betrifft einen Zirkel zum Messen der Längenänderung von gereckten und gestauchten Probestäben. Bekanntlich wird beispielsweise die prozentuale Längenzunahme d an gereckten Probestäben errechnet nach der lRormel L - Lo # = .100. The invention relates to a pair of compasses for measuring the change in length of stretched and compressed test rods. As is known, for example, the percentage The increase in length d on stretched test rods is calculated according to the formula L - Lo # = .100.
L0 Hierin ist L - die Meßlänge des gereckten Probestabes und Lo die ursprüngliche Meßlänge des Stabes bei Beginn des Versuchs. L0 where L - the measuring length of the stretched test rod and Lo is the original measuring length of the rod at the beginning of the experiment.
Die Erfindung ermöglicht nun das unmittelbare Ablesen der prozentualen Längenänderung an gereckten und gestauchten Prüfstäben durch einen bekannter Weise mit Zeiger und Maßstab versehenen Meßzirkel dadurch, daß die in ihrer Länge verstellbar eingerichteten Meßschenkel auf eine der jeweillgèn Meßlänge des Probestab es verhältnisgleiche Länge gebracht werden. The invention now enables the immediate reading of the percentage Change in length on stretched and compressed test rods in a known manner with pointer and ruler provided by the fact that the adjustable in length set up measuring legs on one of the respective measuring length of the test rod it is proportionate Length can be brought.
Die Abb. r und 2 zeigen Beispiele der erfindungsgemäßen Ausführung des Meßzirkels. a, al sind die Meßschenkel mit den Meßspitzen b Mnd Maßstábeá c. Figs. R and 2 show examples of the embodiment according to the invention of the measuring circle. a, al are the measuring legs with the measuring tips b Mnd Maßstábeá c.
Die Meßspitzenb sind durch Schrauben fest verklemmbar. Der Meßschenkel a ist in seiner über das Schenkelgelenk hinausgehenden Verlängerung als Zeiger e ausgebildet. Nach Abb. I ist eine Verlängerung des Schenkels al als Bogenstückf, das einen Maßstab g trägt, ausgebildet. Nach - Abb.- 2 ist der Maßstab g unmittelbar auf einem besonders gefonnten Meßschenkel a1 angeordnet. Die Tatsache, daß sich aus dem Unterschied der zueinander gehörigen und gereckten Meßlängen für die gleichen Meßlängenverhältnisse j jeweils gleichbleibende Spreizwinkelgrößen ergeben, gibt erfindungsgemäß die Möglichkeit, anstatt der Spreizwinkelgrößen im Maßstab g die prozentuale Längenzunahme einzusetzen.The measuring tipsb can be firmly clamped with screws. The measuring arm a is in its extension beyond the thigh joint as a pointer e educated. According to Fig. I an extension of the leg is al as a curved piece, that carries a scale g, formed. According to - Fig. 2, the scale g is immediate arranged on a specially shaped measuring arm a1. The fact that from the difference between the corresponding and stretched measuring lengths for the same Measuring length ratios j each result in constant spread angle sizes according to the invention the possibility of instead of the angle of spread sizes on the scale g the to use a percentage increase in length.
Der Zeigere ist so angeordnet, daß er die Nullstellung der Maßeinteilung- einnimmt, wenn die Entfernung der Meßschenkelspitzen voneinander gleich der Meßlänge Lo ist. The pointer is arranged in such a way that it sets the zero position of the graduation assumes when the distance of the measuring leg tips from each other is equal to the measuring length Lo is.
- Borzugsweise erfolgt die Einstellung der Meßschenkel a, al durch Verstellung der Schenkelspitzen b in Schenkelrichtung. Der zur Erleichterung der Einstellung der Schenkel auf den Schenkeln oder Meßschenkelspitzen vorgesehene Maßstab c ist mit einer Maßeinteilung versehen, die der Meßlänge verhältnisgIeich ist. Die Vorteile gegenüber dem Bekannten liegen in der Ausschaltung von Rechenf ehlern und in der Erzielung einer beträchtlichen Zeitersparnis.- Boron, the setting of the measuring legs a, al takes place through Adjustment of the leg tips b in the leg direction. The one to facilitate the Adjustment of the legs on the legs or measuring leg tips provided scale c is provided with a scale that is proportional to the measuring length. the Advantages over the known are in the elimination of calculation errors and in achieving a considerable saving in time.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEM4114D DE880493C (en) | 1944-03-25 | 1944-03-25 | Compasses for measuring test sticks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEM4114D DE880493C (en) | 1944-03-25 | 1944-03-25 | Compasses for measuring test sticks |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE880493C true DE880493C (en) | 1953-06-22 |
Family
ID=7292523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEM4114D Expired DE880493C (en) | 1944-03-25 | 1944-03-25 | Compasses for measuring test sticks |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE880493C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE945191C (en) * | 1954-10-08 | 1956-07-05 | Otto & Co Gmbh Dr C | Method for measuring the changes in length that occur when burning refractory bricks |
| USD258942S (en) | 1979-02-21 | 1981-04-21 | Morris Simon | Body caliper |
-
1944
- 1944-03-25 DE DEM4114D patent/DE880493C/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE945191C (en) * | 1954-10-08 | 1956-07-05 | Otto & Co Gmbh Dr C | Method for measuring the changes in length that occur when burning refractory bricks |
| USD258942S (en) | 1979-02-21 | 1981-04-21 | Morris Simon | Body caliper |
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