DE962324C - Spring counterbalance for parallelogram drawing machines - Google Patents
Spring counterbalance for parallelogram drawing machinesInfo
- Publication number
- DE962324C DE962324C DESCH17557A DESC017557A DE962324C DE 962324 C DE962324 C DE 962324C DE SCH17557 A DESCH17557 A DE SCH17557A DE SC017557 A DESC017557 A DE SC017557A DE 962324 C DE962324 C DE 962324C
- Authority
- DE
- Germany
- Prior art keywords
- spring
- drawing machines
- parallelogram
- spring counterbalance
- compression
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L13/00—Drawing instruments, or writing or drawing appliances or accessories not otherwise provided for
- B43L13/02—Draughting machines or drawing devices for keeping parallelism
- B43L13/04—Guides for rulers
- B43L13/06—Guides for rulers with pivoted guide rods
Landscapes
- Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
Description
An Parallelogramm-Zeichenmaschinen ist es erforderlich, das den Zeichenkopf tragende Parallelogrammsystem. in jeder Stellung auf dem Zeichenbrett und bei jeder beliebigen Neigung des. Zeichenbrettes im Gleichgewicht zu halten. Rein theoretisch ist ohne besondere getriebetechnische Vorkehrungen ein einwandfreier Federgewich.tsausgleich nicht zu erzielen.On parallelogram drawing machines it is necessary to have the drawing head load-bearing parallelogram system. in every position on the drawing board and in every one to keep any inclination of the drawing board in balance. Just theoretically is a perfect spring weight compensation without any special gear technical precautions not to be achieved.
Durch Reibungswiderstände innerhalb des Paral.lelogrammsystems sowie durch die Auflage des Zeichenkopfes am Zeichenbrett ist es, möglich, in gewissen Grenzen einen praktisch brauchbaren Gewichtsausgleich zu erzielen. Es ist auch bereits bekannt, für Parallelogramm-Zeichenmaschinen einen Federgewichtsausgleich vorzusehen, bei dem die Federkraft durch hintereinandergeschaltete Druck- und Zugfedern bewirkt wird. Bei den bekanntere Federkonstruktionen werden beide Arten von Federn gleichzeitig wirksam. Dadurch wird aber eire einwandfreier Gewichtsausgleich nicht ermöglicht, denn es wird in den verschiedenen. Schräglagen des Zeichenbrettes ein verschieden starker Gewichtsausgleich für das Parallelogramm-System erfordert.By frictional resistance within the Paral.lelogrammsystem as well as by placing the drawing head on the drawing board, it is possible to a certain extent Limits to achieve a practically usable weight compensation. It is already known to provide a featherweight compensation for parallelogram drawing machines, in which the spring force is caused by compression and tension springs connected in series will. In the more popular spring designs, both types of springs are used at the same time effective. However, this does not allow proper weight compensation, because it will be in the different. Slants of the drawing board a different requires strong counterbalance for the parallelogram system.
Gemäß der Erfindung wird diesen Verhältnissen dadurch Rechnung getragen, daß die Zugfeder in an sich bekannter Weise mit Vorspannung gewickelt ist und ihre Kennlinie stärker ansteigt als die Kennlinie der_ Druckfeder. Diese Anordnung ermöglicht es, die Kraftwirkung der beiden Federn bei kleinstem Platzbedarf sauber voneinander getrennt nacheinander wirksam werden zu lassen. In Abb. i ist ein Beispiel für die Anordnung des Gewichtsausgleichs an dsrZeichenmaschinegezeigt; Äbb. a zeigt Einzelheiten der Federkombination; Abb. 3 zeigt das. mit dieser Federkombination erzielbare Federdiagramm.According to the invention, these relationships are taken into account by that the tension spring is wound in a known manner with bias and its Characteristic curve rises more than the characteristic curve of the compression spring. This arrangement enables it, the force effect of the two springs with the smallest space requirement clean from each other to take effect separately one after the other. In Fig. I is an example of the Arrangement of the counterbalance shown on the drawing machine; Fig. a shows details the spring combination; Fig. 3 shows the spring diagram that can be achieved with this spring combination.
In, Abb. a ist das mit seinem einen Ende am unteren Arm der Zeichenmaschine befestigte und über die Rofle d (Abb. i) geführte Seil b an dem Ende c' der Zugfeder c befestigt. Die Zugfeder c ist in an sich bekannter Weise mit Vorspannung gewickelt. Sie ist nicht,' wie üblich, an ihren Enden mit Ösen,, sondern mit Anschlußstücken d und e versehen. In der Zugfeder c ist eine Druckfeder f untergebracht, die mit ihrem einen: Ende an dem Anschlußstück e anliegt. Am anderen Ende der Druckfeder f ist das zurr. Aufhängepunkt g der Feder führende Seil k befestigt.In Fig. A, one end of the rope b, which is attached to the lower arm of the drawing machine and guided over the Rofle d (Fig. I), is attached to the end c 'of the tension spring c. The tension spring c is wound with pretension in a manner known per se. It is not, as usual, provided with eyelets at its ends, but with connecting pieces d and e . In the tension spring c, a compression spring f is housed, one end of which rests against the connecting piece e. At the other end of the compression spring f this is zurr. Suspension point g attached to the spring leading rope k.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DESCH17557A DE962324C (en) | 1955-03-22 | 1955-03-22 | Spring counterbalance for parallelogram drawing machines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DESCH17557A DE962324C (en) | 1955-03-22 | 1955-03-22 | Spring counterbalance for parallelogram drawing machines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE962324C true DE962324C (en) | 1957-04-18 |
Family
ID=7427977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DESCH17557A Expired DE962324C (en) | 1955-03-22 | 1955-03-22 | Spring counterbalance for parallelogram drawing machines |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE962324C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1101218B (en) * | 1960-05-05 | 1961-03-02 | Franz Kuhlmann K G Praez Smech | Weight compensation of a drawing head of a drawing device suspended from a parallelogram guide |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE591791C (en) * | 1932-01-23 | 1934-01-26 | E H Viktor Graf Dr Ing | Weight compensation for the parallel guide arms of parallelogram drawing devices |
-
1955
- 1955-03-22 DE DESCH17557A patent/DE962324C/en not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE591791C (en) * | 1932-01-23 | 1934-01-26 | E H Viktor Graf Dr Ing | Weight compensation for the parallel guide arms of parallelogram drawing devices |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1101218B (en) * | 1960-05-05 | 1961-03-02 | Franz Kuhlmann K G Praez Smech | Weight compensation of a drawing head of a drawing device suspended from a parallelogram guide |
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