DE630800C - Set up on control apparatus with fall arrest scanning - Google Patents
Set up on control apparatus with fall arrest scanningInfo
- Publication number
- DE630800C DE630800C DEH136527D DEH0136527D DE630800C DE 630800 C DE630800 C DE 630800C DE H136527 D DEH136527 D DE H136527D DE H0136527 D DEH0136527 D DE H0136527D DE 630800 C DE630800 C DE 630800C
- Authority
- DE
- Germany
- Prior art keywords
- drop
- spring
- expansion body
- periodic
- scanning
- 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
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B11/00—Automatic controllers
- G05B11/44—Automatic controllers pneumatic only
-
- 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
- G01D5/14—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 the magnitude of a current or voltage
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B1/00—Comparing elements, i.e. elements for effecting comparison directly or indirectly between a desired value and existing or anticipated values
- G05B1/01—Comparing elements, i.e. elements for effecting comparison directly or indirectly between a desired value and existing or anticipated values electric
- G05B1/04—Comparing elements, i.e. elements for effecting comparison directly or indirectly between a desired value and existing or anticipated values electric with sensing of the position of the pointer of a measuring instrument
- G05B1/08—Comparing elements, i.e. elements for effecting comparison directly or indirectly between a desired value and existing or anticipated values electric with sensing of the position of the pointer of a measuring instrument stepwise sensing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H43/00—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed
- H01H43/30—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to thermal action
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Endoscopes (AREA)
- Temperature-Responsive Valves (AREA)
Description
Zum Antrieb von Regelapparaten mit Fallbügelabtastung, beispielsweise elektrischen Temperaturreglern, wird ein Antriebsmechanismus benötigt, der eine langsame^ periodische Bewegung ausführt.For driving control devices with drop bar scanning, for example electrical ones Temperature regulators, a drive mechanism is needed that has a slow ^ periodic Movement.
Während es bei den in der Meßtechnik gebräuchlichen Registrierapparaten mit Punktaufzeichnung vor allem darauf ankommt, daß der Fallbügel rasch auf und ab bewegt wird, so daß dieser den Instrumentenzeiger nur ganz kurzzeitig berührt, wobei bereits ein leichter Andruck gegen den Zeiger genügt, kommt es bei der Abtastung von zur Regelung benutzten Apparaten auf eine langsame, weich aufsetzende Aufundabbewegung des Fallbügels an, damit die meist sehr zarten Instrumententeile nicht durch plötzliche Bewegungen beschädigt werden. Dabei müssen die für Regelzwecke benutzten Antriebsvorrichtungen für Fallbügel auch in der Lage sein, größere Kräfte zu entwickeln, so daß stets eine sichere Schaltung gewährleistet ist. Diesen an eine Antriebsvorrichtung für Fallbügel bei Regelgeräten zu stellenden Anforderungen wird im allgemeinen genügt, wenn als Antriebsmittel kleine Elektromotoren unter Einschaltung einer großen Übersetzung benutzt werden; sie sind auch vielfach in Gebrauch, aber ihre Anschaffung ist teuer und ihre Wartung zuweilen umständlich. Deshalb hat man auf verschiedenen Wegen versucht, sie durch einen thermischen Ausdehnungsmotor zu ersetzen, beispielsweise indem ein elektrisch beheizter, sich krümmender Bimetallstreifen einen Schalter betätigt, mit diesem seinen eigenen Heizstrom ausschaltet und dann, sich streckend, ihn wieder einschaltet.While it is common in measuring technology recording apparatus with point recording What matters most is that the drop bracket is moved quickly up and down so that it only touches the instrument pointer touched very briefly, whereby a slight pressure against the pointer is sufficient, When scanning devices used for regulation, there is a slow, soft up and down movement of the drop handle, so that the mostly very delicate instrument parts cannot be damaged by sudden movements. The drive devices used for control purposes must for drop stirrups also be able to develop greater forces, so that safe switching is always guaranteed. This to a drive device for drop stirrups In the case of control devices, requirements are generally sufficient if small electric motors are used as drive means Insertion of a large translation can be used; they are also often in use, but they are expensive to purchase and sometimes difficult to maintain. Therefore one has tried in different ways to replace it with a thermal expansion engine, for example by a electrically heated, curving bimetallic strip actuates a switch with this turns off its own heating current and then, stretching, turns it on again.
Eine solche Einrichtung genügt zwar den Erfordernissen der Einfachheit, Billigkeit und der Langsamkeit. Sie hat aber den Nachteil, daß der Bimetallstreifen verwendbarer Größe keine nennenswerte mechanische Kraft auszuüben imstande ist. Dasselbe gilt von ähnlichen Einrichtungen, bei denen beispielsweise Ausdehnungsdrähte (Hitzdrähte) _ statt des Bimetallstreifens verwendet werden. Greift man zu massiven Ausdehnungskörpern, wie Stäben oder Rohren, so erhält man zwar bedeutende Kraftleistungen, aber die Periode des einzelnen Arbeitsspiels, die mitunter nicht länger als einige Sekunden sein darf, wird ein Vielfaches dieser Zeit.Such a device satisfies the requirements of simplicity, cheapness and of slowness. But it has the disadvantage that the bimetallic strip of usable size is unable to exert any appreciable mechanical force. The same is true of similar ones Facilities in which, for example, expansion wires (hot wires) _ instead of the Bimetal strip can be used. If you use massive expansion bodies, like Rods or tubes, you get significant power outputs, but the period of the individual work cycle, which sometimes may not be longer than a few seconds, becomes a Multiples of this time.
Gemäß der Erfindung wird als thermischer Ausdehnungskörper kein starres Gebilde benutzt, sondern Luft, Gas oder eine Flüssigkeit mit bestimmtem Siedepunkt oder geeignetem Ausdehnungskoeffizienten, die in eine in der gewünschten Richtung dehnbare Umhüllung, vorzugsweise ein Wellrohr, eingeschlossen sind. Dieser Körper wird von innen oder außen elektrisch geheizt und arbeitet im übrigen in ähnlicher Weise wie die bekannten' Ausdehnungskörper bei thermischen Schaltern.According to the invention, no rigid structure is used as the thermal expansion body, but air, gas or a liquid with a certain boiling point or a suitable one Coefficients of expansion, which can be stretched in the desired direction in an envelope, preferably a corrugated pipe, are included. This body is electrically heated from the inside or outside and works in the rest in a similar way to the known 'expansion body in thermal switches.
In der Abbildung ist ein Ausführungsbeispiel dargestellt. 1 ist der Äusdehnungskörper mit der hier im Innern befindlichen Heizwicklung. Sich ausdehnend, hebt er den Hebel 2, der dabei die Quecksilberröhre 3An exemplary embodiment is shown in the figure. 1 is the expansion body with the heating coil located inside here. Expanding, he lifts that Lever 2, which is holding the mercury tube 3
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEH136527D DE630800C (en) | 1933-06-13 | 1933-06-13 | Set up on control apparatus with fall arrest scanning |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEH136527D DE630800C (en) | 1933-06-13 | 1933-06-13 | Set up on control apparatus with fall arrest scanning |
Publications (1)
Publication Number | Publication Date |
---|---|
DE630800C true DE630800C (en) | 1936-06-06 |
Family
ID=7177529
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEH136527D Expired DE630800C (en) | 1933-06-13 | 1933-06-13 | Set up on control apparatus with fall arrest scanning |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE630800C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2578992A (en) * | 1947-10-17 | 1951-12-18 | Bendix Aviat Corp | Electrosteam actuator |
US3807176A (en) * | 1971-06-30 | 1974-04-30 | United Stirling Ab & Co | Multiple cylinder stirling engine with equalized high pressure in cell cylinders |
-
1933
- 1933-06-13 DE DEH136527D patent/DE630800C/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2578992A (en) * | 1947-10-17 | 1951-12-18 | Bendix Aviat Corp | Electrosteam actuator |
US3807176A (en) * | 1971-06-30 | 1974-04-30 | United Stirling Ab & Co | Multiple cylinder stirling engine with equalized high pressure in cell cylinders |
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