DE890826C - Grinding variometer with high setting accuracy with extremely small variation - Google Patents
Grinding variometer with high setting accuracy with extremely small variationInfo
- Publication number
- DE890826C DE890826C DEL4297D DEL0004297D DE890826C DE 890826 C DE890826 C DE 890826C DE L4297 D DEL4297 D DE L4297D DE L0004297 D DEL0004297 D DE L0004297D DE 890826 C DE890826 C DE 890826C
- Authority
- DE
- Germany
- Prior art keywords
- variometer
- grinding
- extremely small
- small variation
- coil
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/02—Controlling, e.g. stopping or starting
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F21/00—Variable inductances or transformers of the signal type
- H01F21/005—Inductances without magnetic core
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Coils Or Transformers For Communication (AREA)
Description
Die üblichen und bekannten Sch.leifvariometer besitzen eine mit steigendem Drehwinkel und damit größer werdender Spulenlänge steil ansteigende Selbstinduktionskurve. Zwangsläufig ergibt sich daraus eine große Variation. Um eine -gute Reproduzierbarkeit eines vorbestimmten Wertes. zu erlangen, ist es notwendig, den auf die Drafhtl.ängeneinheit oder analog auf den, Drehwinkel' entfallenden Selbstinduktionsanteil klein zu halten.. Ist der Bereich an sich klein, so ergibt sich damit,' auch zwangsläufig ein. kleiner Gesamtdrehwinkel. Schwingkreise im UKW-Bereich weisen nun in der Regel eine Kreisselbstinduktion auf, die mit einer Spule vonetwa i bis 3 Windungen erreicht wird. Der Frequenzbereich kann somit praktisch nur mit einem Drehwinkel von, wenigen Graden bis maximal etwa 72o° bestrichen werden.The usual and well-known loop variometers have a with increasing Angle of rotation and thus increasing coil length steeply increasing self-induction curve. There is inevitably a great variation. Good reproducibility of a predetermined value. it is necessary to use the Drafhtl.length unit or to keep the self-induction component corresponding to the 'angle of rotation' small. If the area is small in itself, 'also inevitably results in a. smaller Total angle of rotation. Oscillating circuits in the VHF range now usually have a circular self-induction which is achieved with a coil of about i to 3 turns. The frequency range can thus practically only with an angle of rotation of a few degrees up to a maximum of about 72o ° can be coated.
Die Erfindung betrifft ein Schleifvariometer, insbesondere für Ultrakurzwellen, dessen Variation bei vielfach größerem Betätigungswinkel extrem klein gehalten ist. Erfindungsgemäß wird vorgeschlagen, zwischen zwei Stromabnehmern einen: Variometerspu@lenabschnitt derart anzuordnen:, daß sich: beim Drehen der Windungsdurchmesser und damit die an den. beiden: Anschlüssen auftretende Selbstinduktion stetig, aber verhältnismäßig sehr langsam ändert. Der grundsätzliche Aufbau eines derartigen: Variometers ist aus der Abb. i ersichtlich. Die beiden. Stromabnehmer a. und b liegen, um einen frequenzbestimmenden. Winkel zueinander versetzt an der Variometerwicklung c an. Da die Variometerspule c kegelig ausgebildet ist, ändert sich beim Drehen kontinuierlich der Windungsdurchmesser des zwischen dien Stromabnehmern, a und b liegenden Spulenabschnittes und damit der entsprechende Selbstinduktionswert. Der Variometerbereich kann beliebig gewählt werden. Er ist von. dem Verhältnis des kleinsten Windungsdurchmessers zum größten abhängig. Die Spanne zwischen dem Anfangs- und Endwert kann über verschieden viel Windungen: erreicht werden. Bei gleichbleibender Windungssteigerung ergeben sich dann. lediglich andere Konizitäten des Kegelkörpers. Durch Einziehen bzw.. Ausbauchen. der Kegelmante@l$äche besteht darüber hinaus die Möglichkeit,- der Induktionskurve eine gewünschte Tendenz zu geben.The invention relates to a grinding variometer, in particular for ultra-short waves, the variation of which is kept extremely small with a much larger operating angle. According to the invention it is proposed to arrange a: Variometerpu @ lenabschnitt between two current collectors in such a way that: when turning the winding diameter and thus the diameter of the windings. both: connections occurring self-induction changes steadily, but relatively very slowly. The basic structure of such a variometer is shown in Fig. I. The two. Pantograph a. and b lie to a frequency-determining. Angle offset to one another on the variometer winding c. Since the variometer coil c is conical, the winding diameter of the coil section between the current collectors, a and b changes continuously when it is turned, and thus the corresponding self-induction value. The variometer range can be selected as desired. He is from. the ratio of the smallest coil diameter to the largest dependent. The span between the start and end value can be achieved over a different number of turns. With a constant increase in the number of turns, the result is then. only other conicities of the cone body. By pulling in or bulging out. The surface of the cone also offers the possibility of - giving the induction curve a desired tendency.
Die kegelige Form der in der Abb. i beschriebenen A-n _rdnüng läßt sich auch abwandeln, z. B. derart, daß die Wicklung. in einer Ebene angeordnet ist. Es ergibt sich dann eine Ausführung; wie sie im Prinzip in der Abb. 2 dargestellt ist. Die beiden Stromabnehmer sind wieder mit a und b und die Variometerwicklung mit c bezeichnet. Eine Charakteränderung der Selbstinduktionskurve läßt sich auch hier erreichen, z. B. durch kontinuierlichen Übergang von einer bestimmten Anfangssteigung auf eine andere, davon abweichende Endsteigung.The conical shape of the design described in Fig. I can also be modified, e.g. B. such that the winding. is arranged in one plane. An execution then results; as shown in principle in Fig. 2. The two current collectors are again marked with a and b and the variometer winding with c. A change in the character of the self-induction curve can also be achieved here, e.g. B. by continuous transition from a certain initial slope to another, different final slope.
Claims (4)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEL4297D DE890826C (en) | 1942-03-19 | 1942-03-19 | Grinding variometer with high setting accuracy with extremely small variation |
FR891323D FR891323A (en) | 1942-03-19 | 1943-02-16 | Slider variometer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEL4297D DE890826C (en) | 1942-03-19 | 1942-03-19 | Grinding variometer with high setting accuracy with extremely small variation |
Publications (1)
Publication Number | Publication Date |
---|---|
DE890826C true DE890826C (en) | 1953-09-21 |
Family
ID=7256469
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEL4297D Expired DE890826C (en) | 1942-03-19 | 1942-03-19 | Grinding variometer with high setting accuracy with extremely small variation |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE890826C (en) |
FR (1) | FR891323A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1002825B (en) * | 1952-08-21 | 1957-02-21 | Aladdin Ind Inc | Tuning device for high frequency with adjustable self-induction |
DE1036339B (en) * | 1954-06-08 | 1958-08-14 | Aladdin Ind Inc | High frequency tuning element for large areas |
-
1942
- 1942-03-19 DE DEL4297D patent/DE890826C/en not_active Expired
-
1943
- 1943-02-16 FR FR891323D patent/FR891323A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1002825B (en) * | 1952-08-21 | 1957-02-21 | Aladdin Ind Inc | Tuning device for high frequency with adjustable self-induction |
DE1036339B (en) * | 1954-06-08 | 1958-08-14 | Aladdin Ind Inc | High frequency tuning element for large areas |
Also Published As
Publication number | Publication date |
---|---|
FR891323A (en) | 1944-03-03 |
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