US2248782A - Tuning arrangement for electric oscillations - Google Patents

Tuning arrangement for electric oscillations Download PDF

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Publication number
US2248782A
US2248782A US23392438A US2248782A US 2248782 A US2248782 A US 2248782A US 23392438 A US23392438 A US 23392438A US 2248782 A US2248782 A US 2248782A
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US
United States
Prior art keywords
inductance
bail
tuning arrangement
electric oscillations
circuit
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 - Lifetime
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English (en)
Inventor
Puhlmann Werner
Gossel Erich
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.)
Alcatel Lucent Deutschland AG
C Lorenz AG
Original Assignee
Standard Elektrik Lorenz 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 Standard Elektrik Lorenz AG filed Critical Standard Elektrik Lorenz AG
Application granted granted Critical
Publication of US2248782A publication Critical patent/US2248782A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/1205—Particular type of activated sludge processes
    • C02F3/1215—Combinations of activated sludge treatment with precipitation, flocculation, coagulation and separation of phosphates
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P7/00—Resonators of the waveguide type
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P7/00—Resonators of the waveguide type
    • H01P7/02—Lecher resonators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Definitions

  • inductance connected di rectly to the grid and anode of an. electron tube.
  • Such arrangements are in the nature of threepoint feedback connections of the kind in which the capacities of the oscillatory circuits are constituted by the inter-electrode capacities.
  • the inductance of the circuit is a bail, for instance, having tubular member one of which is arranged to slide in the other after the manner of a trombone slide, thus providing for the adjustment of the inductance.
  • Tuning arrangements of this type have the disadvantage that the surfaces of contact of the said bail members allow high frequency currents to flow through the bail, whereby through variation of the transition or contact resistance losses are easy to occur in the circuit.
  • the invention in order to provide for frequency adjustment proposes to fit such a bail-shaped inductance with a displaceable conductive body by which the electric properties of the bail circuit are influenced, this being probably due to ca pacitive detuning.
  • Fig. 1 shows the well known circuit arrangement of devices of this kind
  • Fig. 2 is a partially sectioned view of a tuning arrangement as provided by the invention
  • Fig. 3 shows a section on line 3-3 of Fig. 2.
  • an oscillatory circuit 2 is joined to the grid and anode of a three-electrode tube I.
  • This circuit is interrupted in direct-current fashion by a condenser 3 in order to supply to the tube an adjustable anode voltage from A and an adjustable grid voltage from G.
  • the grid voltage is supplied over a resistance 4.
  • a frequency adjustment is obtained by influencing the inductance.
  • Such influence is in accordance with the invention effected by varying the position of a conductive body with respect to this inductance.
  • conductive body 6 is a solid metal body fastened to an insulating body I.
  • the bodies 6, 1 are carried by a set screw 8 having its thread engaged by thread provided in a support 9 made of an insulating material. Screw 8 is rotatably secured in body 1. This is guided in the cross bar of a bail it, being seated in an aperture 5 thereof.
  • Bail i4 is a solid metal body of rectangular cross section.
  • the electron tube I may be mounted on bail l4.
  • a tuning arrangement for electric oscillations comprising an oscillatory circuit, a metallic generally U-shaped inductance having paral lel sides and a cross bar provided with a noncircular aperture included in said oscillatory circuit, a non-circular insulating body fitting in said aperture to resist rotation while allowing sliding movement, a 1C1'OSS bar supported on said body and extending across said U-shaped inductance from one parallel side to the other but out of contact with both said sides, screw means for sliding said insulating body through said aper ture parallel to said sides of said U-shaped inductance, whereby the position of said conductive body may be changed with respect to said inductance.
  • a tuning arrangement for electric oscillations comprising an oscillatory circuit, a metallic generally U-shaped inductance having parallel sides and a cross bar provided with a noncircular aperture included in said oscillatory circuit, a non-circular insulating body fitting in said aperture to resist rotation while allowing sliding movement, a cross bar supported on said body and extending across said U-shaped in ductarrce from one parallel side to the other but out of contact with both said sides, a set screw rotatably attached. to said insulating body, and an insulating support having a thread enmeshed with said screw whereby rotation of said screw imparts sliding motion to said insulating body for adjusting said conductive body along the sides of said U-shaped inductance.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Power Engineering (AREA)
  • Analytical Chemistry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
US23392438 1937-10-19 1938-10-08 Tuning arrangement for electric oscillations Expired - Lifetime US2248782A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE207145X 1937-10-19

Publications (1)

Publication Number Publication Date
US2248782A true US2248782A (en) 1941-07-08

Family

ID=5793549

Family Applications (1)

Application Number Title Priority Date Filing Date
US23392438 Expired - Lifetime US2248782A (en) 1937-10-19 1938-10-08 Tuning arrangement for electric oscillations

Country Status (5)

Country Link
US (1) US2248782A (enrdf_load_stackoverflow)
BE (1) BE430631A (enrdf_load_stackoverflow)
CH (1) CH207145A (enrdf_load_stackoverflow)
FR (1) FR844609A (enrdf_load_stackoverflow)
NL (1) NL54039C (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2442615A (en) * 1940-04-25 1948-06-01 Electrical & Musical Ind Ltd High-frequency tuner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2442615A (en) * 1940-04-25 1948-06-01 Electrical & Musical Ind Ltd High-frequency tuner

Also Published As

Publication number Publication date
CH207145A (de) 1939-09-30
FR844609A (fr) 1939-07-28
NL54039C (enrdf_load_stackoverflow)
BE430631A (enrdf_load_stackoverflow)

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