GB752013A - Improvements in or relating to delay coils of variable electrical length - Google Patents

Improvements in or relating to delay coils of variable electrical length

Info

Publication number
GB752013A
GB752013A GB1269354A GB1269354A GB752013A GB 752013 A GB752013 A GB 752013A GB 1269354 A GB1269354 A GB 1269354A GB 1269354 A GB1269354 A GB 1269354A GB 752013 A GB752013 A GB 752013A
Authority
GB
United Kingdom
Prior art keywords
coil
delay
former
drum
length
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
Application number
GB1269354A
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.)
Telefunken AG
Original Assignee
Telefunken 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 Telefunken AG filed Critical Telefunken AG
Publication of GB752013A publication Critical patent/GB752013A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/30—Time-delay networks
    • H03H7/34—Time-delay networks with lumped and distributed reactance
    • H03H7/345—Adjustable networks
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K7/00—Modulating pulses with a continuously-variable modulating signal
    • H03K7/08—Duration or width modulation ; Duty cycle modulation

Landscapes

  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Adjustable Resistors (AREA)

Abstract

752,013. Delay coils. TELEFUNKEN GES., [formerly TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE]. April 30, 1954 [April 30, 1953], No. 12693/54. Class 40 (8). [Also in Group XL (c)] Parts of a delay coil are constructed elastically so that its electrical length can be varied by subjecting the parts to a tensile or compressive stress. Two oppositely directed windings 1, 2, Fig. 1, may be tightly wound on a rubber former 3 in such a manner that they are not movable relative to the rubber. It is shown in the Specification that both the inductance L and the capacitance C of the coil are substantially inversely proportional to the length of the coil former so that as the former is expanded the L/C ratio and hence the characteristic impedance remain substantially constant as the delay time of the coil is increased. The coil may have a single winding 2, Fig. 3, upon a tubular rubber former 1A into which is inserted a rod-shaped return conductor 3A. The two windings may be in the form of spiral springs either unsupported or supported upon a coil of rigid material. The delay coil of Fig. 3 may be disposed around the circumference of a drum one end of the coil being anchored to the drum and the other end to a fixed point in such a manner that rotation of the drum causes a change in length of the delay coil. In the arrangement of Fig. 5 several delay coils 1C are connected in series and arranged side by side between two supports 2B, 3B the latter of which is movable to effect variation in delay time.
GB1269354A 1953-05-01 1954-04-30 Improvements in or relating to delay coils of variable electrical length Expired GB752013A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DET7778A DE952106C (en) 1953-05-01 1953-05-01 Runtime coil with changeable electrical length

Publications (1)

Publication Number Publication Date
GB752013A true GB752013A (en) 1956-07-04

Family

ID=25947608

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1269354A Expired GB752013A (en) 1953-05-01 1954-04-30 Improvements in or relating to delay coils of variable electrical length

Country Status (2)

Country Link
DE (1) DE952106C (en)
GB (1) GB752013A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3434052A (en) * 1965-04-23 1969-03-18 Telemecanique Electrique Deformable loop apparatus for measuring alternating currents
US5034737A (en) * 1988-04-08 1991-07-23 Minelco Inc. Magnetic flex core mechanism and method for making same

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE292925C (en) *
DE849126C (en) * 1950-03-29 1952-09-11 Elektrowerk G M B H Device for changing the inductance of ultra short wave circuits

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3434052A (en) * 1965-04-23 1969-03-18 Telemecanique Electrique Deformable loop apparatus for measuring alternating currents
US5034737A (en) * 1988-04-08 1991-07-23 Minelco Inc. Magnetic flex core mechanism and method for making same

Also Published As

Publication number Publication date
DE952106C (en) 1956-11-08

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