US2227384A - Electric frequency separator - Google Patents

Electric frequency separator Download PDF

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Publication number
US2227384A
US2227384A US153073A US15307337A US2227384A US 2227384 A US2227384 A US 2227384A US 153073 A US153073 A US 153073A US 15307337 A US15307337 A US 15307337A US 2227384 A US2227384 A US 2227384A
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United States
Prior art keywords
inductances
high frequency
filter
low
condensers
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Expired - Lifetime
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US153073A
Inventor
Wiessner Alfred
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Alcatel Lucent Deutschland AG
C Lorenz AG
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Standard Elektrik Lorenz AG
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type 
    • H01F17/04—Fixed inductances of the signal type  with magnetic core
    • H01F17/045—Fixed inductances of the signal type  with magnetic core with core of cylindric geometry and coil wound along its longitudinal axis, i.e. rod or drum core
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H01F27/366—Electric or magnetic shields or screens made of ferromagnetic material
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H1/00—Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network
    • 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
    • H03H7/46—Networks for connecting several sources or loads, working on different frequencies or frequency bands, to a common load or source

Definitions

  • filter is disposed in the subscribers station and may therefore be designated as subscribers filter and another is disposed in the exchange station or office, and hence may be designated as office filter.
  • the filters consist of a high-pass filter and a low-passfilter. These are made up of inductances and capacities.
  • the low-pass filter comprises inductances included in the line wires and also comprises condensers for short-circuiting these wires in high frequency fashion.
  • the highpass filter is composed of capacities located in the line wires and of inductances disposed between these. It has been proposed to use the low-pass filter at the same time for suppressing disturbing oscillations that arise in the low frequency portion of such an arrangement in both phase coincidence and phase opposition,
  • Such filters should be of the smallest possible place requirements, because in the exchange stations, for instance, many separating filters must be arranged side by side in order to impress the high frequency on the low frequency wires. It
  • Fig. 1 is a partially-sectioned view of an arrangement chosen as an example.
  • Fig. 2 shows a section on line 2-2 of Fig. 11.
  • Fig. 3 is the wiring diagram of a separating filter of known construction.
  • Fig. 4 represents a longitudinal section of a second example of the novel arrangement.
  • Fig. 5 shows a section on line 5-5 of Fig. 4.
  • Figs. 1 and 2 On a spindle I, Figs. 1 and 2, three inductances 5 2, 3, 4 are fixed which may in a suitable manner be used for assembling frequency separators. These inductances comprise windings p which are each enclosed with a shell q of high frequency iron. The shells q are joined to the cores 1' of the inductances by discs s. The discs 5 s and cores 1* likewise are of high frequency iron.
  • Spindle I and thus the inductances mounted on it are fixed in an U-shaped frame 9, for instance, which also carries the condensers ID. This arrangement is contained in a screening case II and thus can be employed for assembling separating filters in a simple manner. Such a filter is shown in Fig. 3.
  • the separating filter In the arrangement represented in Fig. 3 high frequency and at the same time low frequency 15 communications are conveyed to a subscribers station over the wires or, b, these two kinds of communications being segregated by the separating filter.
  • This consists of a low-pass filter A and a high-pass filter B.
  • the low-pass filter A here shown by way of example comprises an H-shaped member, composed of four inductances 2, 3, 4, 4' and two condensers I0 earthed at their center point in order to provide for suppressing 25 the disturbing oscillations which arise in the low frequency portion A.
  • the high-pass filter B comprises four condensers I0, two inductances 6, I and a high frequency transformer 8 which serves to lead away the high frequency communi- 30 cations.
  • the inductances 2, 3, 4, 4' are according to Figs. 4 and 5 disposed on a spindle I and are fitted with shells q of high frequency iron so that the windings 12 thereof are located in these shells. 35
  • the inductances 2, 3 have each a core 1' of high frequency iron.
  • the inductances 4, 4' have both one common core 1- likewise of high frequency iron.
  • the inductances 6, I are mounted on a second spindle 5 and like the inductances 2, 3 40 have each a high frequency iron core T.
  • transformer 8 is mounted which is likewise surrounded with a shell q of high frequency iron.
  • the shells q and cores r are interconnected by discs s of high frequency iron.
  • the 45 spindles I, 5 are interconnected by a frame 9 to which also the condensers ID are fixed in a suitable manner, as by supports I3.
  • the condensers are in this way located between the inductances 2, 3, 4, 4 of the low frequency portion and the 50 inductances 6, I of the high frequency portion.
  • the windings t are connected to the condensers If! by leads I2 in the manner, for instance, shown in Figs. 3 and 4.
  • the parts 2, 3, 4, 4', 6, I, 8, II] may however be interconnected in any other suitable or desired manner. a screening case.
  • the shells q act to concentrate the lines of force so as to prevent them from straying.
  • the arrangement is adapted for use in both subscribers stations and exchange stations and is adapted also to suppress disturbing oscillations that seek to arise in the low frequency portion.
  • An electric filter for separating high frequency currents from low frequency currents including a pair of input terminals for connection to a line, a pair of output terminals for connection to a line, a first set of two closely coupled inductances, a second set of two inductances ma netically isolated from each other, a common core of high frequency iron for the first set of inductances and a high frequency iron shell enclosing said first set of inductances and forming l
  • I also here denotes pairs of terminals, and from one end of each of said two isolated inductances to the other of said pairs of terminals, and from the other ends of said two closely coupled inductances to the other ends of two isolated inductances, respectively, and condensers connected between said other ends of all said inductances to ground.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Filters And Equalizers (AREA)
  • Transformers For Measuring Instruments (AREA)

Description

Dec. 31, 1940. WIESSNER 2,227,384
ELECTRIC FREQUENCY SEPARATOR Filed July 10, 1937 Patented Dec. 31, 1940 UNITED STATES PATENT OFFICE ELECTRIC FREQUENCY SEPAHATOR Application July 10, 1937, Serial No. 153,073 In Germany September 7, 1936 1 Claim.
It is well known to transmit high frequency communications over a network which at the same time serves for the transmission of low frequency communications. For instance, high frequency carrier waves are impressed upon a telephone network in order to serve for the transmission of amusement or alarm communications or signals. In arrangements of this kind low frequency and high frequency must be separated from each other or brought together, as the case may be, by so-called separating filters. One such,
filter is disposed in the subscribers station and may therefore be designated as subscribers filter and another is disposed in the exchange station or office, and hence may be designated as office filter.
The filters consist of a high-pass filter and a low-passfilter. These are made up of inductances and capacities. The low-pass filter comprises inductances included in the line wires and also comprises condensers for short-circuiting these wires in high frequency fashion. The highpass filter is composed of capacities located in the line wires and of inductances disposed between these. It has been proposed to use the low-pass filter at the same time for suppressing disturbing oscillations that arise in the low frequency portion of such an arrangement in both phase coincidence and phase opposition,
Such filters should be of the smallest possible place requirements, because in the exchange stations, for instance, many separating filters must be arranged side by side in order to impress the high frequency on the low frequency wires. It
is most difiicult however so to arrange the inductances within the smallest possible area that no detrimental coupling effects shall arise.
In accordance withthe invention these difliculties are overcome by enclosing the inductances with a shell of high frequency iron and fixing them on a spindle which is common to these inductances.
The invention will be understood from the following description, reference being had to the accompanying drawing in which Fig. 1 is a partially-sectioned view of an arrangement chosen as an example. Fig. 2 shows a section on line 2-2 of Fig. 11. Fig. 3 is the wiring diagram of a separating filter of known construction. Fig. 4 represents a longitudinal section of a second example of the novel arrangement. "Fig. 5 shows a section on line 5-5 of Fig. 4.
On a spindle I, Figs. 1 and 2, three inductances 5 2, 3, 4 are fixed which may in a suitable manner be used for assembling frequency separators. These inductances comprise windings p which are each enclosed with a shell q of high frequency iron. The shells q are joined to the cores 1' of the inductances by discs s. The discs 5 s and cores 1* likewise are of high frequency iron. Spindle I and thus the inductances mounted on it are fixed in an U-shaped frame 9, for instance, which also carries the condensers ID. This arrangement is contained in a screening case II and thus can be employed for assembling separating filters in a simple manner. Such a filter is shown in Fig. 3.
In the arrangement represented in Fig. 3 high frequency and at the same time low frequency 15 communications are conveyed to a subscribers station over the wires or, b, these two kinds of communications being segregated by the separating filter. This consists of a low-pass filter A and a high-pass filter B. The low-pass filter A here shown by way of example comprises an H-shaped member, composed of four inductances 2, 3, 4, 4' and two condensers I0 earthed at their center point in order to provide for suppressing 25 the disturbing oscillations which arise in the low frequency portion A. The high-pass filter B comprises four condensers I0, two inductances 6, I and a high frequency transformer 8 which serves to lead away the high frequency communi- 30 cations.
The inductances 2, 3, 4, 4' are according to Figs. 4 and 5 disposed on a spindle I and are fitted with shells q of high frequency iron so that the windings 12 thereof are located in these shells. 35 The inductances 2, 3 have each a core 1' of high frequency iron. The inductances 4, 4' have both one common core 1- likewise of high frequency iron. The inductances 6, I are mounted on a second spindle 5 and like the inductances 2, 3 40 have each a high frequency iron core T. On spindle 5 also transformer 8 is mounted which is likewise surrounded with a shell q of high frequency iron. The shells q and cores r are interconnected by discs s of high frequency iron. The 45 spindles I, 5 are interconnected by a frame 9 to which also the condensers ID are fixed in a suitable manner, as by supports I3. The condensers are in this way located between the inductances 2, 3, 4, 4 of the low frequency portion and the 50 inductances 6, I of the high frequency portion. The windings t are connected to the condensers If! by leads I2 in the manner, for instance, shown in Figs. 3 and 4. The parts 2, 3, 4, 4', 6, I, 8, II] may however be interconnected in any other suitable or desired manner. a screening case.
The shells q act to concentrate the lines of force so as to prevent them from straying.
The arrangement is adapted for use in both subscribers stations and exchange stations and is adapted also to suppress disturbing oscillations that seek to arise in the low frequency portion.
What is claimed is:
An electric filter for separating high frequency currents from low frequency currents including a pair of input terminals for connection to a line, a pair of output terminals for connection to a line, a first set of two closely coupled inductances, a second set of two inductances ma netically isolated from each other, a common core of high frequency iron for the first set of inductances and a high frequency iron shell enclosing said first set of inductances and forming l I also here denotes pairs of terminals, and from one end of each of said two isolated inductances to the other of said pairs of terminals, and from the other ends of said two closely coupled inductances to the other ends of two isolated inductances, respectively, and condensers connected between said other ends of all said inductances to ground.
ALFRED WIESSNER.
US153073A 1936-09-07 1937-07-10 Electric frequency separator Expired - Lifetime US2227384A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE499591X 1936-09-07

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US2227384A true US2227384A (en) 1940-12-31

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GB (1) GB499591A (en)
NL (1) NL47532C (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2612558A (en) * 1946-08-13 1952-09-30 Paul W Klipsch Crossover filter network
US2688119A (en) * 1953-04-20 1954-08-31 Gabriel Co Printed circuit network system
US2701338A (en) * 1950-10-30 1955-02-01 Douglas Aircraft Co Inc Frequency dividing filter for multifrequency antenna systems
US2855571A (en) * 1955-11-22 1958-10-07 Hazeltine Research Inc Inductance device
DE975037C (en) * 1942-09-29 1961-07-13 Vlieg Corp De Horizontal drilling machine
US3324417A (en) * 1965-03-25 1967-06-06 Gen Cable Corp Shielded common return pairs and coaxial cable
US3671885A (en) * 1970-10-20 1972-06-20 Lindsay Specialty Prod Ltd High frequency signal routing devices for use in catv systems
WO1998001947A1 (en) * 1996-07-08 1998-01-15 Motorola Inc. Unitary packaging system for a capacitor and inductor

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE975037C (en) * 1942-09-29 1961-07-13 Vlieg Corp De Horizontal drilling machine
US2612558A (en) * 1946-08-13 1952-09-30 Paul W Klipsch Crossover filter network
US2701338A (en) * 1950-10-30 1955-02-01 Douglas Aircraft Co Inc Frequency dividing filter for multifrequency antenna systems
US2688119A (en) * 1953-04-20 1954-08-31 Gabriel Co Printed circuit network system
US2855571A (en) * 1955-11-22 1958-10-07 Hazeltine Research Inc Inductance device
US3324417A (en) * 1965-03-25 1967-06-06 Gen Cable Corp Shielded common return pairs and coaxial cable
US3671885A (en) * 1970-10-20 1972-06-20 Lindsay Specialty Prod Ltd High frequency signal routing devices for use in catv systems
WO1998001947A1 (en) * 1996-07-08 1998-01-15 Motorola Inc. Unitary packaging system for a capacitor and inductor
US5838214A (en) * 1996-07-08 1998-11-17 Motorola, Inc. Unitary packaging system for a capacitor and inductor

Also Published As

Publication number Publication date
GB499591A (en) 1939-01-23
NL47532C (en)
BE499591A (en) 1951-03-16

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