US1426334A - Selective reception of alternating currents - Google Patents

Selective reception of alternating currents Download PDF

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Publication number
US1426334A
US1426334A US548254A US54825422A US1426334A US 1426334 A US1426334 A US 1426334A US 548254 A US548254 A US 548254A US 54825422 A US54825422 A US 54825422A US 1426334 A US1426334 A US 1426334A
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United States
Prior art keywords
currents
frequencies
frequency
terminals
systems
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Expired - Lifetime
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US548254A
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English (en)
Inventor
Frederick E Pernot
Lester J Rich
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Individual
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Individual
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    • 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

  • the present invention has reference to irn provements in a novel method for the electrical transmission of signals, having for an object to provide a method whereby to effect the separation of currents differing in frequency from one another, as well as for the combination, without mutual interaction of currents of different frequencies.
  • Figure 1 is a schematic view of one form of apparatusfor separating currents of different frequencies
  • Figure 2 is a modified form thereof
  • Figure 3 is a similar view showing another modified form
  • Figure 4 is a. like view illustrating a still further modified means for separating cur-' rents of different frequencies
  • FIG. 5 is a schematic view of yet another modified form of the invention.
  • Figure 6 is a schematic view of a still further modification of our invention.
  • the other terminals 1 and 1 and 2 and 2" of the unit systems are reserved for connection to that portion of the apparatus from which is desired to exclude all currents except those of a single frequency.
  • network Z Z Z and Z is arranged so that the frequency f, is suppressed and therefore, no currents of this 'irequency produced anywhere else in the system can appear at the terminals 2 and 2'.
  • the currents of four frequencies, f,, f,, and f enter at the terminals 0 and the operation of the apparatus will be as tollows :-;lhe four frequencies enter unit system A where f, is suppressed, leaving the frequencies f f and f, to pass on into the unit system B, whereat the frequency f is suppressed.
  • the remaining frequencies f and f, are separated by the unit systems C and D as described in connection with the Figures l or 5, so that finally, at terminals 1 and 1', only the frequency f, is present and at the terminals 2 and 2 only the frequency f, appears.
  • the unit systems E and F suppress frequencies f, and f, in the same man- 'ner as systems A and B suppress frequencies 7, and 1.
  • Systems G and H separate frequencies f, and f, so that f, appears at terminals 3 and 3' and the frequency f, appears at terminals a and l.
  • the first systems A and E may be connected in series instead of in parallel as shown, as is also true with systems (3 and l) and systems G and H.
  • a system for the selective transmission of a plurality of currents of. different frequency between a common transmission'circuit, and circuits individual to said fre uencies comprising a plurality of branc es for said common circuit and sub-branches for each branch, selective suppressing devices for for each frequency a single selective path extending from the common circuit to its in dividual circuit by Way of a branch, a subbranch and seleetive'frequency devices for each of theother frequencies, whereby said other frequencies are individually and successively suppressed.

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  • Aerials With Secondary Devices (AREA)
  • Filters And Equalizers (AREA)
US548254A 1920-11-18 1922-03-30 Selective reception of alternating currents Expired - Lifetime US1426334A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB32569/20A GB180349A (en) 1920-11-18 1920-11-18 New or improved selective circuits for use in connection with alternating currents

Publications (1)

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US1426334A true US1426334A (en) 1922-08-15

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US548254A Expired - Lifetime US1426334A (en) 1920-11-18 1922-03-30 Selective reception of alternating currents

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US (1) US1426334A (fr)
FR (1) FR549306A (fr)
GB (1) GB180349A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2416790A (en) * 1941-01-28 1947-03-04 Sperry Gyroscope Co Inc Transmission line bridge circuit
US2692377A (en) * 1946-01-16 1954-10-19 Jr George A Brettell Position plotter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2416790A (en) * 1941-01-28 1947-03-04 Sperry Gyroscope Co Inc Transmission line bridge circuit
US2692377A (en) * 1946-01-16 1954-10-19 Jr George A Brettell Position plotter

Also Published As

Publication number Publication date
FR549306A (fr) 1923-02-07
GB180349A (en) 1922-05-18

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