US1340101A - Method of and means for controlling electrical energy - Google Patents

Method of and means for controlling electrical energy Download PDF

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Publication number
US1340101A
US1340101A US845115A US1914845115A US1340101A US 1340101 A US1340101 A US 1340101A US 845115 A US845115 A US 845115A US 1914845115 A US1914845115 A US 1914845115A US 1340101 A US1340101 A US 1340101A
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US
United States
Prior art keywords
relay
energy
current
source
varying
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
Application number
US845115A
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English (en)
Inventor
Ernst F W Alexanderson
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.)
General Electric Co
Original Assignee
General Electric Co
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
Priority to DENDAT298380D priority Critical patent/DE298380C/de
Priority to FR24391A priority patent/FR24391E/fr
Application filed by General Electric Co filed Critical General Electric Co
Priority to US845115A priority patent/US1340101A/en
Application granted granted Critical
Publication of US1340101A publication Critical patent/US1340101A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C1/00—Amplitude modulation

Definitions

  • My present invention relates to a method of and means for controlling electrical energy and more particularly to the control of energy used for transmitting signals through space. While in the description which follows I have illustrated its utility when applied to wireless telephony, it is capable of use for other purposes as well.
  • the energy which may be controlled in such a system might be increased by connecting several relays in parallel, in which case the amount which could be controlled would vary directly as the number of relays used.
  • a source of high frequency energ 1 is connected through the usual trans ormer 2 with the antenna 3.
  • the primary 4 of an oscillation transformer is also connected in series with the source 1 and the primary of transformer 2.
  • the terminals of the secondary 5 of the oscillation transformer are connected to the anodes 6 of a series of electron discharge devices or relays 7, 8, 9, 10 through resistances 11 as shown.
  • These relays also comprise filamenta ry cathodes 12 with local sources of current 13 for heating the same.
  • the cathodes are surrounded by grid-shaped conducting bodies 1 1.
  • the grids are all connected to one terminal of the secondary of transformer 15, to the other terminal of which is connected a battery 16 and the cathodes are connected to various points in the battery.
  • One end of the battery is preferably grounded as shown.
  • he primary circuit of transformer 15 includes a source of direct current 17 and a telephone transmitter 18.
  • the cathodes are also connected to the middle point of the secondary 5 of the oscillation transformer.
  • An adjustable condenser 19 is preferably connected across the terminals of the secondar of the oscillation transformer 5, althoug in some cases the capacity of the relays may be great enough so that this will not be required.
  • the current in the antenna will varyin accordance with the current through the primary 4 of the oscillation transformer.
  • the amplitude of the current in the primary 4 will in turn depend upon the current flowing in the secondary circuit. It will be apparent that a certain proportion of the energy from the source 1 will be diverted to the secondary circuit and absorbed in the resistances and the relay devices therein.
  • the system may be so designed and adjusted that the, energy thus absorbed will in general bear a certain ratio to the total amount of energy derived from the source 1,
  • the amplitude of the antenna current will be varied in substantially the same proportion.
  • the relays used may assume a great variety of forms. In the form of relay indicated in the present case there will normally be a flow of negative electricity from the cathode to the anodes but no flow of current in the opposite direction.
  • the amplitude of the current flow through the relay may be varied by varying the potential impressed upon the grids 14. If a large enough negative potential is impressed thereon the flow of current may be stopped altogether. If a positive potential is 1mpressed upon the grids the current flow will be increased.
  • the potential of the grid 14 is such that little or no current will flow through the relay 7 when the high frequency potential of thesecondary 5 of the oscillation transformer is applied to the electrodes.
  • the negative potential of the grids of the relays 8, 9 and 10 with respect to their cathodes will be progressively greater. If now a current wave is produced in the transformer 15 of such a direction as to overcome the negative potential of the grids 14, current will begin to flow first through the relay 7 and will gradually increase to a maximum value. I the potential of the current wave is great enough it will gradually-overcome the negative potential of all of thegrids and current will begin to flow successively in relays 8, 9 and 10. It will of course be understood that when the voltage impressed upon the grids from the transformer 15 begins to decrease'the reverse action will take place, that is, current will cease to flow first in relay 10, next in relay 9 and so on until the impressed potential falls to zero and no current will flow as in the begining.
  • the relays may be so designed and the potentials applied thereto so chosen that when the current in relay 7 reaches its maximum, current will begin to flow in relay 8' and when the current in relay 8 reaches its maximum, current will begin to flow in relay 9 and so on.
  • Relay devices of the general type shown herein vary somewhat in their characteristics and in some cases the proportionality between the current fiow and the voltage impressed upon the grid is constant only over a somewhat limited range. In such cases it may be desirable to so choose the potentials applied to the grids that before the current in one relay has reached its maximum, current will begIin to build up in the next relay and so on. n this way the system may be so designed that the current flow therein will be substantially proportional to the voltage variation in the transformer 15 throughout the entire range.
  • resistances 21 may be inserted in series therewith.
  • cuit containing a plurality consists in diverting a certain 2.
  • the method of varying the amplitude of the current flow in a circuit comprising a plurality of parallel paths each of which contains a resistance and a relay device, which consists in gradually varying the conductivity of each one of the paths in succession by varying the electrical field of the relay device therein.
  • a secondary circuit for diverting a portion of the energy from said source, a relay device in said-circuit for varying the amount of energy diverted and a resistance in series with said relay device for absorbing a portion of the energy diverted.
  • 17 he combination in a high frequency signaling system of a signaling circuit, a source of high frequency energy connected thereto, a secondary circuit fordiverting a portion of the ener from said source, a rela device cogidprismg a plurality of electro es interpos in said secondary circuit, a conductin body interposed between the electrodes 0 saidrelay, means for impressing a variable potential upon said conducting body to vary the amount of energy diverted from said source and a resistance in series with said relay device for absorbing a portion of the energy diverted.
  • tribution system of a source of high frequenc alternating current a circuit connecte thereto comprisin a plurality of parallel paths each of whic contains an electron discharge device means for varying the conductivity of eac one of said electron discharge devices in succession and resistances in series with said electron discharge devices for absorbing a portion of the energy in the circuit.
  • Means for controlling the flow of high frequency alternating current in a circuit comprising a plurality of parallel paths comprising a relay device having a cathode and an anode in each of said paths, a current controlling member interposed between said cathode and anode in each of said devices, for gradually varying the current flow therethrough, means for impressing a variable potential upon said controlling members and resistances in series with said relay devices for absorbing a portion of the energy in the circuit.

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  • Physical Or Chemical Processes And Apparatus (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
US845115A 1914-06-15 1914-06-15 Method of and means for controlling electrical energy Expired - Lifetime US1340101A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DENDAT298380D DE298380C (en(2012)) 1914-06-15
FR24391A FR24391E (fr) 1914-06-15 Perfectionnements aux systèmes de radiosignalisation
US845115A US1340101A (en) 1914-06-15 1914-06-15 Method of and means for controlling electrical energy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US845115A US1340101A (en) 1914-06-15 1914-06-15 Method of and means for controlling electrical energy

Publications (1)

Publication Number Publication Date
US1340101A true US1340101A (en) 1920-05-11

Family

ID=25294439

Family Applications (1)

Application Number Title Priority Date Filing Date
US845115A Expired - Lifetime US1340101A (en) 1914-06-15 1914-06-15 Method of and means for controlling electrical energy

Country Status (3)

Country Link
US (1) US1340101A (en(2012))
DE (1) DE298380C (en(2012))
FR (1) FR24391E (en(2012))

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE754205C (de) * 1936-12-23 1953-06-22 Lorenz A G C Anordnung zur Modulation hochfrequenter Schwingungen, insbesondere solcher ultrakurzer Wellenlaenge

Also Published As

Publication number Publication date
FR24391E (fr) 1922-06-20
DE298380C (en(2012))

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