US1404726A - Removing sleet from antenne - Google Patents

Removing sleet from antenne Download PDF

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Publication number
US1404726A
US1404726A US271095A US27109519A US1404726A US 1404726 A US1404726 A US 1404726A US 271095 A US271095 A US 271095A US 27109519 A US27109519 A US 27109519A US 1404726 A US1404726 A US 1404726A
Authority
US
United States
Prior art keywords
conductors
ground
current
switches
connections
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
US271095A
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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
Application filed by General Electric Co filed Critical General Electric Co
Priority to US271095A priority Critical patent/US1404726A/en
Priority to FR512209A priority patent/FR512209A/fr
Application granted granted Critical
Publication of US1404726A publication Critical patent/US1404726A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/02—Arrangements for de-icing; Arrangements for drying-out ; Arrangements for cooling; Arrangements for preventing corrosion

Definitions

  • my invention relates to an organization which will enable the thawing of sleet from a radiating antenna which is provided with a plurality of grounding connections, such, forexample, as one which is described in my prior applications, Serial No. 123,276, filed October 2, 1916, and Serial No. 191,110, filed September 13, 1917, which has issued as Patout No. 1,360,167, dated Nov. 23, 1920.
  • the object of my invention is to provide a system which will overcome such disadvantages and which will possess the advantages of the multiple tuned antenna, and at the same time enable the operator to readily cause heating current to flow through a small portion of the antenna, at one time.
  • a radiating antenna system made up of thirty-two horizontally extending conductors numbered 1 to 32, inclusive. These conductors are supported by the usual towers and cross-spans 33 to 38, inclusive, indicated by dotted hnes in the drawing.
  • the usual ground connection may be provided at the station end of the antenna adjacent the cross-span 33, and the energy introduced to the antenna through the ground connection in the usual manner, this ground connection and the source of energy not being shown in the drawing.
  • Ground connections 39 to 43, inclusive are provided at the other cross-spans 34 to 38, inclusive, and tuning coils 44 to 48, inclusive, are inserted in each of these ground connections.
  • the conductors are connected together at the supporting points in pairs.
  • conductors 1 and 5 are connected together and to ground by means of a lead 49 and disconnecting switch 50.
  • Conductors 9 and 13 are similarly connected by means of the lead 51 and disconnecting switch 52.
  • Conductors 20 and 24 are connected to ground through the lead 53 and disconnecting'switch 54, and conductors 28 and 32 are connected to ground by means of the lead 55ganddisconnecting switch 56.
  • Similar arrangements are used at the other intermediate supporting points, while at the end support 38 all of the conductors are connected together and connected to ground through the ground leads indicated. It will be noted that with the connections shown the majority of conductors not directly conintermediate ground. 'As a result each in-.-
  • each ground connection will carry substantially the same current that it would carry if all of the conductors were connected thereto.
  • the conductors are connected in pairs by means of switches 57 to 72, inclusive,to busbars 73 and 74.
  • a source of heating current which in the present case is indicated as a transformer 75, has its terminals connected to bus-bars 73 and 74.
  • switches 57 to 72, inclusive may then be manipulated by the operator so as to pass heating current through each pair of antenna conductors successively. It will be noted that in the drawing switches 57 to 64, inclusive, are indicated as being closed, switches to 71, inclusive, are open, and switch 72 is closed. With this arrangement of the switches heating current may be passed through conductors 28 and 32 in parallel, and will return through conductors 1 to 16, inclusive, in arallel to the bus bar 73. WVhen the thawing operation has been completed on conductors 28 and 32, switch 72 may be opened and switch 71 closed, allowing current to flow through con ductors 27 and '31, etc.
  • the switching arrangement thus provided will permit the operator to pass heating current through all the conductors successively, and that the maximum heating current required will be the current necessary for heating two conductors at once. It will also be apparent that in case a current source is available which will supply more current than that required for heating two conductors, four, or even more, conductors may be thawed out at one time by suitable manipulation of the switches.
  • the disconnecting switches which are inserted in the individual ground connections will of course be located at some distance from the station.
  • these switches may be opened whenever the sleet begins-to form and may be left open until the formation of sleet on the conductors has entirely ceased. Since sleet forms only in cold weather when transmission conditions are most favorable, the antenna may be operated as a single, radiator during these periodswhen there is danger of sleet forming'on the conductors, and hencethe operation of the station does not need to be interrupted except for the brief period of time required for the actual removal of the sleet.
  • V VVhile'I have indicated only one form of my invention, it will be apparent to those skilled in the art that my invention is by no means limited to the exact arrangement of conductors shown, but that many vari- I ations in the connections employed may be used without departing from the scope of my invention as set forth in the appended claims.
  • a radiating antenna system comprising a plurality of horizontally extending conductors substantially parallel to one another, a plurality of ground connections distributed along the length of said conductors, each of said ground connections whichare intermediate the ends of said conductors being made to a portion only of the horizontal' conductors, the connections being made in such a way that substantially equal charging currents Will be carried by all of the ground connections and the individual wires to which the ground connections are made being so chosen that by reason of the capacity between the wires directly connected to ground and those not directly connected thereto, each ground connection will carry a substantial amount of charging current from the wires not directly connected thereto.
  • a radiating antenna system comprising a. plurality of elevated conductors, a plurality of ground connections distributed along the length of said conductors, each of said ground connections which are intermediate the ends of said conductors being made to a portion only of the elevated con ductors,'the individual conductors to which the ground connections are made being so chosen that substantially the same amount of charging current will be carried by each ground connection as would be the case if all of the conductors were connected to each ground connection.

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  • Variable-Direction Aerials And Aerial Arrays (AREA)
US271095A 1919-01-14 1919-01-14 Removing sleet from antenne Expired - Lifetime US1404726A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US271095A US1404726A (en) 1919-01-14 1919-01-14 Removing sleet from antenne
FR512209A FR512209A (fr) 1919-01-14 1920-01-13 Dispositif pour enlever la glace sur les antennes de t. s. f.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US271095A US1404726A (en) 1919-01-14 1919-01-14 Removing sleet from antenne

Publications (1)

Publication Number Publication Date
US1404726A true US1404726A (en) 1922-01-31

Family

ID=23034171

Family Applications (1)

Application Number Title Priority Date Filing Date
US271095A Expired - Lifetime US1404726A (en) 1919-01-14 1919-01-14 Removing sleet from antenne

Country Status (2)

Country Link
US (1) US1404726A (fr)
FR (1) FR512209A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2712604A (en) * 1951-07-26 1955-07-05 Glenn L Martin Co Antenna assembly with de-icing means

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2712604A (en) * 1951-07-26 1955-07-05 Glenn L Martin Co Antenna assembly with de-icing means

Also Published As

Publication number Publication date
FR512209A (fr) 1921-01-18

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