US2035011A - Shipboard antenna system - Google Patents

Shipboard antenna system Download PDF

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Publication number
US2035011A
US2035011A US724316A US72431634A US2035011A US 2035011 A US2035011 A US 2035011A US 724316 A US724316 A US 724316A US 72431634 A US72431634 A US 72431634A US 2035011 A US2035011 A US 2035011A
Authority
US
United States
Prior art keywords
antenna
condenser
pendulum
ship
shipboard
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
US724316A
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English (en)
Inventor
Rebotier Jean
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.)
Thales SA
Original Assignee
Cie Generale De Telegraphic Sa
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 Cie Generale De Telegraphic Sa filed Critical Cie Generale De Telegraphic Sa
Application granted granted Critical
Publication of US2035011A publication Critical patent/US2035011A/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
    • H01Q1/27—Adaptation for use in or on movable bodies
    • H01Q1/34—Adaptation for use in or on ships, submarines, buoys or torpedoes

Definitions

  • the present invention has for its object the compensation of the effect on the control of antennas for Wireless telegraphy installed on board of ships, produced by the rolling of the ships.
  • this detuning is avoided by means of a compensating organ whose functioning is controlled by the same action, the influence of which is intended to be corrected, that is to say, by the inclination of the ship.
  • a compensating organ whose functioning is controlled by the same action, the influence of which is intended to be corrected, that is to say, by the inclination of the ship.
  • Such action will be obtained for instance, by means of a pendulum or gyroscope.
  • the compensating organ proper will be very easily obtained by means of a variable condenser or a variable self inductance connected in series or in parallel to the antenna, or by means of circuits coupled to the latter.
  • Figure 2 is a section of a variable condenser wherein compensation is controlled by means of a pendulum;
  • Figure 3 is a section of a variable condenser wherein the pendulum forms the movable plate element of the condenser.
  • Figure 1 shows at N a ship, whose antenna A, assumed to be vertical if rolling does not occur, moves, as a result thereof, into an instantaneous inclination oz.
  • the apparent antenna capacity is shown at C in dotted lines. It is obvious that this capacity is a minimum if the antenna is in a vertical position and that it increases with the inclination of the ship in accordance with a law depending upon the shape of the antenna.
  • Figure 2 shows the manner in which the compensation can be obtained by means of a variable condenser controlled by a pendulum.
  • l and 2 represent the two armatures of the condenser and 3 the pendulum.
  • the armature l is fixedly secured to the ship thereby following the inclination a; the armature 2, on the contrary, is maintained in the vertical position by the pendulum. It will thus be readily seen that in this manner a capacity is obtained which is a maximum when the inclination is zero, and which decreases with increasing inclination.
  • Figure 3 shows a preferred embodiment of the invention whereby the pendulum proper forms one of the armatures 2 of the condenser.
  • the other armature I will be formed for instance by two metallic plates fastened to the Walls of a container, containing an insulating liquid, assuring the damping of the oscillations of the pendulum.
  • the profile of the armatures l and 2 can be so shaped that a law of determined variation is obtained by which the variations of the antenna capacity C can be exactly compensated.
  • the condenser is mounted in parallel with the antenna capacity.
  • suifices that, in order to maintain the tuning of the control means, that the sum of the two capacities remains constant.
  • variable condenser of Figures 2 and 3 could be placed in series to the antenna instead of being connected in parallel thereto and these elements could be placed in circuits indirectly coupled to the antenna.
  • variable condenser could be replaced by a variable self inductance or other elements permitting the same result.
  • the pendulum can be replaced by a gyroscope or any other suitable stabilizing element.
  • a shipboard antenna circuit comprising an aerial and a variable tuning element, and means for automatically adjusting the said tuning ele- 40 ment so that the proper frequency of the antenna circuit remains constant, said means being controlled by the rolling of the ship.
  • a shipboard antenna circuit comprising an aerial and a variable condenser connected therewith, and means controlled by the rolling of the ship for automatically adjusting the said condenser so that the proper frequency of the antenna circuit remains constant.
  • a shipboard antenna. circuit comprising an aerial and a variable condenser connected therewith, an armature of this condenser being fixedly mounted relatively to the ship and a second armature being pivotally mounted so as to remain by the weight action in a constant position with respect to the vertical line when the ship rolls, the said armatures being so shaped that the antenna circuit capacity remains constant during, the rollmg.
  • a shipboard antenna circuit comprising an aerial and a. variable condenser connected therewith, an armature of this condenser being fixedly and a second armature being pivotally mounted with respect to the ship, a pendulum attached to the said second armature, and means comprising a predetermined armature shape for maintaining the antenna circuit capacitance constant irre- 5

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  • Details Of Aerials (AREA)
  • Support Of Aerials (AREA)
US724316A 1933-05-18 1934-05-07 Shipboard antenna system Expired - Lifetime US2035011A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR769245T 1933-05-18

Publications (1)

Publication Number Publication Date
US2035011A true US2035011A (en) 1936-03-24

Family

ID=9184668

Family Applications (1)

Application Number Title Priority Date Filing Date
US724316A Expired - Lifetime US2035011A (en) 1933-05-18 1934-05-07 Shipboard antenna system

Country Status (3)

Country Link
US (1) US2035011A (fr)
BE (1) BE402706A (fr)
FR (1) FR769245A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3146450A (en) * 1961-02-01 1964-08-25 Gen Bronze Corp Capacity-compensated motor-driven antenna

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2550390B1 (fr) * 1983-08-03 1985-11-29 Legall Jean Claude Monture d'antenne a stabilisation passive

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3146450A (en) * 1961-02-01 1964-08-25 Gen Bronze Corp Capacity-compensated motor-driven antenna

Also Published As

Publication number Publication date
FR769245A (fr) 1934-08-22
BE402706A (fr)

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