US1799208A - Loop antenna - Google Patents

Loop antenna Download PDF

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Publication number
US1799208A
US1799208A US138359A US13835926A US1799208A US 1799208 A US1799208 A US 1799208A US 138359 A US138359 A US 138359A US 13835926 A US13835926 A US 13835926A US 1799208 A US1799208 A US 1799208A
Authority
US
United States
Prior art keywords
loop
wires
pair
loop antenna
sleeve
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
US138359A
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English (en)
Inventor
Bellini Ettore
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US1799208A publication Critical patent/US1799208A/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
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • H01Q7/02—Collapsible antennas; Retractable antennas
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/34—Branched
    • Y10T403/348—Parallel rods
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/44—Three or more members connected at single locus
    • Y10T403/447—Mutually contacting

Definitions

  • the present invention relates to loop antennae and more particularly to collapsible loop antennae for wireless telegraphy and telephony.
  • Figure 1 is a diagrammatic representation of my invention in the form of a hexagon to show the properties thereof.
  • FIG. 2 is a practical embodiment of my invention
  • Figure 3 is a side view of Figure 2 showing the mounting of the wires forming the loop winding.
  • the loop forming the subject-matter of the present invention has its constituent wires always in tensioned or tautened condition whether the coil is mounted or folded.
  • This novel coil is based upon the geometric properties of the hexagon.
  • the radial arms OB, OD and OF will also approach the segment AD. If we assume that the wires of the loop form the sides of the hexagon, they will always be evenly tensioned or stretched, whatever may be the shape of the hexagon, and whether the latter has a regular or irregular form, or it may even be reduced into a straight-line segment.
  • this loop can be built as shown by way of example in Fig. 2 to obtain a solenoidal loop.
  • the shaft S forming the general support of the loop is provided at c with articulations or hinges or joints for. pivotally mounting the two side pieces 1 and 2.
  • a sleeve (1 adapted to slide on the shaft S is provided at its upper and lower ends with similar hinges or joints 0 and f, for pivotally mounting the inner ends of radial arms 7 and 8, and one end of side pieces 4 and 5, respectively.
  • Side pieces 3 and 6 are hinged with side pieces 2, 4 and 1, 5 at hinges or joints d, e and h, g, respectively.
  • the radial arms 7 and 8 are also hinged to side pieces 2, 3 and-1, 6 at d and h, respectively.
  • the distance between 0 and f should be the same as that between a and d, d and 6, etc.
  • a pin P or a clamp screw or any other similar means may be provided to fix the loop in its operating position.
  • the wires 'w forming the loop winding are passed through channels or ducts of insulating pieces 7c fixed perpendicularly at the six apieces 0, (l h.
  • the pin P is removed and the loop is then allowed to collapse and fold by action of its own weight.
  • the loop could be constructed of metal or wood, or almost entirely of metal; but care should be taken so that no closed metallic circuit exists among the hardware parts.
  • a collapsible loop antenna in combination, asupporting shaft, a sleeve slidably mounted thereon, a frame having its adjacent sides pivotally mounted to form a hexagon, a pair of adjacent sides forming an apex of said hexagonal frame pivotally mounted on the supporting shaft, another pair of adjacent sides forming an apex diametrically opposite to said first mentioned apex pivotally mounted on one end of said 7 sleeve, a pair of radial arms pivoted to the other end of said sleeve and to said first mentioned pair of adjacent sides, and means at each apex for supporting wires of a loop winding under tension, the hexagonal frame being c pable of assuming an infinite number of positions between upright and knockdown positions, the arrangement being suchthat the wires of the loop winding willremain taut or under tension in any position.
  • a collapsible loop antenna in combination, a supporting shaft, a sleeve slidably mounted thereon, a frame having iltsadjacent sides pivotallv mounted to form a heXagon, a pair of adjacent sides forming apex of said hexagonal frame ivotally mounted on the supporting shaft, another of adjacent sides forming an apex to said first mentioned apex pivotally mounted on one end of said sleeve, a pair of radial arms pivoted to the other end of said sleeve to said first mentioned pair of adjacent sides, means at each apex for supporting wires of a loop winding under tension, the
  • hexagonal frame being capable of assuming an infinite number of positions between upright and knockdown positions, the arrange inent bei'ngjsu'ch that the wires of the loop winding will remain taut or under tension in any position, and means for locking said hexagonal frame'in built-up position.
  • a collapsible loop antenna comprising su porting shaft, a frame composed of a plurality of peripheral members of equal length, means for pivotally connecting ad ja'ce'nt ends of two of said members to each other and to the supporting shaft, a sleeve slidabiy mounted n said shaft, means for hinging adjacent ends of another pair f said members to each other and to said sleeve, a member connecting the free end of each memberof said first named pair of memhere to the free end of one of said last named it pair of members, a third pair of members having adjacent ends hinged to each other and to said sleeve and their free ends hinged to the free ends of said first named pair of members, and an inductance supported by said frame.

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  • Details Of Aerials (AREA)
  • Aerials With Secondary Devices (AREA)
US138359A 1925-09-30 1926-09-29 Loop antenna Expired - Lifetime US1799208A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR616568T 1925-09-30

Publications (1)

Publication Number Publication Date
US1799208A true US1799208A (en) 1931-04-07

Family

ID=8981675

Family Applications (1)

Application Number Title Priority Date Filing Date
US138359A Expired - Lifetime US1799208A (en) 1925-09-30 1926-09-29 Loop antenna

Country Status (3)

Country Link
US (1) US1799208A (en, 2012)
BE (1) BE336767A (en, 2012)
FR (1) FR616568A (en, 2012)

Also Published As

Publication number Publication date
BE336767A (en, 2012)
FR616568A (fr) 1927-02-04

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