US1510799A - Loop aerial - Google Patents

Loop aerial Download PDF

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Publication number
US1510799A
US1510799A US651080A US65108023A US1510799A US 1510799 A US1510799 A US 1510799A US 651080 A US651080 A US 651080A US 65108023 A US65108023 A US 65108023A US 1510799 A US1510799 A US 1510799A
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Prior art keywords
loop
conductor
antenna
cage
strands
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Expired - Lifetime
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US651080A
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Rogers James Harris
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Individual
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00Loop 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
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49002Electrical device making
    • Y10T29/4902Electromagnet, transformer or inductor
    • Y10T29/49071Electromagnet, transformer or inductor by winding or coiling
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00Joints and connections
    • Y10T403/44Three or more members connected at single locus

Definitions

  • the present invention is based on a loop antenna structure which possesses great advantages over the ordinary form.
  • the underlying feature of this antenna is that a multiple turn loop is arranged with its conductors substantially in the surface of a tore whereby a very compact form of antenna is produced, which nevertheless has a very low distributed capacity.
  • a simpler type of the tore-shaped loop is also embodied in one form of the present invention, wherein a single conductor is substituted for the composite one.
  • a process of making the tore-shaped loop antenna is another feature of the present invention.
  • Fig. 1 is an elevation of a loop
  • Fi 2 is a fragmentary diagrammatic detail of part of the loop shown in- 1 showing the type of winding
  • Fig. 3 is a diagram of the means used in winding the loop of Fig. 1;
  • Fig. i is a detail view of a stack of the spacing disks as arranged to facilitate the operation.
  • Fig. 5 shows a modified loop similar to that shown in Fig. 1 except that a single conductor is used in place of a composite one.
  • an antenna comprising a composite conductor 1 formed into a multiple turn loop, and having its ends at binding posts 2 and 8.
  • the composite conductor consists of a plurality of strands, eight being illustrated in the present case, and the loop also comprises eight turns.
  • the loop is supported by a plurality or" radial arms a each of which is slotted at its inner end as shown at 5. Screws 6 passing through the slots 5 serve tosecure these arms -adjustably to the central hub or disk 7, as shown.
  • a vertical support or rod 8 journaled at 9 in the hub 7, as shown, is itself secured to the base 10.
  • a brace 11 is secured to two of the arms l, which may be made longer than the rest, by means of screws 12 passing through slots 13. This brace 1.1 has an aperture 14 fitting the rod 8 loosely, so that the whole structure may rotate about said rod 8.
  • a piece of insulation 15 may be provided as a mounting for the binding posts 2 and 3.
  • Each arm l has a slot 18 at its outer end.
  • Supports 16, best shown in Fig. 2, are held in these slots, by means of screws 17. As illustrated, these supports are circular disks but the shape is subject to modification within wide limits.
  • Each support 16 carries a plurality of conductor holding disks 18, which are secured to the supports 16 by screws 19.
  • These disks 18 are provided with a plurality of holes, a, Z a, d, e, 7', g and h, as shown, to receive the strands of conductor. In the present form, these holes are arranged in circular series.
  • Each disk 18 also has a hole 1'? for the screws 19.
  • the composite conductor comprises eight strands, each strand being held in one of the holes in each disk 18.
  • a cage is thus formed similar to the cage of the prior application hereinabove referred to.
  • This composite conductor passes successively around the supports, and when the whole is wound, it will be seen that the turns of the cage itself form a still larger cage.
  • the strands are transposed regularly in their courses from. disk to disk and the cage is also transposed around sup ports 16, as best shown in Fig. 2, in a $11111 lar manner so that in the finished device all the strands are substantially symmetrically lltl mi ii any more metrical l larger J oi a ms, the closer will be t a. true circular ln order i transposing the was sections oi the cage,
  • the eight strands are then threaded through the Whole set of disks as in 3.
  • the disks 18 are Secured by their screws 17, one at a time, to the appropriate supports 16, whereby the strands in the cage become transposed autoniaticallyin the mere operation of Winding; the loop.
  • FIG. there is shown a simpler type of loop wherein a single conductor is provided in place of the cage.
  • This figure shows diagrammatically a plurality ot radial arms 22 supported by a hub 23, journalled on rod 8.
  • Rod 8 is held by base 10, and passes loosely through brace Q/a which is secured to two of the arms 22, and holds the binding posts 2 and 3.
  • Each arm supports a disk 25 which is apertured to. support the conductor 26.
  • This conductor is threaded through said apertures, as shown at j, It, Z, m, n, o, and g0, and may be and preferably is, transposed from disk to'dislr as in the other type.
  • 'Wlrier l have disclosed a loop wherein the conductors are transposed to secure a high degree oi electrical symmetry, and.
  • An antenna comprising a conductor formed into a multiple turn loop. all the turns oi the loop lying substantially in the surface of a polygonal tore.
  • An antenna comprising a composite conductor formed into a multiple turn loop, all the turns of the composite conductor as a Whole lyingsubstantially in the surface of a polygonal tore,
  • An antenna comprising .a conductor formed into a multiple turn loop, said'conductor having each turn disposed symmetriit pr is ed. to'oinit doctor having each turn disposed substantially in its surfaceof a polygonal tore, the conductor i comprising a plurality of parallel strands arranged in cylindrical surface,
  • i -tn antenna comprising a so duct-or consisting of a plurality ot equidistant pen allcl strands which are successively transposed, said conductor being formed into a multiple turn loop wherein the turns are disposed substantially in the surface of av polygonal tore and are themselves successively transposed so as to be distributed symmetrically over said surface,
  • A; loop antenna comprising a conductor consisting of a plurality of strands electrically connected in parallel but spaced from one another, said conductor as a Whole beingfiormed into a multiple turn coil Wherein all the turns are substantially symmetrically arranged with respect to one another.
  • a loop antenna conun'ising a composite hollow conductor, said conductor between its terminals consisting of a plurality of strands each spaced from its neighbors, and
  • a multiple turn loop antenna comprising a support, radial arms carried thereby, a perforated spacer carried by each arm, the perforations in each spacer beingsub-stau tially uniformly spaced in a closed curve and a conductor traversing the spacers in succession and passing through all the perforations in its complete course about the loop,

Description

Oct. 7 1924.
J. H. ROGERS LOOP AERIAL Filed July 12, 1923 3 Sheets-Sheet 1 gvwenfoz Oct. 7, I924. 1,510,799
J. H. ROGERS LOOP AERIAL Filed July 12, 1923 .3 Sheets-Sheet 2 Get. 7 1924,
, 1,510,799 J. H. ROGERS LOOP AERIAL Filed July 12, 1923 3 Sheets-Sheet 5 85% @Vza, wmfla w for "n 5" Patented (Dot. 7, 33.24.
uro
Application flied July 1.2, $523., Serial 1%. 651,085).
Georges and State of Maryland, have in- -vented certain new and useful improvements in Loop Aerials of which the following is a specification.
' v The present invention is based on a loop antenna structure which possesses great advantages over the ordinary form. The underlying feature of this antenna is that a multiple turn loop is arranged with its conductors substantially in the surface of a tore whereby a very compact form of antenna is produced, which nevertheless has a very low distributed capacity.
in m prior application, Serial No. 607,623, filed December 18, 1922, I lntve disclosed a loop antenna, the turns of which are arranged in a polygonal helix. "While one form of the present device resembles the former in that the loop conductor comprises a plurality of strands connected in parallel but spaced from each other except at their ends, it differs from the prior construction in that the conductor is arranged on a polygonal tore instead of as a helix. This results in a great economy of space and slim plicity of construction. An antenna of the present form is also much easier to manipulate and of substantially the same electrical elliciency as the prior type, forthe same amount of wire used.
A simpler type of the tore-shaped loop is also embodied in one form of the present invention, wherein a single conductor is substituted for the composite one.
A process of making the tore-shaped loop antenna is another feature of the present invention.
For a fuller understanding of the invention, reference should be made to the fol lowing specification descriptive of the preferred forms of" the device, in connection with the accompanying drawings, where- Fig. 1 is an elevation of a loop;
Fi 2 is a fragmentary diagrammatic detail of part of the loop shown in- 1 showing the type of winding;
Fig. 3 is a diagram of the means used in winding the loop of Fig. 1;
Fig. i is a detail view of a stack of the spacing disks as arranged to facilitate the operation.
Fig. 5 shows a modified loop similar to that shown in Fig. 1 except that a single conductor is used in place of a composite one.
Referring first to Figs. 1 and 2, there is shown an antenna comprising a composite conductor 1 formed into a multiple turn loop, and having its ends at binding posts 2 and 8. The composite conductor consists of a plurality of strands, eight being illustrated in the present case, and the loop also comprises eight turns. The loop is supported by a plurality or" radial arms a each of which is slotted at its inner end as shown at 5. Screws 6 passing through the slots 5 serve tosecure these arms -adjustably to the central hub or disk 7, as shown. A vertical support or rod 8 journaled at 9 in the hub 7, as shown, is itself secured to the base 10. A brace 11 is secured to two of the arms l, which may be made longer than the rest, by means of screws 12 passing through slots 13. This brace 1.1 has an aperture 14 fitting the rod 8 loosely, so that the whole structure may rotate about said rod 8. A piece of insulation 15 may be provided as a mounting for the binding posts 2 and 3.
Each arm l has a slot 18 at its outer end. Supports 16, best shown in Fig. 2, are held in these slots, by means of screws 17. As illustrated, these supports are circular disks but the shape is subject to modification within wide limits. Each support 16 carries a plurality of conductor holding disks 18, which are secured to the supports 16 by screws 19. These disks 18 are provided with a plurality of holes, a, Z a, d, e, 7', g and h, as shown, to receive the strands of conductor. In the present form, these holes are arranged in circular series. Each disk 18 also has a hole 1'? for the screws 19.
It will be noted that the composite conductor comprises eight strands, each strand being held in one of the holes in each disk 18. A cage is thus formed similar to the cage of the prior application hereinabove referred to. This composite conductor passes successively around the supports, and when the whole is wound, it will be seen that the turns of the cage itself form a still larger cage. The strands are transposed regularly in their courses from. disk to disk and the cage is also transposed around sup ports 16, as best shown in Fig. 2, in a $11111 lar manner so that in the finished device all the strands are substantially symmetrically lltl mi ii any more metrical l larger J oi a ms, the closer will be t a. true circular ln order i transposing the wer sections oi the cage,
which adjacent to said red as shown in 1 fa wit the loop just described, the preferred ,y to provide a plurality of reels of wire, 20, equal in number to the number of strands in a cage, eight as shown in ig'. fl. llhe entire number of disks 18 is then assembled as in Fig. l, with the Wire holes in register but with the screw receiving holes 21 successively displaced, as shown, by dotted lines. The eight strands are then threaded through the Whole set of disks as in 3. Then the disks 18 are Secured by their screws 17, one at a time, to the appropriate supports 16, whereby the strands in the cage become transposed autoniaticallyin the mere operation of Winding; the loop.
Referring now to Fig. there is shown a simpler type of loop wherein a single conductor is provided in place of the cage. This figure shows diagrammatically a plurality ot radial arms 22 supported by a hub 23, journalled on rod 8. Rod 8 is held by base 10, and passes loosely through brace Q/a which is secured to two of the arms 22, and holds the binding posts 2 and 3. Each arm supports a disk 25 which is apertured to. support the conductor 26. This conductor is threaded through said apertures, as shown at j, It, Z, m, n, o, and g0, and may be and preferably is, transposed from disk to'dislr as in the other type.
'Wliile l have disclosed a loop wherein the conductors are transposed to secure a high degree oi electrical symmetry, and.
prefer such construction, it will be evident that for certain purposes very satisfactory results ma be secured without such trans position and the invention is therefore not to, be considered as limited to the actual forms disclosed.
What l claim is:-
1. An antenna comprising a conductor formed into a multiple turn loop. all the turns oi the loop lying substantially in the surface of a polygonal tore.
2. An antenna comprising a composite conductor formed into a multiple turn loop, all the turns of the composite conductor as a Whole lyingsubstantially in the surface of a polygonal tore,
3. An antenna comprising .a conductor formed into a multiple turn loop, said'conductor having each turn disposed symmetriit pr is ed. to'oinit doctor having each turn disposed substantially in its surfaceof a polygonal tore, the conductor i comprising a plurality of parallel strands arranged in cylindrical surface,
i -tn antenna comprising a so duct-or consisting of a plurality ot equidistant pen allcl strands which are successively transposed, said conductor being formed into a multiple turn loop wherein the turns are disposed substantially in the surface of av polygonal tore and are themselves successively transposed so as to be distributed symmetrically over said surface,
6. A; loop antenna comprising a conductor consisting of a plurality of strands electrically connected in parallel but spaced from one another, said conductor as a Whole beingfiormed into a multiple turn coil Wherein all the turns are substantially symmetrically arranged with respect to one another.
7. A loop antenna conun'ising a composite hollow conductor, said conductor between its terminals consisting of a plurality of strands each spaced from its neighbors, and
each disposed on a path which is substan tially helical with respect to the hollow conductor, said conductor itself being formed into a hollow assembly wl'ierein all the turns are spaced symmetrically from their neighbors.
8. A multiple turn loop antenna comprising a support, radial arms carried thereby, a perforated spacer carried by each arm, the perforations in each spacer beingsub-stau tially uniformly spaced in a closed curve and a conductor traversing the spacers in succession and passing through all the perforations in its complete course about the loop,
9). The process of making acage-loop antenna having perforated spacers for the conductors constituting the cage, which process comprises threading the requisite number of spacers on the individual conductors before the winding operation is started.
10. The process of making a'cage-loop antenna having g'ierlorated spacers for the conductors constituting: the cage, said spacers haying aligning means therein, which process comprises threading the resin site number of spacers on the individual conductors with the aligning means progres sively turned whereby the cage when assembled will have the conductors automatically transposed symmetrically.
ln testimony whereof l affix my signature.
' JAMES lElTAllRlS ill
US651080A 1923-07-12 1923-07-12 Loop aerial Expired - Lifetime US1510799A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4809010A (en) * 1981-10-02 1989-02-28 Canon Kabushiki Kaisha Low profile wireless communication system and method
US4825224A (en) * 1986-09-02 1989-04-25 Eyring Research Institute, Inc. Broad band impedance matching system and method for low-profile antennas
US4829310A (en) * 1981-10-02 1989-05-09 Eyring Research Institute, Inc. Wireless communication system using current formed underground vertical plane polarized antennas

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4809010A (en) * 1981-10-02 1989-02-28 Canon Kabushiki Kaisha Low profile wireless communication system and method
US4829310A (en) * 1981-10-02 1989-05-09 Eyring Research Institute, Inc. Wireless communication system using current formed underground vertical plane polarized antennas
US4825224A (en) * 1986-09-02 1989-04-25 Eyring Research Institute, Inc. Broad band impedance matching system and method for low-profile antennas

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