US1689337A - Antenna - Google Patents

Description

Oct. 30, 1928. 1,689,337

A. HADDOCK ANTENNA Filed Sept. 22, 1923 Patented Oct. 30, 1928.

UNITED STATES PATENTOFFICE.

ARTHUR HADDOCK, F EAST ORANGE, NEW JERSEY, ASSIGNOR TO WESTERN ELEC- TRIO COMPANY, INCORPORATED, OF NEW YORK, N. Y., A CORPORATION 0F NEW YORK.

ANTENNA.

Application led September 22, 1923. Serial No. 664 17B.

' This invention relates to antennae.

An object of this invention is to flexibly support antenna conductors.

Another object is to enable quick and easy assembly and disassembly of the parts of a loop antenna.

A further object is to adjust the shape of a loop antenna.

An additional object of the invention is to construct an antenna from a flexible multiple conductor.

A further object of this invention is to connect the terminals of a multiple conductor to form a continuous loop.

A feature of this inventionvrelates to an antenna framework comprising collapsible arms for supporting a multiple conductor.

Another feature relates to a loop antenna having means for suspending the same in mid air. y

A further feature concerns an improved connecting blockfor connecting the conductors of a loop antenna. v,

This invention may consist of a loop ductor. This multiple conductor may comprise a plurality of conducting strands interwoven with insulating material. The individual strands may also be provided with an individual insulation, and are preferably spaced at equal distances apart. A multiple conductor of the type which is preferred for use in this invention is described in Patent 1,054,784 to McBerty, dated March 4, 1913. The ends of such multiple conductor are preferably attached to insulating blocks having conducting terminals individual to the strands of the multiple conductor and arranged in such manner that when the blocks are fitted together the strands of the multiple conductor will form a continuous circuit. A looped conductor of this character` may be utilized as an antenna by making properconnection to its terminals and by arranging the loop in any desired manner;

as, for example, by suspending it over a supporting member. As a means of supporting the loop conductors, there is described herein a supporting framework which may, if desired, be constructed in such manner that it may be folded into small compass.

Drawings to which reference is made hereafter in the detailed description illustrate embodiments of this invention as e5 follows:

antenna constructed from a'multiplel con-v Fig. 1, a loop antenna constructed of ak multiple conductor mounted upon a collapsi- Fig. 3, a perspective view of another type of loop antenna constructed according to this invention.

Fig. 4, a perspective view of one half of the connecting block 11 of Figs. 1 and 3.

Fig. 5, a perspective view of the other half of connecting block 11.

Fig. 6, a side elevation of the connecting block 11, showing the manner in which its two halves arefitted together andheld in place.

Fig. 7, a schematic circuit of the solenoidal loop constructed according to this invention.

Fig. 8, a schematic circuit ofv another solenoidal loop with loop conductors transposed to reduce the distributed capacity.

Fig. 9, a length of the multiple conductor of this invention.

Fig. 10, a cross section on line 10-10 of the multiple conductor of Fig. 9.

Referring to Fig. 1, the multiple conductor 10 with its ends attached to a connecting block 11, is supported upon a collapsile frame 12 provided with a clevis 17 by which the loops may be suspended. The frame 12 comprises 'four lattice arms 14 attached to each other at a central point by hinged joints 13. These may be lengthened or shortened and held in position by adjustving winged nuts 15.V The connecting plug 11 has terminals 32 and 33 provided for connecting the loop circuit j to external apparatus.

Although this antenna is shown constructed with four arms, it is evident that any number of arms greater or less may be provided in the manner described. Thus a loop of triangular or polygonal shape may be formed. If the number of arms be sufficiently large and properly adjusted, a subtween the two halves of a double roller 16. rlhe remaining arms 14 of the frame 12 are similarly constructed with the exception that the hanger 18 of the clevis 17 is omitted.

In Fig. 3 a perspective view of the-antenna of this invention is shown in which the flat multiple conductor is arranged on pegs 20, which may be ordinary wire nails but which are preferably of insulating material attached to a frame 21 mounted upon a base 22. The ends of the flat conductor 10 are attached to a connecting block 11 similar to that shown in Fig. 1.

In Fig. 4 one half of the connecting block l1 is shown in perspective. The end of the multiple conductor is attached to a bloclr 24 of insulating material having a portion cut away at 25 to form a step on which conducting terminals 26 are fixed. These terminals are connected individually to all but one of the strands 27 of the multiple conductor 10. The remaining strand 27 connects to a screw terminal 32 mounted upon the upper portion of the block.

In Fig. 5, a similar block 24 of insulating material has the other end of multiple conductor 10 attached to its opposite side. rlhe opposite ends of all but one of the conduct-A ing stands 27 are connected to inuii-*idual -conducting terminals similar to 26 of Fig.

4. These terminals not shown are placed on the under side of block 24 and have ends passing up through holes 29. These terminals are arranged to connect to respec- Ytive terminals 26 of bloclr 24, when the two halves are together. The last conductingl strand 27 connects to a screw terminal 33 on the upper side of the block. Terminals and 33 are provided for connecting the loop to external circuits. Holes 28 and 28 are provided in the blocks of Fig. 4 and Fig. 5 vrespectively through which bolts may be inserted for holding the two halves of the bloclr together. These holes are so positioned that when bolts are inserted therethrough, the respective terminals of the conductors 27 will be properly connected to each other.

Fig. 6 Vis a side elevation of the terminal block 11 which shows the manner in which the two halves 24 and 24 are fitted together. The two halves 24 and 24 are held by means of bolts 30 passing through the holes 28 and 28 and fitted with winged nuts 31.

Fig. 7 shows one way in which the conductors of the loop antenna may be ton` netted together to from a closed circuit. This is the ordinary connection 'of thel conductors in a solenoidal loop antenna.

Fig. 8 shows an alternative circuit in which the conductors of the loop are transposed so that the distributed capacity between them is reduced. The particular circuit desired may be obtained by proper connection of the conductor strands 27 to the terminals l26 on the connecting block 11.

In Fig. 9 a length of flat multiple condurtoi `utilized in this invention is shown. It comprises a plurality of conducting strands 27 equally Aspaced in a fabric of woven insulation 35. The conductors 27 may, if desired, be provided with individual coverings of insulation, as, for example, enamel, silk or cotton.

Fig. 10 shows a View in cross-'section on line 10-10 of the conductor of Fig. 9.

In the use of this antenna, it is proposed that the conductor 10 may be dismounted from the frame 12 upon which itis supported by removing bolts 30 from terminal block 11. rIhe multiple conductor may then be rolled or folded into a compact form. rIhe frame shown in Fig. 1 may be folded by `loosening winged nuts 15 and compress-Y ing the collapsible arms 14. If desired, the

multiple conductor 10 may be wrappedaround the folded frame 12.

An antenna constructed in accordance with this invention which has been found to operate successively comprises a fiat Vconductor having seven strands, spaced approximately {finch apart. This conductor is arranged into a loop 4 feet square. The strands o f this loop comprise No. 24 tinued copper wire.

Certain specific forms of this invention have been described herein, but it is apparent that numerous other applications and structures may be devised by persons skilled in the art, which may be included withinthe scope of this invention.

lVhat is claimed is:

A loop antenna comprising a flat multiple conductor, comprising a plurality of 'equally spared conducting strands parallel to a single plane interwoven with a fabric of insulating material, mounted upon a plurality of adjustable arms, and a connecting block of two sections having conducting pieces on each section connected to the ends of saidV conducting strands and so arranged that when the two sections of said con-l necting block are joined together a continuous solenoidal winding results with the individual strands so cross-connected that the distributed capacity of the antenna is reduced to a minimum.

In witness whereof, I hereunto subscribe my name this 21st day of September A. D., 1923.

, ARTHUR Hann ooit.

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