US2512725A - Antenna construction - Google Patents

Description

June 27, 1950 w. c. MocK, JR

ANTENNA CONSTRUCTION Filed May 20, 1948 2 Sheets-Sheet 1 K,JR.

mm P W m C vm V M E L. s, E W WY 3 June 27, 1950 WQWCKJR 2,512 125 ANTENNA CONSTRUCTION Filed May 20, 1948 2 Sheets-Sheet 2 IN V EN TOR.

\ ZESLE'Y C. MocmJg WMWM ATTOFIVE'Y Patented June 27, 1950 UNITED STATES OFFICE This invention relates, as indicated, to antenna construction, but has reference more particularly to a high frequency antenna construction which is particularly adapted for television purposes.

A primary object of the invention is to provide a flexible system of antenna construction, which utilizes a minimum number of types of interchangeable components, which may be assembled into antenna of many useful configurations.

Another object of theinvention isto provide elements for antenna construction which are of novel form and construction, and which can be manufactured in commercially desirable quantities, at low cost, by conventional manufacturing methods.

A further object of the invention is to provide a novel antenna block which lends itself to such a flexible system of construction.

Other objects and advantages of theinvention will be apparent during the course of the follow- 20 ;Fig. 3 is a top plan view of the block shown in Fig. 4 is an elevational view of the face of the block which isv opposite that shown in Fig. 2;

Fig. 5 is an exploded view of an antenna comprising a pair of crossed folded dipoles arranged to produce an omnidirectional pattern, and embodying the principal features of'the invention, and

Fig. 6 is an exploded view showing coupling means employed where a mast extension is to be used.

Referring to Figs. 1 to 4 inclusive of the drawin'gs, there is disclosed an antenna of the folded dipole type, comprising a tubular mast I embraced by a ground clamp 2 to which a ground strap 3 is secured, as bymeans of a screw 4 and nut 5.

The mast I is surmounted by 'a' metallic mast block 6 having a cylindrical projection I which is telescopically insertable in the upper end of the. mast and is adapted to be fastened to the latter by means of a screw S'and'nut 9. Extending through the block 6 is a long screw to one 4 Claims. (01. zso ssi end II! of which an antenna block I2 is secured.

the block I2 being'similar in size to the block 6, but made of electrically insulative material. The block 12 is provided at opposite faces thereof 5 with posts I3 formed integrally with the block I2,

similar in all respects to the block I2, but made of a metallic material. The block II is provided" at opposite faces thereof with posts I 8, formed integrally with' the block, to which tubular antenna rods I9, similar to the rods I4, are secured,

"as by means of screws and nuts '2I.

Antenna end plates 22 are 'secured to the ends of the tubes I4 and I9, as by means of screws 23.

Secured to the ortions of the ends I0 and II of thescrew which extend beyond the blocks I2 and I1 aretubular spreaders 25. Metallic blocks zegisimilarto' the block I! are secured to the Spreaders 25, as by means of screws 21. Each of the blocks 25 is provided with posts 28, extend ing from opposite faces thereof, and tubular antenna, rods 2 9.are secured to these posts, as byv meansofscrews 3B and nuts3I.

.A screw stud .32 is. threadedly secured to the upper face of the block 6, and a lightning are, restor 33 is secured to this screw stud.

The antenna, as thus described, is of the folded dipole type, and includes parasitic elements, in theform of the spreaders 25 and rods 29, which function to increase. the directivity of the antenna. I

directcontact with each other, after which the rods' il' l and 'I 9 are secured to the blocks I2 and I I,

and theen'dpIates-ZZ then secured to-ithe rods Hand-19m *To facilitate proper aligmnent of the blocks I2, 6and I'I'with each; other, the blocks-- are provided in one face thereof with a pair of dowel openings 34 and 35, and-in the opposite face thereof with' a dowel pin 36 and adowel opening 31: This arrangement of dowel and dowel openings-permits oneof the blocks to be rotated 90 degrees relatively to an adjacent block and'locked or'doweled to'the latter.-

Referring to'Fig. 5' of the drawing, 'thereis disclosed an antenna consisting of a 'pair of crossed folded dipoles arranged to'produce an' omni-' directionalzfield pattern.

'The antenna comprises a tubularmast '40 embraced'by a ground 'clampi 4 I, toiwhich a ground fin-the assembly of the various parts of the antenna the-blocks I2, 6 and "are brought into 3 strap 42 is secured, as by means of a screw 43 and nut 44.

The mast 40 is surmounted by a metallic mast block 45 having a cylindrical projection 45 which is telescopically insertable in the upper end of the mast and is adapted to be fastened to the latter by means of a screw 41 and nut 48.

Secured to the block 45 and extending vertically therefrom is a long screw 49, to which the blocks constituting the antenna rod supports are threads edly secured. Immediately above the block 45, a block 50 is disposed, made of electrically insulative material and provided at opposite faces thereofwith posts formed integrally with theblockeand to which tubular antenna rods 52 are secured, as by means of screws 53 and nuts 54. Immediately above the block 50, a bloclc 551s disposed, also made of electrically insulative material and provided at opposite faces thereof with posts 56 formed integrally withthe block, but disposed with their. axis at right angles to the axis of the posts 51. Tubular antenna rods 51' are secured to the posts-5B, as by means of screws58 and nuts-59. Immediately above the block 55, a block Ellis disposed, which is similar in all respects to theblocle5ll, but made of a metallic material, the

block being provided with posts 61 to which-tubular-antenna rods 62-are secured, as-by means of screws 53" and nuts 64.

Immediately above theblock 60, a metallicblock55 is disposed, which is similar tothe block Ell, but has the posts 66' thereof extending with their axis at right angles to the axisof the posts; 61; Tubular. antenna rods 6! are securedto the posts 66, as by means of screws 68 and nuts 69.

End plates ware secured to the ends ofthe rods 52 and 62, as by means of screws H, while end plates 12 are secured to the ends of the rods 5'! andtl, as by-means of screws 13.

A lightning arrestor I4 maybe'secured to the scre w,.49, the lightning arrestor, in this. case, functioning also to clamp all of the blocks to the mast,

In. assemblingthe various parts of this antenna,v the blocksAE. 50, 55, 60v and 65 are brought into direct contact with each other, after, which the rods 52, 62, 5] and 61 are secured tothe blocks, and the end plates I0 and .12 .are then secured to such rods.

In .Fig. 6, means are disclosed for proyiding a mast extension, The tubular mast B0, in this case, is surmounted by a block 8! which has a cylindricalextension 8 2 which fits into the upper end of the mast. The block ill has threadedly secured thereto a screw stud 83 to which an extension collar 84 is threadedly secured. The collarfdthas a circular opening in its upper face adapted to receivethe reduced extension 85 of a mast extension 86. The mast extension 85 is locked to the collar 84 by means of a set screw 81.

It is apparent from the foregoing that by the use of a single basic block of novel form, many types of antenna may be constructed, ranging from simple dipole types to multi-elernent or complex arrays, including parasitic elements, the only elements requiring change for different operatingfrequencies being the antenna rods and Spreaders.

The use of such blocks, in combination with thescrews provides a highly flexible system of'construction, permitting assembly into antennae of many; useful configurations.

It is to be understood that the form of: my invention, herewith shown and described, is to be taken as .a preferred exampleof the same; and.

that various changes in the shape, size and arrangement of parts may be resorted to, without departing from the spirit of my invention, or the scope of the subjoined claims.

Having thus described my invention, I claim:

1. A folded dipole antenna comprising a mast, a cube-like first element surmounting said mast, cube-like second elements disposed in contiguity with said first element, each of said second-named elements. having post-like members formed integrally therewith extending horizontally from opposite faces thereof, tubular rods connected to said extensions, and end plates connected to the endsof said tubular rods.

2. An antenna comprising a mast, a cube-like element surmounting said mast, cube-like elements in verticaltier arrangement disposed above said first-named element, each of said secondnamed elements having post-like members formed integrally therewith and extending horizontally from; opposite-faces thereof, and crossediolded dipoles eonnected to said post-like mernbers=.a r i (i arranged, to produce an omnidirectional fielci pattern.

3; A foldeddipoleantenna comprising a mast;,a cube-like element surmounting said mast' and; having ahorizontally disposed threaded open ing; therethrough, cube-like elements disposed;

adjacent'said first-named element, each of said second-named elements; having post-like extensions formed integrally therewith extendinghori ed-openings and interconnecting all of sai d ele-.

ments, tubular rods connected to said extensions, and" end-plates connected to the ends of, said tubular rods.

4. An antenna comprising a mast, a cube-like. element surmounting said mast, cube like elements inverticaltier arrangement disposed above said. first-named element, each of said seconde, named elements having post-like membersformed integrally therewith andextending horizontally from opposite faces thereof and having also, threaded openings extending vertically; there.-.

through, a single threaded rod extending through all of said threaded openings and interconnectirig all of said elements with each other and with; said; first-named element, and crossed folded dipoles connected to said post-like members and; arranged to produce an omnidirectional f eld pattern.

WESLEY C. MOCK. Jo.

CITED The following references are of "record in-thefile of this patent:

pnrrs STATES PATENTS Number Name Date 1,155,035 Bostw-ick Sept. 28,1915 1,307,674 Kiehne, June 251919. 1,400,066 Huck- Dec. 13, 1921; 2,299,218 ,Fener- H Oct. 2.0, 1942, 2,338,564. Ar-am Jan. 4, reel. 2,364,084 Martin Dec. 5, 19.44, 1,976. P t r $s 2,481,801 Valach Sept. 13, 1349,

' OTHER REFERENCES Tele Tech, March 194.7, page 58 and, page 609,

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