US2596389A - Television antenna - Google Patents

Description

May 13, 1952 M. D, ERCOLINO TELEVISION ANTENNA 2 SHEETSSHEET 1 Filed May 25, 1950 fur/enter QErcoZino May 13, 1952 ERCQLlNO 2,596,389

TELEVISION ANTENNA Filed May 25, 1950 2 SHEETS-SHEET 2 ATTORNEYS Patentecl May 13, 1952 UNITED STATES PATENT OFFICE 2,596,389 TELEVISION ANTENNA Michael D. Ercolino, Wanamassa, N. J.

Application May 23, 1950, Serial No. 163,717

1 Claim. 1

This invention relates to television antennas and more particularly a closed ended conical dipole type of antenna assembly carried by a selfsupporting mount adapted for use within a buildmg.

The conical type of antenna has become well recognized as having high gain characteristics making it efliciently responsible for any wide band application to which it is suitably dimensioned. However, the conventional construction of a conical receiving antenna and particularly a stacked array requires a relatively large heavy assembly that must be well supported and firmly fixed on a roof or a special supporting tower. Such construction is not always feasible at the site of the receiver either due to lack of space or due to restrictions prohibiting the erection of an outside antenna.

The present invention overcomes these difficulties by providing antenna construction wherein a stacked conical array is made self-supporting and ready of assembly in the loft of a building or like space enabling the antenna to be completely concealed and supported by ordinary floor or similar building construction,

It is therefore an object of this invention to provide an antenna assembly that is self-supporting and ready of assembly.

Another object is to provide an antenna array for receiving very high frequency, ultra-high frequency, and higher frequencies of electromagnetic waves comprising a correlated reflector and closed ended conical dipoles capable of being an gularly adjusted.

A further object is to provide an antenna that is simple and inexpensive of construction capable of favoring desired signals from one direction while excluding signals from other directions.

A still further object is to provide an antenna so designed that it inherently provides a satisfactory match to a conventional transmission line of either the twin lead or coaxial type.

With these and other objects in view that may appear as the description proceeds, the invention consists in the novel arrangement of cooperating parts as hereinafter more specifically set forth, claimed, and shown in the drawings in which like numbers refer to like parts in the different views.

In the drawings:

Figure l is a plan view of the present invention.

Figure 2 is an end elevation.

Figure 3 is a side elevation taken on line 3-5 of Figure 2 showing details of the frame assembly.

Figure 4 is a detail view taken on line 4-; of Figure 3.

Figure 5 is a detail view taken on line 5-5 of Figure 3.

Referring now in detail to the drawings, the antenna of this invention is shown generally by the numeral I0 and is comprised of an antenna array characterized by having a pair of dipoles II spaced forwardly of a reflector I2 and angularly adjustable relative to and carried by a vertical frame I3. The frame I3 as best illustrated in Figure 3 is provided with a pair of vertically spaced horizontal separating members I4 and I5.

The lengths of members I4 and I5 are such as to provide for suitable spacing of the reflector I 2 from the dipoles I I. This spacing is conventionally accepted as approximately one-fourth wavelength of the mean operating frequency at which the system is to operate with the antenna designed for one-half wavelength operation. The members I4 and I5 are constructed of insulating material such as wood or plastic and of suitable strength to support the weight of the dipoles and reflector members. At opposite ends of the members I4 and I5 are provided pairs I6 and I! of vertical strips separating the members I4 and I5 vertically from each other. The strips I6 and I I are formed of a conducting material such as aluminum or like metal and are provided with oppositely extending end portions I8 turned at right angles to the strips and bored to provide apertures I9 in which are mounted suitable bolt means 29 for angular connection thereto of the ends 2| of the dipoles and reflector members as best illustrated in Figure 5. The pairs of strips I6 and I1 are secured to the horizontal members I4 and I5 by connecting bolts 22 spaced from the angular ends of the strips,

Both the dipoles II and the reflector I2 are formed of suitable metal tubing sections 23 arranged to provide a plurality of irregular triangular shaped cones 21 extending outwardly from the joined frame members I4, I5, I5 and I1. The tube sections 23 are of approximately the same length and are provided with flattened inner ends 2| bolted to the cross members with bolts 20 as previously described with their outer ends 24 also flattened and bolted to vertical tube members 25 as at 26. The lengths of the vertical tube members 25- are such as to close the ends of the cones 21. By closing the ends of the cones 27 by vertical sections 25 causes the dipoles to appear electrically longer, for instance, in securing good coverage for television channel No. 2, namely, 54-60 megacycles, it would be necessary for the sides of the cone 2'! to be 46 inches in length whereas by closing the ends of the cones I have secured eflicient re- 'taining the same physical dimensions as that of spouse in this frequency band with a cone of approximately 36 inches in length. This reduction in length' or overall dimensions of the dipoles provides a more compact antenna array that will require'much less space'for its oper ation and yet provide the same reception that could be attained with a much larger antenna array. This same principle holds true with the construction of my reflector [2 which is similarly constructed and dimensioned to provide an antenna structure having the desired construction characteristics attained by this assemblage. In the forming of the sections 23 only sufiicient lengths need be provided to form a conical dipole response to the lowest frequency s desired. Dipoles H as Well as the reflector [2 being bolted at their inner ends to the supporting members by bolts 28 provides for angular adjustment to decrease or increase the angle at the apexes formed thereby to enable the conical g dipols to be tilted forwardly as desired to change the electrical pattern of the antenna with the reflector panels I2 disposed either perpendicular to the vertical frame 13, as shown, or angu-. larly thereto as found most desirable. Such tilting forwardly of the dipoles II and the angular adjustment of reflector I2 causes the lobes formed in such a pattern to stay in line for all of the higher frequencies enabling the antenna to respond to the desired signals while making it possible to eliminate undesired signals.

The reflector I2 is formed in two'parts similar to the dipoles H in order to provide for angular adjustment relative thereto. The two parts of the reflector l2 are electrically bonded together by a bond means 28 bolted across the pair of strips ll. The bond 28 functions to electrically lengthen the reflector elements I2 with respect to the driven elements or dipoles ll while reii) the driven elements. This simplifies manufacture and assembly. A twin lead 300 ohm transmission line 29 or any suitable radio frequency transmission line is centrally connected to the dipoles 'II by being bonded to opposite sides of the pair of vertical strips I5 as at 30 and 3|.

The preferred mode of mounting andmuse of my antenna is to attach the dipoles H and reflector [2 to the frame I3 with the extended botmade within the scope of the appended claim.

I claim:'

,A television. antenna assemblage comprising a generallyrectangular support frame formed of upper and. lower horizontal bars formed of nonconducting material, pairs of conducting spacer bars disposed one'pair between each end of said first named bars, outwardly projecting cars at j each end of. said spacer bars, oppositely disposed pairs of superposed conical dipoles having the apex ends thereof inwardly, .mcanssecuring said apex ends to the ears of one pair of said spacers, vertically disposed connecting members connecting the outer divergent ends of said dipoles together, a reflector means, means securing said reflector means to the ears of the other pair of spacers, and a conducting connector connected between each pair of said spacers. 7

'MICHAEL D. ERCOLINO.

REFEBENGES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date D. 156,399 Baldi Dec. 13, 1949 2,175,253 Carter Feb. 15, 1938 2,199,050 Jenkins Apr. 30,1940 2,371,539 Morch Mar. 13, 1945 2,494,665 Marshall Jan. 1'7, 1950 2,535,049 De Rosa Dec. 26, 1950

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