US2648770A - Radio antenna - Google Patents

Description

g- 1953 B. w. BLANCHARD, JR 2,648,770

RADIO ANTENNA Filed April 8, 1947 4 Sheets-Sheet 1 ffq i 2L 7 5 25' 55 L "1' f 25 1,3",A f v 76' 62' 30 Z5 24 9.31 INVENTOR.

B. W. BLANCHARD, JR

Aug. 11, 1953 RADIO ANTENNA 4 Sheets-Sheet 2 Filed April 8, 1947 1 INVENTOR. fiegamzln/ W'ilmwiwngcii;

11, 1953 B. w. BLANCHARD, JR 2,648,770

RADIO ANTENNA Filed April 8, 1947 4 Sheets-Sheet 3 g F? 40 k 14. figaii.

"II A INVENTOR.

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Aug. 11, 1953 B. W. BLANCHARD, JR

RADIO ANTENNA Filed April 8, 1947 jeryZWlzi/z Wflbrzdzarddj 4 Sheets-Sheet 4 INVENTOR.

Patented Aug. 11, 1953 UNlTED STATES PATENT OFFICE RADIO ANTENNA Benjamin W. Blanchard,.Jr., PineIHill, N. J. Application April 8, 1947, Serial No. 740.969

4' Claims. 1

My invention relates to a new and useful radio antenna and is related to my application Serial I No. 266,453 while including improvements which enhance the receptive qualities of the apparatus. An object of the invention is to provide an antenna composed of two sets of windings in bilateral relation and each set comprised of three homocentric windings, all so related to one another that the radio wave impulses broadcast from any sending station will be picked up, regardless of the impedance of the receiver, or frequencies or direction of the transmitting station.

Another object of the invention is to provide a radio antenna having unique structural features to produce a rather small and compact organization of parts which will accomplish all of the purposes desired for a device of this character and surpassing any known antenna of its kind.

Another object of the invention is to provide a radio antenna which is equally efiicient on all frequencies and therefore will receive all wave lengths rather than merely quarter, half, three quarters or other sub-divisional or proportional lengths of any full wave. In other words, the elements of the antenna are so arranged that said antenna will receive not only broadcasted short waves but will receive the longest waves employed in broadcasting radio programs rather than receiving only some fractional part of the waves which is one of the causes of poor reception.

Another object of this invention is to provide a radio antenna that has no body capacity and therefore is unaffected by a person or a pet or other animal actually coming in contact therewith or approaching the same.

Another object of the invention is to provide a radio antenna that absolutely is non-directional and therefore may be placed in any position within, on, adjacent to or remote from the radio receiving set.

Another object of the invention is to provide a radio antenna which has little or no effect of outside capacitance and therefore is practically free from static and many interfering elements.

A- further object of this invention is to provide a radio antenna which has a very high degree of selectivity, increases signal strength which makes for amplification and assists in reproducing the received sound waves with fidelity.

A still further object of the present invention is to construct a radio antenna comprised of a chassis or frame having two sets of windings thereon in bilateral relation, each of said sets including several homocentric fiat tubular dead end windings which provide for a continunity of reception or pick-up, and screens which increase the magnetic flux of the radio frequency. -With the above and other, objects in view this invention'consists of the details of construction 2 and combination of elements hereinafter set forth and then designated by the claims.

In order that those skilled in the art to which this invention'appertains may understand how to make and use the same I will describe its construction in detail, referring by numerals to the accompanying drawings forming a part hereof, in which:

Fig. 1 is a view of the chassis or frame for supporting the windings in proper relation.

Fig. 2 is a view of the chassis with the .inner windings in place to plainly show their relation.

Fig. 3 is a similar view showing the inner and intermediate windings in place, the latter being partially broken away to illustrate their relations to one another.

Fig. 4 also is a similar view showing the several windings of each set in position with intermediate and outer ones partly broken away to show details of construction. I

Fig. 5 is an enlarged face view of one of the screens with portions of the outer panel broken away. I

Fig. 6 is a, view of the antenna completely assembled and in a case which is partly broken away to illustrate their general relation.

Fig. 7 is a fragmentary sectional view of the chassis or frame to depict one manner of construction.

Fig. 8 is a sectional elevation, on an enlarged scale, of the chassis or frame, on the line 8--8 of Fig. 1.

I Fig. 9 is a section on the line 9-9 of Fig. 8.

Fig. 10 is an enlarged face view of the completely assembled antenna unit with a portion broken away to illustrate a detail of construction.

Fig. 11 is a longitudinal sectional view thereof on the line llll of Fig. 10.

Fig. 12 is a transverse section on theline I 2l2 of Fig. 11.

Fig. 13 is an end view of the antenna unit with one of the metal rods broken out to show a connection of one screen with the rod to the rear of the broken one.

Fig. 14 is a diagrammatic view of the inner windings.

Fig. 15 also is a diagrammatic view of the intermediate windings.

Fig. 16 is a similar view of the outer windings.

Fig. 17 is an enlarged sectional detail view of one of the screens on the line l1l l of Fig. 5, and

Fig. 18' is a perspective view of the rear of a cenventional radio receiving set showing the connectionbetween the radio antenna and the input of the set. V

In carrying out my invention as herein embodied 20 represents the chassis or supporting frame including two spaced parallel side pieces 2| of any suitable non -conductingmaterial such as, for example, wood and these are, preferably;

ends of said rods and engaging the side pieces.

Inside of the rods 22 and 23,'with 'relationto the chassis, are two other metal rods 26:.and22l, one adjacent to but spaced from each of said rods .22 .and 23 .andsaid'rods :215 and}? .are

projectedJintoholes in,the..,side pieces, .Fig. :7.

Within-the. space between. the side pieces near the center thereof, .considered lengthwise, are two smalltransverse dowels 28 and 29 of-nonconducting material. Thesedowels .are of .the same size and: spaced .to supportcertainwindings to be presently described. outwardly :with respectto the smalldowelsarelocated oneeach of another pair of transversely arranged inter- .mediate sized dowels .30 and ..'3l. The latter dowels are of the same-size as each'other but larger than the small ones-.andspacedqapart ea greater distance than said-small dowels. .Beyondthe intermediate sized dowels rare located one each of still another pair of transverse large sized dowels 32. and :33. are of the same. size ascne another :but larger than the intermediate sized ones and spaced apart a greater distance thansaid intermediate sizedv ones. sTluistherezare three pairs of "difcrease in size from locations adjacent the transversecenter of ,thelchassis .towards both ends thereof.

A metal :rod -34;passes throughallof" the transverse rods and. dowels in the longitudinal axis .of the,chassis-and-strips i-and.36 of insulating material, such as fibre board, aremonnted on the: dowels and the center transverse; rod 32 4, one onaeach sidelof the longitudinahaxiahrod 34 and parallel to the latter. The strips 35 "and 35 have holes of suitable :sizes to receive the dowels and the transverse center rod.

On the smaller dowels 128'andr-23are mounted twdpreformed flatstubular ,dead ehd -= ii1ner windings 31 and 38 of insulation covered wire in bi=lateral relation to each other. Each inner winding is'located between .one of the strips 35, 36 and an adjacent side piece andsoneend of both "of saidinner windings is fixed to..the transverse center rod 24 by making -several turns on "said "rod and securing the same in place by a suitablefasteningdevice, such as'a screw. The other-end of each winding is-secured within itself to prevent unwinding.

On the .pair of intermediate sized dowels30 and 3| are mounted two preformed flat etubular dead end middle windings 39 and 40 also of insulation covered wire in bi-la-teral relation 'to each sother-andsurrounding the-respective inner windings :31 and13B homocentric thereto. One :end. of both of said middle windings is fixed-.110 .:the=transverse endrod 22 'by'making severalfaturns on said mod and securingthe same in place-abysuitable-2: fastening device, such as a screw. The other end of each of "said middle windings: .is secured within :itself to :zpreventsnmwinding.

Like the ether @windi-ngs there are two ,preformedifiat tubular ,dead end outer windings 41 and 42. ,ofin'sulated wiremounted on the larger aThelast mentioned dowels 4 r dowels 32 and 33 in bilateral relation to each other and surrounding the respective middle windings 33 and 40 homocentr-io .to the other and enclosed windings. One end of both of said outer windings is fixed to the other transverse end rod 23 by making several turns on said rod and. securing the same in place by a suitable fastening device, such as a screw. The other end of;each of: said outer windings is also secured within or to itself to prevent unwinding.

actual practice, the several dowels, rods and strips 35 and 36 are assembled and then the preformed windings are slipped over the ends of their respective .dowels vfromppposite sides and one end of each windingfixed :to the proper transverse rod,.-as.above described. Nex-t the side pieces are positionedover-the-.endsrof .the transverse rods and-drawn tightly @against the ends-of the dowelsby thenuts .25. .Itwi11 now be apparent that each succeeding pair-"of dowels will have a diameteras much largerthan the preceding ones as the Y. diameter, at least, of the insulated wire windings, so that -.the

larger preformed 'windingsmaybe readily and easilyslipped over the smaller ones.

Screens 43 and 44 are imposed on opposite faces of the assembled windings and-chassis to increase the magnetic fluxof :the -Radio :Frequency. Each screen'F-igs. 5 and-17, comprises acore panel 45 and two facepanelsa lfi"a'ndeA-l with layers of metal -scre enin gs-:-4B ,intelEpQsed between adjacent panels. Thelayers ofgscreening may be separate sheets or one sheet large enough to be folded-.overthe edge :of -;the icore panel for engagement with I both faces -iof the latter. The panels preferably have holes 143 therethrough and all of the elements of -.the screen are secured together.bysuitable-fastening devices'50, such as rivets.

The screening has two tape or leads;.5l and 52 projecting'therefrom, one at. eachtend,:and are connected thereto so .as to :be in.-.contact with both layers ofthe:screening-aszthoughzan integral part thereof. The taps .5 IV of tone/screen, for example screen 43, is fixed-to the-inner transverse rod 26 adjacent one end of the devicetmvhile thetap 52 of the same screen is nixed uto an outer-transverse rod 23 at the opposite send of the device, and the tap 5| :of the. other screen-as screen '44, is fixed to the inner transverse-rod 21 while the other tap of said-other screen is fixed to the outertransverse rod-22. In'ot-her wordsthe taps-of each screenareattached to inner and outer transverse rods; at opposite ends, respectively, :of the chassis.

A lead 53 for connection with therra'dio input side of a radio receiving-set isattachedto oneend of the metallic skeleton framework and, preferably, to an ,end: of the longitudinal axial rod 34-while a second'lea'd 54, if:desired,'is provided for connection to. an appropriate ground element. Such second lead ::may be attached to'outer transverserod adjacent the location of the .lead v5'3, which. rod as herein depicted isthe one designated by the numeral 23.

The antenna structure described above-may be enclosed ma case oribox :55. of anydesired or preferred material, in which circumstance the lead 53 is fixed to binding post- 56 an'd the lead 54 is fixed toa second :binding post-51, both carried by the case or .::box and positioned-in any desirable or appropriate location, as;.-at'.one end of said case vor box.

In use, the antenna .maybeplaced in zany position, on an .end,-.sideor bnoadface-ieither within or outside of the receiving set and when outside of the set, either adjacent thereto or remote therefrom. This is possible because the device is non-directional and capable of picking up all radio wave lengths or frequencies. It is equally efiicient when used in connection with FM and television reception. For purposes of illustration only, the antenna is shown as resting on top of a receiving set 57 in Fig. 18 with a lead 53a, which is a continuation of the lead 53, attached to binding post 56 of the antenna and the aerial or radio input side of the receiving set represented by the binding post 58. The binding post 59 represents means for connection of the receiving set with a source of electric current.

The antenna herein described is for a purpose similar to that claimed in the patents to Jones, No. 1,840,780; Speaker, No. 1,828,910; Arias 1,820,643; and Graves, 2,039,988, but dissimilar from them in construction and design and by actual comparative tests and experiments by technically qualified Radio Engineers has been found to greatly surpass the performance of the above mentioned antennae of Jones, Speaker, Arias and Graves.

It also has been discovered that distance, clarity, and fidelity are the superior and outstanding results of the invention.

Of course I do not wish to be limited to the exact details of construction herein shown and described as these may be varied within the scope of the appended claims without departing from the spirit of my invention.

Having described the invention what I claim as new and useful is:

1. A radio antenna comprising several homocentric flattened tubular dead end windings of different sizes telescoped within one another, one side of each winding connected to a lead for attachment to a receiving set, and screens disposed on opposite sides of the assembly of windings and connected to said lead, wherein the screens are each composed of a core and face panels of insulation material with layers of metallic screening between adjacent panels.

2. A radio antenna comprising several homocentric flattened tubular dead end windings of different sizes telescoped within one another, one side of each winding connected to a lead for attachment to a receiving set, and screens disposed on opposite sides of the assembly of windings and connected to said lead, wherein the screens are each composed of a plurality of spaced parallel apertured panels of insulating material, layers of metallic screening disposed between adjacent panels, and means to secure said panels and layers of screening together in a unitary structure.

3. A radio antenna comprising duplicate sets of several flattened tubular dead end windings telescoped within one another, a transverse metallic rod extending through the innermost and smallest winding to which one end of each of said smallest windings is connected, second and third transverse metallic rods outside of the sets of windings, one at each end of said sets of windings, an end of each of the intermediate windings connected to one of said end rods and an end of each of the outer windings connected to the other of said end rods, and a longitudinal axial rod connected to the transverse rods and providing part of a lead for connection to the radio input side of a receiving set, in combination with screens disposed at opposite broad sides of the sets of windings and extending completely over the entire area of said sets of windings, each screen consisting of alternative layers of metallic screening and panels of insulating material with panels outside, taps connected with all layers of the screening at opposite ends thereof, one tap of each screen connected to one of the outer transverse rods at opposite ends of the assembly, and other transverse rods outside of the windings and inside of the end rods and to which the other taps are connected at opposite ends.

4. A radio antenna comprising, in combination, a chassis consisting of longitudinal axial metal rod, a center transverse metal rod mounted on said axial rod, three pairs of different sized transverse dowels, the dowels of each pair being of the same size, said dowels mounted on the axial rod with one of each pair on each side of the center transverse rod with the smaller ones adjacent said center transverse rod and the larger ones furthest removed from said center transverse rod, transverse metal outer end rods mounted on the axial rod at the ends thereof, transverse metal inner end rods also mounted on the axial rod adjacent to but spaced from the outer end rods, strips of insulating material mounted on the dowels at both sides of the axial rod, and side pieces connected with all of the transverse rods and secured to a number of said transverse rods and engaging the ends of the dowels, two sets of three preformed dead end windings of different sizes telescopically mounted relative to one another on their respective dowels, the sets being in bilateral relation, one end of each inner and smallest winding connected to the transverse center rod and one end of each outer and intermediate winding connected to opposite transverse outer end rods, said windings being assembled prior to the mounting of the side pieces, screens disposed on opposite sides of the windings, each screen comprising apertured core and face panels in spaced parallel relation and layers of metallic screening disposed between adjacent panels with means to fasten the parts together in a unitary structure and taps at opposite ends of the screen, the taps being connected to an inner and outer end rod at opposite ends of the chassis and the taps of one screen being in opposed relation to those of the other screen, and a lead connected with one end of the axial rod adapted to be attached to the radio input of a receiving set, in combination with a case having binding posts and in which the antenna is completely enclosed with the lead connected to one of said binding posts, and a ground lead connected with one of the outer end rods and the other binding post.

BENJAMIN W. BLANCHARD, JR. References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,792,964 Brooks Feb. 17, 1931 1,820,643 Arias Aug. 25, 1931 1,828,910 Speaker Oct. 27, 1931 1,840,789 Jones Jan. 12, 1932 1,850,914 Bodoh Mar. 22, 1932 1,879,978 Clark Sept. 27, 1932 2,039,899 Graves May 5, 1936 OTHER REFERENCES Radio Engineers Handbook, by F. 'I'erman, 1st ed. pub. 1943, McGraw-Hill Book Co.

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