US1336398A - Radiosignaling apparatus - Google Patents

Description

R. A. WEAGANT.

RADIOSIGNALING APPARATUS. APPLICATION FILED FEB. 1, 191a. RENEWED SEPT, 16, 1919. 1,336,398.

Patented Apr. 6 1920.

UNITED sTA rns PATENT QFFICE.

ROY ALEXANDER WEAGAN T, OF NEW YORK, N. Y., ASSIGIIOR, BY MESNE ASSIGN- MENTS, T0 RADIO CORPORATION OF AMERICA, A CORPORATION OF DELAWARE.-

RADIOSIGNALING APPARATUS.

Specification of Letters Patent.

Patented Apr. 6, 1920.

Application filed February 1, 1918, Serial No. 214,828. Renewed September 16, 1919. Serial No. 324,217.

To all whom it may concern Be it known that l', ROY ALEXANDER YEA- GANT, a citizen of the United States, and resident of Douglas Manor, county of Queens, city and State of New York, have invented certain new and useful Improvements in Radiosignaling Apparatus, of which the followin is a specification, accompanied by drawings.

This invention relates apparatus and more particularly to conductors for radio frequency currents. l have shown the invention appliedto radio signaling apparatus ofthe same general charactor as that described in my co-pending application, Serial Number 181,458, ,filed July 19, 19.17, but the invention is applicable to any suitable type of apparatus.

staticdisturbances in radio communication.

A plurality of separated antenna: are em ployed, so located and adjusted that static effects produce currents therein substantially similar in phase, while signal waves produce currentsdissin'iilar in phase. 1 am thus enabled,"by suitable circuits and apparatus, to detect the signals whileelimina'ting or'at least greatly reducingthe interference due to static disturbances.

As stated in my application. referred to,

I the antennae may be separated, for instance,

by a distance equal ,to one-half a wave length, and 1n receiv ng on long wave lengths, this distance Wlll be considerable measured in actual linear units, so that con-' siderable length of connecting leads is required betwcn the receiving appa aims and the antenna,assuming that the receiving both signals, and effects due to static disturbances, so t hat it is desirable to eliminate as far as possible the effects in the leads themselves. I have found that if these connections or leads are prevented from picking up the signals and the effects due to static disturbances, the reception of signals in the receiving apparatus is still further improved and the'slight residium of disturbances, which I' 'am led to believe originates in the long conducting leads, is eliminated.

to radlo signaling,

Vari0us means may be employed for electricall y shieldlng the leads, and in the ac "companying drawings 1- have shown suitable and preferred means for carrying out tions.

Referring to'the drawings, A A represent. two antennae, shown in this instance by way of illustration, as loop antennae, preferably in substantially the same plane I and adapted to receive signals from a dis- In that application I disclosed a method and means for el minating the effects of to received signal waves and heterogeneous waves due to static disturbances, in the manner described in detail in my application referred to. Each of the pairs of leads, B and B, preferably has included therein suitable tuning inductances, C and C", and variable capacities in the form of condensers C and C, from which tuning means the connections B and. '13 lead to pairs of coils D and D. I The circuits of the coils I) and D are shown in this instance completed through capacity elements or variable condensers E and E.

Within the space affected by the coils D and'D' and preferably rotatably' mounted on an axis, 17-, parallel to the planes of the vcoils D and I) is a coil F, which is subjeeteil to the fields of force set up in coils TI) and I), and which is suitably connected to the detecting and indicating circuits. By suitably connecting the coils and adjusting the angular position; of coil, F,'the effccts'due to the'static disturbances neutralize or are combined differentially in the coil 1*, while theeifects dueto the signal waves combine cumulatively to produce a resultant current in coil F, all in accordance with my discovery as set forth at length in my co-pending application hei'einbcfore referred to. a

M may be as shown, including, in addition to the usual plate circuit 1 (.2 R 9, an oscillatory circuit P U W S.

I have devised a conductor shielded from the ait'ects of arriving radio waves whether signal waves or static disturbances, and by connecting the antennw A. and A tothe receiving apparatus by means of my improved conductors, i am enabled to largely reduce or practically eliminate the residuum of disturbances which might originate in the leads .8 and B. r J

As illustrated "in the drawings, the leads l5 and B may be provided substantially throughout their length with electrical shields of conducting material which may be in the form of continuous lead covered cables B and B as shown in Fig, 1, or the lead covering may be in sections l5", as shown in Fig. 5. In Fig. 2 ,a sectional view is shown of the cable B The connections or leads B are-preferably first provided with an insulated covering B" and surrounded by the conductive covering B forming the cable. The discontinuous conductive covering B still further tends to prevent signal waves or static disturbances from setting up oscil-.

latory currents in the leads.

In the modification shown in Fig. 3 the leads or connections B are separated within a wooden, boxlike covering in the form of a tube. L provided with separating blocks W. This wooden tube is preferably provided with an outer covering of foil B" or similar conductive material which, may be continuous or in longitudinal sections. The lead cov ering, or covering of wood and foil, or any other suitable covering, effectually serves to electrically shield the leads or connections from the undesired effects. In Fig. 4-, two separate covered leads are shown which may be used instead of a cable.

Owing to the capacity existing in the lead covered cable, which will be somewhat reduced in the wooden covering, it is desirable to provide the tuning means in the form of the ind uctance C- (l' and condensers C", at points in the leads remote fl'Ol'l'l the receiving apparatus and between the coverngs of the leads and the antennae. 'llhis -necessitates some suitable form of remote control for the most convenient operation so that the tuning may be effected from the receiving station. I have not, however, shown actual'electrical connections for such remote control of the tuning means but I have merely indicated the tuning means diagrammatically since controlling connections are common and well understood by those skilled in the art.

I claim and desire to obtain the Letters Patent following:

1. In combination, at a radio receiving station, a plurality of separated antennas, means for receivingsignals While excluding the effects of static disturbances, and c0nnections between the receiving means and the antennae, said connections being electrically shielded from signal waves and static disturbances.

2. In combination, at a radio receiving station, a plurality of antenna: separated from one another by an appreciable fraction of a wave length in the direction of desired reception, receiving apparatus including, means for eliminating the efiects of static disturbances, and leads connecting the re ceivingapparatus with the antennae, said leads being electrically shielded from signal waves and static disturbances.

3. In combination, at a radio receiving station, a plurality of separated antennae, means for receiving signals while excl ding the effects of static disturbances, and connections between the receiving means and the antennae, said connections being provided with coverings for electrically shielding said connections from signal waves and static disturbances.

4:. In combination, at a radio receiving station, a plurality of separated antennae, means for receiving signals while excluding the effects of static disturbances, connections between the receiving means and the antennae, said connections being electrically shielded from signal waves and static disturbances, and tuning means for the antennue located in said connections remote from the receiving means.

In combination, at a radio receiving station, a plurality of separated antennae, means for receiving, signals while excluding the effects of static disturbances, connections between the receiving means and the antennae, said connections being electrically shielded from signal waves'and static dis- 'turbances, and'tuning' means for the an- 1,ase,aea

ductors from the efiects of signal waves and static disturbances. r

7. In combinatiomin apparatus for radio reception, a plurality of antennae separated by an appreciable fraction of a wave length, receiving apparatus at a common receiving station, tuning means local to the antenna: for tuning the antennae to the incoming signal, tuning means for said antennae at the common receiving station, and leads between said tuning means, said leads being shielded against electro-magnetic waves.

- 8 In combination, in apparatus for radio reception, a plurality of antennae separated by an appreciable fraction of a wavelength;

reciving apparatus-at a common receivingstation, and leads connecting said antennae and receiving apparatus, said leads being shielded against elctro-magnetic waves by a grounded conducting inclosure.

In testimony wherof I have signed this specification in the presence of two subscribing witnesses. I

ROY ALEXANDER WEAGANT.

Witnesses:

HERBERT G. OGDEN, 2I. Barnnnonrn-

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