US1912766A - Receiving arrangement with aperiodic directional aerial system - Google Patents

Description

June 6, 1933. A. ESAU 1,912,766

RECEIVING ARRANGEMENT WITH 'APERIODIC DIRECTIONAL AERIAL SYSTEM Filed June 19, 1924 2 Sheets-Sheet 1 \Awwww IIHHAIUIII L ||||l|||l|- I l I l l l l l l L ABRAHAM ESAU l INVENTOR l ATTORNEY I I To Pecan er June 6,1933. A. ESAU 1 9 2,166

RECEIVING ARRANGEMENT WITH APERIODIG DIRECTIONAL AERIAL SYSTEM Filed June '19, 1924 2 Sheets-Sheet 2 INVENTOR ABRAHAM ESAU ATTORNEY V Patented June 6, 1933 ABRAHAM ESAUQ OF BERLIN, GERMANY ASSIGNOR TOTTFLEFUNKENGESELLSCHAFT Fun. DRAHTLOSE T'ELEGRAIPHIE M. B. 11.,

GERMANY v Y 0F BERLIN, GERMANY, A CORPORATION OF.

RECEIVING ARRANGEMENT WITH AJEERIODIC DIRECTIONAL AERIAL SYSTEM Application filed .Tune 19, 1924, Serial No. 720,894, and in Germany J'i1ne 27, 1923.

non-reactive couplings between the aperiodic, aerial system and the recelving circuits tuned for the desired wave lengths. Other objects will be apparent to those skilled in the art from the following description and claims, when considered with the accompanying drawings, in which:

Fig. 1 represents a circuit embodying my invention used for multiplex directional receiving with a loop.

Fig. 2 represents a circuit embodying a different form of my invention withprovision for one-way directlonal receiving...

7 The prior and usual receiving arrange ments for wirelessctelegraphy and telephony which used aperiodic. directional aerials, required meanstocompensate for the reactive effect of one goniometer upon the other. This system required the two tuned circuits of each search coil system to be made exactly equal in inductance, capacity, resistance and mutual inductance. this system lies in the difficulty exactly equalizing the two tuned circuits.

According to the 'present invention one single aerial can be used for simultaneously receiving several wave lengths by connecting the common aerial systemacross non-reactive couplings to several receivers tuned to different frequencies. tion is explained by Fig. '1 which shows such an arrangement. The two cross frame aerials is form the receiving aerialsystem. The incoming oscillations are led in the known way from these frame aerials to the circuits at and 'Z) and from there to several receiving goniometers Z, m, 'n, across several non-reactive coupling arrangements which are marked 0. Coupled to the goniometers are receiving circuits 0, P, Q. As the cross frame aerials 7c and the circuits at and bare aperiodic, they can be used for transferring different frequencies. Disturbing reactions of the receiving circuits tuned to different The disadvantage of The principle of the inven frequencies are eliminated, as the syntoniz 1ng means for the single frequencies are arranged behind the receiving goniometers which are connected to the aerial system across the non-reactive vacuum tube couplings c. The drawings show an arrangement' for multiplex directional receiving."

A wave, therefore, oscillating in the circuit a may be impressed by means of tubes R and R, S and S and by means of the divided goniometer Z onreceiver O. Receiver 0 may be tuned to a different frequency with out affecting receivers P or Q, since nofeedback reaction or detuning effects are produced by coupling thru the valve circuits;

It will be apparent then, that it will be possible to receive a different signal-on any one of the three receiving circuits, for example 0 independently of and without affecting other signals received simultaneously in the indicating circuits P and Q.

If the intention isto attain a unidirectional receiving for the different frequencieseach frameaerial effect'must be combined witha high'aerial effect, that is, for every frequency to be received a special non-directional aeriaLmust be arranged from which the aerial effect is led to the corresponding receiver in order to obtain the required'receiving characteristic for-that frequency.

-' Fig.2 shows an arrangementwhich can be used according to the invention for a simultaneous unidirectional receiving for different 'wave lengths a A and A Every receiving circuit is supplied with an additional non-directional aerial effect, so that a special non-directional or vertical aerial is required for every wave length. As shown by the drawings, theearthed frame aerial A can alsobe used as a vertical aerial for one aerials A A are necessary for the other wavelengths. The aerial effects are led from these aerials across the circuits Ki, K and K to the. receiving circuits 1,2 and 3 reof the wave lengths, but special vertical spectively while the frame aerial effects are transferred by means of a common circuit K and non-regenerative vacuum tube couplings indicated by c tothe corresponding receiving circuits.

Having described my invention what I claim is:

1. In a multiplex directional receiving system, a pair of directional aerials, each being responsive to a plurality of frequencies, plurality of receivers adapted to be tuned to diiierent frequencies and a separate electron valve circuit coupling each of said aerials to, each of said receivers. o

2. In a radio directional receiving apparatus an aperiodic directional aerial,- a coil connected to said aerial, a second coil inductively connected therewith, a plurality of electron tubes, the ends of said second coil being connected, to] the grids of a plurality of pairs of electron tubes, the center of said coil being connected to the filaments of said electron tubes, a plurality of goniometers, the output circuit oi each pair of tubes being connected to opposite ends of a goniometer coil, a source of plate potential applied to the centor of each goniometer coil, and a tuned receiving, circuit connected with the search coil each, goniometer. V a

3, In a radio system, an aerial arrangement comprising a plurality of directional aerials each being responsive to a plurality of iircquencies, a coupling means connected to aerial arrangement, a plurality oi cei vers, adapted to be tuned to difi'erentfrequencies, a plurality ofpairs of electronitubeamplifier circuits for coupling saidaerial arrangement and; said receivers through said couplingmeans, and havingoutput coils, cer-. tain corresponding electrodes of said tubes being. connected to oppositev portions of said coupling means.

4;. In, a rad'o, slgnalling system, an aperie odicdirectignal antenna, a plurality of radio;- gonlipmeters with rotatable search coils, a pluralityofreceivers each connected, with the notatable search coil of a 'goniometer and, adapted; tobe tuned to different frequencies, and a plurality of electron valve amplifier, circuits eachcomprising a doubletube system having input and output oir-cuits each input, circuit being associated with said antenna, and each output circuit being, associated with a radiogcniometer coil and a receiver.

5;,Inia radio signalling system, acrossed; loop aerial. system, a pluralityvof electron valveeir cuits, connected to saidloop aerial, a, plurality of radiogoniometers connected; to said electronvalve circuits each having a pair; of stationary coils and a rotatable coil, a sta tionary coilof eachof said radiogoniometers being connected, through the electron valve circuits. with one of the loops of the aerial and an independently tuned receiving circuit connected, with each rotatable coil of: said edi sen me -i 6. 11;, a radio system, an aerial, arrangement, comprising a, directional antenna responsive to a plurality of frequencies, aiiplu-v rality of receivers adapted to be tuned to ment comprising a directional antenna re-v sponsive to a. plurality of frequenciesand a plurality of individually and independently tunable open antennae, a plurality of receivers adapted to be tuned to difierent frequencies aplurality of electron tube amplifier circuits for coupling said directional antenna to all oi said receivers, a, coupling circuit interposed between each amplifier and each receiver, variable tuning means in each of said coupling circuits, and means for coupling each of said. receiving circuits with one of said open antennae. I

8, An aperiodic frame aerial system, an inductance in series therewith, a plurality of groups of; thermionic tubes, an inductance coupled with said series inductance, conneciQnS respectively between the terminals of said inductance and the controlgrids of the tubes in each, group, a connection between the midpoint of said inductance and the filament off each tube, an output circuit connecting the output electrodes of the tubes in each of said groups, inductive means to couple a receiver to each output circuit, and means to tune said inductive means to signal free q e i 9. n a, radio signalling system, a dlrectional, antenna system responsive, to a Wide band of -frequencies, a plurality of receivers adapted to be tuned to different frequencies, a plurality ofelectron amplifiers each having their inputelements coupled to said-directional antenna, a separate outputcircuit connected with; the outputelements of each of said thermionic amplifiers, separate link circuit interposedbetween each ofsaid output circuits and one of said receivers, means for-tuning said link circuit,-and means for introducing nondirect'i'onal antenna energy in eacli-of-said receiving circuits.

101 In a multiplex: directional? receiving system, adirectional aerial system including alclosedirame aerial, said closediframe aerial forming acapacity; area and av connection between saidraerial and ground,,aplural1ty of thermionic amplifiers each having an input circuit: inductively. coupled to said closed frame. aerial, a plurality ofyreceivers, separate symmetrical; output circuits connected with each of said, thermionic amplifiers, a coupling; circuit interposedi-between each of saidoutput circuits anda' receiver, and tuning; means, in said lastj named circuit.

11; A bilateral i, multiplex receiving system comprising a pair of crossed frame aerials, an inductance connected in series with each of, said' aerials, a=plurality of groups of thermionic tubes, each group comprising pairs ids isv

of thermionic tubes, an inductance coupled to each of said series inductances, means for connecting each terminal of each of said inductances to a grid electrode of a different Q 5 tube in each pair of tubes, a plurality of radiogoniometers each having a field winding connected with the output electrodes of a pair of tubes in each of said groups of tubes,

a search coil connected with each of said radiogoniometers, and a receiver connected with each search coil.

12. A unilateral multiplex receiver comprising a frame aerial, an inductance in series therewith, a connection between said aerial and ground, tuning means comprising an inductance and a variable capacity in said connection, a plurality of receivers, a circuit coupling said last named inductance to one of said receivers, a plurality of nondirec- 2O tional aerials, tuning means in each of said aerials, a circuit for coupling each of said nondirectional aerials to a separate one of said receivers, an inductance coupled to the inductance in said frame aerial, a plurality of pairs of thermionic tubes,a connection between the grid electrode of a tube in each of said pairs and one terminal of said last named inductance, a connection between the grid electrode of the other tube in each of said pairs and the other terminal of said last named inductance, an output circuit for each of said pairs of tubes, a coupling circuit interposed between each of said output circuits and a different one of said receivers, and means for tuning each of said coupling circuits. V

ABRAHAM ESAU.

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