US1791965A - Coupling arrangement - Google Patents

Description

Feb. 10, 1931.

FREQUENLIES F All/0 f M. LATOUR COUPLING ARRANGEMENT Filed Jan. 21, 1925 2 Sheets-Sheet 1 INVENTOR Feb. 10, 1931. M. LATOUR 1,791,965

COUPLING ARRANGEMENT Filed Jan. 21, 1925 2 Sheets-Sheet 2 SOURCE OF FREQUENCIES.

F mvn SOURCE 0F FKEQZ/EA/[IES F AND f INVENTOR Patented Feb. 10, 1931 NI-TED STTES PATENT OFFICE MABIUS LATOUR, OF NEW YORK, N. Y., ASSIGNOR TO LATOUR CORPORATION, OF JERSEY CITY, NEW JERSEY, A CORPORATION OF DELAWARE 'GEMENT Application filed January 21, 1925, Serial No. 3,786, and in France June 22, 1924.

My invention relates to coupling arrangements and particularly to coupling arrangements between the output and input of electron devices in which a plurality of different frequency waves are amplified or detected or both.

One of the principal objects of my invention is the improvement of the inventions disclosed in French Patent #512,295 and addition #21,855-thereto of November 10th, 1916.

Another object of my invention is the incorporation of various features disclosed in the above mentioned patent and in addition thereto in this application.

Other objects and advantages of my invention will be apparent from the following 'description taken in connection with the accompanying drawings in which:

Figure 1 is a schematic diagram of one modification of my invention.

Figure 2 is a schematic diagram of another modification.

Figure 3 is a schematic diagram of another embodiment of my invention.

Figure 4 is a schematic diagram of still another modification.

Figure 5 is a schematic diagram of yet another modification.

Figure 6 is a schematic diagram of still another modification.

.Referring to Figure 1, the'grid-filament circuit of electron device 1 is connected across the source of frequencies F and f. The platefilament circuit of electron device 1 comprises a reactance coil 2 or auto transformer, a reactance coil 3 and a source of power all connected in series and arranged as shown. The upper extremity of reactance coil 2 is connected to the grid of electron device 4 through a coupling condenser 5. A coil 6 is inductively coupled to the coil 3 and has its upper extremity connected to the upper extremity of coil 3 through a condenser 7. The magnetic circuit of coils 3 and 6 preferably comprises magnetic material. The lower extremity of coil 6 is connected to the filament of electron device 4. A discharge resistance A coil 15 is inductively coupled to coil 12, its lower extremity being connected to the lower extremity of coil 12 through a con denser 16. The upper extremity of coil 15 is connected to the filament of electron device 13 as shown.

Referring to Figure 3, the primary winding of coupling devices 20 and 21 are connected across a source of frequency F and are preferably identical. The primary winding of coupling device 22 is connected across a source of frequency f as shown. The magnetic circuit of coupling device 22 preferably comprises magnetic material.

The secondary winding of coupling devices 20, 21 and 22 are all connected in series, the secondary winding of coupling device 22 being interposed between the other two windings. The upper extremity of the secondary winding of coupling device 20 is connected to the control electrode of triode 23 while the lower extremity of the secondary winding of coupling device 21is connected to the control electrode of triode 24. The filamentary cathodes of the triodes are connected in parallel. A connection is made between one of said parallel connections and substantially the midpoint of the secondary winding of coupling device 22.

" The anode-cathode circuit of triode 23- comprises the primary windings of coupling device 25 and preferably 'a half of the primary winding of coupling device 26 and a source of power 27, all connected in series as shown.

The anode-cathode circuit of triode 24 comprises the primary winding of coupling device 27 and preferably the other half of the primary winding of coupling device 26 and a source of power 28.

It is obvious that the above-described system is in eflect a push-pull amplifying system in which two different frequencies are amplified.

Referring to Figure 4 the control-electrode-cathode circuit of triode 30 is connected to the source of frequencies F and f. The anodecathode circuit of triode 30 comprises a reactance coil or auto-transformer 31, a reactance coil or auto-transformer 32 and a source of power 33, all connected in series and arranged as shown. Coil 31 is for the higher frequency F while coil 32 is for the lower frequency f. The magnetic circuit of coil 32 preferably comprises magnetic material.

The upper extremity of coil 31 is connected to the control electrode of electron device 34 through a condenser 36 as shown. A discharge resistance 37 is connected as shown. The cathode of triode 34 is connected to the terminal of the source of power 33.

Referring to Figure 5, the control-electrode-cathode circuit of triode 40 is connected across the source of frequencies F and f as shown. The anode-cathode circuit of triode 40 comprises a coil 41 for the lower frequency f, a coil 42 for the higher frequency F, and a source of power 43 all connected in series and arranged as shown. The upper extremity of coil 41 is connected to the upper extremity of coil 44, the lower extremity of coil 44 being connected to the control electrode of electron device 45 through the condenser 46. The coil 44 is inductively coupled to the coil 41, the magnetic circuit of said coils preferably comprising magnetic material.

The upper extremity of coil 47 is connected to the upper extremity of coil 42 through condenser 48, the two coils being inductively coupled. The lower extremity of coil 47 is also connected to the control electrode of electron device 45 through the condenser 46. Attention is also called to the-fact that the device comprising coils 41 and 44 should be so insulated and arranged as to substantially prevent any capacity coupling between said device and the source of power 43.

Referring to Figure 6, the control-electrode-cathode circuit of triode 50 is connected to the source of frequencies F and f. The anode-cathode circuit of triode 50 comprises a coil 51 for the higher frequency F, a condenser 52 and a source of power 53 all connected in series and arranged as shown.

The upper extremity of coil 51 is connected to the control electrode of triode 54 through a condenser 55. A shunt circuit comprising reactance coil 56 and the primary winding of transformer 57 is connected across the upper extremity of coil 51 and the lower plate element of the condenser 52. The secondary winding oftransformer 57 is connected to the control-electrode-cathode circuit of triode 54 through the reactance coil 58. The transformer 57 preferably comprises a magnetic circuit of magnetic material.

In all of the above-mentioned systems the frequencies F and f are supposed to represent comparatively high and comparatively low frequencies, respectively. However it is to be understood that these frequencies may be close enough together if desired to insure the successful operation of the various systems.

\Vhile I have shown and described various preferred modifications of my invention, I do not limit myself to the same; but may employ such other modifications as come within the spirit and scope of my invention.

I claim:

1. In combination, a first electron device comprising an anode, a cathode and a control electrode, a second electron device also comprising a cathode, an anode and a control electrode, a source of different frequencies, means for connecting the control electrode and cathode of said first electron device across said source of different frequencies, a plurality of reactance coils connected in series across the anode and cathode of said first electron device, a connection from the upper terminal of one of said coils to the control electrode of said second electron device, a secondary coil inductively related with the other of said coils, a connection from one extremity of said secondary coil to a terminal of said other coil, and a connection from the other extremity of said secondary coil to the cathode of said second electron device.

, 2.'In combination, a first electron device comprising an anode, a cathode, and a control electrode, a second electron device also comprising an anode, a cathode, and a 0011 trol electrode, a source of high and lower frequencies, means for connecting the control electrode and cathode of said first electron device across said source of frequencies, a plurality of reactance coils, one of which is operative at high frequencies and the other at lower frequencies, connected in series across the anode and cathode of said first electron device, a connection from the highvoltage terminal of said high-frequency.

coil thru a capacity to the control electrode of said second electron device, a secondary coil inductively coupled to said coil operable at said lower frequencies, a connection from one extremity of said secondary coil to a point intermediate said two first-mentioned reactance coils, and a connection from the other extremity of said secondary coil to the cathode of said second electron device.

MARIUS LATOUR.

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