US1838434A - Static eliminator for radioreceivers - Google Patents

Description

Dec. 29, 1931. G. s. MOORE STATIC ELIMINATOR FOR RADIORECEIVERS Filed July 12, 1930 QR N Em mm mm F NM QR Mm m Illllllll mmkuvim Patented Dec. 29, 1931 UNITED STATES GILES S. MOORE, OF INDIANAPOLIS, INDIANA STATIC ELIMINATOR ron nnnronncnivnns Application filed July 12, 1930. Serial No. 467,547.

This invention relates to radio aerials and particularly to means for eliminating static in radio receiving sets.

An object of the invention therefore is to provide means for eliminating static and other noises incident to the operation of radio sets.

A further object is to provide a device which will not only eliminate static but which will increase the efi'ective reception powers of the radio receiver without in anyway reducing or cutting out the messages which are desired to be heard.

Referring to the accompanying drawing 15 which is made a part hereof and on which similar reference characters indicate similar parts,

The figure is a diagrammatic view illustrating the various elements and hook-ups 2o constituting my invention.

In order that the description may be more easily followed it will be basedon the theory that the energy enters the set at one side and comes out through the other side by way of reproduced sound waves, the description attempting only partially to follow the course of the sound impulses in the form of electric waves as they go through the device.

Numeral indicates a lead line from a :2.) source of electric energy such as a battery,

house current or a generator. This line is attached to a coil 11 which in the absence of a better term will be described as a kicking" coil for the reason that the current entering 5.:- through the coil is believed to be, in a sense, broken up by the coil. A wire 12 leads from this coil to one of two steel magnet bars 13. A wire 15 attached to the other steel magnet bar 14 passes around the positive and negative holes of a horseshoe magnet 16. The kicking coil 11 consists of a core 17 into which are attached wires 18, 19, 20 and 21, these wires being wound a number of times around the core 17 and attachedto the wire 12. The wire 15 is attached to a commonground wire 22. A wire 23 is attached to the end of the magnet steel bar 13 opposite the end to which the wire 12 is connected and is connected at its other end to one end of a non-magnetized steel bar 24 which is positioned adjacent the north and south poles of the horseshoe magnet 16'.- A wire 25 is attached also to the non-magnetized bar 24 and connected to a binding post 26 on a switch 27. When the switch27 is in the position in which it is shown in the figure, current may pass from the wire 25 to a wire 28. The wire 28 is connected in series through a number of cups 29, 30, 31, 32, and 33. The cup 29 is filled, or partially filled,

with oil, the cup 30 with graphite, cup 31 with slacked lime, cup 32 with sulphuric acid and cup 33 with vinegar. In the cup 29 wire 28 passes around a pair of cores 34 and 35. Similar cores 36 and 37 are positioned in the cup 32 and single cores 38 are positioned in the cups 31 and 33. In the cup 30 the wire 28 is" connected in series through the contents of the cup, such contents being graphite. From passing around the core38 the wire '28 connects to abinding post 39 on a switch 40.- A wire 41 on one arm of the switch 40 is at tached to one end of a'magnetized bar 42 to the other end of which is attached a wire 43 leading to. the radio receiver. The common ground'wire 22 is attached to one end of a magnetized steel bar 44. A wire 45 is attached to a binding post 46 on the switch27 and this wire passes around the cups 29 to 33 inclusive and is attached to a'binding post 47 g on the switch 40. When the double pole v switches 27 and 40 are turned so that the ele ments 48 and 49 of the switch contact with binding posts 46 and 50 respectively and elements 51 and 52 contact with binding posts 47 and 53, circuit is completed from the wire 25 through the wire 45, wires 41, bar 42 and wire 43 to the radio receiver without passing through the contents of the cups. A wire 54 is attached to another kicking coil 55, the I construction of which is the same as kicking 9O coil 11' described in detail above. A wire 56 leads from this coil to a magnetized: steel bar 57.; A wire 58 connects the other end of this bar with a magnetized steel bar 59. Bar 59 is connected by means of wire 60 with binding posts 61 on the switch 27. Another magnetized steel bar 62 is positioned adjacent the bar 57 and is connectedby means of wire 63 with a magnetized steel bar 64. A wire 65 is connected with the other end of the magthe switch with a wire 74 which wire connects to a coil 75 within the cup 69. A wire 76 passes from one of these coils and extends into the body of graphite in the cup 70. A wire 77 connects the contents of the cup 70 with a coil in the cup 71, a wire 78 having one end connected to the coil in the cup 71 connects through coils 79in the cup 80, and coil 81 in the cup-82 to a post upon the switch 40.

When the switch 40 is in the position shown in the figure, the arm 52 makes connection between the wire 83 and a wire 84 which latter wire is attached to a non-magnetized steel bar 85. A wire 86 is attached to this bar at 7 one end and at its other end is attached to the radio receiver. A wire 87 is attached to the post 50 on the switch 27 at one end and is attached at its other end to the post 53 on the switch 40. When the switches 27 and 40 are turned to the position opposite to that in which they are shown in the figure, wire 60 connects through wire 87 directly with the wire 84 without passing through the cups 69, 70, .71, and 82 respectively. A wire 88 is connected at one end to the aerial wire and at the other to a kicking coil 89. This kicking coil is similar in all respects to that shown at 11, which has been described in de tail. A wire 90 leads from the kicking coil 89 to a magnetized steel bar 91. The other end of this bar is connected through wire 92 with a non-magnetized steel bar 93 which latter bar is positioned adjacent the poles of a horseshoe magnet 94. A wire 95 leads from the other end of the bar 93 to a binding post 96 on switch 97; When the arm 98 of this switch 'is in the position of the figure the circuit is closed with a wire 99. The wire 99 is connected with a coil 100 in a cup 101. A wire 102 passes from the coil 100 and extends into a cup 103. A wire 104 has one end in cup 103 and its other end attached to a coil in cup 105 and a wire 106 has one end attached to coil in cup 105 and its other end in cup 107.v Wire 108, having one end in the cup 107, is connected at its other'end to a coil 109v in a cup 110. :The cups 101, 103, 105,107 and 109 containing oil, graphite, slacked lime, mercury and vinegar respectively. The wire 111 connects at one end with the coil 109 and at its other end to a post 112 on aswitch 113. P0- sitioned adjacent the bar 91 is another magnetized steel bar 114. A wire 115 is attached tothis bar and; toe coil passing around the positive and negative poles of horseshoe magnet 94. A wire 116 passes from the coil around the poles of the'magnet and terminates in a magnetized steel bar 117. Wires 118 and 120 are attached to the wire 116 and to the sides of the cups 101 and 105 respectively. Wires 119, 121 are connected to grids or plates 122 and 123 within the cups 103 and y with a magnetized steel bar 126. A wire 127 connects the bar 126 with the radio receiver. When the switches 97 and 113 are in position shown circuit passes from the line 95 in series with the contents of the cups 101, 103, 105, 107, and 109 to the radio receiver. When it is desired to by-pass these cups switches 97 and 113 are turned to the opposite position when thecurrent passes from the wire 95 through the wire 128 and wire direct to the radio receiver. Power lines 10 and 54 may receive their current from any suitable source such as A batteries and B batteries or other suitable source of current.

Numerous tests with this device have convinced me of the fact that not only is static eliminated almost entirely but other objectionable noise incident to the operation oi many radio receivers are either reduced or entirely eliminated. The theory on which it is believed the device operates is as follows:

The kicking coils are thought to interrupt all foreign elements in the current until they are unableto operate eifectively to produce objectionable noises. Steel magnet bars due to theirhigh resistance characteristics remove from the circuit certain impulses that normally would pass to the radio receiver. The magnetic steel bars deliver to the magnet 16 any and all excess current. The poles of the magnet 16 are grounded through wire 15. When the current is required to go through liquid and other contents of the cups it is filtered so to speak. The coil windings in the oil cup 29 increase the voltage incasestatic 2' is upon the circuit or ground. The oil carries the static through the ground wire 22; graphite in the cup 30 carries the current from one contact to the other. Wiring 22 extends into the graphite and so carries any foreign energy from this cup to the ground. Slacked lime in the cup 31 filters the current and likewise carries impurities t'rom the cup into the ground wire 22. The current then passes into the cup 32 containing sulphuric acid. In this cupis a coil to increase the current. From where the current passes into the cup in which there is a coil winding submerged in vinegar which increases the voltage above the sulphuric acidand the horseshoe magnet.

The switch 40 may be thrown to by-pass the cups just described. The steel magnet bar functions to remove all objectionable characteristics of the current before entering the radio receiver into the groundwire 22. It

should be noted that all light circuits possess two wires. The chemicals in the two series of cups 29 to 33 inclusive and 69, 7 O, 71', and 82 contain the same elements. When the operator desires to eliminate the cups he may do so by switching the double-throw switches to the opposite contacts when the device functions as an ordinary aerial- The aerial is connected through a kicking coil ust as are the power lines.

I provide for grounding the radio receiver 128 either to the earth through a wire 129 or to a glass container 130 through wire 132. The container 180 is filled with earth, scraps of iron, steel and copper. A switch 131 provides for connecting the radio receiver through wire 132 to the container 130 or through wire 129 with the earth. By using the ground 180 objectionable electrical disturbances are avoided, such as are found when the radio receiver is connected to the earth. It frequently happens that aerials are struck by lightning resulting in damage not only to the radio set, but to the house as well. When the radio set is grounded in the container as described, the danger from lightning is reduced to considerable extent.

It will be obvious to those skilled in the art that various changes may be made in my device without departing from the spirit of the invention and therefore I do not limit myself to what is shown in the drawing and described in the specification, but only as indicated in the appended claims.

Having thus fully described my said invention, what I claim as new and desire to secure by Letters Patent, is:

1. A static eliminator for radio aerials comprising in combination with the aerial,

a series of high resistance elements connected between the aerial and the radio receiver, saidresistance elements consisting of magnetized steel bars, and a plurality of cups connected in series with the said bars, said cups containing high resistance material,sub stantially as set forth.

2. A static eliminator for radio aerials comprising in combination with the aerial, a series of high resistance elements connected between the aerial and the radio receiver, said resistance elements consisting of magnetized steel bars, a plurality of cups connected in series with the said. bars, said cups containing high resistance material, and a switch for bypassing said cups, substantially as set forth.

3. A static eliminator for radio aerials comprising in combination with the aerial, a plurality of cups containing oil, graphite, slacked lime, sulphuric acid and vinegar, the

contents of said cups being connected in 'se-- ries between the aerial and the radio receiver, substantially as set forth.

i. A static eliminator for radio aerials comprising in combination with the aerial,

a plurality of cups containing oil, graphite, slacked lime, sulphuric acid and vinegar, the contents of said cups'being connected in se ries between the aerial and the radio receiver, and a switch for bypassing said cups, subtantially as set forth. 7

5. A static eliminator for radio aerials comprising a group of cups connected in series with the aerial and radio receiver, some of said cups containing oil, graphite, slacked lime, mercury and vinegar, the contents of these cups being connectedin series with the aerial and the radio receiver, substantially as set forth.

6. A static eliminator for radio aerials comprising a group of cups connected in series with the aerial and radio receiver, some of said cups containing oil, graphite, slacked lime, mercury and Vinegar, the contentsof these cups being connected in series with the aerial and the radio receiver, and a switch for bypassing said cups, substantially as set forth. r

7 A static eliminator for radio aerials comprising a plurality of coils, each connected respectively to the power lines of the radio receiver and to the aerial, a'plurality of magnetized steel bars connected in series with the coils, some of said bars being connected 1 in series with coilsaround the poles of horseshoe magnets, a plurality of cups containing oil, graphite, slacked lime, sulphuric acid and vinegar, the contents of said cups being connected in series with the Said coils on said horseshoe magnets, said coils'and the contents of the said cups functioning to eliminate static chargespassing to the radio receiver,

substantially as set forth.

8; A static eliminator for radio aerials comprising two series of cups each series containing oil, graphite, slack-ed lime, sulphuric acid and Vinegar, a plurality of coils connected at one end respectively to power lines to the radio receiver and to the aerial, a plurality of magnetized steel bars, one of each bars being connected to each of the coils at one end, a pair of non-magnetized steel bars positioned adjacent the poles of a horseshoe magnet, said bars being connected in series with the first-named magnetized steel bars, said nonmagnetized bars being connected in series with the said cups, and the said cups being connected in series with the feed line to a radio receiver, a third series of cups containing oil, graphite, slacked lime, mercury and vinegar, said series of cups being connected in series through magnetized steel bars with "an aerial at one end and with a radio receiver

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