US1994628A - Disturbance eliminator for radioreceivers - Google Patents

Description

Ma -ch 119,, 1935. W L LQQ4Z$ DISTURBANCE ELIMINATOR FOR RADIORECEIVERS Filed April 22, 1953 2 Sheets-Sheet l I n venior WM??? W WaZZa/we m M Q g r Attorney March 19 1935. w. w. WALLACE DISTURBANCE ELIMINATOR FOR RADIORECEIVERS Fild April 22, 1955 2 Sheets-Sheet '2 iwwwwwmmm TI.

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Patented Mar. 19, 1935 testis p 9 53 mammal: ELlIMINATOR Fon i RADIORECEIVERS Walter W. Wallace; Frederick, Md assignor to Sherman B. Bowers, Frederick, Md.

Application April 22, 193s, Serial ndcemsz 1 Claims (Cl. 250-20) This invention appertains to new anduseful improvements in disturbance eliminators for radio receivers. The so-cal1ed 'fstatic which forms the main disturbance in radio receivers is believed to be due to the high amperage of the transmitted. energy,-which tends to produce a disturbance in the transmitted wave and results in a distortion thereof, when both the wave and the disturbance are admitted to the receiver, tending to produce infidelity in reproduction.

Ihe principal object of this invention is to eliminate this distorted energy by diverting the same to ground prior to its reception by the receiver.

Another important object of the invention is to divert distorted energy or electrical disturbances accompanying transmitted waves by di-' verting the same to ground before they reach the receiver without decreasing the volume of the acceptable wave.

Other important objects and advantages of the invention will become apparent to the reader of the following specification.

In the drawings:-

Figure 1 represents a diagrammatic view disclosing the connections between the electrical devices involved.

Figure 2 is a side elevational-View of the magnetic coil.

Figure 3 represents a cross sectional view through the magnetic coil.

Figure 4 representsa view in perspective showing several of the elements of one of the condensers spaced apart and in the transposed relation'with respect to each other as intended.

Figure 5 represents a longitudinal sectional view through the twenty-eight plate unit.

Figure 6 represents a perspective View of one of the plates of the said unit.

Figure '7 is a sectional View through one of the spherically wound coils.

Referring to the drawings wherein like nu merals. designate like parts, it can be seen that there are two static dissipating units employed, which are shown in Figure 1 and designated by numerals 5 and 6. Each of these units is constructed of a plurality of plates 7, each being substantially E-shaped and adapted to be arranged alternately in the inverted position shown in Figure 4, to secure the'desired transposition of energy.

The outer leg portions of each of the elements '7 are wound with the conductor 8 and all of the elements are connected together in series, as substantially shown in Figure 4. These conductor paraffin or some other similar material so that the elements are maintained properly spaced from each other'at all times.

1 Inner legs ortongues 10 of these elements 7 are not; wound as are the. outer legs and assume the alternate oppositely directed position with respect to each other, as is apparent in Figure 5. It is preferable that the unit 5 be built up of more elements than the unit 6 and by way of distinction herein, the unit 5 has been shown made up of twenty-eight elements or fourteen transpositions, whereas the unit 6 is built up of twentysix elements or thirteen transpositions.

The e1ectro-magnet generally referred to by numeral 11, comprises the core 12 and the winding 13. At each side of the electro-magnet 11 is a spherically wound mass of conductive material generally referred to by numeral 14, one end of each mass 14 being connected to one end of the winding 13. Each of these masses acts in the nature of a load coil effecting a reactance which cuts down the amperage on the approach side of the magnet so as to cause the loss of the undesired or high potential energy, while the magnet serves when excited to attract the current from the approach load coil 14 and to repel it through the load coil 14 on the grounded side of themagnet.

In practice, it is preferable that these electrical devices be mounted in a casing or suitable receptacle whereon binding posts 15 and 16 are located. A connection may be made from the last mentioned conductor 16 and a suitable ground connection may be made to the binding post 15 to ground. I

The antenna lead-in is denoted by numeral 17 and connected to the binding post 16, whereas the connection 18 is made between the binding post 16 and one end of the winding 8 on the unit 5.

A connection 19 is also shown at the other side of the winding of the unit 5, and the remaining end of the unit 6. A tap 20 is taken from the connection 19 and leads to the contact 21, while a second contact 22 is connected to the four sides of the unit 23 by a wire 26.

It will also be seen that a binding post 24 is provided and that this binding post 24 is connected by the conductor 25 with the last mentioned side of the unit 6. Suitable connection may be made between the usual aerial posts on the receiver and the said binding post 24.

The ground post on the receiver is connected by the wire 26 to a switch arm 27 on the conwound elements are embedded a mass9 of q tainer for the receptacle (not shown). This switch 27 may be engaged with either the contact 21 or the contact 22, for cutting in one or both of the condensers 5 and 6.

It can be seen that when the blade 27 is on either the contact 16 or the contact 21, the radio waves with static current will flow from the antenna lead-in wire 17 through either the wire 18 or wire 20 to the static dissipating unit. If the blade 27 is on the contact 21, only one of the units will be cut into the system, whereas both units will be out in if the blade 27 is on the contact 16. The radio waves in having practically no current value, will follow the coiled conductor 8 on the legs of the plates 7.

However, due to the amperage of the static current, this current will leave the coiled wire 8 and follow the path of least resistance by traveling along the plate 7. This transposition of the conductors carrying the incoming energy will serve to dissipate the undesired interference energy by grounding the same through the plates 7 and wire 25. Thus the units 5 and 6 serve as interference eliminating means. In this transposition of the wave, certain undesired currents are eliminated, however, other undesired currentshaving more afiinity for the desired currents than those eliminated in the above transposition step, areeliminated by reducing the amperage of the current in passing the same through the load coils 14, which serve to collect and release the current by the excitation of the magnet involving the coil 13 and core 12.

While the foregoing specification sets forth series, one side of the unit being connected to the usual antenna, a pair of load coils interposed between the -unit at its opposite side and ground and being'connected in series, and a magnet'connected in series between the said load coils.

WALTER W. WALLACE.

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