US1732607A

US1732607A - Disturbance eliminator

Info

Publication number: US1732607A
Application number: US628677A
Authority: US
Inventors: Kulebakin Victor
Original assignee: Individual
Current assignee: Individual
Priority date: 1922-07-25
Filing date: 1923-03-29
Publication date: 1929-10-22
Anticipated expiration: 1946-10-22

Description

Oct. 22, 1929. KULEBAKIN `1,732,607

DISTURBANE'ELIMINATOR Filed March 29, 1925 .In ven 201' Patenta& Oct. 22, 1929 ,STATES mure vicroa KULEB KI ore Moscow, RUSSIA ISTURBANE ELIMINATOR Application filed March 29, 1923, Serial No. 628,@7'7, and in Russia July 25 1922.

The reception of wireless telegraphic and telephonic reports is influenced on arcraft, apart from other considerations, mainly by two factors, viz.

1. By the external noises, which are produced by the working motors, the rotation of the air screws, the vibration of the bracing wires, etc.

2. By the disturbing action of the system 10 which serves for' the ignition of the combustible mixture in the motors and consists of high tension magnetos or other apparatus, plugs and conductors. i

For-,the purpose of protecting this wireless telegraphie and telephonic reception from external noises special helmets with ear fiaps, which lie close against the head and ears, also special so called internal telephones are used, these letter being inserted in the external auditory passage. This enables the efiect of thesecondary noises of the working motors .to be kept away from the sounds to be received. Nevertheless the disturbing effect of these secondary noises is very great. For this reason the calls and messages to be picked up must be suiciently powerful' to enable the receiver on the aircraft to pick them up accurately 'and therefore it is necessary to intensify them.

To overcome the disturbing action of the electrical ignition apparatus system of air craft, entirely diflterent means are necessary, as the disturbng effect is due partly to magnetic incluction butmainly to the radiation of 'the magnetic waves in the formation of the spark at the plug during ignition.

The present invention is based on the consideration that it is not so very important to screen ofl the receving apparatus or protect it in the same way, but what should be done is to weaken the radiation of the electro-magnetic energy of the ignition system considerably during the formation of the s ark.

This is eflected according to the present invention by the use of conduetors which possess a great ohmic resistance f. i. 1,000,000

ohms) uniformly distributed over i ts whole length, by which the ignition apparatus is connected to the motor. The damping resistance must be in the circuit to be damped. But this circuit is not quite fixed, for the reason 'that the capacity of the ignition current lines with relation to the metallic mass of the' motor is distributed over the whole length. Therefore, the clamping resistanceof each line must also be distributed over its whole length. Such conductors may consist of thin conductors of metallic alloys of great ohmic resistance; By using conductors with a great eo ohmic resistance the degree of damping of the oscillations produced when the spark is formed can be considerably' increased and in this way the, electro-magnetic energy which is to he eliminated can be also reduced. In the drawings, Figur-e 1 showsa con-` structional example of the invention illustrating a six cylinder motor with a corre sponding ignition apparatus. Figure 2 discloses a portion of 'a chain c'onductor'in ac-` cordance with this invention; Fig.` 3 is a diagrammatic showing of the equivalent electrical eflects of the use of an `oxidizedchain conductor in the ignition circuit. a

The following is a statement of the theory of' operation which is believed to be correctz--` The action of'a continuous 'conduc'torof 'about 'one million' ohms can be'furthe` increased, when the conductor is replaced by'an oXidized chain.- The resistance characteris tic of such a chain'isa totally different one from that of a continuous conductor. An oxidized chain conductor constitutes 5 the equivalent of and has the same effect as a net work of condensers, self-inductors and resistances, as shown diagrammatically 'by The contact surfaces of chain links present on account of their oxidation not only a high resistance R, but have also a Capacity action," as indicated diagrammatically by reference characters K in 'Fig..3 of the drawingshThe' chain linksalsoeonstitutesmall 'self induc ters, which isi `shown diagrammatically by reference characters' L in Fig. 3 ofthe drawr ings. These links together with the metallic'* motor mass, constitute'small condensers I which are schematically illustrated in Fig. 3 by reference character C. Such a chain,.

therefore, forms a great number of oscillation circuits, which serve to dampen the ignition spark itself after its inception; These inductances and capacities are of small value and make the frequency of the ignition circuit so high that it varies considerably from the frequencies of the radio receiving circuits, and, therefore, does not disturb or interfere with proper reception. The action of the invention is increased if the external metallic parts of the plugs and the motor casing are connected to the ignition apparatus by good conductors at certain points, as shewn in the drawing. A connection of this kind has given a still better working.

In Figure 1 the dotted conductors (a) are intended to denote chains of iron with an oxidized outer surface or other conductors with great resistance uniformly or intermittently distributed over its whole length, which chains are diagrammatically indicated in Fig. 2. b is the connection ot' the external metallic parts of the plugs to the ignition apparatus and c the conductor for connecting certain points of the motor casing to each other and to the ignition apparatus. This is for preventing the occurrence of any electrostatic potentials.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is: i

1. Means associated with the electric ignition system of an internal combustion engine for preventing any oscillations likely to interfere with radio reception, comprising conductors in said ignition system each having an ohmic resistance of about one million ohms distributed throughout its length, each conductor comprising a relatively large number of parts loosely engaging one another.

2. Means associated with the electric ignition system of an internal combustion engine for preventing any oscillations likely to interfere with radio reception, comprising connections' in said ignition system having an` ohmc resistance of about one million ohms distributed throughout their lengths,

said resistance consisting of a chain composed tem generating disruptive discharges for preventing oscillations likely to interfere with` radio reception,comprising a conductor consisting of a relatively large number of elements inter-engaging with one another, the outer surfaces of each of said elements being coated with a compound containing an electrically conductive substance.

In testimony that I claim the foregoing as my invention, I have signed my name.

VICTOR KULBAKIN.

of metallic links the outer surfaces of which are oxidized.v

3. Means associated with an electric s stem generating disruptive discharges or preventing any oscillations likely to inter- 'ere with radio reception comprising a conductor consistingvof a plurality of distinct, loosely connected elements, the outer surface's of which are oxidized.

4. Means associated with an electric sys-