US2688714A - Distributor for multicylinder internal-combustion engines - Google Patents

Description

p 7, 1 A. BUCHMANN DISTRIBUTOR FOR MULTICYLINDER' INTERNAL-COMBUSTION ENGINES Filed May 13, 1952 \NvEHToR ALBIN BUCHMANN BYI Patented Sept. 7, 1954 emrso;

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DISTRIBUTOR EORrMULTICYLINDER INTERNAL.- COMBUSTI'ONIENGINES f.

AlbimBiiclimann, Soleure, Switzerland, assignorw toiScintilla Ltd.', Soleure;-:Switzerland .1:

Al pli ationMay 13,1.1952, SeriaLNo. 7287,6311 L Claims priority-'yapplicatioir Switzerland May 19, 1951 1 Various; devices. have'tbeen provided' 1101' zpre+- venting- ..interference in 5 radio and television" re=i ceptio'n E which is .causednby unscreened :ignition'. systems of motor vehicles: These .dBVlCBSTigSH-J" erally *take theform of high-i-ohmici resistors" which are connecte'd to -the-leads of the: spark plugs" of the engines Themountingraof' suppress sors of this type-is quite complicated .and'*ex'-" pensive because the numbenot suppressors'mustequal the number of .spark plugs and becauseit: is necessary to cut each lead-to each=spark plug and connect the'thus-formed lead-ends of eachleadto the terminals of a support which carries a suppressorelement.

One "of the objects of the present'invention isto overcome allof the above disadvantages:

An additional objectof' thepresent invention is to provide a means-for supporting: a single suppressor to beusedsuccessively' with each spark plug .as'ithe' latter are fired.

A'furtherobject of the present invention isto provide a"'rotor;fcr-' the distributor of'an'internal combustion engine, which-"is capable of supporting therein a suppressor which-may be successively located in thecircuits of the several sparkplugs; as the latter are fired;

A 'stillfurther object of the present invention is to enable a suppressor of the above type to be cooled during operation'of the engine-- Yet another object of the presentinvention-is to mount-ya suppressor in a distributor rotor in sucha way that balanced centrifugalforcesare set upduring turning of the rotor.

The objects of'the present-invention also include the provision of a distributorrotor which isof a relatively simple construction and capable--- of having'a suppressor easily attached to and removed therefrom.

Withthe above objects in view; the present invention mainly consistsofadistributor rotor having a body of electrically non-conductive' material'adapted tobe rotatably mounted on-thedistributor and being formed with a freespace; A- first electrical conductor, adapted *to receive current froma sourceof electricity; is oon-nected to this body for rotation therewith' and has-a portion locatedin said "'freespa'ce f said body.

A second electrical conductor-is connectedto'said ada-ptedatocsuccessively pass-by the points 5 durbody for rotation'therewitlrand also *has aportion located in said free space of said body. This ductor and is adaptedto'-successive1y* contact the== 2. located xinr this free space.- and electrically1,'con1 nected towthe;above-mentioned first and second I conductors-pthe ssuppressor will comp1ete -a circuit: through these-conductorsand.will be-suc- 1 cessively associated-with each of .the spark plugs as-thevlatter are fired, to' prevent interference. iniradio andtelevision reception. The free-space in which the; suppressor. is located :passes through then rotor body and is located about an intermediate portion of the suppressor so-as to cause air: to 1 pass: over i the same; during operation of thez-.engine,-.tocool the-suppressor. The sup pressor is-mounted in the-rotor'body in a sym metricahposition withrespect to the axis of ro- =tation ofthe. rotor body so as to prevent the creation. of unbalanced centrifugal forces;-

The novel features which are" considered .315 characteristic i for the invention are set forth I in particular "in-the. appended claims. The invention-itself;- however,-both asto its construction and its method of operation, together with tadditional obj ectsand advantagesthereof will be best understood from: the 'followingdescription; ofspecific embodiments .when read in connection with the accompanying drawings, in which:.

Figcl is-aacentral; elevational. sectional view through a rotor constructedin accordance with thepresent invention and 1 taken along line- I-I of Fig. 2-; and

Fig.2 is-a sectional plan view ofthe' structure of Fig. :1-taken along-lineII--II: of Fig. 1.

Referring now to the drawings," there is shown in .Fig. 11 a rotor having an electrically non-con-- ductivebody-i I adapted to. be mounted on I a dis- 7 tributorfor rotationabout theaxis 3.. The body.

I has :a bottom --recess "2 provided :witha-key-' way and adapted to receive apart of the distributor whichais' rotated so that the rotorbody I will be positively rotated aboutthe axis3.;

An electricaleonductor' l, leading'from a source a of electricity such 1 asthe battery of theivehicle. contacts an L-shaped electrical .cooductori-fi which 3 is partly embedded in the rotor body' 'I with one."- arm: of: the: electricalv conductor 6 being: normal ;,-to and-intersecting the axis of rotation 3 and:-

theothenarnr ofthe electricalconductorfi being- 1 parallel -t0.- the axis of "rotation 3.

A -second L'rShHFPBdelectrical conductor 1 also is partly embedded in the -rotor body- 1 and-is inggrotation -nofi therotor: body 'I one. of these-w pointstc5 being.adiagrammatically; illustrated in Fig. '2' in :associationcwith ithe conductor 1;. parts" of ':which iSP-ShDWII- lDi-idOtIdfllShSi1lHeS33inTFig;'-. 2;.-

3 axis of rotation 3 and another leg parallel to this axis.

The rotor body I is formed with a bore 9 having an axis 8 extending in a direction normal to and intersecting the axis of rotation 3. A part of the conductor I extends across this bore 9 and a part of the conductor 6 is located at an end of the bore 9. The bore 9 is threaded at the part thereof adjacent to the conductor I, and the latter is formed with a threaded opening forming a continuation of the threaded part of bore 9 so that a plug I I, which is electrically conductive, may be threadedly mounted in the bore 9 and extend across the threaded opening of conductor I.

The bore 9 is adapted to receive the cylindrical suppressor In which is a high-ohmic resistor and bears at one end against the conductor Ii to be electrically connected thereto. Suppressor ID bears at its other end against the plug I I, the latter serving to maintain the suppressor II) in a fixed position on the rotor body I. The parts are designed so that the cylindrical suppressor II] is symmetrically located with respect to the axis of rotation 3 to prevent unbalanced centrifugal forces during rotation of the rotor. The plug I I is hollow and carries therein a spring I2 which bears against the suppressor In to prevent any variations in the location of the latter due to vibrations which may be set up during operation of the distributor.

The rotor body I is provided with a transverse opening I3 forming together with the bore 9 a free space in which the suppressor I is located. This transverse opening I3 is located about an intermediate part of the suppressor I0, extends in a direction normal to the axis of rotation 3 and axis 8 of bore 9 and passes completely through the rotor body I so as to provide an air passage which causes air to pass over the suppressor I0 during rotation of rotor body I to cool the suppressor. It will be noted that the suppressor is in contact with the rotor body I only at relatively small opposite end portions of the suppressor so that the latter is cooled over almost the entire length thereof.

It will be understood that each of the elements described above, or two or more together, may also find a useful application in other types of distributors for multicylinder internal combustion engines differing from the types described above.

While the invention has been illustrated and described as embodied in distributor rotors for multi-cylinder internal combustion engines, it is not intended to be limited to the details shown, since various modifications and structural changes may be made without departing in any way from the spirit of the present invention.

Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can by applying current knowledge readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention and, therefore, such adaptations should and are intended to be comprehended within the meaning and range of equivalence of the following claims.

What is claimed as new and desired to be secured by Letters Patent is:

1. A rotor for an ignition distributor to be used in a multi-cylinder internal combustion engine, said rotor comprising, in combination, a body of electrically non-conductive material adapted to be rotatably mounted on the distributor for rotation about a predetermined axis and being formed with a free space extending all the way through said body and across said axis; a first electrical conductor adapted to receive current from a source of electricity, being connected to said body for rotation therewith, and having a portion located adjacent said free space on one side of said axis; and a second electrical conductor connected to said body for rotation therewith, being spaced from said first conductor, and also having a portion located adjacent said free space of said body on an opposite side of said axis, said second conductor being adapted to successively contact the points of the distributor, whereby an electrically conductive suppressor, for preventing interference to radio and television reception, may be located in said free space of said body, extending across said space, and electrically connected to said conductors to complete a circuit through the same.

2. A rotor for an ignition distributor to be used in a multi-cylinder internal combustion engine, said rotor comprising, in combination, a. body of electrically non-conductive material adapted to be rotatably mounted on the distributor for rotation about a predetermined axis and being formed with a free space extending all the way through said body and across said axis, said free space being substantially symmetrical with respect to said axis; a first electrical conductor adapted to receive current from a source of electricity, being connected to said body for rotation therewith, and having a portion parallel to said axis and located adjacent said free space on one side of said axis; and a second electrical conductor connected to said body for rotation therewith, being spaced from said first conductor, and also having a portion parallel to said axis and located adjacent said free space of said body on an opposite side of said axis, said second conductor being adapted to successively contact the points of the distributor, whereby an electrically conductive suppressor, for preventing interference to radio and television reception, may be located in said free space of said body, extending across said free space, and electrically connected to said conductors to complete a circuit through the same.

3. A rotor as defined in claim 2 and wherein a part of said free space of said body is in the form of a cylinder located between said portions of said conductors and extending in a direction normal to the axis of rotation of said body so that a cylindrical suppressor may be located in said free space.

4. A rotor as defined in claim 3 and wherein a second part of said free space of said body passes completely through said body in a direction normal to said axis of rotation and saidcylindrical part of said space, said second part of said free space intersecting and being located about said cylindrical part thereof to provide air cooling of a suppressor supported in the cylindrical part of said space.

5. A rotor as defined in claim 2 and wherein said portion of one of said conductors is formed with a threaded bore adapted to receive a plug for holding a suppressor between said portions of said conductors and in said free space.

6. A rotor as defined in claim 5 and wherein an electrically conductive threaded plug is located in said threaded bore.

7. A rotor as defined in claim 6 and wherein said plug is formed with a recess facing the axis of rotation of said body and wherein a spring is mounted in said recess to press against an endof a supressor located in said free space between said portions of said conductors.

8. A rotor for an ignition distributor to be used in a multi-cylinder internal combustion engine, said rotor comprising, in combination, a body of electrically non-conductive material adapted to be rotatably mounted on the distributor for rotation about a predetermined axis and being formed with a free space extending through the body across said axis; an elongated suppressor, for preventing interference in radio and television reception, mounted at opposite end portions on said body for rotation therewith and having an intermediate portion extending through said free space and being entirely out of contact with said body so as to be air-cooled when said body rotates; and electrically conductive means passing through said body and being electrically connected to said suppressor for conveying electrical current from a source of electricity, through the suppressor and to the points of the distributor.

9. A rotor as defined in claim 8 and wherein said suppressor extends in a direction normal to said axis of rotation and to the direction of said free space.

10. A rotor for an ignition distributor to be used in a multi-cylinder internal combustion engine, said rotor comprising, in combination, a body of electrically non-conductive material adapted to be rotatably mounted on the distributor for rotation about a predetermined axis and being formed with a free space extending through the body in a direction normal to said axis; a suppressor, for preventing interference in radio and television reception, mounted on said body for rotation therewith and having an intermediate portion extending through said free space so as to be air-cooled when said body rotates, said suppressor being symmetrically located with respect to said axis of rotation so as to produce balanced forces during rotation of said body; and electrically conductive means passing through said body and being electrically connected to said suppressor for conveying electrical current from a source of electricity, through the suppressor and to the points of the distributor.

11. A rotor for a distributor to be used in a multi-cylinder internal combustion engine, said rotor comprising, in combination, a body of electrically non-conductive material adapted to be mounted on the distributor for rotation about a predetermined axis, said body being formed with a free space extending through the same in a direction normal to said axis and being symmetrical with the latter, and said body being formed with a pair of opposite bore portions communicating with said free space and being located along a second axis normal to said axis of rotation and the direction in which said free space extends, one of said bore portions being threaded in at least a part thereof; a first L-shaped electrical conductor adapted to successively contact the distributor points, being at least partially embedded in said body and having a portion parallel to said axis of rotation, extending through said threaded part of said one bore portion, and being formed with a threaded opening forming a continuation of said threaded part of said one bore portion; a second L-shaped electrical conductor adapted to be connected to a source of electricity, being at least partly embedded in said body and having a portion parallel to said axis of rotation and extending into the other of said bore portions; an elongated suppressor for preventing interference in television and radio reception, having opposite end portions one of which is located in said other bore portion against said second conductor and the other of which is located in said one bore portion spaced from said first conductor; and an electrically conductive, outwardly threaded plug threadedly engaging said threaded part of said one bore portion, passing through said threaded bore of said first conductor, and being located against said other end portion of said suppressor.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,570,084 Russell Jan. 19, 1926 1,997,460 Fitzsimmons Apr. 9, 1935 2,593,205 Short et al. Apr. 15, 1952 FOREIGN PATENTS Number Country Date 529,645 Great Britain Nov. 26, 1940

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