US2105790A

US2105790A - Radio shielding for electrical distributing systems

Info

Publication number: US2105790A
Application number: US394618A
Authority: US
Inventors: Joseph J Mascuch
Original assignee: Individual
Current assignee: Individual
Priority date: 1929-09-23
Filing date: 1929-09-23
Publication date: 1938-01-18
Anticipated expiration: 1955-01-18

Description

Jan. 18, 1938. J MASCUCH 2,105,790

RADIO SHIELDING FOR ELECTRICAL DISTRIBUTING SYSTEMS Filed sept. 23, 1929 INVEN TOR;

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' Patented Jan. v

- RADIO SHIELDING TRIB FOR ELECTRICAL DIS- UTING SYSTEMS Joseph J. Mascuch, Newark, N. 1. Application September 23, 1929, Serial No. 394,618

43 Claims.

This invention relates to an electric distribution system for internal combustion engines and particularly to a system of radio shielding for the electric conductors used in the ignition system of such engines and it has for an object to provide a continuous metallic shielding for the high tension conductors which is partly flexible and waterprooied while at the same time maintaining the insulation required on such conductors. This inlo vention is a continuation in part of my co-pending applications, Serial Nos. 358,711, flled April 2'1,

1929 and 360,936, flied May 6, 1929, and is more particularly described inthe following specifications and illustrated in the accompanying drawing, in which Fig. 1 is a conduit layout for a radial type of engine as used in airplanes constructed according to my invention; Fig. 2 is a detail partly sectioned, showing a connection to an engine cyl- Fig. 3 is a section of the conduit used in making a connection to a spark plug; Fig. 4 is an enlarged detail of the spark plug connection and flexible conduit partly sectioned and Figs. 5 and 6 are details of the connection between the electric conductor and the terminal of the spark plug.

The use oi radio apparatus on airplanes, automobiles, motor boats or other places where internal combustion engines are used makes it necessary to shield the high tension conductors leading to the spark plugs to prevent interference with the radio apparatus. For this purpose the high tension connections to the spark plugs are insulated heavily and placed in metallic conduits which are grounded on some part of the mechanism. The present invention relates to the construction of this conduit and to the features whereby it is waterprooied.

In the drawing, II is a relatively rigid pipe conduit in circular form which is placed around the base of the cylinders of a radial type or motor led to the spark plugs. This conduit is secured in place by the cleats I3 and is provided with the yokes l4 connecting with the magnetos of the engine which are not shown. Where engines or types other than radialare shielded, the conduit I i may be' made as a straight tube, U-shaped, oval, or other shape, in one piece or sectional, whichever may be best suited to a particular engine. In Fig. 2, conduit II is shown the conductors are go in section with the high tension conductors It placed therein and having a flexible conduit it connected by the screw collars N at one end to the conduit H,- and at the opposite end to the elbow ll, connected with the spark plug of the engine II. A flexible conduit ii is connected to each and is provided with screw outlets at l2 whereby outlet l2 and encloses one conductor from the conduit H to each spark plug. The term spark plug", as used herein, includes members carried by the plug for the purpose of shielding the plug itself. r 5

The spark plug 2| is provided with a stem 2| located in elbow 23 and which has a terminal 25 passing through the eye 21, Fig. 5, in the connector 26. The high tension conductor 22 comprises the conducting wire 3i, Fig. 6, and the 10 rubber insulation. This wire is provided with a terminal 29 formed in a ball 30 to which the wire 3| is soldered, the terminal being of the same diameter as the insulation of the wire .and is inserted in a socket 28 in the connector 26, the socket 15 28 is made with spring fingers to engage the ball 30 as the wire'is pushed into place. This forms a universal connection between the stem of the spark plug and the conductor 22.

The spark plug is provided with a. porcelain 20 elbow 23 which is s 'tably coated with a metallic foil which is grounded on the engine frame and is provided with the screw collar at 32 to which the flexible conduit is attached.

The flexible conduit i6 comprises an inner metallic hose of the type which is made from rolled strip with interloc ng joints and is commonly used in the electrical industries for this purpose, however, in the present case this hose is preferably made from aluminum strip. The overso lapping joints of the metallic hose are provided with asbestos packing according to standard practice for making this hose waterproof. The metallic hose is braided with a comparatively flne wire which may be finished by electroplating. 35 When double braided in this way the metallic hose is completely protected against mechanical abrasion and the braiding in combination with the metallic hose provides complete radio shielding without making the wire unduly rigid.

The metallic hose is indicated at 31 and the double braiding on the outside of the hose is indicated at 36 in Fig. 4. At the ends a flanged collar 35 is soldered to the'braiding and is secured by the screw collar 34 against the collar 32. The outer end of collar 32 is cone shaped and a rubber gasket 33 is seated in this conical shaped cavity and forced into engagement with the rubber covered wire 22 by the screw attachment 34, thus making it impossible for moisture to penetrate the connection in the elbow 23.

This provides a complete metallic cover for the conductor from the place where it connects with the spark plug up to the connection to the magneto and, at the same time, provides a universal connection at the spark plug outlet which is protected against moisture.

Where the ignition leads are separately shielded from the magneto to the spark plugs, the electrical capacitance of the shielding system with relation to the ignition system is so high as to interfere with the functioning of the ignition system. This objection is overcome by grouping the leads in a single manifold which materially reduces the electrical ing system.

Having thus described my invention, I claim;

1. In a radio shielding means for aviatiomengines having a circular contour, a tube shaped to conform to the contour of an engine and provided with a plurality of projecting outlets and means for removably attaching the tube to an engine.

2. In a radio shielding means for aviation encircular contour, a tube shaped to conform to the contour of an engine and provided with a plurality of projecting outlets and means for attaching the tube to an engine comprising a plurality of cleats disposed on the tube. 3. In a radio shielding means for aviation enoi' co-operating shieldingelements and to permit the passage of ignition wires and means to attach the conduit to an engine.

6. In a radio shielding means for internal comto permit the passage of ignition wires and means to attach the conduit to an engine.

7. In a radio shielding system for internal combustion engines having plugs, a rigid ii'old being provided with a relatively large opening to receive a plurality of ignition wires from said distribution unit of the ignition system and a plurality of relatively small projecting outlets to permit individual ignition wires to extend from the rigid manifold to spark plugs.

9. A shielding means for engines having a magneto and spark plugs comprising a main element capacitance of the shieldadapted to be secured to an engine between the magneto and the spark plugs and to enclose the ignition wires thereof, and a plurality of elements each connecting with the main element and adapted to receive and shield individual wires, said elements forming a continuous electrical shield for the wires.

10. A shielding means for engines having a magneto and spark plugs comprising a main element adapted to be secured to an engine between the magneto and spark plugs and to enclose the ignition wires thereof, and a plurality of elements each removably connecting with the main element and adapted to receive and shield individual wires, said elements forming a continuous electrical shield for the wires.

11. In a radio shielding means for internal combustion engines a manifold rality of ignition wires. said manifold being provided with a plurality of screw-threaded outlets to permit the wires to extend from the manifold to spark plugs.

12. In a radio shielding means for internal combustion engines a manifold to receive a plurality of ignition wires., said manifold being provided with a plurality of screw-threaded outlets to receive conduits adapted to enclose wires between the manifold and spark plugs.

13. A radio shielding means for internal com bustion engines comprising a rigid conduit to enclose and electrically shield a plurality of ignition wires and flexible conduits to enclose each wire from the rigid conduit to the spark plugs.

14. A'radio shielding means for internal combustion engines comprising a main conduit to enclose and electrically shield a plurality of ignition wires and flexible conduits to enclose each 15. A radio shielding means for internal combustion engines comprising a rigid conduit to manifold being provided with outlets for single wires, and flexible conduits connected to said outlets to enclose-single wires from the manifold to the' spark plugs. 18. A radio shielding bustion engines com means for internal coma rigid conduit to to receive a pin-- said rigid and flexible conduits forming a liquid proof housing for the ignition wires.

20. A shielding means for engines comprising a main element adapted to be secured to an engine and to enclose the ignition wires thereof, and a plurality of flexible elements each removably connecting with the main element and adapted to receive and shield an individual wire, said elements forming a continuous electrical shield for the wires, I

21. A radio shielding means for internal combustion engines comprising a main element to enclose a plurality of ignition conductors and a plurality of bendable coverings adapted to enclose ignition conductors between the main element and individual spark plugs, said bendable coverings being readily detachable from the main element. A

22. A radio shielding means for internal combustion engines comprising'a central manifold adapted to enclose a plurality of ignition-conductors and a plurality of flexible shielding elements to surround conductors from the manifold to spark plugs, said flexible elements being readily detachable from the central manifold.

23. A radio shielding means for internal combustion engines comprising a rigid conduit to enclose and electrically shield a plurality of ignition wires-and flexible conduits to enclose wires from the rigid conduit to individual spark plugs.

24. A radio shielding means for internal combustion engines comprising a main conduit to enclose and electrically shield a plurality of ignition wires and flexible conduits to enclose wires from the main conduit to individual sparkplugs,

said flexible conduits being readily detachable from the main conduit.

25. In a radio shielding means for internal combustion engines, a main element, a plurality of ignition conductors disposed in the main element, said conductors projecting from the main element at various points and bendable metallic coverings enclosing the said projecting portions of said conductors from the main element to spark plugs, said bendable coverings being readily detachable from the main element.

26. In a radio shielding means for internal combustion engines a rigid manifold, a plurality of ignition wires carried in the manifold and ex: tending therefrom and bendable metallic sheaths on the extended portions of the wires between the rigid manifold and spark plugs.

27. In a radio shielding means for internal combustion engines a rigid manifold, a plurality of ignition wires carried in the manifold and extending therefrom through outlets in the manifold and bendable metallic sheaths connected to the manifold at the outlets to shield theextended portion of the wires from plugs. v

28. In a radio shielding. means for internal combustion engines a rigid manifold, a plurality of ignition wires carried in the manifold and exthe manifold to spark tending therefrom through outlets in the manifold and bendable metallic sheaths removably connected to the manifold at the outlets to shield the extended portion of the wires from the manifold to spark plugs.

29. In a radio shielding means for internal combustion engines a. rigid manifold, a plurality of ignition wires carried in the manifold and extending therefrom through outlets in the manifold and flexible conduits around the extended portion of the wires between the manifold and spark plugs.

30. In a radio shielding means for internal combustion engines a rigid manifold, a plurality of ignition wires carried in the manifold and extending therefrom through outlets in the manifold and flexible conduits removably connected to the manifold at the outlets to enclose wires from the manifold to spark plugs.

31. In a radio shielding means for internal combustion engines a main element, a plurality of ignition wires carried in the main element and extending therefrom, bendable metallic sheaths around the extendedportio-ns of the wires between the main element and spark plugs and means to connect the metallic sheaths to shielding of the spark plugs, said bendable sheaths being readily detachable from both the main element and the shielding of the spark plugs.

32. In a radio shielding means for internal combustion engines a main element, a plurality of ignition wires carried in the main element and extending therefrom, flexible conduits surrounding the extended portions of the'wires between the main element and spark plugs and means to connect the flexible conduits to shielding of the spark plugs, said flexible conduits being readily detachable from both the main element and the shielding of the spark plugs.

33. In a radio shielding means for internal combustion engines a main element, a plurality of ig-' niti on wires carried in the main element and extending therefrom, flexible conduits surrounding the extended portions of the wires between the main element and spark plugs and screwthreaded means to connect the flexible conduits to shielding of the spark plugs.

34. In a radio shielding means for internal combustion engines a main element, a plurality of ignition wires carried in the main element and extending therefrom, flexible conduits surrounding the extended portions of the wires between the main element and spark plugs and means to removably connect the flexible conduits to shielding of the spark plugs and to the main element.

35. In a radio shielding means for internal combustion engines a main element, a plurality of ignition wires carried in the main element and extending therefrom, flexible conduits surrounding the extended portions of the wires between the main element and spark plugs and screw-threaded means to connect the flexible conduits to shielding of the spark plugs and to the main element.

36. A radio shielding means for the ignition system of an internal combustion engine comprising a rigid, sectional manifold, ignition wires enclosed in and electrically shielded by saidrsections and flexible shielding elements to enclose and shield one or more ignition wires between the sections of the manifold and the spark plugs of the engine.

37. A radio shielding means for the ignition system of an internal combustion engine comprising a rigid sectional manifold, said sections having means to join the sections together, ignition wires enclosed in and electrically shielded by said sections and flexible shielding elements to enclose and shield one or more ignition wires between the sections of the manifold and the spark plugs of the engine.

38. In combination with tion engine having an ignition system and spark plugs, a radio shielding means for the ignition system comprising a. plurality of rigid members to enclose and electrically shield ignition wires 0 an internal combusand flexible shielding elements to enclose and shield individual wires between the rigid members and the spark plugs.

39. In combination with an internal combustion engine having an ignition system and spark plugs, a radio shielding means for the ignition system comprising a plurality of rigid members to enclose and electrically shield ignitionwires, outlets on the rigid members and flexible conduits connected to the outlets to enclose and shield one or more wires between the rigid members and the spark plugs.

40. In combination with an internal combustion engine having an ignition system and spark plugs, a radio shielding means for the ignition system comprising a plurality of rigid members to enclose and electrically shield ignition wires, projecting outlets on the rigid members and flexible conduits connected to the outlets to enclose and shield one or, more wires between the rigid members and the spark plugs.

41. In combination with an internal combustion engine having an ignition system and spark plugs, a radio shielding means for the ignition system comprising a plurality oi rigid members to enclose and electrically shield ignition wires and a plurality of flexible shielding elements to enclose and shield individual wires between the rigid members and the spark plugs, one end of each flexible element being removably connected to a rigid member and the opposite end connected to shielding on a spark plug.

42. In combination with an internal combustion engine having an ignition system and spark plugs, a. radio shielding means for the ignition system comprising a plurality'of rigid members to enclose and electrically shield ignition wires and a plurality of flexible shielding elements to enclose and shield individual wires between the rigid members and the spark plugs, one end of each flexible element being removably connected I 'to a projecting outlet on one of the rigid members and the opposite end connected to shielding on a spark plug.

43. In combination with an internal combustion engine having an ignition system and spark plugs, a radio shielding means for the ignition system comprising a plurality of rigid members to enclose and electrically shield ignition wires. flexible shielding elements to enclose and shield individual wires between the rigid members and the spark plugs, one end of each flexible element being removably connectedto a rigid member and the opposite end connected to shielding on a spark plug and shielding on the spark plugs.

JOSEPH J. MASCUCH.