GB488195A - Improvements relating to the shielding of ignition wires of internal combustion engines - Google Patents

Abstract

488,195. Carrying high tension leads on internal-combustion engines; two-part couplings. TITEFLEX METAL HOSE CO. Dec. 31, 1936, No. 35842. Convention date, Jan. 23. [Classes 36 and 38 (i)] To prevent radio interference from the ignition system of an internal - combustion engine the spark plug leads are individually housed in metal conduits 5, 7, Fig. 1, and the leads from the magneto or other source of igni- 'tion current are housed in metal conduits 12, 13, the spark plug leads and the leads from the source of ignition current being detachably connected by conductors carried within a metal manifold 6. The leads from the source of ignition current comprise conductors 33, Fig. 5, having at one end terminals 41 for connection to the magneto or other source of ignition current and formed at the other end with contacts plugs 35 which are mounted on an insulating disc 36 and are adapted for connection to corresponding contact sockets carried by an insulating disc 27 mounted on the manifold 6, Fig. 3. The disc 36 is supported by a flanged sleeve 37 to which is attached the screening conduit for the leads the conduit being in the form of a corrugated tube 34. The sleeve 37 carries a screwthreaded ring 38 adapted to screw on a threaded sleeve 29, Fig. 3, surrounding the contact disc 27 of the manifold, so as to connect the leads 33 to the contacts of the disc 27, and connect the tube 34 to the manifold. The spark plug leads, Fig. 7, are of similar construction to the magneto leads but contain one conductor 45 only, the latter terminating in a plug contact 49 which is adapted to be drawn by a threaded ring 51 into connection with one of a number of corresponding contact sockets mounted in screwed sleeves 44, Fig. 3, projecting from the manifold. The manifold, which contains conductors connecting the contact sockets in the insulating disc 27, Fig. 3, to the contact sockets mounted in the sleeves 44, may consist of rigid sections 20, 21, 22, connected together by flexible sections 23, 25. The manifold may taper in crosssection towards its ends. Specification 101,418, [Class 99 (ii)], is referred to. The Specification as open to inspection under Sect. 91 comprises also the subjectmatter of Specification 488,252 and describes a manifold built from a number of metal pipes 69, Fig. 14 (Cancelled), each housing one ignition lead. This subject-matter does not appear in the Specification as accepted.