Spark plug
Реферат: 955,224. Spark plugs. GENERAL MOTORS CORPORATION. July 24, 1962 [Aug. 15, 1961 (2)], No. 28398/62. Heading FIB. The earth electrode 2, Fig. 1, of a sparking plug for a rocket or jet engine has electrical connectors 5, 6, connected thereto at spaced points across which a voltage drop occurs when a spark is produced, which voltage may be used to operate an indicator 7 to indicate that the plug is operative. A metal sleeve 8 is spaced from the electrode 2 over the portion between the connectors 5, 6, so that any leakage current due to a faulty insulator 4 is earthed through the sleeve 8 and does not produce a voltage drop across the connectors 5, 6, thereby preventing inaccurate operation of the indicator 7. In Fig. 2 the central electrode 10 is supported in a two part insulator 11, 12 and the earthed electrode 14 has a pair of connectors 18, 19 connected thereto at points 20, 21, which connectors lead to a connection fitting 22. An earthed metallic sleeve 24 shields the portion of the earthed electrode between the points 20, 21 and an outer metallic sleeve 16 prevents stray currents being produced in the wires 18, 19.
Spark plug and method for manufacturing spark plug
Номер патента: US20220060000A1. Автор: Junji Kimura. Владелец: NGK Spark Plug Co Ltd. Дата публикации: 2022-02-24.