Abstract: Two fundamental types of auxiliary devices for increasing the fuel efficiency of a conventional spark plug without reforming any part of the spark plug. Each type has a pair of opposing tongues having parallel grooves on their opposing inside faces and flat portions bridging the tongues with which the device is attached to either the top of metal housing and/or ground electrode or the top of center electrode by welding or caulking.

Abstract: An ignition plug with a hollow cylindrical ground electrode, in which the center of a hollow cylindrical ground electrode is faced to the top of a center electrode, supported by a pair of stays, with a spark gap put in between so that the axial line of the center electrode and the axial line of a cylindrical hole of the ground electrode can fall on the same line and the sum of the center electrode's radius and the spark gap can be nearly equal to the radius of the cylindrical hole of the ground electrode. The model can be modified in various ways to increase the propagation speed of ignition and augment the power of expanding combustion gas.

Abstract: This invention concerns an ignition plug for internal combustion engines and a process for igniting gas mixture by the use thereof, which functionally speaking are characterized by utilizing the expansion of initial gas combustion following the formation of primary ignited gasses in a spark gap for the formation of secondary ignited gasses and the completion of combustion over the entire space of the ignition plug. For this, either the inside surface of a ground electrode opposed to a center electrode of the side surface of a center electrode opposed to a ground electrode is made flat in principle in order to drive primary ignited gasses from a spark gap to an ignition groove, which is to be provided to on the top of a center electrode or the other side of a ground electrode as to a center electrode, by the use of the initial combustion explosion in the spark gap so as to accelerate the growth and the multiplication of the ignited gasses there and lead them to complete instantaneous combustion.

Abstract: Disclosed are two types of ignition plugs for use in internal combustion engines of automobiles and the like, which are essentially characterized by the addition of ignition means to conventionally paired center and ground electrodes, and their location to the latters; that is, both the ignition plugs are designed to ignite gas mixture in the whole space of combustion chamber by firstly igniting gas mixture in an ignition groove on the ignition means; for this, the opening of the groove is located in such a place as to receive first ignition seeds appearing in a spark gap between center and ground electrodes as effectively as possible.

Abstract: An ignition plug of this invention is characterized in that a ground electrode thereof has a recess that faces the side surface of a single center electrode; more particularly, in the case of an L-shaped ground electrode whose free end is opposed to the center electrode with a spark gas in between, the recess is provided to on the free end of the ground electrode so that it can hold plentiful gas mixture to ignite near the spark gap by increasing its capacity with the increase of distance from the side surface of the center electrode; thus, the farther the igntion proceeds into the recess, the more intensively gas mixture is ignited, whereby instantaneous combustion can be caused in the entire space of a combustion chamber.

Abstract: A spark plug is provided with a plurality a flame deflecting plates depending from the housing of the plug to define a combustion chamber proximate to the electrodes of the spark plug. The plates may be radially disposed to direct combustion gases radially outward or angled to provide a spiralling motion to the combustion gases. An alternative embodiment provides a sleeve having the flame deflector plates depending axially therefrom in a similar fashion. A spark plug is threaded to internal threads of the sleeve such that the deflector plates are proximate to the electrodes of the spark plug.

Abstract: An ignition plug has a casing with a center electrode disposed therein. Adjacent and mutually spaced from the center electrode is a grounded electrode which is connected to the casing with at least one stay. A gas hole is provided on the grounded electrode opposite from the center electrode. The stay(s) are configured to swirl explosion gases to increase combustion speed. There are several embodiments of the grounded electrode, wherein each is provided with a gas re-entrant cavity on the piston side of the gas hole, wherein the cavity is shape configured for the purpose of accelerating the propagation speed of combustion gas.

Abstract: A spark plug for internal combustion engines is provided with a ground electrode which terminates below the center electrode and is provided with one or more vertical openings to facilitate the passage of ignited gases from the area of the spark to the area of the piston. A single elongated opening may be provided or there may be one or more small openings spaced along the length of the electrode. The area adjacent the opening may be outwardly and downwardly tapered to concentrate and speed the flow of gases.