(under subclass 179.1) Apparatus wherein the accessory device comprises means for supplying a combustible mixture of air and hydrocarbon directly to the working cylinder of the engine, together with means for igniting the mixture within the working cylinder after the mixture is supplied to the cylinder, and the accessory devices being separate and distinct from the elements constituting the engine and not involved in its normal operation.
(1) Note. The accessory device for this and the indented subclasses include means for supplying an easily vaporized fluid to the engine when it is to be started, whereby the initial combustible charge is more easily formed, the engine being afterwords operated by a less volatile fluid, the means not coming within the terms of subclass 127 definition. The means for igniting the combustible mixture is frequently the regular igniting device of the engine or such device with suitable auxiliary appliances to adapt it to use in a starting device of the type occurring in the subclass. The essential features in the devices is that a combustible mixture is supplied directly to the interior of the working cylinder and ignited to start the engine by power generated within itself. Such mixture may be supplied at substantially atmospheric pressure or at a comparatively high pressure, and it may or may not be compressed in the working cylinder by a
movement of the working piston before ignition.
(2) Note. Inventions limited to a mechanism for igniting a combustible mixture as above where the engine is to be started are classified in this class, subclass 184.1, notwithstanding the fact that the starting devices occurring in this subclass are necessarily provided with some type of igniting device or the fact that the igniting device in question may be designed for use with a starting device of the type occurring in this subclass.
(3) Note. For internal combustion engines which are self-starting because of the cycle upon which they operate, a combustible mixture being supplied to the working cylinder under pressure, see this class, subclass 68.
