Patent GB-190407782-A (GB)
Title: Improvements in or relating to Internal Combustion Engines.
Inventor: JACK ANDREW
Filed: 1904-04-02
Granted: 1905-03-16
Abstract: 7782. Jack, A. April 2. Gas and explosive-vapour engines.-Comprises (1) a switch by which ignition may be timed to start, stop, reverse, or regulate the speed of the engine ; (2) an oil-regulating valve worked by the handle of the timing-switch, and (3) an oilmeasuring valve worked by the engine with or without an air pump for ejecting the oil charge from the valve into the engine cylinder. Igniting.-The switch is shown diagrammatically in Fig. 1 in its normal position for causing ignition to take place when the crank is on the inner dead centre. By moving the stator D, A in the direction of the arrow H, ignition is gradually retarded, and occurs just before the contacts D, E become separated, at about half out-stroke. By continuing the rotation of the handle, the part E engages the other end of the part D and the circuit is completed by the rotor F and stator A at about half in-stroke ; the engine is consequently reversed, and, as the stator completes its movement through a circle, the sparking in the new direction of running is advanced until it again occurs on the inner dead centre. A stop G prevents the stator from moving much beyond 360‹, and other stops may be inter posed by a governor to prevent the engine from being reversed when running at a high speed, and to prevent the stator from passing the inner dead centre igniting-position when the engine is not running. The stator may be worked through gearing from the handle. Several different arrangements of the contacts on a switch for a two-stroke cycle four-cylinder launch engine are described for controlling the primary or both primary and secondary circuits of one or four induction coils. Fig. 6 shows a switch controlling both the primary and secondary circuits of a single induction coil, the rotor carrying the single contacts q, g, and the stator the quadruple contacts p, h. Fixed contacts k connected to the spark gaps x engage complete rings l connected to the contacts h, and a semicircular contact b, corresponding to D, Fig. 1, and connected to p, engages the fixed contact Z. The single contacts g may be stationary and the contacts h rotary. Fig. 20 shows a contact corresponding to D, Fig. 1, made in three pieces, of which a<10> is fixed to the stator, and c<10>, d'‹ are loose and are pushed into contact with a<10> by the contact b<10> when advancing ignition after reversal, but are pushed away from it as b<10> leaves a<10>. Sparking much in advance of the dead point position is therefore prevented. Fig. 8 shows a rotary switch with insulated notched plates P for supporting the roller N when it is out of contact with the notched live plate O. For non-reversing engines, the stator only traverses a small arc. Valves.-The oil stop valve, Fig. 9, is worked from the switch handle. There is a certain amount of lost motion between the parts m<6>, e<6>, and closing is effected through a spring g<6>. Hydrocarbons, supplying. - An oilmeasuring valve comprises a rod c<5>, Fig. 12, with a loose sleeve b<5> which is made to reciprocate between the part a<5>, c' by the friction of the stuffing-box. Oil from the float d<5> enters the space between the parts b<5>, c<5>, and is delivered through the port f either unaided or by air compressed by the part c<5> at the end of the casing. A double-acting oil valve and air pump are described in which the measuring cavity is adjusted by screwing the parts a<5>, c<5> together and working them by hand or by a governor. A charge of oil may by this means be forced into a compressed air charge in the cylinder.