Patent GB-190512857-A (GB)
Title: Improvements in Marine Paraffine Motors.
Inventor: GOEDKOOP DANIEL
Filed: 1905-06-21
Granted: 1906-02-15
Abstract: 12,857. Goedkoop, D., and Goedkoop, J. June 21 Gas or explosive-vapour engines.-Relates to fourstroke-cycle paraffin motors for marine propulsion. The propeller shaft may be reversed by any suitable gear arranged in a casing connected to the crank chamber as shown in Fig. 2. Specification No. 13,591, A.D. 1902, is referred to. Cylinders. - Water is circulated through the cylinder jackets o by a centrifugal pump m operated by a friction pulley n working on the inner rim of the fly-wheel. The inlet valve-chest 32 is inserted in the cylinder head and is surrounded by an air chamber 33 opening into the valve-chest through ports 34. The top of the valve-chest is closed by a cover 42. Carburetting; pumps.-Liquid fuel is supplied to the valve-chest through ports 36, 37 in the ribs 35, by a pump j operated from the half-speed shaft g. The fuel falls on the upper face of the inlet valve and is afterwards further vaporized by coming in contact with a vaporizing-chamber l in the combustion chamber. The pump is operated by a projection 16, which, at intervals, engages with a bell-crank attached to the pump plunger, Fig. 3. The travel of the plunger may be adjusted by a screw connexion 23, and may be rendered inoperative when the speed is excessive as explained below. Governing; valves and valve-gear.-The inlet valve c is operated by the piston suction and when necessary may be held off its seat by depressing the screw 44. The controlling-spring 30 is held in position by a split collar 39. The exhaust valve is operated by an eccentric f on the half-speed shaft g. The eccentric-rod v imparts motion to a valvelifter 2, which is carried by a shaft 1 and engages with a sliding piece 3 for operating the valverod 4. A spring 25 is inserted between the sliding piece 3 and the end of the valve-rod 4. Carried by a boss on the valve-lifter 2 is a pin 6 for receiving a bell-crank lever 7, 11, the horizontal lever 11 having an adjustable weight 12 and being held in a horizontal position by a spring 13. The spring is also attached to the spindle 1 and normally holds the valve lifter 2 in contact with the slide 3. As the speed increases, the depression of the weighted lever 11 slightly rotates the spindle 1 and throws the valve-lifter off the slide 3. The lever 7 is at the same time thrown out of the vertical, and a small grooved pulley 9 carried by it works on a guide-rail 10. So long as the exhaust valve remains closed, the fuel pump is stationary. Igniting; starting.-Igniting is effected by a current generated by a magneto-machine A. An oscillating armature is used and may be operated in any convenient way. As shown in Fig. 3, the armature is actuated by a lever i with which engages a cam 45 carried by a gear-wheel g'. When starting, the lever i is held in its uppermost position by a catch 44<a>, and is released by a cam or trigger projecting beyond the edge of the gearwheel. If the engine should back-fire, the cam partly rotates upon its axis and is returned to its normal position by a spring. Petrol may be supplied to the tank t in the supply passage when starting, the pump j being operated by hand.