Patents Completed.
Page 24
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Sparking-plug Improvement. Novel Piston Rings. Steam Packing.
II. G. LONGFORD and W. A. Cretux, No. 7365, dated 20th September, 1913.---The object of this invention is to provide for the more uniform heating of the plug, so that there is less liability of the porcelain breaking or cracking as the result of strains produced by uneven heating.
The insulating material is use in two separate parts. The main body of the insulator is fixed in a metal casing in the ordinary way, and a secondary insulator is provided around the central electrode to divide the space within the plug into two chambers.
This secondary insulator is subject to the highest temperatures, but it is mounted on some resilient support which will allow for the necessary expansion without strain. The main insulator is heated by the gas contained in the. inner of the two chambers within the plug, and the openings of the chambers are made in such a manner that there is Eut little circulation of gas into and out of them.
On starting up the engine, therefore, the gas in the inner chamber is slowly heated, the -main insulator is also gradually warmed up.
R. ALIEN, No. 8470, dated 10th April, 1913, Patent of Addition to No. 26,674, of 1910.-1n this stuffing box leakage is prevented by one or more segmental pressure-balanced rings, which are pressed against the rod by springs. At the bottom of the box a soft packing, which is pre ferably impregnated with lubricant, is inserted. This is held in place by a ring fitting round the rod, and above this ring is a partition. Springs between the two force the soft packing downwards and against the shaft.
Above the partition ring is a complete incompressible-ring which serves as a seat for the segmental balanced-ring, and above the latter there is provided another incompressible ring, with springs which act between it and the segmental ring, and which force the various segments in towards the rod. The solid rings have a large surface in contact with the red, and they are grooved to provide expansion spaces for he steam passing along it, thereby relieving the pressure en the segmental ring. II. E. Online, No. 23,136, dated 13th October, 1913.—in the system of rings described in this specification the main feature is that the rings themselves are used in pairs and have both edges bevelled.
The top of the piston is made solid and turned to a bevelled edge, fitting the first piston ring. Tins is bevelled on its upper side and squared on the lower, against which the second ring fits. This second ring is bevelled on its lower edge and is seated on a slip ring. Another pair of similar rings is provided and -then a solid ring. A similar set of rings, except that there is only one pair of bevelled rings, is provided at the bottom of the piston, and a spiral spring, surrounding the piston, is used to hold the two sets of rings apart and the various members of each set close, together. No leakage is possible between the gaps in the rings as two rings are inserted in each piston groove and the gaps are on opposite sides of the piston. Further, no leakage is possible past the insides of the rings because of the bevelled edges being kept tight against their respective seatiegs.
SCtCIETE M. GODDARD ET MENNESSON, No. 9145, dated under the ilnternational Convention, 24th February, 1913.---In this carburetter the secondary-air inlet is provided in the throttle itself. The throttle is of the ordinary type, with a through passage which can be turned to register more or less with thek choke-tube, but lateral openings are also provided. These consist of two large openings and two small ones, each pa:r being located on a diameter. The throttle is held in place endwise by a cover-plate, whiel is provided with similar openings. This plate is made adjustable on the throttle-spindle, so that the openings in the plate can be brought to register to any desired extent with the openings in the throttle, whatever be the position uf the lattee. The air and mixture are controlled automatically by providing a pin on the inner face of the dice, to engage a groove in the throttle, so that when the throttle is turned to some definite position it correspondingly adjusts the air inlet. This throttle-valve may be applied to any type of earbu, retter or to any kind of jet.