Patents Completed.
Page 18
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Renold Silent Chains. A New Sparking Plug. Cantilever Springing.
K. E. L. QUINNES$, No. 24,165, dated 24th October, 1913.— In this sparking plug, the iiisulation is effected by mica washers surrounding the central pin and kept in a highlycompressed state.
The mica waehers are first assembled in the casing of the plug and a central bolt threaded through them, this bolt being of high tensile strength. The washers are compressed under hydraulic pressure and the top of the easing rolled over so as to maintain them compressed.
The bolt is withdrawn and a tapered hole reamered in the mica, and the central electrode is inserted from the batum. The lower end of it is made of nickel, and preferably the upper part is made of copper so as to conduct the heat away easily. The upper part is insulated with smaller mica washers. The high compression keeps the edges of the mica closed and prevents oil and dirt working its way in between the washers and spoiling the insulation.
0. D. Norm, No. 3139, dated 6th February, 1914, Cognate Application No. 3425, 1914.—Various means are described in this specification for adjusting cantilever springs so as to suit varying loads or different running conditions. Cantilever springs are fixed at one end of the vehicle frame, and to the outer end of the axle; they are pivoted atan intermediate point on the frame of the vehicle; means of adjustment is provided by moving the pivoteframe or fulcrum of the spring. In one construction this is obtained by providing a curved bearing-plate on the main frame instead of an ordinarypivot. As the load changes, the point of contact of the spring and plate moves so that an automatic adjustment is obtained. In another construction the frame carries a bearing-block which is adjustable along the spring. The bolt securing this block is adapted to engage one of a series of holes spaced apart sufficiently to give the required variation. A. 11. G. Grmaero, No. 22,163, dated 2lid October, 1913.— This specification describes a carburetter in which a satisfactory control over the mixture is obtained, the device being of the type in which rotation of the air regulator is accompanied by a simultaneous movement of the petrol or fuel regulator. In the construction illustrated, the petrol regulator is mounted upon and to-axially with a fixed air-jet connected with the air passage shown at the lower right-band side of the accompanying drawing. The petrol from the float chamber flows through the flat opening between the air-jet and the bottom of the petrol regulator, and so gains admission from the outer portions to the central openings in these parts.
The main body of the device above the float chamber shows at the left-hand side an air inlet and at the right-hand aide a mixture outlet. A cylindrical air regulatorwhich can be rotated is arranged co-axially with the petrol regulator, and at the upper end of the air regulator is a passage which communicates with the inlet and outlet apertures and also with the aperture of the petrol regulator. The petrol regulator and air regulator are connected by means of a lever, whereby they can be simultaneously actuated.
H. RENOLD AND HANS RESOLD, LTD., No. 1774, dated 22nd January, 1914.—Silent chains have hitherto been made with the individual links each provided with separate bushes or liners, the bushes being of such a length as to maintain the links apart and prevent galling. It is found, however, that this clearance is not sufficient to ensure lubrication of the links, and therefore exueesive wear has very often resulted.
In this invention the bushes or -liners are made se long that when the links are assembled they are spaced apart by a distance of a quarter or half the thickness of each link. The chains may be lubricated either by dipping into an oil bath or by means of a special device which is described.