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Patents Completed.

12th March 1908, Page 26
12th March 1908
Page 26
Page 26, 12th March 1908 — Patents Completed.
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Which of the following most accurately describes the problem?

CARBUR ET T ER.—Evans.—No. 16,939, dated 24th July, 1907.—A chamber (A) is provided with covers (R, C) which carry the tube (D). A tapered sleeve(E) having saw cuts (E1) on its loWer circum ference is fixed within the tube (13). These saw-cuts admit air into the tube (E) ; they are controlled by a sleeve (H) which is also provided with saw cuts. Within the tube (E) is a fuel nozzle (Cil which receives the fuel from the float chamber through a conduit (N). The float chamber (A) contains an annular float (I) which operates the fuel-supply valve (i.) by means of the lever (K). An auxiliary air inlet (0) is provided and this is controlled by the throttle valve (9). The mixture is passed through a heating chamber (T) by means of the tube (11) before being conveyed to the engine. The exhaust gases are passed through the heating chamber (T) by means of the inlet and outlets (TI),

VALVE MECHANISM.—Pieper.--No. '24,316, dated 4th November, 1907.—This invention relates to valve arrangements for four-cycle, internal-combustion engines having two, or more, cylinders ; and it consists in arranging two valves for each pair of cylinders, one of which regulates the inlet to the first and the exhaust to the second cylinder, and the other

crank shaft by means of the gears (12, 10, 13) the power being transmitted through connecting rods (21, 22). If the cycle of operations in the cylinders (1, 2) be followed around the circles (10, I1) and the sectors corresponding to the suction stroke be indicated by Al, A2, those corresponding to the compression by Cl, C2, and those corresponding to the explosion by F.X1, EX, and, finally, the sectors corresponding to the exhaust by El, E2, the result will be that the inlet in the cylinder (I) takes place at the same time as the exhaust from the cylinder (2), whilst the inlet sector (Al) of the cylinder (2) is symmetrical with, but opposite to, the exhaust sector (El) of the cylinder (1). Therefore, in each case, the two functions can be obtained by one valve only. Further, with any desired number of cylinders with cranks disposed at 180 degrees, two concordant groups of functions result, and these can be obtained by two valves only.

WHEELS.—Shearing and Others.— No. 25,291, dated 14th November, 1907.— The spokes (Al are formed With their inner ends tapered (as at Al) and they are

provided with shoulders (At). Between each pair of spokes is a wedge-shaped segment (B) having bevelled surfaces (31) upon which the shoulders of the adjacent spokes bear. Each segment (B) is provided with two shoulders (B2), one on each side, and the dimensions of the inner portions of the segments are such that, together, they form the centre of the hub. The outer ends of the spokes are arranged in the usual way to enter holes in the felloe (C), Plates ).E) and bolts (F) are provided to hold the coinponent parts securely. The advantage of this construction is that, by withdraw

ing the wedges (B) on either side of a spoke, space is left to allow for the withdrawal, or replacement, of the same without interference with the felloe.

VARIABLE SPEED GEAR.—Lanchester.—No. 5,835, dated 11th March, 1907,—This invention relates to changespeed mechanism of the type in which a single train of epicyclic gear is used for providing three forward speeds and a reverse. A sun pinion (a), planet pinions (b), and an internally-toothed ring (e) are provided. Each of these elements is connected with driving continuations (al, b1, el) on either end, so that they form a series of concentric sleeves on opposite sides of the gearbox (e). The ends of the driving continuations (al) are furnished with rigidly projecting teeth ,(al, al) which form dog clutches. The continuations (b1, cl) are also provided, at their outer ends, with similar clutch teeth (b2, b3 and el, el respectively). It will be seen that, presuming suitable sliding mechanism and means for engaging the clutches are provided, it is possible to put any one of the three elements (a., b, or e) into engagement with either the driving shaft (f) or the driven shaft (g). To effect such engagement the driving shaft is provided with a coupling (h) fitted with an internally-toothed element (i) whilst the driven shaft CO is provided with a pair of couplings (j, j1) the first of which is formed with an internally-toothed element (h) and the second with teeth (hl) to gear with projections (b3) on the sleeve (b1).

VALVE ARRANGEMENT.—Brasier.— No. 19,959 dated (under Convention) 13th March, 1907.—This invention provides a valve-control arrangement for releasing compression or affording what is known as "half compression" in explosion engines. The exhaust valve (A) is raised by the cam (B) which is mounted on the shaft (b) through the tappet (C). Also mounted on the shaft (b) by the side of the cam -11,1 is another cam (B1) keyed on to the shaft in such a position as to operate in the course of the compression stroke. To obtain "half compression" the blade (D) Is SO moved, by means of the lever (.E), that it is brought to the position shown in Figures 2 and 3, its bulge being then situated below the part (Cl) of the tappet rod. When the cam {B) meets the blade (I)) it lifts the latter which, in turn, raises the tappet rod and the valve (A).

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