TWO INTERESTING GULLY-EMPTYING DEVICES.
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A Resume of Recently Published Patent Specifications.
TWO inventions relating to machines for emptying gullies are shown in the specifications of Dennis Bros., Ltd., Nos. 259,402 and 259,403. The first of these relates to a dual-purpose machine that will act as a gully emptier as well as a street-washing machine. The feature of this machine is that in addition to the usual suction pipe for raising sludge from gullies by means of a partial vacuum, it has a pipe connected to the tank by means of which water can be discharged for street cleaning. The tank is mounted) on trunnions to allow it to be stipped to discharge its sludge, and the water -pipe enters the tank through a watertight joint foresed co-axial with the trunnion, so that tipping does not in any way interfere with the connection of the water pipe to the tank.
The second patent refers to the connectieln of the auction hose through which the sludge is drawn to the tank. The specification points out that considerable trouble has been experienced in this class of vehicle through the suction pipe forming a kink when the long nozzle is raised. To avoid this kink, the connection between the hose and the nozzle is made in the form of a ball joint, as shown just above the
large valve. Packing rings are provided to ensure an airtight joint.
Fuel Invention.
THE following German patent may be taken as in indication that many brains are at work trying to improve the manufacture of fuels suitable for use in automobiles.
The J. D. Reidel Aktiengesellschaft, of Berlin, in patent No. 240,182, say: "When tetrahydronaphthalene is heated to a high temperature, that is to say, over 400 degrees C., in presence of alumina, or a mixture of alumina and one or more other metallic oxides and if necessary in the presence of hydrogen, there is a partial cracking of the parent material, whereby a considerable proportion of hydrocarbons of lower boiling point is obtained, a like result is observed when naphthalene is the parent material provided there is an abundant supply of hydrogen, for the product of hydrogenation formed intermediately suffers a partial decomposition. "By the present invention the product of the cracking or decomposition referred to above is distilled to obtain a fraction of lower boiling point, and particularly a fraction boiling below 200 degrees C.. for use as a motor fuel. This fuel is free from the known
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defects of naphthalene due to its solid Condition and ats capacity for , subliming and is superior to tetrahydronaphthalene for the purpose in question because it has a lower boiling point and is more easily gasified." The principal claim is as follows : " The manufacture of a fuel for internalcombustion engines by distilling so as to obtain a fraction of lower boiling point, particularly a fraction boiling below 200 degrees C., the product of cracking or decomposition herein referred to.
One Bearing Bail More.
THE usual method of filling a ball bearing when no filling-slot is provided is shown in the lower left-hand view of our illustration to patent specification No. 255,024, where the inner ring is placed in contact with the outer ring so as to leave the greatest space possible for the introduction of the balls. After being introduced in this manner, the balls are evenly spaced out and are kept at this even distance apart by means of the cage.
In the case shown there are only seven balls, but by means of the arrangement which forms the feature of the patent of the Compagnie d'Applications Me aniqnes of France, No. 255,024, on more ball can be introdueed tham when the usual arrange
ment is employed. The upper lefthand view shows that the outer race is slightly hollowed out to a radius correspondieg to that of the inner ring, which just permits of the extra space which enables the extra ball to be inserted. The right-hand views show the hollow in section. It is true that this arrangement allows an extra ball to be used, hut the sectional continuity of the outer ring is not maintained.
A Flexible Mounting for Bearings.
JOHN I. THORNYCROFT AND
CO., LTD., and V. G. Barford, in specification No. 259,282, show a method of mounting ball or other bearings so that they can aecommodate shafts that are subject to flexion or other disturbances which would cause binding if rigidly mounted bearings were employed.
The rigid housing of the bearing is of unusual diameter, and to it is attached at three points a disc similar to that used in flexible couplings of
universal joints. To this disc is also attached at three points the actual boss in which the bearing is mounted, so that there is nothing connecting the boss with the outer housing except the flexible disc.
A Radiator with Removable Tubes.
GUY DAVIES, in specification No. 258,537, shows a novel construction of radiators of the vertical-tube type. The top and bottom plates are recessed to receive rubber washers, which may be tither vulcanized or may be made so that they press into their recesses tightly and to fit the tubes so that they form a watertight joint. Mention is also made of a collar that may be fixed to the tubes to prevent them dropping.
Carburetter Regulation. pANEEARD AND LEVASSOR, of Paris, in specification No. 255,430, shows a means for modifying the proportion of fuel in the explosive mixtwe when the engine is running, thereby reducing fuel consumption. A ring is mounted in the induction pipe so that it pivots round the petrol jet and is controlled by a stem which passes through the wall of the pipe and is fitted with a lever for manipulation, its purpose being to restrict the bore of the choke. When the ring is in the position shown in-full lines in both views, the tube is reduced at that point by the thickness of the ring, consequently the miXture is at its richest, and when the ring is in the position shown in dotted lines, an almost full aperture is permitted.