PATENTS SUMMARIZED.
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New Robey Motor Plough.
Entered in the patent records as No. 114,516, W. T. Bell and Others, this week's principal patent---principtl, that is, from the point of view of our readers —.really emanates from Rabey and Co., Ltd., Lincoln, of which concern W. T. Bell, one of the patentees, is a director. It refers to a self-contained. motor plough, considerably larger than the usual run of this type of machine. The outstanding point is that it is a three wheeled •machine, all three wheels, being driving. wheels. The ploughs, of which it . normally carries four, Are disposed within the Wheelbase.
The engine isipositioned in the framing near the front of the machine, „and drives through. two-speed-and-reverse gear of customary type to a countershaft, On 'the crankshaft-are two ehain sprocket wheels, Q n e of 'which serves to ;transmit the-drive to the rear wheel; the other to the front live axle.; _ The drive to the rear steering wheel is most interesting,: This wheel is carried on a central bearing of large diameter, which surrounds, or contains, a vertical piVot. Tothe wheel itself is bolted a chain ring,: and this is coupled by a roller chain to a driving. pinion carried on a :short length.of shafting which is
• supported by' the same bracket and fram ng as the hub of the wheel. In consequence, when the wheel is turned in a horizontal plane for steering purposes this driving sprocket: pinion and its shaft turn with it. The end of the short. ehaft carries the pin of a universal joint, this pin being disposed so that in is in a direct line with the steering pivot. The other half of the universal joint is atnaehed to an inclined short shaft car-. tied by the main frame, and On this short shaft is the sprocket wheel which takes the drive from the main countershaft-.
It is Intended that the machine shall serve as a univmsal pin pose tractor, and it is therefore fitted with drawbar, belt pulley for use when driving stationary machinery, and, furthermore, it should he noted that the front axle is sprung, an eseential feature for a road machine.
• Detail Improvements.
C. G. Pullin has parented (No. 114,518) a slipper type of piston which it is intended should be cast in aluminium.
A dummy hub for use when towing in cars which have suffered damage to either of the axles forms the subject of No. 114,087, by G. S Owen.
E. E.-Canna:ass, No. 113,739, provides against the loosening a a nut upon its thread by fitting under ohs nut a washer towards the interior f which project a number of V-s11eel tongues.
Specification No. 114,525, by W. E. Martin, concerns the chain track ,tread of the Martin tractor.
IL Street describes in No. 114,592 a construction of tipping wagen.body with a link between the pivot on the chassis fraine and the pivot on the body. The idea involved is that as the wagon tips, its pivot falls slightly so that it becomes to•all intents and purposes self-tipping.
A patent by A. Belleville, No. 113,707, has reference to that type of two-stroke engine in which a trunk .piston, having two. diameters; 'is employed, the larger portion being used to compress the gas before its induction into the working cylinder for which the smaller portion forms the piston.
R. A. Shields patents in No. 114,531 a carburetter in which the incOming fuel . is caused to ascend a spiral passage round the stein of a needle :valve. The upper end of this stem is in. the inductionpassage., and the air inlet is suction controlled, being normally' kept shut by
means of a spring. • •
E. K. Lund suggests that in order, to facilitate the 'starting of petrol engines in cold weather, taps should be inserted in the water circulating system, so that • the cylinder can be cutoff from connection with the radiator Hot water Can then be-poured into the cylinder ja The specification is numbered 114,519.