Patents Completed.
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Complete specifications of the following patents will be sent to any address in the United Kingdom upon receipt of eightpence per copy at the Sale Branch, Patent Office, Holborn, W.C.
INTERNAL COMBUSTION EN. GINE.—Rose.-No. 24,753, dated 13th November, 1908.• This invention relates to internal-combustion engines of the rotary-sleeve-valve type. The rotarysleeve valve is interposed between all inner cylinder, in which the pisto IL reciprocates. and an outer water-jacketed cylinder. The rotary valve is provided
with the usual inlet and exhaust ports, which are adapted to register with similar ports provided in the walls of the outer cylinder. The rotary-sleeve valve is rotated by means of a worm wheel gearing with external worm teeth formed on the said rotary sleeve; the worm wheel is suitably 'connected with, and driven by, the crankshaft.
VALVES FOR INTERNAL-COMRUSTION ENGINES.—Horsley and Others.—No. 25,662, dated 27th November, 1908.—The head of the cylinder is bolted to the cylinder itself, and it has inletand exhaust ports formed therein. These ports are adapted to be opened and closed by means cd a rotary disc having a port Or opening therein, which regiSters with the inlet and srxhanst ports at the
proper moment. The disc is carried by a spindle, which extends through the head of the cylinder, and has a bevel pillion mounted on it which, in turn, is suitably geared to the crankshaft. A spiral spring is provided to maintain the disc valve against the under face of the cylinder head, and this spring abuts against a loose ring. In order to minimise friction, balls are introduced between the loose ring and the bevel pinion; this arrangement then acts as a thrust washer for the bevel drive only, of course.
THERMOSTAT. — Sheppee. — No. 26,910, dated 11th December, 1908.—According to this invention a thermostat is employed in conjunction with a flash steam generator to regulate the supply of fuel, and, at the Barns time, to actuate a pyrometer. The steam pipe is taken from the flash generator and carried along the frame of the vehicle for some distance, and looped, so as to form a U, and again returned to the generator. A pivoted lever bears against the end of this U pipe, and is connected by moans of a link to a quadrant on the fuel valve, and to a hell-crank lever pivoted on the dash-board : one arm of this lever consti
tutes a pointer. This pointer traverses a scale which indicates to the driver the approximate temperature of the generator. It will be seen that any variation in the length if the loop of the steam pipe, due to the rise and fall of temperature, will not Indy affect the fnel valve-, but will also operate the pyrometer.
ELECTRIC CONTROL DEVICE FOR PETROL MOTORS. — Leitner. — No. 2,220, dated 29th January, 1909,—According to this invention, the fluctuations in the voltage between one main brush and a subsidiary brush on a dynamo are employed to control the throttle of a petrol motor. A dynamo (a) has two main brushes (b) and two subsidiary brushes (c, c). Ono of the main brushes lb) and oim of the subsidiary brushes (c) arc together employed to excite a solenoid (d); a variable resistance (e) being introduced into the circuit. The core (d1) of the solenoid is connected to the spindle (f) of the throttle (0) which is normally maintained open by the action uf a spiral spring (i). On starting up the engino the throttle is wide open, but as soon as the speed increases—even if the dynamo is on open circuit—the throttle commences to close and the engine is prevented from racing. If now ii load is put on the engine it will slow down, hot the more it slows down the wider the throttle valve will be opened, thus giving more and more power up to a condition of equilibrium.
If it is desired to increase the speed of the engine it is only necessary to introduce more resistance into the circuit of the solenoid, thereby causing it to pull less. at any given voltage-speed. In order that the throttle may be operated independently of the solenoid, a Bowden wire is attached to the core (0).