Abridgments of Interesting Patent Specifications.
Page 20
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Renault's Valve Gear. Bussing's Chain Relief. Cundall's Starter.
No. 29,060 : Dated July r6th,
Renault, Billancourt, Department of the Seine, France.—To prevent noise and rapid wear in the toothed wheel gearing used in connection with the valve gear of high-speed internal combustion engines, the toothed wheel Oh for transmitting motion to the valve gear, instead of being keyed directly to the crank shaft (2), is loose on the brasses (3) of the said shaft, which brasses are supported in the casing of the motor. On the end of the crank shaft (2) is keyed a sleeve (4) provided with projections (5) arranged diametrically opposite each other and capable of
engaging with corresponding slots in a ring (6) carried by an extension of the toothed wheel (i). This ring (6) is also provided with slots (preferably in a direction perpendicular to the first-named slotsi and in these slots engage projections (7) on an extension of the toothed wheel (1). The ring (6) thus acts as a kind of elastic coupling through which the rotary motion of the crank shaft is transmitted to the spur wheel (1) without objectionable shock or vibration, and the toothed gear rotates uniformly without jerks on the brasses (3), and noisy working of the valve gear is prevented.
No. 24,469 : Dated November 23rd, 19o3.—Complete specification. "Improvements in or relating to Driving Mechanism for Motor Vehicles." H. Bussing, Brunswick, Germany.—A device for relieving the strain put upon the chain when starting or when the road wheel is suddenly checked by an obstacle. The driving axle (c) is connected with the car frame (r) by means of drawbars (b). These bars (b) have at one end strong springs (f) located in casings (o), and are so mounted in supports (d) attached to the car frame (e) that they are permanently under tension from the said springs. The end pins (n) of the car springs (g) are mounted in slotted guides (k). In consequence of this arrangement, when the engine is started, the strain exerted on the driving chain (m) first draws the driving wheel axle in the direction of the pull of the chain, during which movement the springs (g) slip forward in their slots (k), and the bars (b are advanced against the springs (f). The car is thus gradually started as the pressure on the springs (f) increases. To prevent undue strain upon the chain by the constant pull of the springs (f), side projections (p) are connected with the driving axle, and carry pins (i) and drawbars (a) mounted on the car frame (e) engage by means of slots (h) over these pins (1). When the car is started the pins (i) first slip forward in the slots (h), and then return under the influence of the springs
(f) until they again reach the ends of the slots, and so check the further backward movement of the axle and the further tension of the chains connected therewith.
No. 47,794: Dated December 20th, 1904—John Samuel Cundall, and others, of R. Cundall and Sons, Ltd., Airedale Iron Works, Shipley, York.—This inven
tion relates to means for starting explosion or internal combustion engines, the said means likewise being capable of employment in oil or petrol or like engines for supplying the combustible mixture to the combustion chamber or vaporiser and
spraying or atomising the oil or mixture of oil and petrol or the like, after being used for starting the engine. The object of the invention is to provide a device for starting an explosion engine without the use of compressed air or any of the cumbersome expedients now adopted for this purpose, and a further object is to use the same means on petrol engines not only as a starter, but for supplying the combustible mixture to the engine. The device comprises a cup (a) screwed to a pipe (b) provided at c with a valve, and communicating at bi with the combustion chamber. In the cup or vessel (a) is fitted a syphon tube or pipe (b) having its shorter depending leg or member open to the cup near the bottom thereof, and the other or longer leg or member of the tube extending into or through a central opening in the bottom of the cup and having free communication with the pipe or column (b). In the bend of the syphon is a small hole (di) to admit atmospheric air to destroy syphonage whenever there is no vacuum or suction to maintain syphonage. For starting gas, oil, or like engines a charge of petrol or other suitable spirit or oil is placed in the cup (a), and then the valve (c) opened to give communication with the combustion chamber. The balance wheel of the engine is now turned by hand to move the piston outward, and the suction or vacuum thus created in the cylinder starts syphonage of the petrol from the cup (a), a small supply of air entering the syphon at di, and mixing with the petrol as it passes through the syphon, while a further supply of air is mixed with the spirit after leaving the syphon, this entering the pipe (b) through an air pipe (e) connected to the pipe Pi. After admission of the requisite supply of the mixture of petrol and air by pipe )61 to the combut:tion chamber, the valve (c) is closed and the mixture fired in the usual way, but by hand manipulation, the explosion of the mixture sufficing to properly start the engine. By means of the small air hole (di) in the syphon syphonage is automatically discontinued, when, for any reason, the balance wheel is stopped before the foil charge is drawn into the combustion chamber, the important feature in providing such air hole being that the petrol can only be drawn or syphoned out of the cup (al while the balance wheel and piston are moving, and as soon as they stop syphonage ceases. In this way the mixture is always properly supplied or sprayed to the combustion chamber, and ensures a Positive starting of the engine. The same device, slightly modified according to requirements, can be employed for supplying the combustible charge to the engine for constant running
The Yarmouth Town Council are proposing to adopt motor vehicles for their fire brigade work, in. which matter they are following the lead of Liverpool, Leicester, and other towns, where the successful use of these machines has been amply demonstrated.