Patent GB-189819736-A (GB)
Title: Improvements in Motor-cycles and other Motor-driven Vehicles.
Inventor: SANGSTER CHARLES THOMAS BROCK
Filed: 1898-09-17
Granted: 1899-05-13
Abstract: 19,736. Sangster, C. T. B. Sept. 17. Motor road vehicles.- Relates to improvements in motor cycles, parts of which improvements are applicable to other motor - driven vehicles. Figs. 1, 8, 10, and 23 show the application of the invention to a motor tricycle. The front part of the framing is of the ordinary diamond pattern. Back stays a<6> run from the saddle pillar clip to the ends of the rear wheel axle. The motor and driving gear are supported upon a framing b formed by a pair of short stays b<1>, b<2> running from the bottom bracket a<5> and terminating in a cross-piece b<3> which is connected by stays b<5> enclosed within tubes b<4> to the gear casing. The carburetter d, preferably of the form described in Specification No. 13,704, A.D. 1898, is located between the forward framing and has a portion d<8> partitioned off for electrical ignition apparatus. It is provided with a mixing-valve controlled by a lever d<1> and a second lever d<3> for controlling the air supply. The explosive mixture is delivered by a pipe d' regulated by a valve controlled by linkwork from the lever d<7>. The motor works on the four-stroke cycle principle. The crank box is made in two parts, and is provided with lugs to connect it to the frame. The crank shaft is provided with a flywheel, and also with a pinion to drive the large toothed ring m<1> of the differential gearing. A pipe i<9> leads from the exhaust outlet to a silencer h<1>, and a branch pipe leads from thence to a worm &c. located in the vaporizing- chamber of the carburetter. The large driving toothed ring m<1> is connected with balance gearing on the main axle, Figs. 1 and 8, which is of the type known as the "Starley tricycle axle." The axle is made in two parts q<1>, q<2> enclosed in fixed sleeves q<3>, q<4>, and has the parts connected together at the centre by a balance gear. The inward ends of the parts q<1>, q<2> are provided with pinions r<6>, r<7>, and a rotating sleeve r<3> surrounding the ends carries four spindles r<8>, r<9>, r<10>, r<11> carrying loose pinions r<12>, r<13>, r<14>, r<15>. The pinions r<12>, r<14> engage the pinion r<6>, and the pinions r<13>, r<15> engage both the pinions r<12>, r<14> and the pinion r<7>. One end of the sleeve r<3> is connected to the toothed ring m<1> gearing with the motor pinion, and the other end carries a sprocket-wheel n connected by a chain n<2> to the pedal driving-mechanism. Suitable ball bearings are provided for the parts. The gearing is enclosed in a casing s provided with a removable end s<3>, and has lugs s<4>, s<5> in which the framing bolts b<5> engage. The pedal-crank axle t<1>, Fig. 10, is mounted in a sleeve t<2> mounted eccentrically in the bottom bracket so as to permit of chain adjustment. The sprocket-wheel t<7> is connected to the crank axle by clutch mechanism, so that the pedals may remain at rest when not required. A friction disc t<5>, provided with tapered recesses, is mounted upon the crank boss, and a clutch ring t<8> is screwed into the sprocket-wheel. Rollers t<13> are placed in the recesses in the disc t<5>, and an outer plate t<9> secures the whole in position. When the pedals are operated in the forward direction, the rollers wedge themselves between the disc t<5> and the ring t<8>, and set up a driving connection between the parts. According to the Provisional Specification, spring pins and pawl pieces are employed to form the clutch mechanism. A pair of band brakes, Fig. 23, may be employed which are operated by a single lever fulcrumed to the handle-bar. Each of the brakes consists of a drum v secured to the inside of the road wheel and encircled by a leather-faced steel band v<1>, one end of which is made fast to a bracket &c. v<2> attached to the frame, while the other is attached to a lever which is connected by rods and bell-crank levers to the handle-bar lever. The brake may be arranged so as to be operated by the rider's foot.