Patent GB-190224965-A (GB)
Title: Improvements in Clutch and Brake Mechanism.
Inventor: PARSONS JOHN
Filed: 1902-11-13
Granted: 1904-02-13
Abstract: 24,965. Parsons, J., Hare, C. E., and Sturgess, G. F. Nov. 13. Driving-mechanism ; brakes; clutches.-Relates to the clutch driving and brake gear described in Specification No. 1127, A.D. 1900. Fig. 1 shows the application of the invention to a cycle hub. A coned socket 7 is loosely mounted on a drum 1 secured to the hub, and has a milled face adapted to engage a corresponding face on the fixed cone 11 of the ball bearing. A helical coil 3 is mounted on the socket 7 and is formed at the ends with solid rings. One of these rings is fixed to the socket 7, and the other ring has helical teeth to engage corresponding teeth on the sprocket-wheel 2. An annular ring 16 screwed on the wheel 2 has a friction face adapted to engage a corresponding face on the drum. In forward driving, the socket 7 and ring 16 are forced, by means of the teeth on the wheel 2 and coil 3, into engagement with the drum 1 ; when the wheel 2 is stopped the coil 3 overruns, thereby bringing the friction faces on the drum, socket, and ring out of engagement and moving the socket into engagement with the cone 11, so as to allow the drum to rotate freely ; upon back-pedalling, the coil is moved along the socket into engagement with the drum to retard the same, the pressure being transmitted by the stay 14 to the framework of the cycle. In the arrangement shown in Fig. 3, two coils 21, 24 are mounted upon a coned holder or socket 28 arranged within the hub 19. The inner rings of the coils are coupled together by levers 30 pivuted on pins engaging the sockets 28. The sprocket-wheel 20, which is reversible and forms a cup for the balls 33<a>, is screwed to the outer ring of the coil 21. The outer ring of the coil 24 is formed with a friction face to engage the hub, and is coupled to the socket 28 by balls 27<a> located in recesses in the ring and socket and bearing upon the fixed cone 36. In driving, the coils are rotated so as to bring the friction face on the outer ring of the coil 24 and the balls 33<a> into driving contact with the hub 19 ; when the wheel 20 is stopped, the hub is released and runs freely over the balls 33<a>, 37, the coil 24 being clutched to the cone 36 ; upon back-pedalling the coil 24 travels up the inclined surface of the socket 28 and is forced into contact with the hub to retard the same. In a modification, a single coil is employed, one of the solid end rings being fixed to the coned socket and provided with a friction face to engage the hub, and the other ring provided with a coarse screw to receive a piece carrying the sprocket-wheel and acting as the cup for the balls. In the arrangement shown in Fig. 8, the coned socket 80 is made integral with the fixed bearing-cone. The ring 72 of the coil 71 is eccentric to fit an eccentrically-bored split ring 75 located in a recess in the hub. The other ring 72<a> has teeth 72 adapted to engage with teeth 70 on the piece 69<a> which carries the sprocket-wheel 69, and acts as a cup for the balls. In driving, the coil is turned to bring the ring 75 into driving contact with the hub 67 ; when the wheel 69 is stopped, the coil overruns and frees the hub, bringing the ring 72 into engagement with the socket 80 ; upon back-pedalling, the coil is forced up the inclined surface of the socket and brought into braking contact with the hub. Fig. 13 shows an arrangement in which the coil ring 86<a> has threads of the same pitch as the coil 87. The piece 88<a >to which the sprocket-wheel 20 is attached engages the ring 86<a>. The other ring 94 is formed with a friction face to engage the hub 19, and is adapted to be clutched to the coned socket 46. A split cover 89 is provided with teeth to engage the coil 87. In driving, the ring 94 and a cone 89<a> on the cover 89 are brought into driving contact with the hub ; when the wheel 20 is stopped, the ring 93 is clutched to the socket 46 ; upon back-pedalling, the coil is moved up the inclined surface of the socket and the cover 89 is moved into braking contact with the hub. In a modification, the socket is provided with inclined keys upon which the coil is arranged, one end ring of the coil being screw-threaded to receive the piece carrying the sprocket-wheel, and the other provided with milled teeth to engage with corresponding teeth on the holder. Fig. 15 shows a brake applied to a cycle. A coil 102, with solid inner and outer rings, is fixed between the bearing-cone 105 and the fork member 106, and is prevented from rotating by pins engaging the member 106. The outer ring of the coil carries a pin 112<b> to which is secured a wire. Upon pulling the wire, the coil is distended so as to bring the periphery of the ring into braking contact with a drum 101 secured to the hub. Fig. 17 shows a clutch suitable for use on a motor car. The driving-cone 113 carries a coil 114 with solid end rings 115, 116. The coil is free at one end and attached to the cone at the other end by a screw. A similar coil 119 is secured at one end to the driven socket 118. Owing to the arrangement of the coils, the clutch members come into engagement without shock.