Patent GB-190208864-A (GB)
Title: Improvements in Brake-gear and Free-wheel Driving Mechanism for Cycles.
Inventor: COLE THOMAS HENRY
Filed: 1902-04-16
Granted: 1903-04-09
Abstract: 8864. Cole, T. H. April 16. Brakes ; clutches.- Relates to brake mechanism such as that described in Specification No. 19,223, A.D. 1901, in which front and rear wheel bicycle brakes are applied simultaneously by back-pedalling or by hand. Fig. 1 shows a form of front-wheel brake in which brake blocks 1 are secured at 7 to a U-shaped stirrup of L-, T-, or other section, having triangular sides 2<a>, 2<b>, 2<c> pivoted at 5 to the fork members. The brake is applied by a looped cord 26 secured to the stirrup and passing round a pulley 25 connected to the actuating-cord 8. A plate spring 12 retracts the brake. The loop 26 may be secured to the cord 8, the pulley 25 being mounted on the stirrup, and the sides of the cord passing round one, two, or more guide - pulleys mounted on, or under, or at each side of, the steering-post and fork crown. In other forms the cord 8 passes direct to the stirrup. It may be guided by pulleys mounted, as shown in Fig. 8, between plates 15, 16 secured under the fork crown, and mav be secured to a block 24 sliding in a cylinder 21 secured behind the fork crown, and pressed forward by a spring contained in the cylinder. The mud guard may be screwed to the plate 16. The stirrup may be arranged behind the forks so that the brake is applied when it is moved forwards. In this case the cord 8 may pass from the stirrup forwards and round a pulley carried by an arm pivoted to the fork crown, then rearwards and over a pulley mounted on the bottom tube. A loop 26 may be used, the looped cord passing from the cord 8 round pulleys mounted side by side or one above another in the fork crown, then rearwards and round a pulley mounted on the stirrup. The looped cord may be attached to the stirrup, the pulley then being secured to the cord 8. The stirrup, Fig. 1, may be actuated by a cord passing over a pulley on the handle-bars, then down the steering-post and over a pulley 50, Fig. 15, and through a guide 52 to the bottom bracket. The pulley 50 is mounted in a tube 51 carried in ball bearings 53, 54 in the steering-post, and prevented from sliding downwards by a cross-pin 55 engaging an eye 56 on the sleeve. The cord 8 passes rearwards to an actuating-arrangement, and thence to a rear-wheel brake similar to the front-wheel brakes described above and mounted on the upper or lower forks. In one form of actuating-appliance, Fig. 16, the cord 8 passes round pulleys 62, 63 mounted on a sleeve 64 carried by the crank axle and actuated therefrom by a suitable back-pedalling clutch. In another form, the cord passes round a pulley connected by a link to an arm formed on the sleeve 64. In another form, shown in Fig. 18, the cord passes over a pulley 74 mounted between the chainstays, then round a pulley 65 carried by a bellcrank lever 71, 73 pivoted at 72 and actuated by an arm 68 on the sleeve 64. In another form, the cord passes from the front, round the pulley 65 on the arm 68, then round a pulley on the chainstays, then back round a second pulley on the arm 68, and over a second pulley on the chain-stays, to the rear brake. In another form, the pulley 65 is mounted on a link pivoted to the arm 68, and in another, the second pulley is connected by a link to the arm 68, the cord in this case passing round the pulley 65 last, and then passing up to the back stays. In another form, the pulley 65 is carried by a link pivoted to one arm of a bell-crank lever pivoted on the chain-stays and formed with teeth adapted to be actuated by a toothed portion of the sleeve 64. The cord passes from the rear brake on the chain-stays, over the pulley 65, under a pulley pivoted to the bottom bracket and thence to the front brake. In a modification of this form, the rear arm of the bell-crank lever is formed as a plate carrying two pulleys, the cord passing under one and over the other. In this form, a block secured to the cord slides in a slot in the plate and prevents both brakes from being thrown out of action if the cord snaps. Fig. 24 shows a form applied to a motor cycle having no cranks, the feet resting on one arm 71 of a bellcrank lever pivoted at 72 and carrying the pulley 65. The cord passes from the rear brake over a pulley 76 on the chain-stays, then round the pulley 65, back over another pulley on the chain-stays, and under a pulley 77 on the lug 61 of the frame. In a modification applied to a drop-frame motor cycle, the arm 71 extends backwards, and the pulley 65 is connected by a link to the short arm 73. In the forms in which a balance pulley 65 is used, means shown in Figs. 26 and 27 are empluyed to limit the movement of the pulley. A block 94, secured to the cord which is wound twice round the pulley, engages in sockets 95, 96 formed respectively in the pulley and in a U-shaped piece 97 secured to the pulley, and adapted to engage a pin 99 or other part on the frame carrying the pulley. The cord 8, as shown in Fig. 33, may pass inside the frame members and be actuated by a drum 120 mounted in ball bearings on and connected by a clutch with the crank axle, the loop of the cord passing round the drum and over pulleys carried on flats formed on the drum and round a pulley mounted in a frame. In this form, the cord is fitted with blocks 94 to engage a staple 94<a>. The clutch may comprise a rod sliding in the axle and formed with teeth adapted to engage ratchet teeth formed in the drum or sleeve. During forward driving the rod slides to and fro in the axle. In a modification, the rod slides in guides formed in a sleeve secured to the axle, and is formed with an elongated slot which embraces the axle. Fig. 36 shows another clutch, in which pawls 142 mounted in a sleeve 141 secured to the axle 60 bear on a loose ring 144, which causes the depression of one pawl to raise the others ready to engage with lugs 145, on back - pedalling. The clutches are also applicable as free-wheel driving- clutches.