No. 22. 49 inch 'geared ordinary,' introduced for the season of 1892, and made by the Crypto Cycle Co. Ltd., 47 Farringdon Road, London, E.C., successors to Ellis and Co.
Instead of the cranks driving the front wheel direct -” as in the ungeared 'ordinary,' the spindle carried a pinion: on the inner circumference of the hub was a ring of teeth; between these teeth and the aforementioned pinion was a set of three small pinions revolving on studs affixed to the hub-flange. By means of this mechanism (which was similar to that used in the high gear of a modern three-speed hub) the 49 inch driving wheel was geared up to about 62 inches.
This gear was a development of the Crypto Dynamic two-speed gear, invented by William Thomas Shaw and William Sydenham in 1882, patent No. 3230. With mechanism locked solid, the road wheel was -"geared- up or down according to the number of teeth on the driving and driven sprockets: with the pinion in operation a lower gear was brought into action.
This identical machine was a favourite mount of the late Mr. J. J. Henry
Sturmey, of Coventry, who for many years acted as Editor of The Cyclist
and later of The Autocar. On his death (8th January, 1930) it was presented
to the Bartleet Collection by his sister. Unfortunately the Boothroyd single-tube
tyres, with which it was fitted, were detached and stolen during transit
between Coventry and London. Weight, without tyres, 35.25 lbs.
No. 24. 'Alpha Bantam,' made by the Crypto Cycle Co. Ltd., 47 Farringdon Road, London, E.C., 1896. This marks the last of a series of attempts to maintain the popularity of front driving against the irresistible advance of chain drive on the rear wheel, Mr. I. W. Boothroyd being the most persistent advocate of the former system, vide his association with the 'Facile,' 'Geared Facile,' 'Geared Ordinary,' 'Front Driver,' and three types of 'Bantam,' of which the Alpha marks the final development.
As Mr. Boothroyd says in his letter which is attached to this exhibit: "The chain-driven rear-driving bicycle, which ultimately became universal." Presented by the late H. E. Grist, F.O.T.C. Weight 29.5 lbs.
If you have further information or a query related to this page, please contact us>