Charles Vernon Boys

“ The Humber is less sen sitive in the steering, owing to the greater moment of inertia of the frame and the front rider. The front-steerer cannot be made safer, but an excellent tandem is formed by placing the rear-rider on a trailing tail as in the Humber. Tandems have an advantage over sociables and perhaps over single tricycles in the matter of speed; they are, however, not quite so safe, and their appearance alone prevents many from riding them. Many sociables and tandems are convertible into single machines with but little trouble. ”

“ It is steered by a cross handle, like the bicycle, and this method of steering, in spite of the fact that it boxes the rider into the machine, is becoming very general in front steerers in place of the rack and pinion steering hitherto in use. The Cripper is a very popular example. The brake is an important feature in roadster tricycles. It is always made to act on the box of the differential gear where that is used ”

“ By means of these it is possible to change the gear of the machine so as to have a high gear under favourable conditions and a low gear when mud, wind, or an ascent make travelling difficult. Although chain gearing is used in nearly every machine made, connecting rods, wheels, or bands are fitted instead to some machines. ”

“ Coventry chair " is a kind of bath chair driven as a tricycle by a rider behind. When invalids have overcome a certain prejudice as to the danger of this kind of vehicle, it will no doubt be more generally used. ”

“ The necessity for such mechan ism has been avoided by making the wheel axle also the treadle axle; but great instability is the result.
Machines in which the arms instead of the legs supply the power are maile, and are of immense service to those who have lost the use of their legs. ”