Robert Cooper Grier

“ The incessant vibration felt in travelling on railroad cars is mainly imputed to the minute obstructions which unavoidably exist, and the approximation of the wheels necessary to avoid friction tends to increase the effect of this motion, and its power to derange the machinery of the road. ”

“ If the construction given by the court to the specification be correct, and in fact the only construction of which it is capable, as we think it is, it would be wholly superfluous to examine experts to teach the court, what they could clearly perceive without such information, that the necessity for coned wheels to avoid friction on curves was a consequence of the fact that the wheels were fixed to the exle. ”

“ These wheels may be connected by a strong spring, double the usual strength employed for ordinary cars. The use of this spring, though preferable, is not absolutely required, as the end in view may be obtained by constructing the bearing carriages in any of the modes usually practiced, provided the fore and hind wheels of each of the carriages be placed near together; because the closeness of the fore and hind wheels of each bearing carriage, coupled remotely from each other, is considered as the most important feature of the invention. ”