One of the most curious of the wind vehicle productions that held the fancy of scientists to a slight extent in the early part of the nineteenth century was the charvolant or kite carriage that was devised by George Pocock in 1826, and built by Pocock and his partner, Colonel Viney. This was a very light one-seated carriage, drawn by a string of kites harnessed tandem. With a good wind these kites developed great power and it is said that the carriage whirled along, even on heavy roads, at the rate of a mile in three or even two and one-half minutes. Once Viney and Pocock made the trip from Bristol to London, and they often ran their carriage around Hyde Park and the suburbs of London. As the wind could not always be depended upon the charvolant was provided with a rear platform, upon which a pony was carried for emergencies.
Samuel Brown
In 1826, Samuel Brown applied his gas-vacuum engine to the propulsion of a carriage, which was effectively worked along the public roads in England. It even ascended the very steep acclivity of Shooter’s Hill, in Kent, to the astonishment of numerous spectators. The expense of working this machine was, however, said far to exceed that of steam, and this formed a barrier to its introduction. Experiments with this engine for the propulsion of vessels on canals or rivers were also made by the Canal Gas Engine Company. Brown patented a locomotive for common roads in 1823.
James Neville
In January, 1827, James Neville, an engineer of London, took out a patent for a “new-invented improved carriage,” to be worked by steam, the chief object of which appears to have been to provide wheels adapted to take a firm hold of the ground. He proposed to make each of the spokes of the wheels by means of two rods of iron, coming nearly together at the nave, but diverging considerably apart to their other ends, where they were fastened to an iron felly-ring of the breadth of the tire, and this tire was to be so provided with numerous pointed studs about half an inch long as to stick into the ground to prevent the wheel from slipping round. A second method of preventing this effect was to fasten upon the tire a series of flat springing plates, each of them forming a tangent to the circumference, so that as the wheels rolled forward each plate should be bent against the tire and recover its tangential position as it left the ground in its revolution. It was considered that the increased bearing surface of the plate, and the resistance of its farthest edge, would infallibly prevent slipping. For propelling the carriage Neville proposed to use a horizontal vibrating cylinder to give motion direct to the crank axis by means of the compound motion of the piston rod, as invented by Trevithick, the motion to the running wheels to be communicated through gear of different velocities.
T. S. Holland
Among the singular propositions for producing a locomotive action that were brought out early in the eighteenth century was that invented by T. S. Holland, of London, for which he took out a patent in December, 1827. The invention consisted in the application of an arrangement of levers, similar to that commonly known by the name of lazy-tongs, for the purpose of propelling carriages. The objects appeared to be to derive from the reciprocating motion of a short lever a considerable degree of speed, and to obtain an abutment against which the propellers should act horizontally, in the direction of the motion of the carriage, instead of obliquely to that motion, as is the case when carriages are impelled by levers striking the earth.
James Nasmyth
Born in Edinburgh, Scotland, August 19, 1808. Died in South Kensington, England, May 6, 1890.
While yet in his teens James Nasmyth showed great mechanical ability and constructed a small steam engine. In 1821, he became a student at the Edinburgh School of Arts. Six years later he had made a very substantial advance in his experiments. The story of what he endeavored to accomplish is best told by himself. In later life he wrote: