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Richard Trevithick (April 13, 1771 – April 22, 1833) was a British inventor, engineer and builder of the first working railway steam locomotive.
1771 April 13th. Richard Trevithick born at Tregajorran the son of Richard Trevithick (Senior).
1771-90 See Richard Trevithick: Childhood.
1790 Trevithick's first job, at the age of 19, was at the East Stray Park Mine.
1792 He was associated with Edward Bull
1795 Re-erects an engine at Wheal Treasury
1796 Visits Soho Foundry with Bull and has injunction served on him for infringing the Boulton and Watt patents.
1796 Modifies the Ding Dong Mine engine to an atmospheric type
1796 Becomes acquainted with Davis Giddy later to become a close friend and adviser
1797 November 7th. Trevithick married Jane Harvey of Hayle at St. Erth. See Trevithick Marriage and Family.
1798 First engine sent to London in the care of Arthur Woolf
1799 As Richard became more experienced, he realised that improvements in boiler technology now permitted the safe production of high pressure steam, and that this could be made to move a piston in a steam engine on its own account, instead of using a pressure of close to one atmosphere in a condensing engine. He was not the first to think of so-called "strong steam", but he was the first to make it work, in 1799. Not only would a high pressure steam engine eliminate the condenser but it would allow the use of a smaller cylinder, thus saving space and weight. He reasoned that his engine could now be more compact, lighter and small enough to carry its own weight even with a carriage attached. (Note this did not use the expansion of the steam, so-called "expansive working" came later).
He started building his first models of high pressure (meaning a few atmospheres) steam engines, initially a stationary one and then one attached to a road carriage. Exhaust steam was vented via a vertical pipe or chimney straight into the atmosphere, thus avoiding a condenser and any possible infringements of Watt's patent. The linear motion was directly converted into circular motion via a crank instead of using an inefficient beam.
1801 Trevithick builds the Puffing Devil and drives it on the roads of Camborne.
1802 Anxious to prove his ideas, he built a stationary engine at the Coalbrookdale Co works in Shropshire, forcing water to a measured height to measure the work done. The engine ran at forty piston strokes a minute, with an unprecedented boiler pressure of 145 psi.
The company then built a rail locomotive for him, but little is known about it, including whether or not it actually ran. To date the only known information about it comes from a drawing preserved at the London Science Museum and a letter written by Trevithick to his friend, Davies Giddy. This is the drawing used as the basis of all images and replicas of the later Penydarren locomotive, as no plans for that locomotive have survived. The Puffing Devil was unable to maintain sufficient steam pressure for long periods, so in fact would have been of little practical use.
In 1802 Trevithick built one of his high pressure steam engines to drive an automatic hammer at the Penydarren Ironworks near Merthyr in South Wales. With the assistance of Rees Jones, an employee of the iron works and under the supervision of Samuel Homfray, the proprietor, he mounted the engine on wheels and turned it into a locomotive.
1803 He built the London Steam Carriage and demonstrated it in London.
1803 May 2nd. Trevithick sold a tenth of the patents for his locomotives to Samuel Homfray.
1803 September 8th. Greenwich Explosion. One of Trevithick's stationary pumping engines in use at Greenwich exploded, killing 4 men.
1804 February 21st. Merthyr Tramroad Trial.
1805 Hearing of the success in Wales, Christopher Blackett, proprietor of the Wylam Colliery near Newcastle wrote to Trevithick asking for locomotive designs. These were sent to John Whinfield at Gateshead, Trevithick's agent, who built what was to be Trevithick's second locomotive.
1805 Drives a canal barge by a steam engine and paddle-wheels
1806 Builds the first of three steam dredgers and works them on the Thames
1808 Builds the ' Catch me who can' locomotive and demonstrates it in London.
Trevithick went on to research other projects to exploit his high pressure steam engines: boring brass for cannon manufacture, stone crushing, rolling mills, forge hammers, blast furnace blowers as well as the traditional mining applications. He also built a barge powered by paddle wheels and several dredgers.
In 1808 Trevithick entered a partnership with Robert Dickinson, a West India merchant. Dickinson supported several of Trevithick's patents. The first of these was the ' Nautical Labourer'; a steam tug with a floating crane propelled by paddle wheels. However it did not meet the fire regulations for the docks and the Society of Coal Whippers, worried about losing their livelihood, even threatened the life of Trevithick.
1808 July 8th. Issues a challenge that his steam engine can beat any horse in a contest to be held at Newmarket in October. The engine can be seen in the fields adjoining Bedford Nursery near Tottenham Court Road.
In 1809 Trevithick worked on various ideas on improvements for ships: iron floating docks, iron ships, telescopic iron masts, improved ship structures, iron buoys and using heat from the ships boilers for cooking.
1810 Another patent was for the installation of iron tanks in ships for storage of cargo and water instead of in wooden casks. A small works was set up at Limehouse to manufacture them, employing 3 men. The tanks were also used to raise sunken wrecks by placing them under the wreck and creating buoyancy by pumping them full of air.
In 1810 a wreck near Margate was raised in this way but there was a dispute over payment and Trevithick was driven to cut the lashings loose and let it sink again.
1810 May. He caught typhoid and nearly died. By September he had recovered sufficiently to travel back to Cornwall by the ship the 'Falmouth Packet'.
1811 February 5th. He and Dickinson were declared bankrupt. They were not discharged until 1814, Trevithick having paid off most of the partnership debts from his own funds.
1811 He sells his tank patent to Henry Maudslay
c1812 Trevithick designed the Cornish Boiler. These types were installed in the Boulton and Watt pumping engines at Dolcoath Mine and more than doubled their efficiency. When the employees rebelled at the changes he dismissed them and put Jacob Thomas in charge.
1812 He installed a new 'high pressure' experimental steam engine also with condensing at Wheal Prosper. This became known as the 'Cornish engine' and was the most efficient in the World at that time. Other Cornish engineers contributed to its development but Trevithick's work was predominant.
1812 In the same year he installed another high pressure engine, though non-condensing, in a threshing machine on a farm at Probus, Cornwall for Sir Christopher Hawkins. It was very successful and proved to be cheaper to run than the horses it replaced. It ran for 70 years and was then exhibited at the London Science Museum.
1812 Produces the first practical plunger-pole pump and installs it at Wheal Prosper
In one of Trevithick’s more unusual projects, he attempted to build a 'recoil engine' based on the famous model built by Hero of Alexandria in about AD10. This comprised a boiler feeding a hollow axle to route the steam to a Catherine wheel with 2 fine bore steam jets on its circumference, the first 15 feet in diameter and a later model 24 feet in diameter. To get any usable torque, steam had to issue from the nozzles at very high velocity and in large volumes and it proved not to operate with adequate efficiency.
1812 Built a screw propellor for marine propulsion and applies for a patent. He ordered the castings for engine and propellor from Hazledine and Rastrick to be assembled by a London Millwright who were building the hull but it was not complete when Richard left for Peru and the millwright never completed the task.
1813 He built an engine for ploughing
In 1813 Uville set sail again for England and, having fallen ill on the way, broke his journey via Jamaica. When he had recovered he boarded the Falmouth packet ship 'Fox' coincidentally with one of Trevithick's cousins on board the same vessel. Trevithick's home was just a few miles from Falmouth so Uville was able to meet him and tell him about the project.
1814 September 1st. Nine engines shipped to Peru
1815 March. R. Trevithick and R. Dickinson of Fore Street, Limehouse, dealer in iron tanks, declared dividend (part of bankruptcy discharge?) 
1815 June 6th. Patent 3922 Engine.
Another of his projects was the plunger pole pump, a type of pump used with a beam engine and used widely in Cornwall's tin mines, in which he reversed the plunger to change it into a water-power engine.
1816 June 28th. Trevithick wrote that he had eleven engines of the plunger pole type working.
1816 October. Immediately before he leaves for Peru he sells half his rights in the plunger-pole engine to William Sims for £200.
1816 October 20th. Trevithick left Penzance for South America and is away for eleven years. Details at Richard Trevithick: South America
1827 October 9th. Trevithick arrived at Falmouth with few possessions other than the clothes he was wearing. Taking encouragement from earlier inventors who had achieved some successes with similar endeavours, Trevithick petitioned Parliament for a financial grant but he was unsuccessful.
1827 Designs a recoil gun carriage
1828 Visits Holland regarding drainage schemes
1828 October. 'Just after the invention of the steam-carriage which has been in use for the last 20 years on our railways, Mr. Trevithick publicly exhibited it on a circular rail-road constructed on purpose in the Bedford nursery grounds, now Euston square. He also, on the 3rd August in the same year, ran it, and won a large bet, against a race horse' 
1829 Built a closed cycle steam engine followed by a vertical tubular boiler.
In 1830 he invented an early form of storage room heater. It comprised a small fire tube boiler with a detachable flue which could be heated either outside or indoors with the flue connected to a chimney. Once hot the hot water container could be wheeled to where heat was required and the issuing heat could be altered using adjustable doors.
1830 Richard Trevithick of Hayle, Cornwall, Civil Engineer, became a member of the Institution of Civil Engineers.
1832 To commemorate the passing of the Reform Bill he designed a massive column to be 1,000 feet high, being 100 feet in diameter at the base tapering to 12 feet at the top where a statue of a horse would have been mounted. It was to be made of 1,500 10-foot square pieces of cast iron and would have weighed 6,000 tons. There was substantial public interest in the proposal, but it was never built.
About the same time he was invited to do some development work on an engine of a new vessel at Dartford by John Hall (of Dartford), the founder of J. and E. Hall. The work involved a reaction turbine for which Trevithick earned £1,200. He lodged at the Bull Inn, Dartford.
The last invention of Trevithick for which he took a patent on the 19th March, 1833, was for improvements in the steam-engine, and in their application to navigation and locomotion.
1833 After he had been working there about a year, he was taken ill with pneumonia and had to retire to bed at The Bull. After a week's confinement to bed he died on the morning of 22 April 1833. He was penniless and no relatives or friends had attended his bedside during his illness. His co-workers at Hall's works made a collection for his funeral expenses and acted as bearers and he was buried in an unmarked grave. They also paid a night watchman to guard his grave at night to deter grave robbers as body snatching was common at that time.
A statue depicting Richard Trevithick holding one of his small scale models, stands beside the public library at Camborne. It was erected on the route taken by Puffing Devil in 1801.
A full-scale replica of the world's first steam-powered locomotive is in Telford Central Station, Telford, Shropshire.
1803/4 Description of one of his earliest High Pressure Engines in The Engineer of 21st May 1920.
1804 The Engineer included photographs of a sample of 1804 rail from the Merthyr Tydfil Railway.
From the Gloucester Journal, 27th February 1804
'New-invented Steam Engine.—On Tuesday se’nnight one of Mr. Trevethick’s Steam-engines was set to work on the colliery of Alexander Raby, Esq. at Llanelly, Carmarthenshire. The base on which it stands does not exceed 14 feet by 12; the boiler is about 5 feet long by 4 in diameter, having its fire-place within, about two thirds from the top, which terminates with a chimney made of plate-iron, so that no masonry or brickwork appears necessary; on the top the boiler, a cylinder of 3 feet in length and 7 inches in diameter is fixed in a horizontal position, containing a piston and rod, which is alternately acted upon by the pressure of the steam from the boiler; which latter is instantly discharged on performing its operation, which it does with velocity of from 15 to 20 strokes in a minute, and may be reduced w.th ease to the slowest possible motion: the piston rod is connected with a crank, and its rotary motion maintained by the action of a fly wheel. The power of this engine is computed to that of four horses, but by an increase of steam might be made equal that of six: the piston is calculated to receive a pressure of 25lbs. to the square inch, which may be increased to 50lbs.- a power, however, not altogether advisable. The expence of fire to generate the ordinary pressure of steam does not exceed one cwt. of coal (to each horse power required) in the 24 hours: its action creates a pleasing astonishment, not being fettered with either condenser or air pump, and one simple cock or valve governing its whole motion; neither is it encumbered with the heavy gearing attached to most other engines. If any drawback appears to operate to the prejudice of this invention, it must arise from the apparatus being so much exposed to the weather, which must during several months in the year, materially operate against the generation of steam, and the perceptual accumulation of dirt on its working parts. But these are inconveniences which will doubtless not escape the attention of the ingenious inventor.
'On Tuesday last, a trial was another of these Engines at Merthyr-Tidvil, Glamorganshire, for the purpose of ascertaining its powers in drawing working carriages of all descriptions, on various kinds of roads; and it was found to perform to admiration all that was expected from it.—In the present instance, the novel application of steam, by means of this truly valuable machine, was made use of to convey along the tram-road 10 tons long weight of bar-iron, from Penydarran iron-works, to the place where it joins the Glamorganshire canal, upwards of 9 miles distance; and it is necessary to observe, that the weight of the load was soon increased from 10 to 15 tons, by about 70 persons riding on the trams, who, drawn thither (as well as many hundreds of others,) by invincible curiosity, were eager to ride, as the expence of this first display of the patentee’s abilities in that country. To those who are not acquainted with the exact principle of this new engine, it may not be improper to observe, that it differs from all others yet brought before the public, by disclaiming the use of condensing water, and discharges its steam into the open air, or applies it the use of heating of fluids, as conveniency may require. The expencc of making engines on this principle, docs not exceed one half of any the most improved plan, made use of before this appeared; it takes much less coal to work it, and it is only necessary to supply a small quantity of water for the purpose of creating the steam, which is a most essential matter. It performed the journey without feeding the boiler or using any water, and will travel with ease at the rate of five miles an hour.
'The gentleman alluded to in our last Paper, by whose spirited and active patronage the above valuable improvement has attained its present perfection, is Samuel Homfray, Esq. of Penydarran, near Merthyr-Tidvil.'
The following letter and details were published in The Engineer in 1879 in an article about steam engines at the Kilburn Royal Agricultural Show.
'Nearly all Trevithick's papers from 1803 to 1812 have been destroyed or lost but about 1812 he began to use two old mine account books as letter books, into which he copied rough draughts of his correspondence. The following letter was found in one of these books:- Hayle Foundry, February 13th, 1812.
To Sir Christopher Hawkins, Baronet.
Sir,-I now send you, agreeable to your request, a plan and description of my patent steam engine which I lately erected on your fann for working a thrashing mill. The steam engine is equal in power to four horses, having a cylinder 9in. in diameter. The cylinder with a moderate heat in the boiler makes 30 strokes in a minute! and as many revolutions of the fly-wheel, to every one of which the drum of the thrashing mill, which is 3ft. in diameter, is turned twelve times. The boiler evaporates nine gallons of water in an hour, and works six hours without being replenished. The engine requires only little attention- a common labouring man easily regulates it. The expense of your engine of 4·horse power compared with the expense of four horses is as follows :- £ s d
Original cost of steam engine . . . . . . . . . 80 0 0
Building material and rope. .. . . . .. . 10 0 0
Interest on the above, at 5 per cent. 4 10
Wear and tear, at 5 per cent. ... . .. 4 10
Original cost of horse machinery for four horses 60 0 0
Interest on the above, at 5 per cent. ... . .. 3 0 0
wear and tear, at 15 per cent. . . . . . . .. . ..9 0 0
£12 0 0
Two bushels or 164 lb., of coal will do tho work of four horses, costing 2s. oo. Four horses, :~.t 5s. ea.ch, gives 20s. Cost of coal 2s. 6d., as compared with 20s. for horses.
I remain, Sir,
Your obedient servant,
Accompanying this letter appears a copy of a report prepared by four individuals, called in as experts to report on the performance of the machine. The report runs as follows:-
Cornwall, Feb. 20th, 1812.
Having been requested to witness and report on the effect of steam applied to work a mill for thrashing com at Trewithen, we hereby certify that a fire was lighted under the boiler of the engine five minutes after eight o'clock, and at twenty-five minutes after nine the thrashing mill began to work, in which time one bushel of coal was consumed. That from the time the mill began to work to two minutes after two o'clock, being four hours and three-quarters, 1500 sheaves of barley were thrashed clean, and one bushel of coal more was consumed. We think there was sufficient steam remaining in the boiler to have thrashed from 50 to 100 sheaves more barley, and the water was by no means exhausted. We had the satisfaction to observe that a common labourer regulated the thrashing mill, and in a moment of time made it go faster, slower, or entirely to cease working; we approve of the steadiness and the velocity with which the machine worked, and in every respect we prefer the power of steam ns here applied to that of horses.
(Signed) MATHTEW ROBERTS, Lamellyn.
THOMAS NANKIVILLE, Golden.
MATHEW DOBLE, Bartlever.