Tag Archives: Cornish beam engine

The only Cornish Engine House in the USA

PresidentPostcardThe President Engine House

This series of posts on the President Steam engine in Philadelphia has led me far further then I expected. It started off with a desire to expand my knowledge of  an engine with William West links; to gain some knowledge that I could use in future talks about the Last Great Engineer.  And now I find myself writing about probably one of the most significant Industrial Heritage sites in the USA.   In this post I bridge the gap between the past and now with a description of the engine house, the structure that links today’s modern landscape with its history.

The remains of the  President’s engine house stands in Allentown Philadelphia, a very long way from where I write this blog in Cornwall. Therefore I will  use the words and images from Mark Connar’s excellent paper on the Ueberroth Zinc Mine to describe the structure.

The Engine House described

“The square shaped pumping engine house is built of Potsdam Sandstone and is three stories high with the first floor at the elevation of the air pumps and condenser, the second floor near the top of the cylinder, and the third at the level of

President2017

The engine house in 2017

the beams. Overall the structure is 40 feet high. The north wall (called the “bob” wall in Cornish pump house design parlance), which supported the beams, is 9 feet thick with slots for the two flywheels, the south wall contains the cylinder opening, above which is the steam inlet and recesses for the two spring beams. This wall is also 9 feet thick and the other two walls (east and west) are 4.5 feet thick. Two square stacks that served the engine’s 16 boilers occupy the rear corners (face Old Bethlehem Pike). The boilers were housed in an adjoining building. The house plan is dominated by a central masonry platform, to which the engine was anchored, with large pits on either side for the flywheels and cranks.”

President2017_2An indication of the sturdiness of this structure is that it sits on a rock formation 114 feet below ground surface and the foundation for the engine is thirty-two feet below the rock face. Another Cornishman named Simeon Noell was charged with the responsibility to oversee the engine house erection that commenced in 1868. Overall, the structure is very typical of engine houses that populate the Cornish and West Devon landscape in the United Kingdom.

The basic structural design is highly functional and little changed from the enginePresidentWingwall houses first built in the early decades of the 18th century. The President was a “house-built” engine in that the engine house was an integral part of the engine, supporting it rather than simply providing weather protection for equipment and staff. The foundation is sturdy; it had to be capable of withstanding the stresses the engine could produce. The “bob-wall” carried the main weight and thrust of the engine. The interior layout of the pumping engine house was a basic Cornish pattern. The first floor, or bottom chamber, was known as the “driving floor” because it accommodated the throttle and other controls. Here the engineers had access to the lower portion of the key equipment. The second floor or middle chamber allowed access to the cylinder head and upper valve chest. The third floor was called the “bobloft” was this level allowed access to the beam for servicing and also held tackling gear used to lift heavy parts of the pump when repairs were necessary.”

The Engine house today

“The current condition of the engine house is derelict. It is enclosed by a security President2017Bobfence and is overgrown with vegetation. The brick chimney stacks are no longer standing (I have observed this structure for over 50 years and do not recall ever seeing the brick stacks, however, they are visible in photographs from the 1930s and early 1940s). The structure is best viewed in the fall and winter when less obscured by vegetation. The pumping house is the only visible remains when viewed from outside the gated area, however, a report by Professor Miller of Lehigh University prepared in 1923 indicated that an office structure was also remaining on the site.” Mark Connar

This now seems to be an appropriate place to take a quick detour from the President Engine, and look at some Cornish engine houses over here in Cornwall for a comparison. So its time to start digging into some of the hidden depths of my laptop filing system and see what suitable images I have hidden away.  So if you are reading this blog from across the pond please keep following, as I hope some of the photos may hint at the potential of this amazing building hidden away in Philadelphia. 


51tRtgzctrL__SL160_PIsitb-sticker-arrow-dp,TopRight,12,-18_SH30_OU02_AA160_ The engine house featuring on the cover of the Kindle Edition of William West of Tredenham is that of the famous Austen’s Engine at Fowey Consols, in mid-Cornwall. This 80″ engine was fitted with a lattice beam similar to the one used by the President,

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 The President Steam Engine described

 A Cornish engine in the USA

Now this series of posts on John West’s massive steam engine arrives at the point where it digs into the technical details. I have extracted various facts from the Damian Nance’s article, sifted, sorted and summarised to give a summary of the engine.

What was the President Engine?

The President was a rotative double acting engine with a 110″ cylinder, a 10 foot stroke screenshot_2017-06-13-12-07-40_kindlephoto-18444209.jpgand weight of 675 tons Although described as a Cornish engine, but had many features not common to pumping engines in Cornwall, i.e. it was rotative had flywheels, and was  double acting.

The engine was named after president Ulysses S. Grant, who had been invited to its dedication but  then failed to arrive.

Who built the engine?

The Cornish Engineer John West built the engine (the nephew  of William West, the Last Great Cornish Engineer), and its components were built by various companies in Eastern USA. Merrick and sons built the engine at their Southwark factory Philadelphia, but  much of the casting was  done at Lazell Perkins and co Bridgewater Massachusetts. The Pumps, boilers and  mountings were produced by  LP  Morris and co, Philadelphia.

Click here for information on Merrick and sons on the Philadelphia encyclopedia>

What did the engine do?

The engine was built to pump large quantities of water from a relatively shallow  mine shaft. Accounts of the engine differ in the number of pumps installed. Some state two pair, some three. Each pair of pumps consisted of a  lifting pump at the bottom of the shaft, and a 30″ plunger pump part way up. The lifting pumps were only  at a depth of 127 feet, very shallow compared to the Cornish mines of the time which were down to thousands of feet deep. The engine pumped at  15000 gallons per minute at 12 strokes per minute, and discharged into an adit and into a tank for use as boiler and condenser feed-water.

 

How was the steam provided?

screenshot_2017-06-13-12-11-46_kindlephoto-18656545.jpg

The three roofs of the boiler house.

An engine of this size demanded large quantities of steam, and so it had an impressive array of boilers. The President was served  by 16 boilers in a boiler house to the rear of the engine house, each boiler was 50 feet long with a 36 inch diameter.

The engine was designed to run at 60 psi at which pressure it produced 3000  horsepower, although in use it was normally run at a lower pressure.

What was the key features of the President Engine?

Apart from its sheer size the President had several interesting features that set it apart from the standard arrangement of a pumping engine back in Cornwall. These differences arose from the shallow depth of the mine. Engines running expensively on the Cornish cycle are more effective if they have a load of the heavy pump rods in the shaft. To replace this John West designed the engine with large 92 ton flywheels of over 30 foot diameter. For smoother operation of the flywheel West made the engine double acting (powered on both up and down strokes).

Note: The weight and diameter of the flywheel has been shown differently on some engine descriptions.  These figures have been confirmed as the most likely to be correct by Mark Connar, who I thank for the additional information.

screenshot_2017-06-13-12-07-40_kindlephoto-18481234.jpg
Although he installed Cornish style steam valves, the operating method was unusual. Valve operation was through cams fitted on the flywheel shaft, three cams for three different values of cut-off. The  throttle valve was fitted with an automatic control using a block of wood in the sump of the shaft connected by wire to the valve. An ingenious arrangement that allowed more steam to enter the engine as the water level rose.

screenshot_2017-06-13-12-11-12_kindlephoto-18516640.jpg

The lattice beams

These are the features that attracted me to the engine. Although Open-work beams are graceful and light, they did not become widely adopted. Their main user was John West’s Uncle, William West of Tredenham. All of his most important engines used this design, and it is no doubt the family influence that resulted in their distinctive form being adopted for the President.

Reference

Damian Nance, The International Steam Engine Society Bulletin volume 34 no 4

 


wpid-westcover.jpg The story of William West is told in the Trevthick Society papaerback ‘The Last Great Cornish Engineer‘.

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The President Steam Engine- Key dates

A Cornish Engine in the USA

These dates have been derived from a quick dip into Damian Nance’s article on the engine, and correspondence from Mark Connar; I dived in, grabbed a few dates and sorted them out into an order. Then to add some context I have added a few dates from the life of William West, John West’s famous uncle.

Events leading up to the engine’s creation

PresidentBW

1801 William West is born at Dolcoath

1835 Austen Engine’s Trial

1838 East London Waterworks engine started

1845 A rich zinc ore deposit in the dolomite limestone of Saucon Valley was discovered

1853 A  predecessor company to the Lehigh Zinc Company was formed to extract and smelt this primary material.

1854 Ueberotth mine was opencast operation

1860 Lehigh Zinc Company formed

1866 John West erected a 32″ double acting engine

1868  the Company’s engineer, John West from Cornwall as commissioned to design an engine capable of pumping 12,000 gallons/minute from a depth of 300 feet.

By 1869 three different engines were being used to clear the mines of water

The Engine’s operating years

1872 The President  was erected

1874 the engine’s crank broke and it took a number of days for it to be repaired and there was concern that the mines would fill with water.

1876 Operations were suspended

1879 William West dies

The President’s later life

1881 One of the owners of the Correll Mine in Friedensville purchased the mining assets of Lehigh Zinc and unified them under the name “Friedensville Zinc Company”

1883 New shafts were being dug and that the plan was to move the President to the new shaft location. This equipment move never transpired.

1884, Water was controlled in the mines by using two new steam pumps with the President was being kept in operational condition as a backup pump. Later that year, in May, the President was restarted.

By 1890 The Ueberroth mine was no longer being worked and the President was being used to lower the water in the other, still active, mine works.

1891 The last reported time that the President Pump operated

Events after the engine’s final steaming

1898 Unsuccessful efforts were made to raise capital in Europe to restart the Friedensville mine.

1893 All mining activities in the Friedensville area ceased

1899 The President was for sale

1900 The President was sold to Philadelphia based scrap dealers for $10,000

1901 The sixteen boilers were removed from the site to South Bethlehem by the New Jersey Zinc Company. The plan was to reuse these equipment pieces at other New Jersey Zinc mines.

1940s A new Friedensville mine was opened by the New Jersey Zinc Company which operated until 1983

Other Time Lines on this blog


51tRtgzctrL__SL160_PIsitb-sticker-arrow-dp,TopRight,12,-18_SH30_OU02_AA160_Sketch of the life of William West of Tredenham

This publication describes the life and work of John West’s uncle through the eyes of a Victorian biographer.

Available on kindle>

The paperback “Last Great Cornish Engineer” explores the Engineer’s life beyond the words of the sketch.

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Where is the President Steam Engine?

Sat here in Cornwall its very hard to imagine the location of the President Cornish Engine house, many miles away across the other side of the Atlantic.  In this blog I will therefore delve into the wonders of the internet to  pin down this important reminder of Cornish engineering in the USA.  Have a go at armchair mine exploration.

Damian Nance in his article in the International Steam engine Society Bulletin describes the engine’s location as:

“On the south-eastern outskirts of Allentown, Pennsylvania, just over half a kilometer south of interstate 78”

Where is Allentown?

My first stop, was  to use google Earth to find Allentown-

allentown

Click here for map>

Where is the engine house?

Mark Connor describes the engine house’s location as

“The remains of the massive pump which provided water control for the mine consist of the stone walls of the engine house structure and they are located on the south west corner of Old Bethlehem Pike and Center Valley Parkway in Friedensville, Upper Saucon”

Using this information, and some wandering around google maps, I managed to find its location, and here it is on Google earth:

PresidentEHGE

This view looked promising,  a large flooded working with some obvious mine waste surrounding it, but no obvious engine house. But, When I clicked on the  google earth 3D button, and wandered around...and there it was!

PresidentEH3dGoogle

Stood on the edge of the flooded workings, surrounded by trees was the massive walls of the house. I next tried street view, but no how many times I wandered the roads around the location using googles little yellow man, I could not grasp a glimpse of the engine house remains. There is just far too much vegetation obscuring the view.

PresidentEH3dGoogle2

Now that I have tracked down where the mine is, my next task in this series will be to explore when the engine operated, to link its time line with that of William West. However, after that little journey into the world of Google Earth I am tempted to have a few more hunts around the world for Cornish Engine Houses.

 

 


 

wpid-wp-1435842521499.jpeg For an exploration of a Victorian Cornish Mining Map download a sample of my Kindle edition of The Liskeard Mining District in 1863.

Prime members can borrow the book for free.

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Some threads in history and the last Great Cornish Engineer

Notes and musings for the Friends of Luxulyan Valley William West talk.

This is post is a resource for all those who attended my talk in March 2017 in the Luxulyan Valley, an area rich in William West’s History.  The post follows the order of the presentation, contains links to references within the Navbooks blog, along with a few facts, figures and dates.  

If you did not attend the presentation, then feel free to wander among the links on this page, and perhaps enjoy forming your own conclusions about the significance of the Austen’s engine trial.

wpid-screenshot_2015-08-21-17-43-45.pngThread one-The Steam engine Duty race

Steam engine development in Cornwall

  • Newcomen engine first used at Wheal Vor in 1715
  • The first James Watt engines in Cornwall  1777

The Cornish engine

  • 1812 the first high pressure condensing engine

Duty

Number of pounds of water raised one foot by an engine using one bushel of coal.

The Duty race

  • 1811 Lean’s Engine reporter started publication, Maximum duty recorded  22.3 Million
  • 1815 Woolf’s compound 50 Million duty

Click here for a post on Lean’s Reporter and some layers of history>

Samuel Grose

Click here for  more information about Samuel Grose>

  • 1825 Grose erected his engine at the Wheal Hope Mine .  This engine first introducedTowanHeather the concept of insulating the  the cylinders, nozzles, and steam pipes, an introduction that greatly improved the efficiency of the engine.
  • 1827 Grose’s 80″ at Wheal Towan is recorded at 67m.

Thread two- J.T Austen

Click here for some key dates in Austen’s life>

Austen before the engineaustin

  • 1782 Austen is born
  • 1778 His Mother inherited estate from her brother
  • 1803 He came of age, and was managing the family estate, which was not in a good condition
  • 1814 Early evidence of Austen investing in mining ventures.

Fowey Consols is formed

Click here for information about Fowey Consols>

  • 1816 Austen buys shares in Wheal Treasure, this would later develop into Fowey Consols.
  • 1822 Wheal Treasure, Wheal Fortune and Wheal Chance combined as Fowey Consols

Fowey  Consols success

  • The total production of copper from the mines between 1815 and 1836 was 383,359 tons which brought in sales of £2,247,478.

A new engine is required

Thread three- William West

The engineer is born

Click here for some key dates in William West’s life>

  • 1801 William West is born at Dolcoath

Influences

Click here for the story of West and Trevithick>

  • 1808 West holds a candle for Trevithickw6

Dolcoath and engineering

  • 1817 to 1819 West works at Dolcoath fitting shop

West becomes and engineer

  • 1822 West is chief working engineer at South Roskear and other mines

Wheal Towan

  • 1828 Grose achieved 87m with his Towan engine, trial is demanded, a trial is run.

Click here for information about West and the engine at Wheal Towan>

  • 1831 West was Engaged by  J. T. Austen at Fowey Consols and Austens Engine was austinpanfirst proposed
  • 1833 The contract for Austen’s engine signed

The threads converge at Austen’s engine

Click here for information on Austen’s engine trial>

Fame and controversy

Click here for a letter from James Sims>Click here for a letter from James Sims>

“I have no doubt that at least all practical engineers will agree with me, that it is perfectly absurd to think of making a fair trial of the duty of a steam engine (working under similar circumstances as the engine in question), in the short time of 24 hours” James Sims

A diverging thread, wealth

West is sought after

Click here for information of William West’s Caradon mines>

Properties

Click here for some maps showing some of William West’s properties near St. Blazey>

  • 1848 St. Blazey foundry built by West
  • 1852 Tredenham House is built

 

Beyond engineering

  • 1864 Liskeard Bank is founded

Click here for information about Liskeard Bank>

Phoenix Unitedwpid-th-5.jpeg

  • 1868 West gains majority shares in Phoenix United Mine

Click here for information about William West and Phoenix United Mine>

Click here for information about Phoenix United Mine>

  • 1898 Phoenix United closes.

A diverging thread-innovation

Steam Capstan

Click here for information about the steam Capstan>

  • 1835 Installed at South Hooe mine

Horizontal whim

  • 1843 Installed at Par Consols

Sims compound

Click here for some information about the Sims compound engine>SimsCoverClose2

  • 1843 The Sims family granted West the licence to build the Sims compound engine, and West installed several large engines of this design in Devon and Cornwall.

Open work beams

Click here for some information about William West’s open work beams>

Click here for information about the President engine ( external link)>

  • 1846-1849 Cruquius engine 144″

 

“In 1869, the company’s engineer, Cornishman John West, was asked to design an engine capable of pumping 12,000 gals/min from a depth of 300 ft. His engine, a condensing, double-acting rotative beam engine weighing 675 tons, was unique, but proved to be as successful as it was gargantuan. With a 110-inch cylinder and two latticework beams, the engine worked pump rods in the shaft and a pair of huge flywheels inside the engine house.”NANCE, R. Damian,

The man engine

Click here for information about the Man engine>

Click here for information about the Loams>

man%20engine

28th July 1851 William West engine at Fowey Consol’s started

  • Powered by a  30 foot diameter water wheel, 12 foot strokes
  • Co-designer John Puckey
  • 1872  South Caradon engine installed
  • 20 October 1919 Levant man engine disaster

 

A final diverging thread- the engine

Austen’s engine performance

  • 1840 Hocking and Loam’s 85″ engine at Taylor’s United mine achieves 107m, the largest figure recorded in Lean’s
  • 1850s onwards-duties decline the battle is over.
  • 1905 The last issue of Lean’s is published.

Click here for some information about the engine reporters>

 

The old Ford engine startsw13

Click here for information about the double beat valve>

 

The double beat valve

Cholera

1866. Cholera’s final onslaught came through water provided by the East London waterworks


Reading list for William West of Tredenham

Click here for some recommended books on Amazon>

wpid-50150fcb361d2756f4bd40336f24004a.jpgIf you are passing through Liskeard then pop into The Book Shop to buy a copy of  The Last Great Engineer in their excellent local history section.

 

NavsBooksStore

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Austen’s Engine Trial

austens2010The focal point of my talk at Luxulyan has to be the Austen engine at Fowey Consols. This post explains why.

An historic event at Fowey Consols

Overlooking St. Blazey Gate in Cornwall on October 22nd 1835 a crowd of the respectable, skilled and knowledgeable gathered to witness an event that would be a landmark in steam engineering history. It would be an event that  would change the life forever of its engineer, enshrine  the name of a landowner in history, bring wealth to a famous foundry  and have have impact  wherever water needed to be pumped in Britain.

Austen’s 80″ Cornish steam engine at Fowey Consols was at the center of the event.  Expert witnesses watched as coal stores were measures, stores locked, meters read, machinery inspections conducted and measurements taken. The objective of the day was simple to measure the efficiency of the engine in its ability to pump water out from the depths of the mine hundreds of  feet below its foundations.dscf9312

As an activity this was not unique, for since 1811 all over Cornwall engines’ efficiency had been measured, recorded and published. ‘Duty’ was the unit of measurement used, and a publication now refereed to as  ‘Leans Engine Reporter’ publicly shared the results; results that had driven a technology race in Cornish Mines.

What made the measurement of duty at Austen’s engine in 1835  was that this was a trial to prove or disprove the claims of duty being made for this engine. This was an engine whose arrival within the tables of Leans was with figures that outperformed all the existing  famous engines in Cornwall.  In addition its joint engineers, William West and William Petherick were relatively unknown in the public arena. The pair did not have a record of high performing engines, and their arrival straight to the top of the league tables sparked disbelief and accusations of foul play. And so the trial was organised, to prove in controlled conditions that Austen’s engine actually performing as the engineers claimed.

austensengine2016os

Austen’s Engine site 2017 Copyright OS Click here for map>

The mechanics of the trial required all the factors that made up the measurement of duty to be recorded. That is the amount of water lifted, by what distance with how much coal.

And so the coal was measured, the length of pump stroke measured and number of strokes taken by the large beam engine recorded. The resulting figure was a measurement of how much coal was needed to raise water from the depths of a Cornish mine. A figure of great importance to Cornwall, where its mine’s where deep, water was in abundance and coal expensive.

On the 23rd of October 1835 the trial finished. Measurements were taken and calculations complete; the resulting figure was spectacular. Austen’s engine had achieved 125 million duty, a performance that broke the existing records, and a performance that would never be overtaken by any other engine.

austensgoogle2017

Austen’s Engine on Google Maps 2017 Click here for map>

That day on Fowey Consols Cornish Steam engine technology appears to have reached its zenith. I say appears, because history is never as simple as that, disputes, accusations and controversy followed in the wake of the trial, and the duty recording system collapsed soon afterwards.

125 million did have its impact on history, despite of
the controversy. William West became very rich on its reputation, Harvey’s of Hayle would gain large amounts of extra work, and its influence would eventually result in improvements in clean water supply in the rapidly expanding British cities.

For another post about duty from this blog, ‘ Lean’s reporter, John Taylor and some layers of historyClick here>


51tRtgzctrL__SL160_PIsitb-sticker-arrow-dp,TopRight,12,-18_SH30_OU02_AA160_ If you enjoy reading on Kindle you can read more about William West of Tredenham>

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William West- Some key dates

wpid-screenshot_2015-08-21-17-43-45.pngDates in the life of William West of Tredenham

The Last Great Cornish Engineer

As a foundation to build my next talk around I have thrown together a few dates in William West’s life. Yes there are many gaps, and yes it is all a bit random in topics, but it does create a quick orientation time.  As this series of posts progress, so will this post be updated.  For a very quick biography of  William West Click here

1801

William West is born at Dolcoath

1808image003

West held a candle for Trevithick has he designed his ‘Catch-Me-Who-Can’ locomotive

1817 to 1819

West works at Dolcoath fitting shop

1822

West is chief working engineer at South Roskear and other mines

1828

Grose’s engine at Great Towan achieves an impressive 87 million duty with Wilson’s engine, a result TowanHeatherpartially the result of West’s improvement in insulation

1831

  •  Engaged by  J. T. Austin at Fowey Consols
  • Austins Engine was first proposed

1833

Contract for Austen’s engine signed51tRtgzctrL__SL160_PIsitb-sticker-arrow-dp,TopRight,12,-18_SH30_OU02_AA160_

1834

Austen’s Engine is started


1835


1837

  • West became the Fowey Consols sole engineer
  • The East Cornwall The engine was put up for sale by Harvey’s

The Victorian period starts

1838

The East London Engine was startedw13

1839

W4

1840

West started working for South Caradon mine

1843

  • West installed the first horizontal whim at Par Consols
  • West obtained a licence to build Sims compound engines

1845

  • West installed his first large Sims engine at Great Wheal Martha
  • Was contractor  on  Brunel’s atmospheric railway

1847-1858

Brownes engine reporter is printed

1848Map1881Tredenham

St. Blazey foundry is established by West

1850

William West commenced wpid-th-5.jpeghis association with Phoenix United Mine

1852

Tredhenam  house is built

1852

1856

St. Austell Lower foundry purchased by Westwpid-41f3tbq-cnl._sl500_1-2.jpg.jpeg

1863

Brenton Symons publishes his map of the Caradon mining District and Webb and Geach produce their book.

1864

1867

  • Fowey Consols failed
  • South Fowey Consols founded

1869

Newquay and Junction Railway completed to Drinnick Mill

1868

  • Penquite house purchaced
  • West obtains majority shares in Phoenix United

1870

Presentation to West of a time piece by the Phoenix United minersPhoenixCounthouse

1872

The South Caradon man engine is installed

1873

Cornwall Minerals Railway’s Act of Parliament was laid

1874

Cornwall Minerals Railway opened

1879

wpid-w2.jpg

1891

St. Blazey Foundry closed

1897

Phoenix United closed


wpid-westcover.jpgThe Last Great Cornish Engineer

William West of Tredenham

A paperback from the Trevitihick Society

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What Steam Engines were at Phoenix United Mine?

image

Here is a list of steam engines installed at Phoenix United Mine, Compiled from Kenneth Brown/Bob Acton’s Exploring Cornish Mine’s book, and The CAU study on the Minions area. Many of these engines were made at William West’s St. Blazey foundry.

Hamiltons Pumping Engine
A 36″ engine erected 1869-1870.
Some overgrown remains exist.

West’s Whim
A horizontal engine used in the last part of the mine’s life. A good set of remains exist.

West Phoenix Stamps
A 24″ engine driving  64 head of stamps.
A poor set of remains.

Crushing Engine
A 15″ or 20″, the use and size of this engine is not well known.
A poor set of remains.

Wheal Phoenix Stamps
Originally a pair of William West 26″ engines that was replaced with a 32″. It Drove a 96 head of stamps.
A poor set of remains.

Seccombe’s Whim
A 28″ engine
Only the bedstone remains.

Seccombes Pumping Engine
This 60″ engine was main pumping engine on the mine.
Very poor set of remains.

Water Wheel
A 60 ft wheel in the valley bottom.
A splendid set of remains!
Reference: Minions, An archaeological survey of the Caradon Mining Dsitrict, By Adam Sharp, Published by the Cornwall Archaeological Unit, 1993.

Click here to visit my Amazon author’s page
For those passing through Cornwall then pop into the Liskeard Bookshop, to buy books about the Caradon Mining area. To buy the books on line, or download the kindle publications then visit my Amazon store.

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South Caradon Mine picture notes

The ‘Last Great Cornish Engineer’ book launch is to start off (after tea and cake) with an exploration of two amazing photos of mines closely associated with William West. Both photos are well known, but I find them fascinating to explore, detail packed in to every part of the black and white images.

The first of the two photographs is from page 76 and 77 of the ”Last Great Cornish Engineer’, and shows South Caradon Mine in the 1880s. Here is an extract from the OS map of the same period and a few notes about the engines shown in the photograph.
 

image

Sump shaft Pumping Engine
This building housed the first engine to be installed at the mine, probably by William West. It was built in 1837 and different sources place its size at 30″, 35″ or 45″. Prior to its construction the pump was powered by flat-rods driven by a water wheel down in the valley. As the workings expanded underground a larger 50″ engine was installed (possibly in the late 1840’s) and this was still in place when the mine was finally closed

image

Sump Shaft Whim
The winding engine lies upslope of the shaft and in addition to winding at Sumps this engine provided power by flat rods to Pearce’s shaft higher up the hill. A 22 inch horizontal engine was housed in this building (some sources state a 16/30″). The was engine designed by William West. and was probably installed in 1844 (ref CAU) .
Horizontal engines did not require a substantial bob wall and the structure was therefore lighter than a traditional Cornish Engine house.

image

Stamp and Crusher Engine

The engine was of 28 inch diameter and powered a 24 head of stamps.  No  boiler house can be seen in this photograph immediately behind the Engine house where the CAU study suggests it should be.It was common for stamp engines to have its boiler houses in this position in order to release the room in front and to the sides for heads of stamps.

image

Pearce’s Shaft

The Pumping from this shaft was originally powered by flat-rods running uphill from the winding engine at Sump Shaft.
The 50″ engine was installed at Pearce’s in 1870, relatively late in the mines life.

Reasons suggested for the buttressed including unstable ground and the angle of the shaft. Brown & Acton supports the angle of shaft theory.

image

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