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Contents
Preparations for
a home , Influence of chance
occurances , Visit to Mr.
Hartop's near Barnsley , Important interview , Eventual marriage , Great Western
Railway locomotives , Mr. Humphries and
'Great Western' steamship , Forging of
paddle-shaft , Want of range of
existing hammers , The first steam
hammer sketched , Its arrangement , The paddle shaft abandoned , My sketch copied and adopted , My visit to Creuzot , Find steam hammer in
operation , A patent taken out , First steam hammer made in England , Its general adoption ,
Patent
secured for United States ,
BEFORE I proceed to
narrate the later events of my industrial life, it is necessary
to mention, incidentally, an important subject. As it has been
the source of my greatest happiness in life, I cannot avoid
referring to it.
I may first mention
that my earnest and unremitting pursuit of all subjects and
occupations, such as I conceived were essential to the
acquirement of a sound practical knowledge of my profession,
rendered me averse to mixing much in general society. I had
accordingly few opportunities of enjoying the society of young
ladies. Nevertheless, occasions now and then occurred when bright
beings passed before me like meteors. They left impressions on my
memory, which in no small degree increased the earnestness of my
exertions to press forward in my endeavours to establish myself
in business, and thereby acquire the means of forming a Home of
my own.
Many circumstances,
however, conspired to delay the ardently longed for condition of
my means, such as should induce me to solicit some dear one to
complete my existence by her sweet companionship, and enter with
me into the most sacred of all the partnerships of life. In
course of time I was rewarded with that success which, for the
most part, ensues upon all honourable and unremitting business
efforts. This cheered me on; although there were still many
causes for anxiety, which made me feel that I must not yet
solicit some dear heart to forsake the comforts of an affluent
home to share with me what I knew must for some years to come be
an anxious and trying struggle for comfort and comparative
independence. I had reached my thirtieth year before I could
venture to think that I had securely entered upon such a course
of prosperity as would justify me in taking this the most
important step in life.
It may be a trite but
not the less true remark that some of the most important events
originate in apparently chance occurrences and circumstances,
which lead up to results that materially influence and even
determine the subsequent course of our lives. I had occasion to
make a business journey to Sheffield on the 2d of March 1838, and
also to attend to some affairs of a similar character at York. As
soon as I had completed my engagement at Sheffield, I had to wait
for more than two dreary hours in momentary expectation of the
arrival of the coach that was to take me on to York. The coach
had been delayed by a deep fall of snow, and was consequently
late. When it arrived, I found that there was only one outside
place vacant; so I mounted to my seat. It was a very dreary
afternoon, and the snow was constantly falling.
As we approached
Barnsley I observed, in the remaining murky light of the evening,
the blaze of some ironwork furnaces near at hand. On inquiring
whose works they were, I was informed that they belonged to Earl
Fitzwilliam, and that they were under the management of a Mr.
Hartop. The mention of this name, coupled with the sight of the
ironworks, brought to my recollection a kind invitation which Mr.
Hartop had given me while visiting my workshop in Manchester to
order some machine tools, that it I ever happened to be in his
neighbourhood, he would be most happy to show me anything that
was interesting about the ironworks and colliery machinery under
his management.
I at once decided to
terminate my dreary ride on the top of the coach. I descended,
and with my small valise in hand I trudged over some trackless
snow-covered fields, and made my way by the shortest cut towards
the blazing iron furnaces. On reaching them I was informed that
Mr. Hartop had just gone to his house, which was about a mile
distant. I accordingly made my way thither the best that I could
through the deep snow. I met with a cordial welcome, and with the
hospitable request that I should take up my quarters there for
the night, and have a round of the ironworks and the machinery on
the following day. I cheerfully acceded to the kind invitation. I
was then introduced to his wife and daughter in a cosy room,
where I spent a most pleasant evening . As Mr. Hartop was an
enthusiast in all matters relating to mechanism and mechanical
engineering subjects generally, we found plenty to converse
about; while his wife and daughter, at their needlework, listened
to our discussions with earnest and intelligent attention.
On the following day
I was taken a round of the ironworks, and inspected their
machinery, as well as that of the collieries, in the details of
which Mr. Hartop had introduced many common-sense and most
effective improvements. All of these interested me, and gave me
much pleasure. In the evening we resumed our "cracks"
on many subjects of mutual interest. The daughter joined in our
conversation with the most intelligent remarks; for, although
only in her twenty-first year, she had evidently made good use of
her time, aided by her clear natural faculties of shrewd
observation. Mr. Hartop having met with some serious reverse of
fortune, owing to the very unsatisfactory conduct of a partner,
had in a manner to begin business life again on his own account;
and although he had to reduce his domestic establishment
considerably in consequence, there was in all its arrangements a
degree of neatness and perfect systematic order, combined with
many evidences of elegant taste and good sense which pervaded the
whole, that enhanced in no small degree the attractiveness of the
household. The chief of these, however, was to me their daughter
Anne! I soon perceived in her, most happily and attractively
combined, all the conditions that I could hope for and desire to
meet with in the dear partner of my existence.
As I had soon to
proceed on my journey, I took the opportunity of telling her what
I felt and thought, and so ardently desired in regard to our
future intercourse. What little I did say was to this great
purpose; and, so far as I could judge, all that I said was
received in the best spirit that I could desire. I then
communicated my hopes and wishes to the parents. I explained to
them my circumstances, which happily were then beginning to
assume an encouraging prospect, and realising, in a substantial
form, a return for the earnest exertions that I had made towards
establishing a home of my own. They expressed their concurrence
in the kindest manner; and it was arranged that if business
continued to progress as favourably as I hoped, our union should
take place in about two years from that time.
Everything went on
hopefully and prosperously. The two years that intervened looked
very long in some respects, and very short in others; for I was
always fully occupied, and labour shortens time. At length the
two years came to an end. My betrothed and myself continued of
the same mind. The happy "chance" event of our meeting
on the evening of the 2d of March 1838 culminated in our marriage
at the village church of Wentworth on the 16th of June 1840 -- a
day of happy memory! From that day to this the course of our
united hearts and lives has continued to run on with steady
uninterrupted harmony and mutual happiness. Forty-two years of
our married life finds us the same affectionate and devoted
"cronies" that we were at the beginning; and there is
every prospect that, under God's blessing, we shall continue to
be so to the end.
I was present at the
opening of the Liverpool and Manchester Railway, on the 15th of
September 1830. Every one knows the success of the undertaking.
Railways became the rage. They were projected in every possible
direction. They were first made between all the large towns,
after which branches were constructed to place the whole country
in connection with the main lines. Coaches were driven off the
road, and everything appeared to be thrown into a state of
confusion. People wondered greatly at the new conditions of
travelling; and they flocked from all quarters to see the railway
at work.
When the line was
opened from Edinburgh to Glasgow, a shepherd and his wife came
from beyond the Pentlands to see the train pass. On it came, and
flashed out of sight in a minute. "How wonderful are the
works o' man!" exclaimed the shepherd. "But what's
a' the hurry for?", rejoined his wife. Still more
marvellous, however, was the first adventure by train of an old
woman from Newtyle to Dundee. In those days the train was let
down part of the railway by a rope. The woman was on her way down
hill, with a basket of eggs by her side. Suddenly the rope broke,
and the train dashed into the Dundee Station, scattering the
carriages, and throwing out the old woman and her basket of
broken eggs. A porter ran to her help, when, gathering herself
together, she exclaimed, "Odd sake, sirs, d'ye aye
whummil# us oot
this way?" She thought it was only the ordinary way of
delivering railway passengers.
Ropes, however, were merely exceptional
methods of working railway trains. Eventually locomotives were
invariably adopted. When railways were extended in so many
directions, more and more locomotives were required to work them.
When George Stephenson
was engaged in building his first locomotive at Killingworth, he
was greatly hampered, not only by the want of handy mechanics,
but by the want of efficient tools. But he did the best that he
could. His genius overcame difficulties . It was immensely to his
credit that he should have so successfully completed his engines
for the Stockton and Darlington, and afterwards for the Liverpool
and Manchester Railway.
Only a few years had
passed, and self-acting tools were now enabled to complete, with
precision and uniformity, machines that before had been deemed
almost impracticable.
In proportion to the
rapid extension of railways the demand for locomotives became
very great. As our machine tools were peculiarly adapted for
turning out a large amount of first-class work, we directed our
attention to this class of business. In the course of about ten
years after the opening of the Liverpool and Manchester Railway,
we executed considerable orders for locomotives for the London
and Southampton, the Manchester and Leeds, and the Gloucester
railway companies.
The Great Western
Railway Company invited us to tender for twenty of their very
ponderous engines. They proposed a very tempting condition of the
contract. It was, that if, after a month's trial of the
locomotives, their working proved satisfactory, a premium of
£100 was to be added to the price of each engine and tender. The
locomotives were made and delivered; they ran the stipulated
number of test miles between London and Bristol in a perfectly
satisfactory manner; and we not only received the premium, but,
what was much more encouraging, we received a special letter from
the Board of Directors, stating their entire satisfaction with
the performance of our engines, and desiring us to refer other
contractors to them with respect to the excellence of our
workmanship. This testimonial was altogether spontaneous, and
proved extremely valuable in other quarters.
I may mention that,
in order to effect the prompt and perfect execution of this
order, I contrived several special machine tools, which assisted
us most materially. These tools for the most part rendered us
more independent of mere manual strength and dexterity, while at
the same time they increased the accuracy and perfection of the
work. They afterwards assisted us in the means of perfecting the
production of other classes of work. At the same time they had
the important effect of diminishing the cost of production, as
was made sufficiently apparent by the balance-sheet prepared at
the end of each year. My connection with the Great Western Company shortly
led to a most important event in connection with my own personal
history. It appears that their famous steam-ship the Great
Western had been very successful in her voyages between
Bristol and New York; so much so, indeed, that the directors of
the Company ordered the construction of another vessel of much
greater magnitude -- the Great Britain. Mr. Francis
Humphries, their engineer, came to Patricroft to consult with me
as to the machine tools, of unusual size and power, which were
required for the construction of the immense engines of the
proposed ship, which were to be made on the vertical trunk
principle. Very complete works were erected at Bristol for the
accommodation of the requisite machinery. The tools were made
according to Mr. Humphries' order; they were delivered and fitted
to his entire approval, and the construction of the gigantic
engines was soon in full progress.
An unexpected
difficulty, however, was encountered with respect to the enormous
wrought-iron intermediate paddleshaft. It was required to be of a
size and diameter the like of which had never been forged. Mr. Humphries applied to
the largest forges throughout the country for tenders of the
price at which they would execute this important part of the
work, but to his surprise and dismay he found that not one of
them could undertake so large a forging. In this dilemma he wrote
a letter to me, which I received on the 24th of November 1839,
informing me of the unlooked-for difficulty. "I find,"
he said, "that there is not a forge hammer in England or
Scotland powerful enough to forge the intermediate paddle-shaft
of the engines for the Great Britain! What am I to do? Do
you think I might dare to use cast-iron?
This letter
immediately set me a-thinking. How was it that the existing
hammers were incapable of forging a wrought-iron shaft of thirty
inches diameter? Simply because of their want of compass, of
range and fall, as well as of their want of power of blow. A few
moment's rapid thought satisfied me that it was by our rigidly
adhering to the old traditional form of a smith's hand hammer --
of which the forge and tilt hammer, although driven by water or
steam power, were merely enlarged modifications -- that the
difficulty had arisen; as, whenever the largest forge hammer was
tilted up to its full height, its range was so small that when a
piece of work of considerable size was placed on the anvil, the
hammer became "gagged;" so that, when the forging
required the most powerful blow, it received next to no blow at
all, as the clear space for the fall of the hammer was almost
entirely occupied by the work on the anvil.
The obvious remedy
was to contrive some method by which a ponderous block of iron
should be lifted to a sufficient height above the object on which
it was desired to strike a blow, and then to let the block full
down upon the forging, guiding it in its descent by such simple
means as should give the required precision in the percussive
action of the falling mass following up this idea, I got out my
"Scheme Book," on the pages of which I generally thought
out, with the aid of pen and pencil, such mechanical
adaptations as I had conceived in my mind, and was thereby
enabled to render them visible. I then rapidly sketched out my
Steam Hammer, having it all clearly before me in my mind's eye.
In little more than half an hour after receiving Mr. Humphries'
letter narrating his unlooked-for difficulty, I had the whole
contrivance in all its executant details, before me in a page of
my Scheme Book, a reduced photographed copy of which I append to
this description. The date of this first drawing was the 24th
November, 1839.
First
drawing of steam hammer, 24th Nov. 1839
My Steam Hammer as
thus first sketched, consisted of, first, a massive anvil on
which to rest the work; second, a block of iron constituting the
hammer or blow-giving portion; and, third, an inverted steam
cylinder to whose piston-rod the hammer-block was attached. All
that was then required to produce a most effective hammer was
simply to admit steam of sufficient pressure into the cylinder,
so as to act on the under-side of the piston, and thus to raise
the hammer-block attached to the end of the piston rod. By a very
simple arrangement of a slide valve, under the control of all
attendant, the steam was allowed to escape and thus permit the
massive block of iron rapidly to descend by its own gravity upon
the work then upon the anvil.
Thus, by the more or
less rapid manner in which the attendant allowed the steam to
enter or escape from the cylinder, any required number or any
intensity of blows could be delivered. Their succession might be
modified in an instant. The hammer might be arrested and
suspended according to the requirements of the work. The workman
might thus, as it were, think in blows. He might deal them
out on to the ponderous glowing mass, and mould or knead it into
the desired form as if it were a lump of clay; or pat it with
gentle taps according to his will, or at the desire of the
forgeman.
Rude and rapidly
sketched out as it was, this, my first delineation of the steam
hammer, will be found to comprise all the essential elements of
the invention. Every detail of the drawing retains to this day
the form and arrangement which I gave to it forty-three years
ago. I believed that the steam hammer would prove practically
successful; and I looked forward to its general employment in the
forging of heavy masses of iron. It is no small gratification to
me now, when I look over my rude and hasty first sketch, to find
that I hit the mark so exactly, not only in the general structure
but in the details; and that the invention as I then conceived it
and put it into shape, still retains its form and arrangements
intact in the thousands of steam hammers that are now doing good
service in the mechanical arts throughout the civilised world.
But to return to my
correspondence with the Great Western Steamship Company. I wrote
at once to Mr. Humphries, and sent him a sketch of my proposed
steam hammer. I told him that I felt assured he would now be able
to overcome his difficulty, and that the paddle-shaft of the Great
Britain might now be forged. Mr. Humphries was delighted with
my design. He submitted it to Mr. Brunel, engineer-in-chief of
the steamship: to Mr. Guppy, the managing director; and to other
persons interested in the undertaking, -- by all of whom it was
heartily approved. I accordingly gave the Company permission to
communicate my design to such forge proprietors as might feel
disposed to erect the steam hammer, the only condition that I
made being, that in the event of its being adopted I was to be
allowed to supply it in accordance with my design.
But the paddle-shaft
of the Great Britain was never forged. About that time the
substitution of the Screw for the paddle-wheel as a means of
propulsion was attracting much attention. The performances of the
Archimedes, as arranged by Mr. Francis P. Smith , were so
satisfactory that Mr. Brunel, after he had made an excursion in
that vessel, recommended the directors to adopt the new
propelling power. After much discussion, they yielded to his
strongly-urged advice. The consequence was, that the great
engines which Mr. Humphries had so elaborately designed, and
which were far advanced in construction, were given up, to his
inexpressible regret and mortification, as he had pinned his
highest hopes as a practical engineer on the results of their
performance. And, to crown his distress, he was ordered to
produce fresh designs of engines specially suited for screw
propulsion. Mr. Humphries was a man of the most sensitive and
sanguine constitution of mind. The labour and the anxiety which
he had already undergone, and perhaps the disappointment of his
hopes, proved too much for him; and a brain fever carried him off
after a few days' illness. There was thus, for a time, an end of
the steam hammer required for forging the paddle-shaft of the Great
Britain.
Very bad times for
the iron-trade, and for all mechanical undertakings, set in about
this time. A wide-spread depression affected all conditions of
industry Although I wrote to the heads of all the great firms,
urging the importance of my invention, and forwarding designs of
my steam hammer, I was unable to obtain a single order. It is
true, they cordially approved of my plan, and were greatly struck
by its simplicity, unity, and apparent power.[note: Among
the heads of firms who sent me cordial congratulations on my
design, were Benjamin Hick, of the Soho Ironworks, Bolton, a man,
whose judgment in all matters connected with engineering and
mechanical construction was held in the very highest regard;
Messrs. Rushton and Eckersley, Bolton Ironworks; Messrs. Howard
and Ravenhill, Rotherhithe Ironworks, London; Messrs. Hawkes,
Crashaw, and Company, Newcastle-upon-Tyne; George Thorneycroft,
Wolverhampton; and others.]
But the substance of
their replies was, that they had not sufficient orders to keep
the forge hammers they already possessed in work. They promised,
however, that in the event of trade recovering from its
depression, they would probably adopt the new power.
In the meantime my
invention was taken up in an entirely new and unexpected quarter.
I had for some years been supplying foreign customers with
self-acting machine tools. The principals of continental
manufacturing establishments were accustomed to make frequent
visits to England for the purpose of purchasing various machine
tools required for the production of the ponderous as well as the
lighter parts of their machinery. We gave our foreign visitors
every facility and opportunity for seeing our own tools at work,
and they were often so much pleased that, when they came to order
one special tool, they ended by ordering many, -- the machine
tools in full activity thus acting as their most effective
advertisements. In like manner I freely opened my Scheme Book to
any foreign visitors. [note: Some establishments in the
same line of business were jealous of the visit of foreigners;
but to our views, restriction in the communication of new ideas
on mechanical subjects to foreigners of intelligence and
enterprising spirit served no good purpose, as the foreign
engineer was certain to obtain all the information he was in
quest of from the drawings in the Patent Office, or from the
admirable engravings contained in the engineering publications of
the day. It was better to derive the advantage of supplying them
with the machines they were in quest of, than to wait until the
demand was supplied by foreigners themselves.]
There I let them see
the mechanical thoughts that were passing through my mind,
reduced to pen and ink drawings. I did not hesitate to advocate
the advantage of my steam hammer over every other method of
forging heavy masses of iron; and I pointed out the drawing in my
Scheme Book in confirmation of my views. The book was kept in the
office to be handy for such occasions; and in many cases it was
the means of suggesting ideas of machine tools to our customers,
and thus led to orders which might not have been obtained without
this effective method of prompting them. Amongst our foreign
visitors was M. Schneider , proprietor of the great ironworks at
Creuzot, in France. We had supplied him with various machine
tools, and he was so pleased with their action that the next time
he came to England he called at our office at Patricroft. M.
Bourdon, his mechanical manager, accompanied him.
I happened to be
absent on a journey at the time; but my partner, Mr. Gaskell, was
present. After showing them over the works, as an act of courtesy
he brought them my Scheme Book and allowed them to examine it. He
pointed out the drawing of my steam hammer, and told them the
purpose for which it was intended. They were impressed with its
simplicity and apparent practical utility, -- so much so, that M.
Bourdon took careful notes and sketches of the constructive
details of the hammer.
I was informed on my
return of the visit of MM. Schneider and Bourdon, but the
circumstance of their having inspected the designs in my Scheme
Book, and especially my original design of the steam hammer, was
regarded by my partner as too ordinary and trivial an incident of
their visit to be mentioned to me. The exhibition of my
mechanical designs to visitors at the Foundry was a matter of
almost daily occurrence. I was, therefore, in entire ignorance of
the fact that these foreign visitors had taken with them to
France a copy of the plan and details of my steam hammer.
It was not until my
visit to France in April 1842 that the upshot of their visit was
brought under my notice in an extraordinary manner. I was
requested by M. Bouchier, Minister of Marine, to visit the French
dockyards and arsenals for the purpose of conferring with the
director of each with reference to the supply of various machine
tools for the proper equipment of the marine engine factories in
connection with the Royal Dockyards. In order to render this
journey more effective and instructive, I visited most of the
French engineering establishments which had been supplied with
machine tools by our firm. Amongst these was of course the famous
firm of Schneider, whose works at Creuzot lay not far out of the
way of my
return journey accordingly made my
way thither, and found M. Bourdon at his post, though M.
Schneider was absent.
M. Bourdon received
me with much cordiality. As he spoke English with fluency I was
fortunate in finding him present, in order to show me over the
works; on entering which, one of the things that particularly
struck me was the excellence of a large wrought-iron marine
engine single crank, forged with a remarkable degree of exactness
in its general form. I observed also that the large eye of the
crank had been punched and drifted with extraordinary smoothness
and truth. I inquired of M. Bourdon "how that crank had been
forged?" His immediate reply was, "It was forged by
your steam hammer!"
Great was my surprise
and pleasure at hearing this statement. I asked him how he had
come to be acquainted with my steam hammer? He then narrated the
circumstance of his visit to the Bridgewater Foundry during my
absence. He told me of my partner having exhibited to him the
original design, and how much he was struck by its simplicity and
probable efficiency; that he had taken careful note and sketches
on the spot; that among the first things he did after his return
to Creuzot was to put in hand the necessary work for the erection
of a steam hammer; and that the results had in all respects
realised the high expectations he had formed of it.
M. Bourdon conducted
me to the forge department of the works, that I might, as he
said, "see my own child;" and there it was, in truth --
a thumping child of my brain. Until then it had only existed in
my scheme book; and yet it had often and often been before my
mind's eye in full action. On inspecting the steam hammer I found
that Bourdon had omitted some important details, which had led to
a few mishaps, especially with respect to the frequent breaking
of the piston-rod at its junction with the hammer block. He had
effected this, in the usual way, by means of a cutter wedge
through the rod; but he told me that it often broke through the
severe jar during the action of the hammer. I sketched for him,
then and there, in full size on a board, the elastic packing
under the end of the piston-rod, which acted, as I told him, like
the cartilage between the bones of the vertebrae, preventing the
destructive effects of violent jars. I also communicated to him a
few other important details, which he had missed in his hasty
inspection of my design. Indeed, I felt great pleasure in doing
so, as I found Bourdon to be a most intelligent mechanic, and
thoroughly able to appreciate the practical value of the
information I communicated to him. He expressed his obligation to
me in the warmest terms, and the alterations which he shortly
afterwards effected in the steam hammer, in accordance with my
plans, enabled it to accomplish everything that he could desire.
I had not yet taken out
a patent for the steam hammer. The reason was this. The cost of a
patent at the time I invented it was little short of £500, all
expenses included. My partner was unwilling to lay out so large a
sum upon an invention for which there seemed to be so little
demand at that time; and I myself had the whole of my capital
embarked in the concern. Besides, the general depression still
continued in the iron trade; and we had use for every farthing of
money we possessed. I had been warned of the risk I ran by freely
exhibiting my original design, as well as by sending drawings of
it to those who I thought were most likely to bring the invention
into use. But nothing had as yet been done in England. It was
left for France, as I have described, to embody my invention in
an actual steam hammer. I now became alarmed, and feared lest I
should lose the benefits of my invention. As my partner declined to help me, I
applied to my brother-in-law, William Bennett. He was a practical
engineer, and had expressed himself as highly satisfied with its
value. He had also many times cautioned me against
"publishing" its advantages so widely, without having
first protected it by a patent. He was therefore quite ready to
come to my assistance. He helped me with the necessary money, and
the invention was placed in a position of safety so far as my
interests were concerned. In return for his kindness I stipulated
that the reimbursement of his loan should be a first charge upon
any profits arising from the manufacture of the steam hammer; and
also that he should have a share in the profits during the period
of the patent rights. Mr. Bennett lived for many years, rejoicing
in the results of his kindness to me in the time of my
difficulty. I may add that the patent was secured in June 1842,
or less than two months after my return from France.
Soon after this, the
iron trade recovered from its depression. The tide of financial
prosperity of the Bridgewater Foundry soon set in, and my
partner's sanguine confidence in my ability to raise it to the
condition of a thriving and prosperous concern was justified in a
most substantial manner. In order to make the most effective
demonstration of the powers and capabilities of my steam hammer,
I constructed one of 30cwt. of hammer block, with a clear four
feet range of fall. I soon had it set to work; and its energetic
services helped us greatly in our smith and forge work. It was
admired by all observers. People came from a distance to see it.
Mechanics and ironfounders wondered at the new power which had
been born. The precision and beauty of its action seemed
marvellous. The attendant could, by means of the steam
slide-valve lever in his hand, transmit his will to the action of
the hammer, and thus think in blows. The machine combined great
power with gentleness. The hammer could be made to give so gentle
a blow as to crack the end of an egg placed in a wine glass on
the anvil; whilst the next blow would shake the parish or be
instantly arrested in its descent midway.[note: This is no
mere figure of speech. I have heard the tea-cups rattle in the
cupboard in my house a quarter of a mile from the place where the
hammer was at work. I was afterwards informed that the blows of
my great steam hammer at Woolwich Arsenal were sensibly felt at
Greenwich Observatory, about two miles distant.]
Hand-gear was the
original system introduced in working the hammer. A method of
self-acting was afterwards added. In 1843, I admitted steam above
the piston, to aid gravitation. This was an important
improvement. The self-acting arrangement was eventually done away
with, and hand-gear again became all but universal. Sir John
Anderson, in his admirable Report on the Vienna Exhibition of
1873, says: The most remarkable features of the Nasmyth hammers
were the almost entire abandonment of the old self-acting motion
of the early hammers and the substitution of new devices, and in
the use of hand-gear only in all attempts to show off the
working. There is no real saving, as a general rule, by the
self-acting arrangement, because one attendant is required in
either case, and on the other hand there is frequently a positive
loss in the effect of the blow. By hand-working, with steam on
top of piston, the full force can be more readily maintained
until the blow is fully delivered; it is thus more of a dead blow
than was formerly the case with the other system."
There was no want of
orders when the valuable qualities of the steam hammer came to be
seen and experienced. The first Order came from Rushton and
Eckersley of Bolton, who, by the way, had seen the first copy of
my original design a few years before. The steam hammer I made
for them was more powerful than my own. The hammer block was of
five tons weight, and had a clear fall of five feet. It gave
every satisfaction, and the fame of its performances went abroad
amongst the ironworkers. The Lowmoor Ironworks Company followed
suit with an order for one of the same size and power; and
another came from Hawkes and Co., of Newcastle-upon-Tyne.
One of the most
important uses of the steam hammer was in forging anchors. Under
the old system, anchors upon the soundness of which the safety of
ships so often depends -- were forged upon the "bit by
bit" system. The various pieces of an anchor were welded
together, but at the parts where the different pieces of iron
were welded together, flaws often occurred; the parts would break
off -- blades from the stock, or flukes from the blades -- and
leave the vessel, which relied upon the security of its anchor,
at the risk of the winds and the waves. By means of the steam
hammer these risks were averted. The slag was driven out during
the hammering process. The anchor was sound throughout because it
was welded as a whole.
Those who are
technically acquainted with smith work as it used to be
practised, by what I term the "bit by bit" system --
that is, of building up from many separate parts of iron,
afterwards welded together into the required form -- can
appreciate the vast practical value of the Die method brought
into general use by the controllable but immense power of the
steam hammer. At a very early period of my employment of the
steam hammer, I introduced the system of stamping masses of
welding hot iron as if it had been clay, and forcing it into
suitable moulds or dies placed upon the anvil. This practice had
been in use on a small scale in the Birmingham gun trade, The
ironwork of firearms was thus stamped into exact form. But, until
we possessed the wide range and perfectly controllable powers of
the steam hammer, the stamping system was confined to
comparatively small portions of forge work. The new power enabled
the die and stamp system to be applied to the largest class of
forge work; and another era in the working of ponderous masses of
smith and forge work commenced, and has rapidly extended until
the present time. Without entering into further details, the
steam hammer has advanced the mechanical arts, especially with
relation to machinery of the larger class, to an extent that is
of incalculable importance.
Soon after my steam
hammer had exhibited its merits as a powerful and docile agent in
percussive force, and shown its applicability to some of the most
important branches of iron manufacture, I had the opportunity of
securing a patent for it in the United States. This was through
the kind agency of my excellent friend and solicitor, the late
George Humphries of Manchester. Mr. Humphries was a native of
Philadelphia, and the intimate friend of Samuel Vaughan Merrick,
founder of the eminent engineering firm of that city. Through his
instrumentality I forwarded to Mr. Merrick all the requisite
documents to enable a patent to be secured at the United States
Patent Office at Washington. I transferred the patent to Mr.
Merrick in order that it might be worked to our mutual advantage.
My invention was thus introduced into America under the most
favourable auspices. The steam hammer soon found its way into the
principal ironworks of the country. The admirable straightforward
manner in which our American agent conducted the business from
first to last will ever command my grateful remembrance.
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