I could do nothing with the engine in England unless it was put on
the market as a condensing engine. This fact was finally revealed to
me, and I applied myself to meet the requirement. The question as it
addressed itself to me was, not “How do you work your air-pump?” but
“How _are you going_ to work your air-pump?” My friends Easton, Amos
& Sons told me frankly that in their judgment I could not do it at
all. Their opinion was expressed very decidedly, that as a condensing
engine the high-speed engine was not to be thought of. This was not
surprising, seeing that the beam Wolff engines made by them ran at
only 25 revolutions per minute, which was the speed of beam-engines
generally, and all stationary engines were beam-engines; but it was
discouraging. I made up my mind that they did not know everything, and
I would show them a thing or two as soon as I got a chance. This I
found easier to get than I expected, when I had matured a satisfactory
system of condensation. My first plan was to use an independent
air-pump running at the usual slow speed and driven by a belt, the
speed being reduced by intermediate gearing.
I was able very readily to make an agreement on this basis with the
firm of Ormerod, Grierson & Co., of Manchester, for the manufacture of
the engines and governors, and we started on our first order on the
first day of January, 1864.
The ground occupied by these works bordered on the Duke of
Bridgewater’s canal from Liverpool to Manchester, where I one day saw a
cow and a woman towing a boat, a man steering.
A railway ran through these works, parallel with the canal, at about
300 feet distance, but it was not at all in the way. It was built
on brick arches, and the construction was such that the passing of
trains was scarcely heard. The arches were utilized for the millwright
shop, pattern shop, gear-cutting shop, and the storage of lumber and
gear-wheel patterns, the number and size of which latter astonished me.
On a previous visit Mr. Grierson had shown me several things of much
interest. The one most worthy of being related was a multiple drill,
capable of drilling ninety holes, ³⁄₄ inch diameter, simultaneously.
This had been designed and made by themselves for use in building a
lattice-girder bridge, for erection over the river Jumna, near Delhi,
to carry a roadway below and a railway above. The English engineers
then made all bridge constructions on this system, having no faith in
the American truss. One length of this bridge still stood in their
yard, where it had been completely riveted up for testing, after
which all the rivets would have to be cut out. The other lengths
had been shipped in pieces. The advantage of this multiple drill
was twofold--the ability to drill many holes simultaneously and the
necessary accuracy of their pitch.
Public-domain text, read in full here on John Shaqi.
Reviews
Reviews
No reviews yet
Be the first to share your thoughts on this work.
Elsewhere in the archive
Join the Discussion
Join the discussion
Sign in to leave a comment or review.
Sign InorCreate an account