NEW MODE OF APPLYING MACHINERY IN MANUFACTURING COPPER AND TIN PLATE VESSELS OF EVERY DESCRIPTION
Year: 1798

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
GRENFELL, of Dulwich, in the County of Surrey, Merchant, do send greeting.
WHEREAS His most Excellent Majesty King George the Third, by His
Letters Patent under the Great Seal of Great Britain, bearing date at
Westminster, the Tenth day of October, in the thirty-eighth year of His
reign, did give and grant unto me, the said John Grenfell, my executors,
administrators, 'and assigns, His special licence that I, the said John Grenfell,
my executors, administrators, and assigns, during the term of years therein
expressed, should and lawfully might make, use, exercise, and vend, within
England, Wales, and the Town of Berwick-upon-Tweed, my "NEW MODE OF
APPLYING MACHINERY IN MANUFACTURING COPPER AND TIN PLATE VESSELS OF
EVERY DESCRIPTION;" in which said Letters Patent there is contained a proviso,
obliging me, the said John Grenfell, under my hand and seal, to cause a par-
ticular description of the nature of my said Invention, and in what manner the
same is to be performed, to be inrolled in His Majesty's High Court of
Chancery within one calendar month next and immediately after the date of
the said recited Letters Patent, as in and by the same (relation being thereunto
had) may more fully and at large appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said
John Grenfell, do hereby declare that my said Invention consists in applying,
First, hammers worked by tilt, or trip, or in any other manner by machinery
put in motion by steam, water, or any other power. The saving of labour,
which is the object of this Patent, is obtained by working one or more

page_text: hammers of different sizes and weights, by the same shaft, or by changing the
hammers according to the nature of the work to be performed, whether it be
riveting, joining the seams or any other; and further by providing sufficient
room for the largest, as well as the smaller. vessells, or any parts thereof, to be
placed under the proper hammers.
Secondly, a bar of metal or pole of wood suspended in equilibrium from a
plank laid across two upright posts, one end of which bar or pole is faced with
steel, and for the different operations in which a horizontal spoke is required,
I use bars or poles faced accordingly, as above mentioned; in the application of
vertical hammers. This machine acts on the same principle as the aries
suspensus of the ancients; the upright posts supporting it, being put on rollers,
it may be moved to any part of the shop, and will be very useful in making
such large vessels as cannot conveniently be brought to the machinery. The
suspending rope or chain is easily raised or lowered, to let the pole or bar act
on any part of the surface opposite to it.
In witness whereof, I, the said John Grenfell,- have hereunto, set my
hand and seal, this Eighth day of November, in the thirty-ninth year of
the reign of our Sovereign Lord. George the Third, by the grace of
God, of Great Britain, France, and Ireland King, Defender of the
Faith, &c., and in, the year of our Lord One. thousand seven hundred
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