INVENTION FOR BORING TIMBER FOR PUMPS, WATER-PIPES, AND OTHER PURPOSES
Year: 1801

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOSEPHI
CHIRM, of Birmingham, in the County of Warwick, Pump Maker, 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 West-
minster, the Twelfth day of May, in the forty-first year of His reign, did give
and grant unto me, the said Joseph' Chirm, my executors, administrators,
and assigns, His especial licence, full power, sole privilege and authority, that
he, the said Joseph Chirm, my executors, administrators, and assigns, during
the term of fourteen years therein expressed, should and lawfully might make,
use, exercise, and vend, within England, Wales, and the Town of Berwick-
upon-Tweed, my "INVENTION FOR BORING TIMBER FOR PUMPS, WATER-PIPES,
AND OTHER PURPOSES;" in which said Letters Patent there is contained a
proviso, obliging me, the said Joseph Chirm, under my hand and seal, to
cause a particular 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
Joseph Chirm, do hereby declare that my said Invention consists of a method
or methods of centering trees that are to be bored more expeditiously and
more true than any hitherto applied, and for preventing the waste and spoiling
of pump trees or wood pipes so much as heretoforé, and for the less

page_text: frequent breaking of the tools used, and also for regulating the descent of the
tree or timber to be bored upon the cutters. For obtaining these purposes I
have various methods, but those I most approve I describe as follows, that is
to say-
I draw lines across both ends of the trees to be bored, as is commonly done
for finding the center of the end of a piece of timber; I then take a round
block, as is shown in Drawing, Figure Fourteen, the thick end corresponding
with the cutter about to be used, and which block has an iron spindle, that
passes through it from end to end; one end of this iron spindle is a spike, two
inches and a half long or thereabouts (other lengths will do), and the other
end is a center turned, true or rounded, and about one inch and a half long; the
length of it is not confined, but I make it fit into a socket at the top of M. (see
Drawing), the centre of the iron spindle on which the horizontal wheel is fixed,
as I shew in the Drawing annexed at A, in Figure 1; I then drive the spike
of this block and spindle, Figure 14, into one end of the tree that is to be
bored at the point of intersection of the above described lines, and raising the
other end of the tree by a rope with a common wheel and pinion, as shewn
in a Drawing annexed, Figure 1, at B, till it bangs between the uprights or
standards a and b, Figure 1; the tree I then drop through two hoops of iron
with regulating screws in them, which is shewn in the drawing, Figure 1, at
c, c,.and d, d, and which hoops are incapable of moving any other way than
along the rods e, e, e, e, shewn by blue lines in Figure 1; I drop the bottom
or lower end of the tree into the center sockett of spindle of wheel A, and the
screw hoop of d, d, I fasten to the tree by the screws 1, 2, 3, .4, in Figure 2;
I then move the screw hoop c, c, to the height it is intended to be fixed, and a
guage of wood, iron, or other material, Figure 3, with a hole in its centre,
is brought the rods e, e, e, e, to adjust the top end of the tree, in which at the
point of intersection of the lines drawn upon it, a pin is previously fixed. This
pin been brought to the center hole of the guage No. 3 adjusts the tree, and
I then fasten it with the screws 1, 2, 3, 4 in the hoop c, c; I now draw the
tree with the block, Figure 14, fast by the spiko to the lower end of the tree
high enough by the rope, Figure 1, to put the cutters on cylindrical boring rod
into its place; the lower end of this rod fits into the center hole or socket
before-mentioned in the spindle A of the horizontal wheel of Figure 1, and
the upper end of this hollow boring is adjusted and brought into its true place
by the block before mentioned. The machine is then put in motion, and
worked by the power of men, horses, water, wind, steam, or any other
adequate power, and may be constructed either on a single or multiplied
principle; and for regulating the descent of the tree while the machine is in

page_text: motion, I adopt the following method, that is to say, by pressure by means of
a screw or screws upon the arbors or other parts of the wheel and pinions, as
shewn at B in Figure 1. g, h, is a piece of wood fast at g, drawn down at h
by a screw M towards the piece of frame O, or by the pressure of an oil cup
or gland of iron, and its brass brass upon the spindle, as shewn in Drawing,
Figure 4, or by pressure or weight on other part of the machine that will
regulate the descent.
In witness whereof, I, the said Joseph Chirm, have hereunto set my
hand and seal, the First day of June, in the year of our Lord One
thousand eight hundred and one.