IMPROVE- MENTS IN THE MANUFACTURE OF SAFETY FUSES, PARTS OF WHICH ARE APPLI CABLE TO THE MANUFACTURE OF PIPES AND TUBES OF LEAD AND OTHER SOFT METAL GUTTA PERCHA CAOUTCHONG BITUMEN AND EARTHENWARE
Year: 1861

page_text: LETTERS PATENT to Thomas Davey, of Tucking Mill, Camborne, in
the County of Cornwall, Manufacturer, for the Invention of "IMPROVE-
MENTS IN THE MANUFACTURE OF SAFETY FUSES, PARTS OF WHICH ARE APPLI
CABLE TO THE MANUFACTURE OF PIPES AND TUBES OF LEAD AND OTHER SOFT
METAL GUTTA PERCHA CAOUTCHONG BITUMEN AND EARTHENWARE"
Sealed the 21st March 1862, and dated the 24th September 1861.
PROVISIONAL SPECIFICATION left by the said Thomas Davey at the
Office of the Commissioners of Patents, with his Petition, on the 24th
September 1861.
I, THOMAS DAVEY, of Tucking Mill, Camborne, in the County of Corn-
wall, Manufacturer, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN THE MANUFACTURE OF SAFETY FUSES, PARTS OF WHICH ARE
APPLICABLE TO THE MANUFACTURE OF PIPES AND TUBES OF LEAD AND OTHER SOFT
METAL, GUTTA PERCHA, CAOUTCHOUC, BITUMEN, AND EARTHENWARE," to be as
follows:-
My improvements in the manufacture of safety fuses consist in coating the
fibrous material of which the fuse is partly composed with gutta percha or
its compounds, caoutchouc, soft metal, or other suitable adhesive material,
and in the employment of wire in the manufacture of safety fuses, either as
a substitute for or in combination with fibrous material, or as a substitute for
or in combination with lead or other soft metal, and in the manufacture of
pipes and tubes in combination with lead or other soft metal, gutta percha,
caoutchouc, bitumen, or earthenware.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Thomas Davey in the Great Seal Patent Office on the 24th
March 1862.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, THOMAS
DAVEY, of Tucking Mill, Camborne, in the County of Corwall, Manufacturer,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-fourth day of September, in the year of our
Lord One thousand eight hundred and sixty-one, in the twenty-fifth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Thomas Davey, Her special licence that I, the said Thomas Davey,
my executors, administrators, and assigns, or such others as I, the said
Thomas Davey, my executors, administrators, and assigns, should at any
time agree with, and no others, from time to time and at all times
thereafter during the term therein expressed, should and lawfully might
make, use, exercise, and vend, within the United Kingdom of Great Britain
and Ireland, the Channel Islands, and Isle of Man, an Invention for
"IMPROVEMENTS IN THE MANUFACTURE OF SAFETY FUSES, PARTS OF WHICH ARE
APPLICABLE TO THE MANUFACTURE OF PIPES AND TUBES OF LEAD AND OTHER SOFT
METAL, GUTTA PERCHA, CAOUTCHOUC, BITUMEN, AND EARTHENWARE,"
upon the
condition (amongst others) that I, the said Thomas Davey, my executors or
administrators, by an instrument in writing under my, or their, or one of
their hands and seals, should particularly describe and ascertain the nature
of the said Invention, and in what manner the same was to be performed,
and cause the same to be filed in the Great Seal Patent Office within
six calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that I, the said Thomas Davey, do hereby declare
the nature of my said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the fol-
lowing statement thereof, that is to say:―
My improvements in the manufacture of safety fuses consist in coating the
wires or fibrous materials, or both wires and fibrous materials of which the
fuse is partly composed, with gutta percha or its compounds, caoutchouc,
waterproof varnish, soft metal, or other suitable adhesive material; also in
the employment of wires as a substitute for or in combination with fibrous
materials placed intermediately or covering such wires, or as a substitute
for or in combination with lead or other soft metal.

page_text: I do not confine myself to any particular kind of machinery for carrying
my Invention into effect, as my improvements may be applied in various ways
As an example, I take wires or fibrous materials and wires coated or other-
wise, and twist them in the ordinary manner round a centre of powder issuing
from a funnel, and converging in a central tube, thereby forming a twisted
cord with a continuous centre or core of powder. I then pass the partially
manufactured fuse through gutta percha, caoutchouc, waterproof varnish,
lead, or other soft metal either in solution, or made sufficiently plastic by heat
to enable it to combine. I complete the fuse by drawing it through a tube or
tubes or between rollers, or by applying hydraulic or other pressure such as
is generally employed in the manufacture of tubes or pipes.
The
tubes of lead and other soft metal, gutta percha, caoutchouc, bitumen, and
earthenware, consist in embedding in or incorporating wire with these
materials during their manufacture, which may be performed in manner
following:-First, I take a wire or wires wound into a spiral or spirals
either one way or crossing each other, around and completely covering which
I cast or mould a short piece of pipe of the metal or material intended to
be manufactured; I then pass such metal or material with the wire em-
bedded through a series of rollers with graduated grooves, and draw it out
on a mandril to the required length and diameter; or, secondly, I use the
more general mode of manufacturing pipes by hydrostatic or other pressure.
In this case the piston which forces the metal or plastic material through
the annular space between the mandril and die may work on a hollow bar
into the end of which a mandril is fixed of the required size, but smaller
than the hollow bar; through this bar or pipe the wires intended to be
incorporated are passed, which are drawn through apertures or holes at the
end of the bar, and passed outside or surrounding the mandril. Between
and around such wires the metal or plastic material is forced before enter.
ing the die. Twist may be communicated to the wires by causing the
hollow bar through which the wires are passed to revolve, carrying the wires
around with it.
parts of my Invention which apply to the manufacture of pipes and
And having now described the nature of my said Invention, and in what
manner the same is to be performed, I declare that I do not limit myself to
the precise processes herein-before described for carrying my Invention into
effect; but I claim,-
First, the employment of wire in the manufacture of safety fuses as a
substitute for or in combination with fibrous materials or lead, or other soft
metal, as herein-before described.

page_text: Second, coating the wires or fibrous materials, or both wires and fibrous
materials employed in the manufacture of safety fuses with some adhesive
material or composition.
And, third, the manufacture of pipes and tubes of lead or other soft
metal, gutta percha, caoutchouc, bitumen, and earthenware, by imbedding
or incorporating wire with them during their manufacture.
In witness whereof, I, the said Thomas Davy, have hereunto set my
hand and seal, this Twenty-first day of March, One thousand eight
hundred and sixty-two.
THOMAS DAVEY. (L.S.)