A FURTHER IMPROVEMENT IN THE METHOD OF RENDERING DWELLING HOUSES, THEATRES, HOSPITALS, PRISONS, SHIPPING, CONSERVATORIES, GREEN HOUSES, HOT HOUSES, AND EVERY OTHER KIND OF BUILDING, AIR AND WATER TIGHT, AS FAR AS RELATES TO THE GLAZING BY MEANS OF A LAP MADE OF COPPER, OR ANY OTHER METAL OR SEMI-METAL, PREPARED BY MACHINERY FOR THAT PURPO3E
Year: 1811

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, DAVID
STEWART, of Stamford Street, in the Parish of Christ Church, in the County
of Surry, Architect, send greeting.
WHEREAS His most Excellent Majesty King George the Third did, by
His Letters Patent under the Great Seal of the United Kingdom of Great
Britain and Ireland, bearing date at Westminster, the Twenty-second day of
March, in the fifty-first year of His reign, give and grant unto me, the said
David Stewart, my exors, adñiors, and assigns, His especial licence, full
power, sole privilege and authority, that I, the said David Stewart, my
exors, adfiors, and assigns, during the term of years therein mentioned,
should and lawfully might make, use, exercise, and vend, within England,
Wales, and the Town of Berwick-upon-Tweed, my Invention of "A FURTHER
IMPROVEMENT IN THE METHOD OF RENDERING DWELLING HOUSES, THEATRES,
HOSPITALS, PRISONS, SHIPPING, CONSERVATORIES, GREEN HOUSES, HOT HOUSES,
AND EVERY OTHER KIND OF BUILDING, AIR AND WATER TIGHT, AS FAR AS
RELATES TO THE GLAZING BY MEANS OF A LAP MADE OF COPPER, OR ANY OTHER
METAL OR SEMI-METAL, PREPARED BY MACHINERY FOR THAT PURPO3E;" in which
said Letters Patent there is contained a proviso obliging me, the said David
Stewart, by an instrument in writing under my band and seal, to cause a
particular description of the nature of my said Invention, and in what mauner
the same is to be performed, to be enrolled in Ilis Majesty's High Court of
Chancery within six calendar months 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.

page_text: NOW KNOW YE, that in compliance with the said proviso, I, the said
David Stewart, do hereby declare that my. said Invention is described and
ascertained in and by the Drawings hereunto annexed, and the following
explanation and description thereof (that is to say):-
I make the frames of any wood or metal of which sashes or frames are
usually made, and of such lengths, breadths, shapes, or sizes as the nature of
the building may require. And I do fix the upper and lower ends of the
panes of glass into the frame by means of a lap or rabbet made of copper, or
any other metal, semi-metal, or composition of metals sufficiently strong and
pliable, and long enough to reach from one bar to the other, and so formed or
bent at the edges lengthwise as to lap over the lower end of the first or upper
pane, and under the upper end of the next or succeeding lower pane, as
shewn by Fig. 1st, the red line describing the said lap or rabbet; the green
line, the glass, which is fixed in the lap or rabbet with putty or cement so as
effectually to prevent the wet or air from penetrating through or between the
laps or rabbets. The sides of the panes or fixed to the bars with putty or
cement, the same as in common glazing. I do also form my said laps or
rabbets in the following manner :-I cut the copper or other semi-metal, or
composition of metals, into narrow slips, which I point at one end (in order to
give greater facility in passing them through a pair of tools, moulds, or dies
hereafter mentioned or described, with the hand), of the width of three fourths
of an inch to two inches, or any other width that the slope or pitch of the
roof may require, and of the length of from ten to twelve fect, or any other
required length. I do also pass the pointed end of the said slip through this
said pair of tools, moulds, or dies, male and female, four inches long and three
inches wide (or of any other required length or breadth), as at Fig. 2nd, made
of cast iron, wrought iron, or any other metal, semi-metal, or composi-
tion of metals sufficiently hard to answer the purpose, or of wood lined
with iron or any other proper metal or semi-metal, or composition of metals,
by means of a pair of pincers attached to a rope or chain continued to the
wheel or windlass of a common draw bench, such as is used for wiredrawing
and similar purposes. I draw the said slip through the said pair of tools,
moulds, or dies, which I affix to the end of the said draw bench by a clam,
screw bolts and nuts, or otherwise the said screw bolts and nuts keeping the
two parts of the said pair of tools, moulds, or dies together, and which may
bc loosened or screwed faster at pleasure. This is necessary in the first
place to let the metal pass thro' easier for the pincers to lay hold of the
end of the lap or rabbet; and in the second place the metal sometimes breaks in
passing through the said pair of tools, moulds, or dies, which requires, them to

page_text: The
be loosened by turning nuts to get the end of the metal at liberty again.
opening or aperture in the said pair of tools, moulds, or dies, where the said
slip is to enter, is formed as shewn by Fig. 3rd, but gradually inclining to curve
until it takes the form shewn by Fig. 4 on the reverse side of the said pair
of tools, moulds, or dies, from which it enters, in which form the said laps or
rabbets are nearly in after passed through the first part of the tools, moulds,
or dies. I do also pass and draw the slips, laps, or rabbets, in a similar manner
through a second pair of tools, moulds, or dies, made also of cast iron, wrought
iron, or any other metal, semi-metal, or composition of metals; the opening or
aperture in the second pair of tools, moulds, or dies, where the lap or rabbet
enters, is formed as shewn by Fig. 5th, and gradually inclined until it takes
the form shewn by Fig. 6th, on the reverse side of the pair of tools, moulds,
or dies, from which it enters where the said slip, lap, or rabbet comes out, in
which form the said laps or rabbets are nearly in, after having passed through
the said pair of tools, moulds, or dies. The slips, laps, or rabbets are then fit
to be cut into the exact lengths required by the breadth of the panes, or with
between the bars of the frame, which I do with a pair of shears, or other sharp
instrument; the said copper or other metal lap or rabbet may be turned by the
hand, but the process is more tedious and attended with much greater expence.
In witness whereof, I, the said David Stewart, have hereunto set my
hand and seal, this Twenty-fourth day of August, in the year of our
Lord One thousand eight hundred and eleven.
Surrey,
Gentleman, maketh oath that he is well acquainted with the handwriting of
David Stewart, party to the annexed Deed Poll purporting to be the Specifica-

page_text: tion of a Certain Invention of A Further Improvement in the Method of
Rendering Dwelling Houses, Theatres, Hospitals, Prisons, Shipping, Conser-
vatories, Green Houses, Hot Houses, and every other Kind of Building Air
and Water Tight, so far as relates to the Glazing by means of a Lap made of
Copper, or of any other Metal or Semi-metal prepared by Machinery for that
Purpose, and also to the bandwriting of William Sheppard, one of the sub-
scribing Witnesses to the said Deed Poll, and that the names D. Stewart and
W Sheppard severally subscribed thereto, are of the respective handswriting
of the said David Stewart and William Sheppard.
AND BE IT REMEMBERED, that on the Oath of Robert Stewart, the
Specification aforesaid was enrolled word for word, as above written. And 1
also the Specification aforesaid was stampt according to the tenor of the
Statute made for that purpose.
Inrolled the Thirteenth day of September, in the year of our Lord One
thousand eight hundred and eleven.