AN IMPROVEMENT IN THE MANUFACTURE OF PERFORATED GLASS."
Year: 1854

page_text: LETTERS PATENT to James Hartley, of Sunderland, for the Invention of
"AN IMPROVEMENT IN THE MANUFACTURE OF PERFORATED GLASS."
PROVISIONAL SPECIFICATION left by the said James Hartley at
the Office of the Commissioners of Patents, with his Petition, on the
24th November 1854.
I, JAMES HARTLEY, of Sunderland, do hereby declare the nature of the
Invention for "AN IMPROVEMENT IN THE MANUFACTURE OF PERFORATED GLASS"
to be as follows:-
Heretofore glass has been perforated with numerous holes, side by side,
by means of rollers, having thereon projections of the forms of the intended
holes, and the rollers have been used to act on the glass, when the glass
has been in a highly heated state; and it has also been proposed to pro-
duce like perforated glass by having like projections on plates or dies, and
caused to be pressed on the glass when it has been in a highly heated state.
Now, my. Invention consists of employing a number of circular mills or
cutters, fixed on an axis, and more or less apart, according as it is desired to
have the holes more or less distant from each other; and such mills or cutters
are caused to rotate, and in their rotation to bring up water and grit, and thus
to act on the glass as the same is gradually pressed to the cutters or mills till
cuts-of-the-size-desired-are-made-through-the-glass

page_text: .
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said James Hartley in the Great Seal Patent Office on the
23rd May 1855.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JAMES
HARTLEY, of Sunderland, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date, the Twenty-fourth day of November,, in the year of our
Lord One thousand eight hundred and fifty-four, in the eighteenth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said James Hartley, Her special licence that I, the said James Hartley,
my executors, administrators, and assigns, or such others as I, the said
James Hartley, 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, exer-
cise, and vend, within the United Kingdom of Great. Britain and Ireland,
the Channel Islands, and Isle of Man, an Invention for "AN IMPROVEMENT
.IN THE MANUFACTURE OF PERFORATED GLASS," upon the condition (amongst others)
that I, the said James Hartley, by an instrument in writing under my hand
and seal, 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 James Hartley, do hereby declare the
nature of the said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement thereof (that is to say):-
Heretofore glass has been perforated with numerous holes, side by side, by
means of rollers, having thereon projections of the forms of the intended holes,
and the rollers have been used to act on the glass when the glass has been in
a bighly-heated state; and it has also been proposed to produce-like perforated-
glass by having like projections on plates or dies, and caused to be pressed on
the glass when it has been in a highly heated state. Now, my Invention con-
sists of employing a number of circular mills or cutters, fixed on an axis, and
more or less apart, according as it is desired to have the holes more or less
distant from each other; and such mills or cutters are caused to rotate, and in
their rotation to bring up water and grit, and thus to act on the glass as the
same is gradually pressed to the cutters or mills till cuts of the size desired are
made through the glass.

page_text: Having thus stated the nature of my said Invention, I will proceed to
describe the manner of performing the same.
DESCRIPTION OF THE DRAWING.
Figure 1 is a transverse section of a machine used in carrying out my
Invention, and Figure 2 is a plan thereof. a, a, is the framing; b is an axis,
supported on bearings c, c, as shown; d is a pulley or drum, by which the
axis receives a quick rotatory motion by a band from a steam engine or
other power; e, e, are mills or cutters, fixed on the axis b, as shown, they being
kept apart by tubular washers f, according to the distance apart of the holes
or perforations which are to be made in the sheet glass; and this may be
varied from time to time by placing the cutters or mills e, e, nearer to or
further from each other, varying the washers accordingly. is a grooved
trough below the cutters, in which water and sand are kept, so that in the
revolution of the cutters or mills, they may bring up water and sand to aid
them in their cutting action. h is another trough, which also contains the
water and sand, and from which the workman from time to time supplies
the upper trough g, as required. is a table, having a ledge or projection j at
one side, which forms a straight edge to rest the one edge of the sheet of glass
against, and thus to keep it true. By having this ledge or projection j, divided
into a scale, the workman may be thereby aided in making the successive cuts
at regulated distances apart. The workman places the sheet of glass to be
cut down on to the cutters in such manner that the sheet of glass at one
end is supported by the table, and the other end is supported by his hands,
and he allows the sheet gradually to descend on the cutters or mills as they
cut into and through the glass.
Having thus described the nature of my Invention, and the manner of
performing the same, I would have it understood that I make no claim to
the parts of the machine separately; but what I claim is, the manufacture
of perforated sheets of glass by employing several cutters or mills on an axis,
as herein described.
In witness whereof, I, the said James Hartley, have hereunto set my
hand and seal, this Nineteenth day of May, in the year of our Lord
One thousand eight hundred and fifty-five.
35 Witness,
JNO. ALCOCK.
JAMES HARTLEY. (L.S.)