IMPROVE MENTS IN LAMPS
Year: 1840

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
IIENRY KEMPTON, of Pentonville, in the County of Middlesex, Gentleman,
send greeting.
WHEREAS Her present most Excellent Majesty Queen Victoria, by Her
Letters Patent under the Great Seal of Great Britain, bearing date at
Westminster, the Thirty-first day of December, in the fourth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said William Henry Kempton, Her especial licence, full power, sole privilege
and authority, that I, the said William Henry Kempton; my exors,, adiñors,
and assigns, or such others as I, the said William Henry Kempton, my
exors, admors, or assigns, should at any time agree with, and no others, from
time to time and at all times 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 Invention of "IMPROVE
MENTS IN LAMPS;" in which said Letters Patent is contained a proviso that I,
the said William Henry Kempton, should cause a particular description of
the nature of iny said Invention, and in what manner the same is to be
performed, to be inrolled in Her said Majesty's High Court of Chancery
within six calendar months next and immediately after the date of the said
in part recited Letters Patent, as in and by the same, reference being
thereunto had, will more fully and at large appear.

page_text: 'NOW KNOW YE, that in compliance with the said proviso, I, the said
William Henry Kempton, do hereby declare that the nature of my Invention,
and the manner in which the same is to be performed, are fully described
and ascertained in and by. the following statement thereof, reference being
had to the Drawings hereunto annexed, and to the figures and letters
marked thereon (that is to say)
My Invention relates to a mode of applying glass chimneys of lamps, and
in such manner that the air which passes into the chimney of a lamp with
the flame is obtained from an open space around the flame and above the
wick or point of combustion; and further, the opening into.the chimney at its
lower end is contracted to a less diameter than the continuation of the
chimney, and the lower part of the chimney is also above the wick, and
consequently above the commencement of the flame or point of ignition,
whereby the air so applied around the wick will have a very beneficial effect
in producing a more brilliant light than when glass chimneys of the ordinary
construction are only used, and the uper part of the wick will not be subject
to that high degree of heat to which the wicks of lamps are where the air
is obtained below the point of ignition, and deflected against the flame by
deflecting instruments used within the chimneys; the lamps so circumstanced
being now commonly called" solar lamps." And in order that İnvention
may be most fully understood and readily carried into effect, I will proceed
to describe the Drawing hereunto annexed.
13.
:
....
DESCRIPTION OF THE DRAWING.
my
Figure 1 shews the burner of a lamp with my improvements applied
thereto, some of the parts being in section.
Figure 2 shews the glass chimney separately in section.
Figure 3 shews a side view and plan of the holder for supporting the glass
chimney. 6 is the glass chimney, which is contracted at its lower end, so that
the opening into the chimney is of c considerably less diameter than the con-
tinuation or upper part of the chimney; and it will seen that the contracted
opening into the chimney is produced by the lower end of the glass chimney
being turned 'inwards; but it will be evident that the contracting of the
opening into the chimney may be obtained by other means, as will be hereafter
described. c is the chimney holder, 'which is formed that the glass chimney
is supported and held considerably above the wick or point of ignition or com-
mencement of the flame, whereby the air to support combustion enters all around
the flame above the commencement of the flame, and passes up with the flame
and enters with it through the contracted opening of the lower end of the

page_text: chimney, and it is the peculiar combination of circumstances brought about
by the arrangement shewn, which constitutes the novelty of my Invention.
First, that the lowest part of the chimney shall be above the wick or
commencement of the flame, and the space below the chimney open to the
air. And
Second, that the opening into the chimney at its lower end shall be of
less diameter than the upper part of the chimney.
Figures 4 and 5 shew another arrangement, whereby a similar result is brought
about; and in place of the lower end of the chimney being turned inwards,
the circular disc d, on which the lower end of the glass chimney rests, acts in
substitution of the closing in of the lower end of the glass itself, and contracts
the entrance into the glass chimney: The chimney shewn in Figure 4 is a
simple cylindrical chimney of the ordinary construction, and the dotted lines
shew that the form of the chimney may be varied.
Having thus described the nature of my Invention, and the manner of
performing the same, I would have it understood that what I claim as the
Invention secured by the above-recited Letters Patent is, the mode herein
described of applying the chimneys of lamps.
In witness whereof, I, the said William Henry Kempton, have hereunto
set my hand and seal, this Thirtieth day of June, in the year of our
Lord One thousand eight hundred and forty-one.
WILL H (L.S.) KEMPTON.
AND BE IT REMEMBERED, that on the Thirtieth day of June, in the
year of our Lord 1841, the aforesaid William Henry Kempton came before
our said Lady the Queen in Her Chancery, and acknowledged the Specifi-
cation aforesaid, and all and every thing therein contained and specified, in
form above written. And also the Specification aforesaid was stamped
according to the tenor of the Statute made for that purpose.
Inrolled the Thirtieth day of June, in the year of our Lord One