A NEW METHOD FOR INCREASING AND PROJECTING LIGHT PRODUCED BY LAMPS AND OTHER MEANS
Year: 1818

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
LESTER, of the Commercial Road, in the County of Middlesex, Engineer, do
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 Second day of June, in the fifty-eighth year of His reign, did
give and grant unto me, the said William Lester, my exors, adiñiors, and
assigns, His special licence, full power, sole privilege and authority, that I, the
said William Lester, my exors, admors, and assigns, during the term of
years therein expressed, should and lawfully might, use, exercise, and vend,
within England, Wales, and the Town of Berwick-upon-Tweed, and also in
His Majesty's Colonies and Plantations abroad, my Invention of "A NEW
METHOD FOR INCREASING AND PROJECTING LIGHT PRODUCED BY LAMPS AND OTHER
MEANS; in which Letters Patent there is contained a proviso, obliging me,
the said William Lester, 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 six calendar months 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.

page_text: NOW KNOW YE, that in compliance with the said proviso, I, the said
William Lester, do hereby declare that my Invention consists of a mirror on
the inside of a frustrum of a hollow cone, of the angle described by the letter A
in the plan No. 1 hereunto annexed, or a small portion more acute or more
obtuse, fixed or adjusted by appropriate machinery before the flame of a lamp
or candle, the small end of the frustrum towards the centre of the flame, and
the flame forming an angle with the frustrum more acute or more obtuse,
as seen at B in the same plan; the point of the angle a, the centre of the flame
when adjusted to diffuse the light throughout the extent of the scope of the
mirror; the point of the angle b, the centre of the flame.when adjusted to
project the light in a less space than the whole scope of the mirror; the letter
C, a mirror mounted before a lamp having a couple of tin sockets united
together and rivetted to the side of the mirror, sliding upon two wires c, c,
which wires are coiled round the lamp and soldered to a socket d, which
revolves in part round the lamp, and slides up and down, by which the mirror
is adjusted to the centre of the flame; the letter D, a mirror in a horizontal
position, to project the light downwards without the flame; when applied under
glass lens or skylights to project the light into a room or space below; the
letter E, a mirror in a reverse position, to project the light upwards when
applied to a lamp or candle; the letter F, a pair of -mirrors-mounted upon a
bridge and socket made of metal, and made fast by the snugg or tennon, and
fitting into a mortice hole, and made in the body of the mirror, and turned up
to keep the snugg or tennon in the mortice; the letter G; a pair of mirrors
mounted as above, but in an inclined position, with an aperture in the top of
the socket to admit the weak of a candle to pass through it, on the tallow of
which it rests, and the socket fitting the candle easy, by which it sinks down as
the candle is consumed, preserving its proper distance from the flame, the
mirror to be fixed on the bridge at that angle from which the light is required
to be projected, the mirror having a small piece cut out of its side, as seen at
f, to fit the convexity of the socket; the letter II in the plan No. 2, hereunto
also annexed, a large mirror with the tool g, by which it is turned in the
inside, either held in the hand or regulated by machinery, the mirror having a
revolving motion, either on the potter's lathe or wheel, and the body of the
mirrors being made of potter's clay, and glazed with a solution of platina, in
the way the potters make the ware they called silver lusture; the letter I, a
long brush, either held in the hand or adjusted by machinery, so as to distribute
the solution of platina over the inside of the frustrum, to give the mirror a
smooth and regular face; the letter K in the plan No. 1, a flat tile with a
smooth surface, glazed with platina, for projecting light from windows into

page_text: rooms, by being placed on a board hung on hinges, to find the proper angle at
the bottom of the window inside the room.
In witness whereof, I, the said William Lester, have hereunto set my
hand and seal, the Twenty-eighth day of November, in the year of our
Lord One thousand eight hundred and eighteen.
AND BE IT REMEMBERED, that on the Twenty-eighth day of November,
in the year of our Lord 1818, the aforesaid William Lester came before our
said Lord the King in His Chancery, and acknowledged the Specification
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 Statutes made for that purpose.