IMPROVEMENTS IN CORONETS, DOMES, AND COVERS FOR GLOBES AND OTHER FORMS OF GLASSES FOR GAS LIGHTS
Year: 1879

page_text: LETTERS PATENT to Samuel Spencer, of West Square, St. George's Road,
Southwark, in the County of Surrey, for the Invention of "IMPROVEMENTS
IN CORONETS, DOMES, AND COVERS FOR GLOBES AND OTHER FORMS OF GLASSES
FOR GAS LIGHTS."
Sealed the 18th July 1879, and dated the 28th March 1879.
PROVISIONAL SPECIFICATION left by the said Samuel Spencer at the Office
of the Commissioners of Patents on the 28th March 1879..
SAMUEL SPENCER, of West Square, St. George's Road, Southwark, in the County
of Surrey.
"IMPROVEMENTS IN CORONETS, DOMES, AND COVERS FOR GLOBES AND
OTHER FORMS OF GLASSES FOR GAS LIGHTS."
The Invention has for its object improvements in coronets, domes, and covers for
globes and other forms of glasses for gas lights in order to improve the light from
the burner.
For this purpose I form the coronet, dome, or cover in two parts fitting the one
over the other, each being formed with perforations of any desired shape.
The outer part is provided with a knob or handle by which it can be rotated, so
as to increase or decrease the area of the openings through which the air and
products of combustion can pass out from the interior of the globe or other glass,
according to the amount of air required to produce the best light to the gas flame,
by which an increased temperature is also obtained, thereby improving the con-
sumption or preventing the formation of smoke.
These coronets, domes, or covers may be made of metal, glass, tale, various
descriptions of pottery, or of other suitable material or combinations of material.
In some cases one of the parts may be formed as a ring fitting on the globe or
other glass, and the other part be made to work up and down so as to regulate the
distance beween the two, and thereby regulate the dimensions of the air passage.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Samuel Spencer in the Great Seal Patent Office on the 27th
September 1879.
SAMUEL SPENCER, of West Square, St. George's Road, Southwark, in the County
of Surrey.
"IMPROVEMENTS IN CORONETS, DOMES, AND COVERS FOR GLOBES AND
OTHER FORMS OF GLASSES FOR GAS LIGHTS."
The Invention has for its object improvements in coronets, domes, and covers
for globes and other forms of glasses for gas lights in order to improve the light
from the burner.
For this purpose I form the coronet, dome, or cover in two parts fitting the one
over the other, each being formed with perforations of any desired shape. The
outer part is provided with a knob or handle by which it can be rotated, so as
to increase or decrease the area of the openings through which the air and products
of combustion can pass out from the interior of the globe or other glass, according
to the amount of air required to produce the best light to the gas flame, by which
an increased temperature is also obtained, thereby improving the consumption or
preventing the formation of smoke.
These coronets, domes, or covers may be made of metal, glass, talc, various
descriptions of pottery, or of other suitable material or combinations of materials.
In some cases one of the parts may be formed as a ring fitting on the globe or
other glass, and the other part be made to work up and down so as to regulate the
distance between the two, and thereby regulate the dimensions of the air passage.
And in order that my said Invention may be more clearly understood and
readily carried into effect, I will proceed, aided by the accompanying Drawings,
more fully to describe the same.
Figure 1 is a section, Figure 2 is an elevation, and Figure 3 is a plan of a
coronet, dome, or cover for a globe or other form of glass for a gas light.
The dotted lines a, a, represent the upper portion of a globe or other form of
glass for a gas light, on the upper edge of which the coronet, dome, or cover is
supported. The latter is formed of two parts b, c, fitting one over the other, each
being formed with perforations 61, c', of any desired shape.
The outer part c is provided with a handlo c by which it can be rotated, so as to
increase or decrease the area of the openings through which the air and products of
combustion can pass out from the interior of the globe or other shaped glass,
according to the amount of air required to produce the best light to the gas flame,
by which an increased temperature is also obtained, thereby improving the
consumption or preventing the formation of smoke.
These coronets, domes, or covers may be made of metal as represented in the
Drawing, or of glass, talc, various descriptions of pottery, or of other suitable
material or combinations of materials, and they may be made of various designs.
In some cases one of the parts may be formed as a ring fitting on the globe or
other shaped glass, and the other part be made to work up and down so as to
regulate the distance between the two, and thereby regulate the dimensions of the
air passage or passages. I have not thought it necessary to give a Drawing
representing this modification, as such will be readily understood from the above
description.
Having thus described the nature of my said Invention and the mode I have
found to answer in carrying the same into effect, I would have it understood that
what I claim is, forming coronets, domes, and covers in two parts fitting together,

page_text: one of which is capable of being moved upon the other so as to regulate the area of
the openings through or between them, in manner substantially as herein shown
and described and for the purpose stated.
In witness whereof, I, the said Samuel Spencer, have hereunto set my hand
and seal, this Twenty seventh day of September, in the year of our Lord
One thousand eight hundred and seventy nine.
SAM SPENCER. (L.S.)