AN IMPROVEMENT OR IMPROVEMENTS IN THE CONSTRUCTION OF THE GLASS HOLDERS AND GLASS CHIMNIES OF GAS BURNERS
Year: 1838

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, HUGH
FORD BACON, of Fen Drayton, in the County of Cambridge, Clerk, send
greeting.
WHEREAS Her present Majesty Queen Victoria, by Her Letters Patent
under the Great Seal of the United Kingdom of Great Britain and Ireland,
bearing date at Westminster, the Tenth day of November now last past,
did give and grant unto me, the said Hugh Ford Bacon, Her especial licence,
full power, sole privilege and authority, that I, the said Hugh Ford Bacon,
my executors, administrators, and assigns, or such others as I, the said
Hugh Ford Bacon, my executors, administrators, or assigns, should at any
time agree with, and no others, from time to time and at all times thereafter
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 "AN IMPROVEMENT OR IMPROVEMENTS IN THE
CONSTRUCTION OF THE GLASS HOLDERS AND GLASS CHIMNIES OF GAS BURNERS;" in
which said Letters Patent there is contained a proviso obliging me, the said
Hugh Ford Bacon, by an instrument in writing under my hand and seal,
particularly to describe and ascertain the nature of my said Invention, and
in what manner the same is to be performed, and to cause the same 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 recited Letters
Patent, as in and by the same, reference being thereunto had, will more
fully appear.

page_text: NOW KNOW YE, that in compliance with the said proviso, I, the said
Hugh Ford Bacon, do hereby declare that the Improvements which I have
invented in the Glass Holders and Glass Chimnies of Gas Burners, apply
chiefly to Argand gas burners, and are designed for the purpose of keeping the
chimney more firm and secure in its position in the holder, and diminishing
the risk of breakage, and avoiding the shadow cast by the stripping or border
of open brass work which ordinarily surround the glass.
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For effecting these objects, I cause the lower end of the glass chimnies in
common use to be constructed in the manner shewn in Fig. 1, at A, A, thus
forming a narrowed part or border turned inwards. Figure 2 represents in
section the said glass as connected with the holder and Argand gas burner
B, B, and C, C,-B, B, representing an external hollow cone usually called a
gallery cone," for regulating the outer current of air, and C, C, an internal
cone which limits the supply of air to the internal part of the flame. A
circular rim of brass D, D, is connected by radial bars with a cylindrical
hoop E, which rests upon a projecting shoulder of the burner F, Figure 4.
The circular rim D, D, has the inside of its outer edge turned off at an
angle somewhat more obtuse than that of the contracted border A, A, and
upon this the glass chimney rests. The outer cone (B, B) is connected, by
brazing or burnishing, or otherwise, with the inner edge of the rim D, D.
To the inner surface of the upper part of this cone, at equidistant points, are
attached three metal springs G, G, G, bent outwards in manner shewn at
Figure 2, and carried through three upright slits or guides in the cone at its
lower edge, so that when the glass chimney is put done with its narrowed
end over the cone, the springs contract until the chimney reaches its seat
in the outer rim D, D, when they again expand and press slightly against
the inner part of the chimney, which by this means kept securely seated
on the rim D, D, of the glass holder. In case where no outer cone B, B,
is used, these springs may be fixed to the seat of the outer rim D, D, as in
Figure 5. Another mode of securing the glass chimney in its seat is
represented at Figures 6 and 7. The outer cone is connected with a circular
rim of metal H, the upper part of which is cut with a slope or inclination
inwards, and the lower is continued cylindrical as at I, which cylindrical
part is small enough to pass through the narrowed aperture of the glass
chimney A, A, and formed into a screw. This part is put into the chimney
at its wider end and passed down until it is stopped by the narrowed
border at the bottom, below which the screw I projects. Upon this screw an
outer rim, D, D, Figure 7, having a female screw J formed within it, is
fastened, between which two rims the glass is held in position in manner

page_text: shewn by dotted lines in Figure 6. The two parts however are not screwed
tight upon the glass, but a little play is allowed it, so that it may expand and
contract with all the variation of heat and cold. At the bottom of the sloping
part of the rim D, D, a small groove or hollow may be made, in which may
be lodged and secured, by three pins at equidistant points, a spring of brass
wire coiled once round until the two ends nearly meet, and having three bends
upwards, one between each of the attaching pins. The bottom of the chimney
rests upon the three bent parts of this circular spring, and is by it slightly
pressed upwards against the sloping part H of the inner rim, and made to
sit more steady and secure than would otherwise be the case when there
are slight variations in the thickness of the glasses. Another mode of
fastening the glass chimney on the holder by means of this narrowed border
is shewn at Figure 8. Here there is no cylindrical or screwed part as at I,
in Figure 6, instead of which three turnbuckles K, K, K, Figures 8 and 9,
are fixed by means of screwed pins, which are rivetted to the lower side of the
three radial bars L, L, L, in Figure 9, connecting the inner loop E with the
rim H. The turnbuckles K, K, K, can be placed at any position on the
screwed pins that may be made necessary by the thickness of the glass. To
fix the glass in this holder the three turnbuckles are turned inwards, so as to
pass below the narrowed border of the glass chimney, and are then turned
outwards, and each of them is carried by the screw on the vertical pins till the
glass is held sufficiently firm between the three turnbuckles and the angular
or sloping part of the rim (H), but not so tightly as to create a danger of the
glass breaking by expansion with heat, as shewn in Figure 8. Another
mode of fixing the glass chimney on the holder is shewn at Figure 10.
The glass rests with its narrowed part or border A, A, on the sloping
part of the rim D, D, to the inner edge of which rim the outer cone B, B,
is fixed, as in Figure 2. The hoop or ring E which attaches the holder
to the burner is connected by three radial bars L, L, L, Figure 12, with a
flat circular rim M, which is connected with the rim D, D, by three equi-
distant screws (one of which is shewn at N in Figure 10, and the points
of all three in Figure at N, N, N). These screws pass through three slits in
the rim M, seen at O, O, O, Figure 12, and fasten in D, D, one of the screw
holes for the purpose being shewn at Q, Figure 13. The heads of the screws
(one of which is seen at N in Figure 10, preserve the connections between the
two rims D, D, and M, allowing M to move backwards and forwards as far as
the slits 0, 0, 0, Figure 12, will permit, and which motion is sufficient to
throw the turnbuckles P, P, P, into the radial position shewn in Figure 11.
The turnbuckles pass through three holes in the cone B, B, and are projected

page_text: forward and retracted by the sides of their holes pushing alternately against
them with the alternating movements of the rim M, one of them as thrown
out by the sides of its hole pushing against it being shewn at P, Figure 10.
Their position when retracted or thrown back by reversing the movement of
the ring M is shewn by dotted lines in Figure 11, their ends just resting on
the edge of the holes, when the narrowed end of the glass chimney can pass
freely over them; this being projected by the movement of the rim M until
they nearly touch the side of the glass, they effectually secure it in the
holder. The radial bars L, L, L, are carried up the side of the hoop E with
sufficient strength to have cavities cut into them to receive the inner ends of
the turnbuckles P, P, P, and which are secured therein by means of pius
or rivets on which they turn, one of which is shewn at P in Figures 10 and
14. The section in Figure 11 is taken at the dotted lines **in Figure 10.
Figure 5 is a top view or plan of Figure 5, shewing the manner in
which the springs G, G, G (one of which is shewn separately in Figure 15),
are fastened to the rim D, D. If it should be necessary wholly or in
part to prevent the retraction of the spring G, G, G, when the glass is in
its position for use, this may be effected in the following manner-On
the hoop E a ring R is fitted, and kept or by a small stud shewn at S,
Figure 16 and 18; on this are three bent studs T, T, T, Figures 16, 17, and 18.
When the glass is passed over the springs into its position, the ring R carrying
the studs T, T, T, is moved (until they are stopped by the radial bars, as
shewn in Figure 18), and when there they prevent the spring wholly or
partially from retracting; or the studs T, T, T, may be made to push forward
moveable arms, bars, or levers, which are shewn jointed at U, U, U, Figure
16, and the tips of which are angularly bent, as shewn at G, Figure 18. The
retraction of the spring, when the glass chimney is in use, may, if desired, be
effected in the glass holder, Figure 3, in the manner shewn in the plan, Figure
19, where a moving ring or plate V is connected to the under side of the rim
D, D, by three screws W, W, W, screwed into the rim D, D, and the heads
of which, projecting beneath V, form three bearings or supports for it, and keep
it connected with but moveable beneath the rim D, D, as shewn in Figure
3 and 19. From the ring V are three short hooks X, X, X, projecting
inwardly, and which are carried by the movement of the circular ring V over
the ends of the springs G, G, G, Figure 3, and would prevent their contract-
ing far enough to let the glass be forced off until the ring is again turned in
he opposite direction, the end of the springs G, G, G, being prolonged below
the rim D, D, in order to meet the hooks, and the hook being stopped from
going too far by the radial bars L, L, L. Though the modes of holding the

page_text: glass chimnies before described will be found chiefly applicable to Argand gas
burners, they may be used with all gas burners where a glass chimney is
employed; and I consider that a glass chimney constructed with the lower end
bent inwards for the purpose of forming a hold or attachment, and the applica-
tion thereof to gas burners, are novel Inventions, and I claim the same accord-
ingly. And I do not mean or intend to restrict myself to the several modes of
fastening herein-before specifically described; but I declare that I shall avail
myself of any other modes of fastening whereby glass chimnies may be fixed to
gas burners through the means of an edge or border turned inwards, as before
described, and I shall consider all such modes of fastening glass chimnies as
coming within the principle of my Invention. Neither do I mean or intend to
confine myself to the use of any particular material or materials in the
construction of the said glass holders, but to use whatever materials are
suitable or preferable for the purpose.
In witness whereof, I, the said Hugh Ford Bacon, have hereunto set
my hand and seal, this Tenth day of May, in the year of our Lord
One thousand eight hundred and thirty-nine.
HUGH FORD BACON. (L.S.)
AND BE IT REMEMBERED, that on the same Tenth day of May,
in the year above mentioned, the aforesaid Hugh Ford Bacon came before our
Lady the Queen in Her Chancery, and acknowledged the Specification afore-
said, and all and every thing therein contained, in form above written.
And also the Specification aforesaid was stamped according to the tenor of
the Statute in that case made and provided.