Year: 1887

page_text: Date of Application, 31st May, 1887
Specification Accepted, 12th Aug., 1887
[Communicated from abroad by EMANUEL STEIN, of the Corner of Twenty-first
Street and Washington Avenue, Philadelphia, in the County of Philadelphia
and State of Pennsylvania, United States of America, Manufacturer.]
I, PHILIP MIDDLETON JUSTICE, of 55 and 56, Chancery Lane, in the County of
Middlesex, Fellow of the Institute of Patent Agents, do hereby declare the nature of
this invention, and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement:-
The invention relates to that class of lamps wherein the heat of the products of
combustion from the flame is imparted to the air supply and to the combustible gas
for increasing the illuminating power of the flame, and the nature thereof consists in
certain improvements in the construction of burners of such lamps whereby a better
combustion of the gas is obtained, the number of parts of which the burner is composed
lessened, and the cleaning of the gas passages facilitated.
In lamps of this class as heretofore constructed, the burner which is screwed into
the lower end of the gas chamber, consists of a tube plate. provided with a large
number of holes for holding together the gas tubes, a series of tubes, each of which
are passed through the holes in the tube plate, a ring to which the lower ends of the
017

page_text: tubes are secured, and a stem supporting a deflecting button which is screwed into
the tube plate. According to the present invention all these parts are constructed of
one and the same piece of metal by first turning a casting to the required form, then
drilling through same, holes for the passage of gas and finally cutting or milling air
spaces between the holes or bores. One of the objects of the present improvement is
also to make the flame plate, and perforated washer of the burner, of one solid piece
of metal for the purpose of reducing the cost of manufacture, and obviating the
destructive effects of expansion and contraction arising from the extremes of heat and
cold to which the parts are subjected.
In the accompanying drawings
Figure 1 is a vertical section of a regenerative lamp having the improvements
applied thereto, and
Figures 2, 3, 4, 5, 6 and 7 are enlarged views of the burner.
In constructing the burner the casting is first turned in such a manner as to assume
the form shown by the outer bounding lines of Figure 2 when the deflecting button
is removed, and threads upon the periphery and upon the lower part of the rod E
being cut in this operation. The requisite holes C, in this instance twenty eight in
number, are then drilled and the requisite number of slots d, in this instance twenty
eight, are afterwards milled between the holes or bores C, from the annular rim D to
the shoulder B, and also above the shoulder B to the top of the cylinder. The button F
is then fastened upon the stem and the burner is completed in two parts instead of the
many which have been heretofore required. In the burner illustrated in Figures 4
and 5 the tube cylinder instead of extending above the plate or shoulder B is provided
with an inner annular beveled edge C immediately under which is the recess or
cup G, constructed in the form of an inverted cone and provided with a downwardly
projecting tubular stem E¹, the bore of which is closed by the button F¹.
As the tubes C are cleaned by means of a wire driven through them, which forces
the carbon deposits upward, the beveled surface ( prevents the accumulation of the
carbon residue and causes it to fall into the recess G, below, from which it may be
readily removed by unscrewing or removing the button F' from the hollow stem E¹.
The lower annular terminal of the burner D is provided with small grooves H, best
shown in Figures 5, which compel the air flowing towards the flame to reach the gas at
a point very near its exit from the burner, and thereby greatly facilitates its combustion.
In Figure 6 a shield J is shown for protecting the lower annular terminal of the
burner.
This shield is of an annular form and is provided on its outer and inner edges with
ring shaped flanges, which fit about the terminal annulus of the burner and protect
it from the oxydizing effect of the hot gases. As the shield is removable it may be
readily replaced when it is worn out.
The deflector plate P, which may be provided with a reflecting surface, constitutes
the lower wall of what I term the outer regenerator, from which heated air is supplied
to the outer surface of the flame. This deflector plate when secured to the top plate T,
of the lamp, forms an annular air heating chamber I, into which the outer air flows
through perforations T₁, in the top plate. The inner part of the deflector plate has
the form of a conical frustrum, the upper edge of which fits closely against the bottom
of the top plate or within an annular flange formed in the top plate for its reception,
but the annular flange forming the outer edge of the deflector plate does not touch
the top plate, it being so arranged that a space is left to form an annular passage
through which the air flows from the chamber I, downward into the globe.
width of the passage may be accurately adjusted by the screws, by means of which the
deflector plate is secured against the washers projecting from the top plate.
The
The inner regenerator R, in which the air is heated which flows down the central
air supply passage, is provided with what 1 term the cone top C³, which has a
cylindrical pendant top C, overhanging the top plate T, but not touching it, and so
arranged as to form an annular chamber N, surrounding the regenerator.
regenerator is provided with a number of radial passages connecting the annular
chamber N,-with. the central air supply. flues M, R, A, the walls of which form the
The

page_text: passages H³, through which the escaping products of combustion flow to the chimney O
having previously passed through opening P.
The cone top C³ rests upon the circular rin of the top of the regenerator R, so as
to separate the currents of inflowing air from the products of combustion which are
deflected by the conical surface over the regenerator passages against the gas pipe,
and is pressed firmly down upon the regenerator by the cylinder L, which forms the
casing of the chimney. This cylinder is held in position by the clamping piece W,
which is fitted to the gas pipe by means of nut and screw or in any desired manner.
The various parts of which the lamp is composed may be readily assembled together
or separated from each other.
The globe is provided with an outer annular flange which rests upon a corresponding
inner flange on the globe holder S. The globe holder is hinged to the bottom of the
top plate and secured in position by a turn clamp. The regenerator rests within an
annular groove cut for its reception in the inner edge of the top cylinder which forms
a part of the top plate, and is secured thereto by screws.
A beveled ring cut upon
the inside of the cone top rests upon a corresponding beveled edge formed upon the
top of the regenerator and the latter is secured upon the former by the cylinder L,
and clamping piece W.
The sheet metal cylinder A may be surrounded by a ring of asbestos, or other non
conducting material.
The said sheet metal cylinder, which in some instances is surrounded by a sheathing
of asbestos, has its lower end turned outward in such a manner as to form an annular
flange a, which supports the outer edge of the washer B¹. The part of the washer B¹
extending from the outer edge of the perforations b to the outer edge of the flange a,
takes the place of the separate flame plate which has heretofore been used, and thus
the perforated washer which has been heretofore placed in the air passage between
the burner tubes and the cylinder surrounding them, and the flame plate is formed
of one and the same piece of metal.
The plate B fits loosely around the burner, and is fastened to the cylinder A,
which is fitted to the lower flange of the regenerator, and is held in place by means
of three pins, projecting from the flange thereof, and corresponding to the three
openings f, formed in the upper part of the cylinder A as shown in Figure 8. By
means of this construction the hot air coming from the regenerator is lead downward
to the gas flame, partly through the perforations and partly through the slits in the
burner and lower part of said burner, above the deflector button.
Having now particularly described and ascertained the nature of iny said invention
and in what manner the same is to be performed, I declare that what I claim is,
1. In a regenerative gas burner, the combination with the burner tubes and
cylinder surrounding them, of a flame plate and perforated washer formed of a single
piece of metal, as and for the purpose described.
2. The combination of the cylinder A provided with an annular flange a, and the
metal plate B', provided with perforations 6 and the flame plate upon its outer edge,
as and for the purpose described.
3. A gas burner composed of single piece of metal, having drilled holes for the
passage of gas, and the spaces between the holes cut or milled out, for the passage of
air, as and for the purpose described.
4. A gas burner composed of a single piece of metal having drilled holes for the
passage of gas, the spaces between the holes cut or milled out for the passage of air
and a projecting steni for the supporting of a deflecting button, as and for the purpose
described.
5. In combination with a gas burner a central receptacle or chamber for reception
of impurities, having a removable button, as and for the purpose described.
6. In combination with a gas burner, a central chamber or receptacle commu-
nicating with a gas passage, having its upper edge beveled at the entrance of the gas
passages and a tubular extension provided with a removable deflecting button, as and
for the purpose described.

page_text: 7. In combination with a gas burner an annular shield fitting upon the terminal or
flame end of the burner, as and for the purpose described.
8. In regenerative lamps a pendant air casing having a surrounding sheathing of
asbestos, in combination with an annular chamber surrounding the lower end of the
escape flue, provided with an air inlet communicating with the outer air, and an air 5
inlet located within the globe.