Improvements in Lamps or Lanterns for Lighting Streets and other Localities by Gas or other Luminant Agent.
Year: 1890

page_text: Date of Application, 22nd Jan., 1890-Accepted, 3rd May, 1890
COMPLETE SPECIFICATION.
Improvements in Lamps or Lanterns for Lighting Streets and other
Localities by Gas or other Luminant Agent.
I, CHARLES HUELSER of the firm of Huelser & Co. of 142 Fleet Street, London,
Solicitors of Patents, do hereby declare the nature of this invention, a communi-
cation to me from abroad by Wilhelm Ritter, of Cologne on the Rhine in the
Empire of Germany, Engineer, and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement:—
This invention relates to the means for lighting streets and other places by gas
or other luminant agents and has for its purpose to obviate the principal drawbacks
inherent to the lamps or lanterns hitherto generally employed for the said purpose,
which owing to their construction and the material used therein require frequent
and expensive repairs, particularly involving considerable expenditure through
breakage of glass and give on the whole unsatisfactory luminant results when
compared to the "Intensive lanterns."
The improved lantern is made throughout from a material which is subject to
but minimal wear and tear viz. chiefly zinked cast iron and zinkel sheet iron.
Owing to the application of a strong conic glass mantle a of about 5 millimetres
in thickness consisting of one piece and an enamelled reflector 6 under the top or
roof of the lantern e the luminous effect, even when using the common or fish-tail
burner, by far surpasses that usually obtained with ordinary street lamps. Moreover
the improved lantern excels all systems of this description, heretofore known, by the
essential advantage of having a perfectly steady (i.e. stormi proof) flame and being
alinost completely shadowless.
The improvements in their essential details, are embodied in the following
description, reference being had to the accompanying drawing, in which
Fig. 1 is an elevational view and partial section, and
Figs. 2 to 5 represent details of a lantern having the improvements applied
thereto.
The perforated or broken-through cast iron hox d Fig. 1 connected by copper rivets
or otherwise with the sheet iron dome or roof e and serving for the escape of the
gases of combustion is closed at the top by means of a sheet iron cap c, held in
position by aid of a screw, passing from the knob provided at the top of the cap
down through a wrought-iron stay g.
The box & referred to contains, cast thereto, three pins, serving as supports for the
white enamelled reflector b which is placed on said pins by means of bayonet closings h
as shown by Fig. 2, so as to be easily removable by hand.
The reflector consists of two parts, the upper cylindric and zinked 1, and the lower
conic enamelled part 6 and, being protected from direct climatic influences or moisture
by groove which at the same time carries the reflector proper, is very durable.
The dome or roof e, the underside of which is lined by the reflector 6 is connected
to the upper cast metal ring or tyre i for receiving the glass mantle, by means of a
binge k, from which is suspended the safety bar Fig. 3, provided in the rear of the
lantern and destined to obviate any falling down of the upper portion thereof in the
event of the glass mantle being smashed by force.
The atmospheric air enters through apertures of dome d, descends between e and b
and reaches the flame in a preliminarily heated state, subsequently escaping with the
products of combustion through slots in roof c.
The mantle is secured by means of gypsum or other suitable substance in the upper
and lower receiving ring or tyre it, the surface of such binding agent being, when
dry, coated with linseed oil varnish or equivalent material, to increase its durability.
The lower tyre Fig. 4, contains two exactly equal frames m m³ of tempered cast

page_text: iron with plates or-disks of flint glass secured by means of two clamping screws and
two pins pp cast on, Fig. 5.
The front bottom plate m, which is lifted when lighting or extinguishing the lamp
is connected through the clamping screw o with the flange of the tyre, while the rear
plate is held by cast projections or pins, from which it can be lifted out when cleaning
the lantern. The latter is secured by aid of two screws on the cast iron fork or
holder 9: which is fixed to the lamp post or bracket likewise by means of screws.
Lead plates are inserted respectively between the lantern and fork and between the
laiter and the lamp post or bracket for the purpose of ensuring a vertical position and
obviating any shaking of the lantern.
Having now particularly described and ascertained the nature of this inven
tion and in what manner the same is to be performed, I declare that what I
claim is :
1) A lantern for lighting streets or other places by gas or other means, made of
more durable material than lanterns hitherto employed for this purpose, said lantern
having, in order to admit of an easy exchange of the enamelled plate, a reflector
which consists of two parts 6 and band is secured to the upper portion of the lantern
in the manner referred to in the foregoing specification, the whole substantially as
and for the purpose set forth.
2) In lanterns for lighting streets and other places by gas or other luminant agent,
the application of a conic glass mantle a made of one piece, whereby any lateral bars
are dispensed with and consequently a thorough utilization of the luminous agent and
a steady, storm proof and almost shadowless flame are attained, substantially as set
forth.
3) In lanterns forming the subject of claims 1) and 2) the application, in the roof
or dome, of a reflector, placed in such a position as to cause, on the one haud the
enamelled part thereof to be protected from direct climatic influences and any
penetrating water to be retained and evaporated in the groove 6 of the cylindric
portion, on the other hand the direct passage, to the flame, of cold air through the
apertures of the roof to be obviated, the cold air admitted being compelled to pass
through between the roof e and dome d and the shade 6 61, and consequently coming
in a preliminarily heated condition in contact with the flame, thereby supporting
combustion and increasing the luminant power, whilst the gaseous products of com-
bustion pass through the cylindric portion 6' of the reflector and escape below the flap
of the roof c, substantially as set forth.
4) In lanterns forming the subject of claims 1) and 2) the application of a safety
bar and bottom plate fastening device arranged substantially as and for the purpose
set forth.
Dated this 20th of January 1890.
HUELSER & Co.,
142, Fleet Street, London, Attorneys.