Improvements in Roof Oil Lamps.
Year: 1894

page_text: Date of Application, 21st Nov., 1894
Complete Specification Left, 21st Aug., 1895-Accepted, 21st Sept., 1895
Improvements in Roof Oil Lamps.
We, THE LAMP MANUFACTURING Co. LD. of 12 and 14 Leonard Street
City Road, in the City of London, and WILLIAM HENRY ISAAC WELCH
of 68 Coborn Road, Bow, in the County of Middlesex, Lamp Maker, do hereby
declare the nature of this invention to be as follows:-
Our invention relates to roof oil lamps of the kind described in the Specification
No. 18310 of 1890. We employ as before two inclined burners but we enclose
each of them in a separate glass chimney.
The air for combustion passes through suitable wind-guards to a central air
passage, between the 'glass chimneys, and down into a chamber from which each
burner is supplied' with 'air.
The burner cones are hinged to the air chamber so that they can be opened to
give access for trimming the wicks and cleaning.
The oil reservoir, to which the air chamber, the burners and their cones are
attached hangs below them, and can be detached along with them from the upper
part of the lamp.
From the central air passage and forming part of it, hangs a conical body which
supports the chimneys in position, and has at its lower part a circular rim 'fitting
into the upper part of the oil reservoir, to which the conical body is secured by a
vertical rod passing through the oil reservoir and air passage.
Upon the top of the rod is a cross bar forming a T which, when the rod is
pressed up passes through a slot in a bridge above; and upon the rod being turned
partly round, locks itself across the bridge.
In order to regulate the wick without removing the reservoir two holes are made
in the side of the conical body, through which a key can be inserted to turn the
wick pinions. Inside the conical body is a loaded hinged door which opens when
the key is inserted and closes the key holes automatically when the key is
withdrawn.
The products of combustion pass through two chimneys to the upper part of the
lamp, and issue by shielded outlets.
In the upper part of the lamp 'there is a hinged 'cover which can by a lever be
made to nearly close the outlet and thus the flames are made less without having to
regulate the wicks, but, in order to prevent extinction of the flames, we provide a
hole through the hinged cover. In order to keep the lamp cool we perforate the
outer casing with a number of holes, allowing air to pass around the chimneys and
central air passage.
The flames are supplied with air entering the upper part of the casing through
shielded orifices and descending the central tube between the burners to the bases
of the air cones.
Dated this 21st day of November 1894.
ABEL & IMRAY,
Agents for the Applicants.

page_text: Improvements in Roof Oil Lamps.
We, THE LAMP MANUFACTURING Co. LD. of 12 and 14 Leonard Street,.
City Road, in the County of London, and WILLIAM HENRY ISAAC WELCH,
of 68 Coborn Road, Bow, in the County of Middlesex, Lamp Maker, 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 :-
This invention relates to an oil lamp such as can be used on the roof of a railway
carriage or other roof, this lamp being constructed as we shall describe referring to
the accompanying drawings.
Fig. 1 is a vertical section shewing one of the burners and part of the oil
reservoir in elevation.
The
Fig. 2 is a section of the lower part which carries the burners on a plane at right
angles to that of the section in Fig. 1, the oil reservoir being shewn in elevation.
The oil reservoir A has through it a tube a which is continued above the
reservoir as a tube a¹ of smaller diameter. The tube a encloses a rod B and a
helical spring which is situated between the shoulder of a a' and a collar near the
lower end of the rod B so as always to urge the rod downwards. The lower end
of the rod is squared at 6 to receive a key which can be inserted through a hole of
an annular plug a² screwed into the tube a. The upper end of the rod B has fixed
to it a crosshead b¹ forming with it a T head, and on the rod B there is a projecting
pin engaging in a slot in the upper end of the tube a'. A central air tube
widens out at its base so as to present two inclined faces covered with perforated
metal c; through each of these faces passes an inclined wick tube c' and on each
face rests an air cone D which is hinged at d so that when the lower part of the
lamp is open, the cone can be turned aside on its hinge to give access for trimming
the wick and cleaning. The air tube C with its base carrying the wick tubes and
air cones is permanently attached to the top of the reservoir, and the upper part of
the air tube fits the cylindrical bore of a body E having a conically outspreading
base terminating in a lipe which fits within a flange or lip of the reservoir.
body E has at its top a bridge F through which there is a slotted hole long enough
but not wide enough to allow the T head b' to pass through it. In the slope of
the conical base of E on each side is formed a socket to receive the lower end of a
glass G, the upper end of which enters the base of a chimney g. To the upper
part of E is attached a tube e¹ through the perforated cover e² of which air can
enter from a compartment H, this air entering by shielded holes through the
external casing K. The two chimneys g g open into an upper compartment L
which communicates with H through a central hole l. Over the compartment L
there is a cover M hinged to the casing at m and secured by an opposite catch m¹.
The cover has an outlet compartment N with an internal cone n to shield the outlet
holes, and this compartment N is separated from L by a hinged flap P having
through it a hole p allowing outlet for sufficient air to keep very small flames just
alight. The pin of the hinge of P extends through the cover and has an external
arm loaded with a weight sufficient to keep the flap P open when it is opened by
depressing pl, but not enough to open P when p' is raised. Through one side of E
there are two holes T through which a key can be inserted to turn either of two
pinions which are geared through intermediate pinions to the axes of the
pinions which are engaged with the wicks. A loaded hinged flap t closes the
openings T when the key is removed.
When it is desired to get access to the wicks, a key is inserted through the hole
of a² and engaged with the squared ends of the rod B which can then be pushed up
so as to disengage the pin 2, whereupon the rod B is turned one quarter round, so

page_text: that its head 6' can pass through the slot of the bridge piece F. The reservoir A
with central air tube C and the wicks and cones can then be withdrawn leaving the
glasses G chimneys g and casing K all left in position. The course of the air to
supply the flame and of the products of combustion are indicated by arrows.
Roof lamps have already been used in which there are two inclined wicks and air
cones and chimney tubes g, but these having no glasses G enclosing the flames,
necessarily have a glass basin under the reservoir connected to the casing K above.
By employing separate glasses G we are enabled to dispense with the glass basin
below and we thus get free access to the working parts of the lamp, while the
reservoir is freely exposed and kept cool.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim is:
1. In a roof oil lamp the combination of the oil reservoir, the central air tube
with spreading base wick tubes and cones fixed on the reservoir, and the body with
conical base carrying the glasses, substantially as described.
2. In a roof oil lamp, in combination with the oil reservoir, the central air tube
with spreading base wick tubes and cones fixed on the reservoir, and the body with
conical base carrying the glasses, the central rod with T head, pin and spring and
bridge therefor, substantially as described.
3. In a roof oil lamp, in combination with the pinions for raising and lowering
the wicks, and the holes for insertion of the key, the loaded flap door automatically
closing the said holes.
4. In a roof oil lamp, in combination with the casing a cover hinged thereto and
within the cover a hinged flap with hole through it and external loaded arm
substantially as and for the purpose set forth.
Dated this 21st day of August 1895.
ABEL & IMRAY,
Agents for the Applicants.