Year: 1897

page_text: Date of Application, 24th Nov., 1897
Complete Specification Left, 24th Aug., 1898-Accepted, 5th Nov.,
1898
I, HENRY SALSBURY, of 125 and 126, Long Acre, County of London, Lamp
Manufacturer, do hereby declare the nature of this invention to be as follows:―
This invention relates more particularly to those oil lamps known as tail lamps
which are dropped through a hole in the rear footboard cover of an omnibus for
throwing the light into the vehicle, but such lamps may be employed for other
or similar purposes as desired.
For the purpose of my said invention, I form an external and an internal casing
as the body, the internal one being of less depth than the outer and has a
bottom plate, to rest upon the oil well or tank when dropped in from the top,
a space being left between the two casings in order that air may flow downward
and be rarefied by the internal heat conducted through the shell of the inuer
casing before it passes under said bottom plate to the burner over which said
bottom plate has its bearing, said plate being recessed at the back for the burner
neck to slide into when the oil tank is inserted.
The lower part of the inner casing is enamelled as a reflector, or such reflector
plates may be rivetted to the inner casing and be set at angles from two of the
sides and the back within a part of the latter of which a lens in colour can be
inserted.
The upper reflector plate has a hole in it for the escape of the products of com-
bustion, it not being necessary to employ a glass chimney, the air supply being
so arranged that the flame gives a strong light without Hickering, which is one
of the advantages possessed by my construction of lamp.
The air enters the space from the dome or weather shields below the level from
which the vapour of the products of combustion escape, and this in the case of
a closed vehicle or building serves to ventilate the structure and draws away the
vitiated air.
Instead of the air being free to enter the space for rarefication, it can be con-
ducted downwardly by tubes (one or more), and when desired a shield can be
fitted to or dropped on to the burner for the air to flow under and so become
associated with the flame, such as through perforations of the burner cap.
The outer casing of the lamp has a sliding or other shutter, and since there
are no vent holes at the bottom of the casing, it serves as a receptacle for overflow,
should such happen, and as is often the case from the jolting of a vehicle while
travelling.
Dated this 24th day of November 1897
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said Henry Salsbury.

page_text: Improvements connected with Oil Lamp Casings,
I, HENRY SALSBURY, of 125 and 126, Long Acre, County of London, Lamp
Manufacturer, 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 more particularly to those oil lamps known as tail lamps
which are dropped through a hole in the rear footboard cover of an omnibus for
throwing the light into the vehicle, but such lamps may be employed for other
or similar purposes as desired.
For the purpose of my said invention, 1 form an external and an internal casing
as the body, the internal one being of less depth than the outer and provided with a
bottom plate to rest upon the oil well or tank when dropped in from the top,
a space being left between the two casings in order that air may flow downward
and he rarefied by the internal heat conducted through the shell of the inner
casing before it passes under said bottom plate to the burner over which said
bottom plate has its bearing, said plate being recessed at the back for the burner
neck to slide into when the oil tank is inserted.
The lower part of the inner casing is enamelled as a reflector, or such reflector
plates may be rivetted to the inner casing and be set at angles from two of the
sides and the back within a part of the latter of which a lens in colour can be
inserted.
The upper reflector plate has a hole in it for the escape of the products of com-
bustion, it not being necessary to employ a glass chimney, the air supply being
so arranged that the flame gives a strong light without Hickering, which is one
of the advantages possessed by my construction of lamp.
The air enters the space from the dome or weather shields below the level from
which the vapour of the products of combustion escape, and this in the case of
a closed vehicle or building serves to ventilate the structure and draws away the
vitiated air.
Instead of the air being free to enter the space for rarefication, it can be con-
ducted downwardly by tubes (one or more) and when desired a shield can be
fitted to or dropped on to the burner for the air to flow under and so become
associated with the flame, such as through perforations of the burner cap.
The outer casing of the lamp has a sliding or other shutter, and since there
are no vent holes at the bottom of the casing, it serves as a receptacle for overflow,
should such happen, and as is often the case from the jolting of a vehicle while
travelling.
My invention is clearly shown on the annexed drawings and in which all letters
of reference apply to corresponding parts.
In Sheet 1, Figure 1 sectional elevation. Figure 2 transverse section. Figure 3
plan section through the line a, r, of Figure 1.
Figure 4 plan section through line,, of Figure 2 in both of which figures
the base plate has a hole only the plate on the burner being dispensed with.
A, is the internal casing or inner shell with a base B3 to rest upon an intermediate
plate C, or it may be upon a ring or other support on or above the burner E of
the oil well F but independent of same, so that said inner casing A can he removed
through the upper part when the top G of the outer casing is raised for that
purpose such as on the hinge joint H, said top G being otherwise securable by
the spring catch I when the top G is folded down, as indicated at Figure 1,
where the neck J abuts against a flange K to hermetically close the passage, so

page_text: that air from the entry L shall pass over the top of the inner casing and down
between the two casings A, D, to feed the flame of the lamp with the air that
has become rarefied in its downflow in the space M at the lower part of which
it passes under the base plate B of the inner casing and of the intermediate
plate C into a chamber P between the oil well F and the intermediate plate C
and under the dome E to feed the flame which as shown is within the lower
pocket R of the inner casing A where the sides and top angled reflector plates S, S,
form the partition for separating the fumes chamber T from the flame chamber R.
The heat and products of combustion from the flame of the flat kind passes
upwardly through the aperture U of the top reflector plate S and these may
circulate in the fumes chamber T and relieve the usual updraught of a chimney,
but a chimney may be fitted on the top reflector plate, if desired.
The fumes from the flame on leaving the chamber T escape by the tubular
part V and away by the outlet W, the fresh air for feeding the flame entering
the lamp casing under the screen or weathering X by the inlet L, this being at a
lower level than the outlet W as not to be affected by the escaping and uprising
fumes.
The air chamber M may be an open space between the two casings, as at Figure 1,
in the end or ends of the broader side of the outer casing, but tubes may be fitted
between a top flange plate and of the intermediate plate C or a base plate B to
serve as air passage to prevent air passing to the burner except from under and
within the dome.
If the dome becomes from any cause overcharged with air, an escape into the
flame chamber by the aperture is provided.
The door is preferably at the back, and of the uprising kind, as indicated at
Figure 2, to rise in end grooves of the outer casing, but it may be hinged to fold
upwardly, if desired.
To prevent sweating of the front glass Z, I form a series of holes a in the top
angled reflector S for escape of vitiated air to the fumes chamber T.
The air space or spaces M or the tubes respectively occupy the positions shown.
The door, sliding or other, has preferably a coloured glass disc in it, and in
cases of public vehicles starting from one point and travelling over different routes,
the colours would make respective vehicles known.
On Sheet 2 of the annexed drawings, I show a lamp in which a single air down-
flow passage M in the body D is provided, the rarefied air passing from this tube
or chamber M under a plate C forming part of the burner oil well or tank
before it can reach the flame. This lamp has the air tube portion set off at an
angle to form as large a heating chamber as is possible, such angled side forming
part of the reflector S from the body D in conjunction with other side and back
reflector plates S. S. for straight head reflection of light, the light chamber R
having a sunken kind of dome reflector S for throwing the light downwardly.
The downcast dome may and preferably has the smoke funnel c standing up
from it, and the lid G can be apportioned off by a false screen d, so that the supply
of air first passes between the lid G and screen d before entering the downflow
space M. This is a rapid way of heating the supply of air previous to feeding
the flame, because the greatest heat is naturally at the top plate of the lamp, the
lid G with its heating space e and screen d as a separate article readily affixable
to the body tending to render the interior more accessible for cleansing and other
purposes, the top reflector S being simply dropped in from above. This may be
part of the air conveyor chamber or inner casing if so desired.
According to the first sheet of drawings, the lamp or oil well F is pushed in
from the back, and the air partition plate C is forced by the springs f. f, up into
contact with the base B.
Figure 1, Sheet 2 is plan through the line r, 7, of Figure 2 which is a sectional
elevation through the line y, y, of Figure 1.
Figure 3 perspective elevation of a lamp with the lid partly open to show
the screen and its end gap by which the chamber M is fed.

page_text: Figure 4 plan of burner with intermediate plate C, its end being cut at an
angle to correspond or nearly so to the shape of the down chamber M.
Figure 5 is an end view of the burner showing the passage between the oil tank
and the intermediate plate for the flow of rarefied air to the burner.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed I declare that what I claim is:
1. Making an omnibus or like vehicle roof lamp with an inner and outer casing,
the inner casing having augled or curved sides to form air shafts for supplying
air to support combustion when dropped into the outer casing and its base resting
on the burner dome, as set forth.
2. In an omnibus or like vehicle roof lamp, providing a slot in the base plate
of the inner casing to enable the oil tank to be withdrawn from the back without
lifting the inner casing, the said slot being covered by a plate fixed to the burner
dome substantially as set forth.
3. In an omnibus or like vehicle roof lamp, fixing or attaching to a removable
oil tank Fa shield or plate C to form a chamber between such plate and tank,
so that when in position air only enters the chamber from a tube or shaft, such
as M, to support combustion of the flame, substantially as described and as shown
on Sheet 2 of the drawings.