An Improved Adjustable Lime-light Burner for Magic Lanterns and similar purposes.
Year: 1893

page_text: Date of Application, 20th Sept., 1893
Complete Specification Left, 20th June, 1894-Accepted, 21st July, 1894
PROVISIONAL SPECIFICATION.
An Improved Adjustable Lime-light Burner for Magic Lanterns and
similar purposes.
We, ALFRED CHARLES JACKSON of 82 Farleigh Road, Stoke Newington,
London, Optical Instrument Maker, and HENRY LUSCOMBE TOм8 of 78 Queen
Victoria Street, London, Optical Lantern Manufacturer, do hereby declare the
nature of this invention to be as follows
Our improvements refer to the mechanical arrangements for holding and adjusting
the lime, and to the shape of the lime block.
We construct the lime holder, which is a flat metal box, in two parts and connect
these at the back by a short plate with a slot working over a pin, and a nut to
fasten same.
On the inner edge of the rim of the holder we form a projecting lip
or bead, and we form the lime blocks with a groove to receive said lip. Behind
the holder is a socket to receive the end of the rod by which it is slowly rotated as
the lime is consumed. As this rod lies at an angle from the holder, we insert in it
a modified gimball joint which allows the rotating motion to be communicated from
any convenient position behind the holder. The short end of the rod after leaving
the gimball joint passes through a vertical fork, and is furnished with a fixed disc,
and a moveable disc-nut running on a thread cut on said rod, and so arranged that
by screwing up the disc-nut, the holder can be fixed at any desired height on the
said vertical fork. When preferred we adjust the height of the lime holder on the
vertical fork, by making the disc-nut and disc in one, with a short bar between
them, so as to form a sliding guide which rises and falls freely on the said fork.
From this guide there hangs a plate which rests on an inclined plane attached to a
wire rod, so that it can be drawn forward or pressed backward, and will thus elevate
or lower the lime holder.
It is an especial feature of our improved burner that it can be easily detached
from the rod when the block of lime is renewed. This is effected by means of a.
dove-tail joint attachment, or in some other suitable way.
Dated this 20th day of September 1893.
S. S. BROMHEAD,
97, Newgate Street, London, E.C., Agent for Applicants.
COMPLETE SPECIFICATION.
An Improved Adjustable Lime-light Burner for Magic Lanterns and
similar purposes.
We, Alfred CHARLES JACKSON of 82 Farleigh Road, Stoke Newington,
London, Optical Instrument Maker, and HENRY LUSCOMBE TOMS of 78 Queen
Victoria Street, London, Optical Lantern 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 to lime-light burners in which lime is rendered incandescent
by the flame of oxyhydrogen gas or some other means as used for displaying
pictures on a sheet or screen and for like purposes.
Our improvements refer to the mechanical arrangements for holding and adjusting
the lime, and to the shape of the lime block.

page_text: P
We construct the lime holder which is a flat metal box or cup, preferably round
in section, in two halves or parts and we connect these at the back by a short plate
furnished with a slot working over a set screw and a nut to fasten same. On the
inner edge of the rim of the cup or holder we form a projecting lip or bead, and
we form the lime blocks with a groove to engage with and receive said, lip..
Behind the holder is a socket to receive the end of the rod by which it is slowly
rotated as the lime is consumed. As this rod lies at an angle from the holder
we insert in it a modified gimball or universal joint which allows the rotating
motion to be communicated from any convenient position behind the holder.
The short end of the rod after leaving the gimball joint passes through a small
sliding crosshead which moves up and down a slot formed in a vertical standard.
When preferred we adjust the height of the lime holder on the vertical fork or
standard, by means of a disc-nut and disc in one with a short bar between thein,
forming a sliding guide or small cross-head which rises and falls freely on the
said fork.
From this guide there depends a plate or small rod which rests on an inclined
plane attached to another rod or handle so that it can be drawn forward or pressed
backward and will thus elevate or lower the lime holder.
It is a feature of our improved burner that it can be easily detached from the
rod when the block of lime is renewed.
This is effected by means of a dove-tail joint attachment or in some other suitable
way.
We will now describe the invention with reference to the accompanying drawings,
in which,
Fig. 1 shows a side view of our improved lime-light burner.
Fig. 2 shows an end view of Fig. 1.
Fig. 3 shows a detached front view of the adjustable box or lime holder c.
Fig. 4 shows a back view of Fig. 3 sectioned on line 1-2 of Fig. 1, and
Fig. 5, a view in perspective on a smaller scale of the lime block j, showing
groove for engaging with lip or bead i.
α, is the upright standard supporting the lime holder c.
lean slightly towards the flame.
a', is the broad foot on which a, is erected.
This is arranged to
b, is a small sliding crosshead sliding up and down the standard a, in the open
ended slot a².
1
b, is a small rod depending from the crosshead b, the lower end of which engages
with an adjustable wedge piece d.
6, is a small guide ring to keep rod 6', in place.
C,
an adjustable split cup or lime holder.
On the back of this cup is secured a slotted piece e, with slot e', which engages
with a screw f.
.0
This method of constructing holder c, allows the bead i, to engage with the
groove in the lime block j.
d, is a wedge shaped piece, passing through slot a³ and connected to the rod d',
which raises or lowers the cup c, as required, by engaging with the lower end of the
tail piece of the crosshead b.
e, is a small cross plate secured on the back of the lime holder c, in one end of
which a slot e' is formed for fixing the adjustable half of the bolder c, and adjusting
it to the lime block.
"
f, is a set screw working in slot e', to fasten the split lime holder c when the lime
is inserted.
9,
is a small rod which turns the holder e as required.
[
h, is a gimball or universal joint on the spindle y, to enable the rod to be worked
from an angle.
i, is a lip or bead formed on the rim of the holder c, which engages with a
corresponding groove in the block of lime.
<

page_text: The mode of use is as follows :-
The prepared block of lime being inserted in the adjustable holder and firmly
fastened therein by means of the lip and slotted plate at back of said holder, the
flame is caused to impinge upon it in the usual way.
As the lime is consumed, the operator rotates it by turning the gimballed rod g,
which rotates the lime holder c, and ensures a regular and economical consumption.
of the block shown in Fig. 1.
When the face of the block is consumed it can be taken out and reversed, by
which means it will be caused to last much longer in use.
If it is required to raise the holder the rod of the wedge d¹, should be drawn
towards the operator and conversely if it is desired to lower it, the wedge is thrust.
away from him.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that we
claim is :-
1. In a lime light burner a split box or cup forming a lime holder composed of
two adjustable parts, said parts having an interior lip or flange and an external slot
and set screw for adjustment and specially formed blocks of lime to fit the said
holder; said blocks having a groove or recess to engage with the said flange or
lip as herein described and set forth.
2. In a lime-light burner, a rod for turning the lime holder furnished with a
universal joint and removable attachment as herein described and set forth.
3. In a lime light burner a rod terminating in a wedge-shaped or tapering block
by means of which the lime holder can be readily raised or lowered as herein
described and set forth.
4. In a lime-light burner the combination of the foregoing improvements with
the slotted standard a, and moveable crosshead with its vertical tail b', as herein
described and set forth.
Dated this 20th day of Tune 1901
S. S. BROMHEAD,
97, Newgate Street, E.C., Agent for Applicants.