IMPROVEMENTS IN MAGIO LANTERNS AND LIME LIGHT APPARATUS
Year: 1886

page_text: Date of Application, 6th May, 1886.
Complete Left, 4th Mar., 1887.
Complete Accepted, 5th Apr., 1887
I DAVID WILLIAM NOAKES of Ernest Cottage Royal Hill Greenwich in the
County of Kent Hay Salesman do hereby declare the nature of my Invention for
"IMPROVEMENTS IN MAGIO LANTERNS AND LIME LIGHT APPARATUS to be as
follows:-
"
1. Rack and pinion adjustment for jet clamp as shown in drawing 1 at "A."
2. Masks to fit in spring stages making irregular shaped slides, uniform, as shewn
in drawing No. 2.
3. Arrangement to elevate lime cylinder by a toothed wheel gearing in grooves cut
on the circumference of a column, the column being revolved by worm wheel working
in flutes also cut on column as shewn in drawing 3.
4. Screwed vertical stud with two loose washers and two lock nuts for clamping
jets as shown in drawing 4.
5. Expanding chamber for condenser consisting of thin metal ring as shewn in
drawing 5.
6. Passing gas supply through one dissolver to another, serving bye-passes to jets
direct from main service, constructing dissolvers with inlet to plug of larger sectional
area than one outlet, as shewn in drawing 6.
Dated this Eleventh day of February 1886.

page_text: COMPLETE SPECIFICATION.
Improvements in Magic Lanterns and Lime Light Apparatus.
I DAVID WILLIAM NOAKES of Ernest Cottage Royal Hill Greenwich in the
County of Kent, Hay Salesman, 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 object of my invention is to increase the efficiency of Magic and optical
lanterns and also of Lime light apparatus used in connection therewith or separately
and to render the various essential parts of such instruments and apparatus capable of
more fine and accurate adjustment than hitherto, and particularly in the method of
dissolving when a double or triple lantern is used.
The several improvements effected by my invention are of such a nature and
character that all any or either of them may be used in combination or separately,
with any lantern or other suitable apparatus.
The rack and pinion adjustment shewn in Drawing 1 left with the provisional
specification I make and construct as follows-
I affix to the jet tray or slide a rack of suitable length and pitch. I mount on a
spindle carried to the outside of the body of the lantern a small pinion with teeth
corresponding to the pitch of the rack and so fixed as to gear into the rack as shewn
in drawing 1, aforesaid at A.
The spindle is then rotated by means of a milled head and the teeth of the pinion
gearing into the rack cause the tray or slide to travel to and from the condensing lenses
of the lantern carrying with it the jet and jet clamp attached.
The method I have described and shewn in drawing 1 aforesaid at A is a fixed
pinion with teeth parallel to the teeth of the rack.
The same result can be obtained by a worm wheel fixed to a spindle at right angles
to the teeth of the rack or by substituting a nut for the rack with a fixed screw working
in the nut.
The front elevation and section shown in Drawing 2 left with the provisional
specification_shew a mask with square aperture in position in the hood of the spring
plate of the Lantern stage.
I make the mask of suitable dimensions to slide easily into the hood as shewn in
the sectional view at A.
The Mask is made of brass or other suitable material and may be of any size or
shape required. Four shapes are shewn in drawing 2 aforesaid.
The advantage derived from masks made and used as hereinbefore described is
uniformity in size and shape of the pictures or images projected by the lantern.
Fig. 1 in drawing 3 left with the provisional specification shows the front elevation
of my device for revolving and raising or lowering the lime cylinders.
On the periphery of the column AI cut grooves of a pitch to suit the toothed
wheel B. I also flute the column A longitudinally to suit the pitch of the worm
wheel C.

page_text: I mount the toothed wheel and worm wheel on spindles which are extended through
the back of the lantern.
On rotating the toothed wheel B the column A is raised or lowered and on rotating
the worm wheel C the column is revolved.
By these means any part of the lime cylinder is brought to the point of impingement
of the gases.
To prevent the possibility of the column A dropping, the springs D D are so placed
as to press against the friction pins EE in the block F which pins communicate the
force of the springs to the spindles of the toothed wheel B and the worm wheel C and
thereby sustain the column A.
Block F is fitted into the V shaped slide G and by means of the rod H which is
extended through the back of the lantern it is traversed in the slide G and thereby
the lime cylinder is moved to the required distance from the nozzle of the jet.
Figs. 1. 2 and 3 in drawing 4 left with the provisional specification shew side and
front elevations and plan of my device for securing the jet and its accessories in the
required position.
A screw thread is cut on the circumference of the vertical clamp stud A on to which
the lock nut B is fitted. A loose washer C in which channels are cut to receive the
jet tubes D D is fitted above the nut above the jet tubes a similar washer E and
another lock nut F are fitted. The two lock nuts being turned on the screwed vertical
stud A so as to approach each other, the jet tubes are firmly gripped and held in the
required position.
Fig. 1. in drawing 5 left with the provisional specification shews the front elevation
of my device for permitting the expansion of the condensor. Fig. 2 on the same
drawing shews a section of the same and Fig. 3 on the same drawing is a plan
thereof.
A in fig. 2 is a thin metal ring fastened to the ordinary condensor tube B in the
back plate of the lantern stage. The ring is attached to the condensor tube in such
manner as to leave the greater part of the ring free to expand.
The condensor when in use is inserted in the ring A which being very thin in
substance readily expends and heat fracture of the lenses is thereby avoided.
Drawing 6 left with the provisional specification shews my method of dissolving
with a triple lantern.
The drawing illustrates particularly the method when two gases are in use but the
method can be applied when only one gas is used or when more than two are used.
1 construct a six way dissolver of any convenient shape or pattern making the inlets
to the plug or plugs of larger sectional area than any one outlet as shewn in the places
marked X on the drawing last referred to.
I also construct a second dissolver and the two dissolvers are then attached to the
lantern in any convenient manner or if preferred the second dissolver can be attached
to the first.
The method of using them is as follows the gas supplies are connected with the
primary dissolver at C, C, the primary dissolver is then connected to any one of the
three jets.
In the drawing I have shewn the primary dissolver connected to the top jet
at D D.
The two remaining outlets from the primary dissolver I connect to the inlets of the
second dissolver, and the latter is then connected with the two remaining jets.
The connections from the dissolvers to the jets may be made of any suitable
material. In the drawing they are supposed to be flexible rubber tubes.
Into each of the tubes connecting the dissolvers to the jets I introduce the tee
pieces marked E. To the gas main service tubes marked S I affix the bye pass cocks
marked B P. 1 connect these cocks with the tee pieces and thereby serve a small
quantity of gas to the jets after the service of gas from the dissolvers to the jets has
ceased.
By adopting my method of dissolving as herein stated any two of the three

page_text: combined lanterns can be made the dissolving pair, all three can be fully illuminated
at the same time or any one may be used alone at the will of the Operator.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed I declare that what I claim is-
-
1st. In a magic or optical Lantern or other instrument in which Lime light is used
-the arrangement of a rack and pinion to traverse the jet tray or slide with its
appendages to and from the Lenses.
2nd. In a Magic or optical Lantern interchangeable masks fitted to spring plate
of Lantern stage substantially as and for the purpose set forth.
3rd. In a Magic or optical Lantern or Limelight apparatus the mode of revolving,
raising and lowering the lime cylinders and of moving the Lime holder to and from
the nozzle of the jet by means of a groved and fluted column and toothed wheel and
worm wheel gearing into same and sliding block, which carries the bearings of the
said toothed and worm wheels substantially as and for the purpose set forth.
4th. In a Magic or optical Lantern or limelight apparatus the screwed vertical
stud with loose washers and lock nuts for clamping jets substantially as set forth.
5th. In a Magic or optical Lantern or other instrument the thin metal ring and
mode of mounting same substantially as and for the purpose set forth.
6th. In a Magic or optical Lantern or other instrument the construction of the
inlet to the plug of the dissolvers, the method of passing the gas supply through the
plug of one dissolver to the plug of another and the method of serving jets direct from
main service tubes by means of bye passes and tee pieces substantially as and for the
purpose set forth.
Dated this 4th day of March 1887.