Year: 1889

page_text: therewith.
I WILLIAM CHARLES HUGHES Brewster House 82 Mortimer Road De Beauvoir
Town N. Optician 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 First: to enable the operator of Magic Lanterns to
register same from behind instead of the front as is now usual. Second: To provide
a diaphragm of such construction as to ensure the greatest ease and accuracy in
manipulating the same. Third: The more perfectly adjusting the slides in the
lantern. Fourth: Providing for the more even pressure of the gases to the lime
light jet.
In order that my invention may be the better understood I have appended the
accompanying sheet of drawings in which the same letters of reference apply to like
parts throughout the several figures.
Figures 1 and 2 are general views shewing the application of my improvements
and are a side sectional elevation and front view respectively. Figure 3 is a detail
view of the spindle by which the registering is accomplished. Figure 4 is the
improved diaphragm. Figure 5 is a detail of the slider that operates the shutters on
the diaphragm. Figure 6 is the apparatus for levelling the slides. Figure 7 is a
back view of the apparatus for ensuring a more even pressure of the gases.
In carrying out my invention I pass through the body of the lantern J a rod A to
the back end of which is fixed a milled head F the opposite end of the rod A being
screwed to fit the nut R through which it passes, the part at the extreme end that is
not screwed being recessed as at B Figure 3. thus forming a stud or button C which
fits into the recess C³ of the nut D in which it is free to turn, but cannot either be
pulled or pushed out owing to the button C being larger than the slot B¹ which is
only of the size of the recessed part B of the rod A the nut D being rigidly fixed in
the position shewn at Figure 2 it being clamped to the part P of the lantern by the
milled screw E, said part P Figures 1 and 2 is hinged at O so that upon the operator

page_text: wishing to throw the transmitted picture higher upon the screen or lower as the case
may be, he can do so from behind by turning the milled head F in the necessary
direction.
Referring to the second part of my invention I pierce the diaphragm in three
places as seen more particularly at Figure 4 two of the apertures are covered by the
shutters H H H sliding in grooves recessed in the diaphragm. When placed in the
position shewn at Figures 1 and 2. the shutters H H rest upon and are held in
position by a sliding arm N Figure 5. moving in the slot S and can be fixed in any
desired position by the handle M being turned upon the spindle T upon which it is
screwed clamping itself against the edge of the plate P and there being held.
In Figure 2 the middle lantern is shewn covered by the shutter H and the bottom
lantern uncovered supposing as an instance it is required to reverse this order it is
instantly done by simply slacking the handle M on the screw T and in the one case
lift the handle thus lifting the shutter from the middle lantern uncovering same
and in the other case slacking the handle M as before and lowering the slider and
with it the shutter H thus covering the bottom lantern, and should it be required to
lift the diaphragm G it is done by turning the crank L attached to the fluted roller K
gearing in the 2 racks II of which till now only one has been used with the
result that the diaphragm was unevenly lifted and not without some trouble.
The part W Figure 6 is attached to the part d of the lantern in any suitable
manner, and the slide when inserted rests upon the platform Y and when it is required
to adjust the slide it is done by turning the milled head ✗ attached by the spindle e
to the pinion Z lifting or lowering same as may be desired then by the use of the
nut VI am enabled to clamp it firmly in position. At the joints of tho gas distributor
I employ a hollow sphere forming a reservoir and the gas issuing from the inlet pipo f
and impinging against the side of the sphere causes a resistance which I find enables
the gas to pass to the jets with more even pressure.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed 1 declare that what I
claim is
First. The registering of the lantern from behind by means of the rod A and
parts D and E substantially as described and set forth.
Second. The use of a diaphragm with 3 apertures and 2 racks and the shutters HH
operated by the slider N and the handle M and crank L and roller K, substantially
as set forth and described.
Third. The platform Y and pinions Z with the clamping nut substantially as
and for the purpose set forth.
Fourth. The use of hollow spheres at the joints of the gas distributor as set
forth.
Dated this 29th day of January 1889.