Year: 1889

page_text: I WILLIAM CHARLES HUGHES of 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 :—
In limelight apparatus as hitherto constructed the tubes conveying the gases and the
burner are fixed to and incapable of being moved upon the foundation plato.
Now the object of my invention is to so construct an apparatus that shall be capable-
of a to and fro, a vertical and lateral movement, so that an operator can easily move
the limelight into accurate register with the focus of the lantern condensers.
In order that my invention may be the better understood I have appended the
accompanying sheet of drawings throughout which letters of like character, refer to
like parts.
Fig. 1 is a sectional side elevation Fig. 2. is a section through A. B Fig. 3. and
Fig. 3 is a plan view of the apparatus as constructed according to my invention.
In carrying out my Invention I use an ordinary foundation plate A which slides in
grooves at the bottom of the Magic Lantern in the usual manner upon said foundation
plate A I attach by screws a bracket B on one part of which rides the plate C (herein-
after termed the radial arm) at the back part of the bracket B I attach by screws a
rack D into which is geared a pinion E attached to the spindle F terminating after
passing through the hollow pillars G and H in a milled head I said hollow pillars G
and Hare firmly screwed to the radial arm C, the pillar H being further attached to the
crosspiece J by the countersunk screw K which serves as a pivot upon which the radial
arm and pillar G is free to move. From the foregoing it follows that by turning
the milled head I in the required direction the limelight can be moved into accurate
register with the focii of the condensers of the lantern in a lateral direction, but at the
same time it may be that the light is not in accurate register with the focus of the
condenser vertically to accomplish this latter I cause the tubes L L' to which are
attached vertical racks M M and the lime light jet N to slide up and down the hollow
pillars G and H in the following manner. To the milled head O is affixed a serrated
spindle P passing through the pillar C and H and also the tubes L L' in which are
n

page_text: cuts slots shewn more particularly at Fig. 2. to allow of their free up and down
movement, said serrated spindle P in passing through the pillars gears into the
racks M M so that an operator by turning the milled head O, in the direction required can
move the light into accurate register with the focus of the lantern condenser vertically
as before stated and the to and fro motion is accomplished by the worm, R. Fig. 3,
(moving with the spindle S, fitted into the bearings T attached to the bottom of the
lantern) gearing into the rack U. Thus upon the milled head V being turned causing
the whole apparatus to move bodily either to or fro as may be desired.
Having particularly described and ascertained the nature of my invention and in
what manner the same is to be performed I declare that what 1 claim is
1st. The apparatus shewn in Figs. 1 2 and 3 for moving the limelight into focal line
with the condenser of the lantern substantially as set forth.
2nd. The apparatus shewn in Figs. 1 2 and 3, for moving the limelight into focal
line with the condenser of the lantern together with the screw R and rack U as and
for the purpose set forth.
WILLIAM CHARLES HUGHES.