Improved Tray for carrying the Illuminant in Optical Lanterns provided with Mechanical Adjustments to bring the Light to the Optical Centre.
Year: 1896

page_text: Date of Application, 5th Nov., 1896
Complete Specification Left, 5th Aug., 1897-Accepted, 5th Oct., 1897
Improved Tray for carrying the Illuminant in Optical Lanterns
provided with Mechanical Adjustments to bring the Light to
the Optical Centre.
ALEXANDER GEORGE SMITH Optician 23 & 25 St. Nicholas Street, Aberdeen do
hereby declare the nature of this invention to be as follows:-
A sheet of metal to fit the guides in the lantern has fixed across one end two
parallel tubes both opened up along the top side, in these tubes are fitted two tubes
or rods free to slip along the first tubes, this allows a horizontal motion being given
to the luminant, a rack & pinion or screw may be fitted to the sliding Rods. A
small platform is fixed to the sliding Rods, this platform carries one or two upright
guide rods along with a screwed rod pivotted through the platform, a metal attach-
ment to carry the luminant is fitted to the guide rods & screwed to suit the upright
screw so that when the rod is turned by means of a handle at the top the attach-
nent is made to move up & down. The metal attachment may be part of the
support for the luminant or have a right angled rod for the usual attachınent.
Dated this 4th day of November 1896.
Improved Tray for carrying the Illuminant in Optical Lanterns
provided with Mechanical Adjustments to bring the Light to
the Optical Centre.
I, ALEXANDER GEORGE SMITH 23 St. Nicholas Street Aberdeen 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 tray consists of a bed plate A to fit the guides in the lantern. On this plate
is fixed a bar of metal B with a toothed rack along one side, two bars may
be used if desired. On this bar is a carriage C provided with a pinion to engage with
the rack & a suitable handle H to turn the pinion, by this means the illuminant is
made to move parallel to the bed plate.
From the carriage two or more rods D, E rise to suitable height; one of these rods I)
is screwed & is free to turn, a proper handle K being provided by which to turn it.
Threaded on the upright rods is a metal plate F with plain & screwed holes to fit the
rods, when the screwed rod is turned this plate moves up & down, the direction
depending on which way the rod is turned. On the plate a suitable arın to carry the

page_text: illuminant is fixed. By means of the screwed rod & guides the illuminant is made
to move at right angles or perpendicular to the bed plate.
When an electric are lamp is used I may provide a moveable carrying arm L so
that the lamp can be turned in a circle with the arm as a centre, by this means the
carbons can be used in a perpendicular position or at any angle with the bed plate A
which may be desired. A thumbscrew at L is provided to lock the lamp in place.
The drawings show a tray, with an arc lamp, with all adjustments.
A is the bed plate, B the toothed bar for the parallel & horizontal adjustment.
C is the carriage.
D the screwed rod, E plain guide rods.
F is the plate for carrying the lamp.
G an electric arc lamp in place.
His the handle for the parallel & horizontal motion.
K is the handle for the perpendicular motion.
Lis the thumbscrew for adjusting the position of the lamp.
Having now particularly described and ascertained the nature of my said
invention & in what manner the same is to be performed I declare that what. I
claim is
1st. The use of a screwed rod to raise & lower the illuminant
2nd. The use of a moveable pin L as described to allow the illuminant to be turned
to any angle with the bed plate of the tray.
1005