Improvements relating to Gas Lamps for Photographic and other Purposes.
Year: 1895

page_text: Date of Application, 9th Nov., 1895
Complete Specification Left, 10th Aug., 1896-Accepted, 12th Sept.,
1896
PROVISIONAL SPECIFICATION.
Improvements relating to Gas Lamps for Photographic and other
Purposes.
I, ROBERT HALL BEST, of Cambray Works, Handsworth, in the County of
Stafford, Manufacturer, do hereby declare the nature of this invention to be as
follows:-
-
This invention consists of improvements, relating to gas lamps for photographic
and other purposes, my object being to arrange a cluster or combination of lamps
within a reflector in such a manner that an intense light can be readily directed
upon the required object.
In carrying my invention into effect, I attach a number of incandescent gas
lamps to one common base or delivery pipe which is connected at one end to a
flexible or other suitable gas supply pipe. The base or delivery pipe is preferably
formed from two pieces united by means of a spherical socket or connection,
having a tube fixed vertically within it through which I pass the lower end of the
rod suspended from a balanced crank arm such as described in my Specification
No. 6907 of 1893, on which Letters Patent have been granted to me.
The cluster or combination of lamps attached to the base or delivery pipe,
together with their glass chimneys are covered by a reflecting shade attached to
one end of the base or delivery pipe and supported by the suspension rod
herein before described. I preferably construct the reflecting shade from a thin
metallic plate or plates pressed or formed to a semi-spherical shape. Upon the
inner surface of the shade I rivet or otherwise attach asbestos or other suitable
sheeting, and face the same with plaster of Paris, thus producing an exceedingly.
smooth and reflecting surface.
The cluster or combination of lamps are so disposed in rows or files upon the
base or delivery pipe that the row or file of the greatest number of lamps coincides
with the centre or diameter of the shade, when placed in position. The rows or
files on each side of the central file contain a gradually diminishing number of
lamps to coincide with the diminishing space between the opposite sides of the
shade.
The balanced crank arm or lever to which the suspension rod is attached is
supported upon a tripod or other suitable stand, or is itself suspended from the
ceiling or from an overhead support. The lamps and the enveloping reflecting
shade can be readily adjusted to the required height by causing them to slide either
up or down the suspension rod, and they are secured at any desired position by a
screw nut or other suitable means.
1 also provide means for adjusting the inclination of the lamps and reflecting
shade preferably by a hinge-like connection between the base and the supply
pipes.
By my improved arrangement of incandescent gas lamps within a reflecting
shade I am enabled to readily direct a powerful light on to the required object
without loss from diffusion of the rays or other like causes.
Dated this o
-- 100
:
MARKS & CLERK,
18 Southampton Buildings, London, W.C., and
13 Temple Street, Birmingham, Agents for the Applicant.

page_text: ELE
Improvements relating to Gas Lamps for Photographic and other
Purposes.
I, ROBERT HALL BEST, of Cambray Works, Handsworth, in the County of
Stafford, 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 consists of improvements relating to gas lamps for photographic
and other purposes, my object being to arrange a cluster or combination of lamps
within a reflector in such a manner that an intense light can be readily directed
upon the required object.
In the accompanying sheet of explanatory drawings to be hereinafter referred to.-
Figure 1 is a general view of my improved illuminating apparatus mounted
upon a stand, and Figure 2 a similar view of the apparatus as arranged for
suspension from a ceiling or other over-head support.
Figure 3, is a plan to a larger scale showing the disposition of the burners, and
Figure 4 a sectional view of the central joint of the tubular frame.
The same reference letters in the different views indicate the same parts.
In carrying my invention into effect, I attach a number of incandescent or other
suitable gas lamps or burners such as A to a tubular framing consisting of one
common base or delivery pipe B having connecting branches C. To the end of
the base or delivery pipe B is attached a flexible supply pipe D conveying the
coal, acetylene, or other gas to the burners.
The base or delivery pipe B has a joint B¹ at or about its centre, and a joint B³
at the supply pipe end, the joint B¹ permitting of movement in a horizontal plane
and the joint B of movement in a vertical direction. The complete tubular
framing is suspended by means of a rod E from a balanced crank arm or lever F
such as described in my Specification No. 6907 of 1893, on which Letters Patent
have been granted to ine, which is mounted upon a stand such as G, Figure 1, or
is itself suspended by a rod H from the ceiling or other over-head support. The
burner framing can be readily moved up or down the rod E and secured at any
desired position by a screw nut or other suitable means.
The weight of the burners and frame suspended by the rod E is balanced by the
fixed weight J and the smaller and movable weight J', which is so set that the
lever will be in exact balance in any position to which it may be adjusted by
raising or lowering the complete framing together with the enclosing reflector K.
. The reflector K is attached to one end of the base or delivery pipe B as
illustrated, and is held in position on the rod E by an adjustable collar or bearing
permitting of its being turned in a horizontal plane. The reflector is of such
dimensions, and is so arranged as to cover the cluster of burners as illustrated.'
I preferably construct the reflector from a thin metallic plate or plates pressed or
formed to a semi-spherical shape, and upon the inner surface I rivet or otherwise
attach asbestos or other suitable sheeting painted white.
The cluster or combination of burners A are so disposed in rows or files upon
the base or delivery pipe B that the row or file of the greatest number of burners
coincides approximately with the centre of the reflector when placed in position.
The rows or files ou each side of the central file contain a gradually diminishing
number of burners to coincide with the diminishing space between the opposite
sides of the reflector. I place one or any required number of burners in the
reflector according to the intensity of light that is necessary.
By thus arranging the lamps within a reflecting shade 1 am enabled to readily
direct a powerful light on to the required object without loss from diffusion of the
rays or other like causes.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is.-
1. The improved illuminating apparatus for photographical and other purposes.
consisting in the arrangement of gas burners such as A within an enclosing reflector
such as K, substantially in the manner herein described.
2. In illuminating apparatus the combination of a cluster of gas burners such
as A mounted upon the branches C of the base or delivery pipe B having the
enclosing reflector K attached thereto, with a suspension rod E and balanced
lever F mounted upon a stand G or suspended from the ceiling or other support
by the rod H, substantially in the manner herein described.
3. The improved general construction and arrangement of an illuminating
apparatus for photographical and other purposes, substantially in the manner
herein described.
...
قيم
1000
MARKS & CLERK,
18 Southampton Buildings, London, W.C., and
13 Temple Street, Birmingham, Agents for the Applicant.