AN IMPROVEMENT IN THE CONSTRUCTION OF PHOTO- GRAPHIC STUDIOS
Year: 1876

page_text: LETTERS PATENT to Robert Slingsby, of the Town and County of Lincoln,
for the Invention of "AN IMPROVEMENT IN THE CONSTRUCTION OF PHOTO-
GRAPHIC STUDIOS."
Sealed the 27th April 1877, and dated the 11th November 1876.
PROVISIONAL SPECIFICATION left by the said Robert Slingsby at the
Office of the Commissioners of Patents on the 11th November 1876.
ROBERT SLINGSBY, of the Town and County of Lincoln.
IN THE CONSTRUCTION OF Photographic STUDIOS."
"AN IMPROVEMENT
My Invention relates to a further improvement in the photographic studios
described in the Specification of Letters Patent granted to me bearing date the
24th September, 1875, No. 3352. As therein described the side and skylights of
the studio are both constructed with a double inward pitch or inclination at the
centre, and the present improvement consists in the addition to the studio so cou-
structed of a vertical light having likewise a double inward pitch or inclination at
the centre corresponding to that of the sky and side lights, this vertical light meet-
ing the highest part of the skylight and rising therefrom to the ridge of the roof of
the studio. I ain thus enabled to increase the area of the skylight and obtain in
addition a vertical light between the skylight and the ridge of the roof which cuts
into the ridge and serves to illuminate the other side of the studio or reflecting
screens suitably disposed, the results being a still shorter time of exposure, a soften-
ing of the shadows, and greater delicacy of modelling.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Robert Slingsby in the Great Seal Patent Office on the 10th May
1877.
ROBERT SLINGSBY, of the Town and County of Lincoln. "AN IMPROVEMENT
IN THE CONSTRUCTION OF PHOTOGRAPHIC STUDIOS."

page_text: My Invention relates to a further improvement in the photographic studios
described in the Specification of Letters Patent granted to me bearing date the 24th
September, 1875, No. 3352. As therein described the side light and skylight of
the studio are both constructed with a double pitch or inclination inwards at the
centre, and the present improvement consists in the addition to the skylight of a
studio so constructed of a vertical light having a corresponding double pitch or in-
clination inwards at the centre, this vertical light meeting the skylight and rising
to or slightly above the ridge of the roof. Thus the area of the skylight is
increased and an additional vertical light is obtained which serves to illuminate
either the opposite side and ends of the studio or reflecting screens suitably dis-
posed, the results being a still shorter time of exposure, a luminosity in the shadows,
and greater delicacy of modelling.
Figure 1 is a front elevation of the studio; Figure 2 is a roof plan, and Figure 3
a floor plan of the same, and Figure 4 is a transverse section taken on line 1-1,
Figure 2, part of the framework of the roof being omitted for the sake of
clearness.
C is the side light and D the skylight, constructed precisely as described in
my former Patent, except that the upper edge of the skylight instead of running
straight from a to a as indicated by the dotted line, figure 2, is now in two oblique
lines parallel or nearly so to the lower edge at the eaves, so that the area of the
skylight is increased to this extent. E is the vertical light above the skylight,
having a double inclination inwards from the ends to the centre line c corresponding
to that of the side and skylights, the vertical light E and side light C being in
parallel planes, or nearly so, as shown. The vertical light E rises to or above the
ridge F of the roof as shown in Figure 1, and is at the ends, preferably in or about
the line of the ridge, and extends inwards at the centre towards the back or other
side of the studio as clearly shown in the plan view.
The construction of the framework of the studio may be varied. In the example
shown, A, B, are framed principals supporting a trussed girder G which carries the
vertical light E and the intervening flat portion H of the roof.
Having described the nature of my said Invention and the manner of performing
the same,
I declare that what I claim as the Invention to be protected by the herein-
before in part recited Letters Patent is the combination in a studio having side and
skylights (or a skylight only) of the construction described of the vertical light
above the skylight constructed with a double inclination, substantially as herein
shown and described.
In witness whereof, I, the said Robert Slingsby, have hereunto set my hand
and seal, this Ninth day of May, in the year of our Lord One thousand
eight hundred and seventy-seven,
ROBERT SLINGSBY. (L.S.)