A NEW OB INDROWED CAMERA OD LANZARRE FOR REFLECTING OPAQUE OBJECTS
Year: 1868

page_text: LETTERS PATENT to Edmund Johann Krüss and William Andres
Krüss, Owners of the Firm of A. Krüss, Opticians, in the City of
Hamburgh, Adolphs-brücke, 7, for the Invention of "A NEW OB
INDROWED CAMERA OD LANZARRE FOR REFLECTING OPAQUE OBJECTS.”
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OD LAWTERE FOR ReyLECTING OPAQUE OBJECTS."
PROVISIONAL SPECIFICATION left by the said Edmund Johann Krüss
and William Andres Krüss at the Office of the Commissioners of
Patents, with their Petition, on the 2nd January 1868.
We, EDMUND JOHANN KRÜSS and WILLIAM ANDRES KRÜSS, Owners
of the Firm of A. Krüss, Opticians, in the City of Hamburgh, Adolphs-
brücke, 7, do hereby declare the nature of the said Invention for
"A NEW OR IMPROVED CAMERA OR LANTERN FOR REFLECTING OPAQUE OBJECTS,'
to be as follows:-
The object of our Invention is to arrange lights and lenses, and to
construct the whole apparatus in such manner that the light of a lamp
or candle will reflect opaque objects upon the wall in a magnified form.
We are aware that an apparatus has already been constructed to reflect
opaque objects upon the wall, but it has required the use of oxyhydrogen
gas and is very expensive, while our apparatus is simple and cheap.

page_text: Our apparatus consists of an outer box or case fitted at one side with a
tubular mouth similar to that employed in an ordinary magic lantern,
while the opposite side is provided with a door to allow of the insertion
at a point opposite the tubular mouth of the object to be reflected.
A lamp or candle is introduced by another door and is placed so that
the flame is between a curved reflector and two or other convenient
number of concentrating lenses. The position and curve of the reflector
are such that the light of the lamp or candle is reflected towards the
concentrating lenses, which are placed in a direct line between the
flame and the object to be reflected on the wall; the reflected rays
as well as the direct rays from the flame thus pass through the con-
centrating lenses which concentrate them upon the object to be reflected.
The powerful light thus thrown on the object admits of the image
being reflected through the tubular mouth, and an object glass or lense
placed in the mouth magnifices the image to the required size.
SPECIFICATION in pursuance of the conditions of the Letters Patent
filed by the said Edmund Johann Krüss and William Andres Krüss
in the Great Seal Patent Office on the 1st July 1868.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, EDMUND
JOHANN KRÜSS and WILLIAM ANDRES KRÜSS, Owners of the Firm of
A. Krüss, Opticians, in the City of Hamburgh, Adolphs-brücke, 7, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent bearing date the Second day of January, in the year
of our Lord One thousand eight hundred and sixty-eight, in the thirty-
first year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto us, the said Edmund Johann Krüss and William Andres
Krüss, Her special licence that we, the said Edmund Johann Krüss and
William Andres Krüss, our executors, administrators, and assigns, or
such others as we, the said Edmund Johann Krüss and William Andres
Krüss, our executors, administrators, and assigns, should at any time
agree with, and no others, from time to time and at all times thereafter
during the term therein expressed, should and lawfully might make,
use, exercise, and vend, within the United Kingdom of Great Britain
and Ireland, the Channel Islands, and Isle of Man, an Invention for

page_text: "
"A NEW OR IMPROVED CAMERA OR LANTERN FOR REFLECTING OPAQUE OBJECTS,'
upon the condition (amongst others) that we, the said Edmund Johann
Krüss and William Andres Krüss, or one of us, our executors or
administrators, by an instrument in writing under our, or one of
our, or their, or one of their hands and scals, should particularly
describe and ascertain the nature of the said Invention, and in what
manner the same was to be performed, and cause the same to be filed
in the Great Seal Patent Office within six calendar months next and
immediately after the date of the said Letters Patent.
NOW KNOW YE, that we, the said Edmund Johann Krüss and
William Andres Krüss, do hereby declare the nature of our said
Invention, and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement
thereof, reference being had to the Drawings hereunto annexed, that
is to say :-
The object of our Invention is to arrange lights and lenses and to
construct the whole apparatus in such manner that the light of a
lamp or gas burner will reflect opaque objects upon the wall or other
surface in a magnified form. We are aware that an apparatus has
already been constructed to reflect opaque objects upon the wall, but
it has required the use of oxyhydrogen gas and is very expensive, while
our apparatus is simple and cheap.
Our apparatus consists of an outer box or case fitted at one side
with a tubular mouth similar to that employed in an ordinary magic
lantern, while the opposite side is provided with a door to allow of
the insertion at a point opposite the tubular mouth of the object to
be reflected. A lamp or a gas burner is introduced by another door
and is placed so that the flame is between a curved reflector and two
or other convenient number of concentrating lenses. The position and
curve of the reflector are such that the light of the lamp or burner
is reflected towards the concentrating lenses, which are placed in a
direct line between the flame and the object to be reflected on the
wall; the reflected rays as well as the direct rays from the flame
thus pass through the concentrating lenses which concentrate them
upon the object to be reflected. The powerful light thus thrown on
the object admits of the image being reflected through the tubular
mouth, and an object glass or lens placed in the mouth mages
the image to the desired size.

page_text: The construction of our camera or lantern will be fully understood
by the accompanying Drawings.
Figure 1 is a horizontal section through the line 1-1 of Figure 2;
Figure 2 is a vertical section through the line 2-2 of Figure 1; Figure 3
is a vertical section through the line 3-3 of Figure 1; and Figure 4
is a top view.
: a is an outer box or case, the interior of which is divided by a
partition 6 into two compartments; c is a tubular mouth like that of an
ordinary magic lantern; d is a door opposite the mouth c; this door is
to allow of the insertion and withdrawal of the object d¹ to be reflected,
and it may be constructed in such manner as to hold cartes de visite
or other articles. In the Drawings it will be seen that a carte de visite
can be inserted and withdrawn without opening the door; e is another
door at right angles to the door d; it is for the purpose of allowing
of the insertion of an oil lamp f. The bottom of the box is formed
with holes g to admit air for supporting combustion, and is provided
with a shoe h to receive the lamp and facilitate its adjustment; i is
a curved or concave reflector; it is held in position by its stem k
entering loops on the body of the lamp; m, n, are two concentrating
lenses held in a tube o in the partition b; p, q, are two unachromatic
plano-convex glasses held in a tube r free to slide in the tubular
mouth c; 8 is the chimney of the box; t is an opening or slot in the
top of the box to allow of the insertion or passage of the lamp chimney;
this opening t is closed by a horizontal piece u on the top of the door e.
The rays of light reflected by the reflector i pass together with the direct
rays through the concentrating lenses m, n, which concentrate them
upon the object d¹. The powerful light thus thrown on the object
admits of the image being reflected through the tubular mouth c; the
glasses p, q, in this mouth magnify the image to the required size.
It will probably be found convenient to provide the tuber with a rack
and pinion arrangement to facilitate its adjustment in the tubular
mouth c in order to obtain the proper focus.
Although we have shown an oil lamp as applied to the apparatus
yet we do not confine ourselves thereto as in some cases we fit the
apparatus with a gas burner which may be connected by an elastic
tube with any convenient gas supply, or any other convenient mode
of lighting may be employed.
And having now described the nature of our said Invention, and in

page_text: what manner the same is to be performed, we declare that we claim
constructing cameras or lanterns for reflecting opaque objects substan-
tially as herein-before described and represented in the accompanying
Drawings.
In witness whereof we, the said Edmund Johann Krüss and
William Andres Krüss, have hereunto set our hands and seals,
this Twenty-ninth day of May One thousand eight hundred and
sixty-eight.
E. J. KRÜSS.
(L.S.)
W. A. KRÜSS. (L.S.)