Improvements in Photographic Cameras.
Year: 1889

page_text: Date of Application, 6th Apr., 1889
Complete Specification Left, 6th Jan., 1890-Accepted, 8th Feb., 1890
PROVISIONAL SPECIFICATION.
Improvements in Photographic Cameras.
I CLAUDE RAYMOND of 23 Boulevard de Strasbourg. Paris, France, Merchant, do
hereby declare the nature of this invention to be as follows:-
My invention has reference to photographic cameras of the kind generally called
bellows cameras, and it consists in improved means whereby these cameras can be
made to expand or contract as required.
For this purpose I fit the camera with two levers or rods crossing each other in the
form of the letter X and jointed together at the middle. One end of each lever is
jointed to a pivot and the other ond slides in a grooved guide. For easier. manipula-
tion of these levers one or both of the sliding ends is or are preferably fitted with a
milled button carrying a pinion which gears with a rack on the guide.
For a
The manner in which my invention can be best carried into effect will depend partly
upon the size of the camera. For a small portable camera I would have one pair of
the crossing levers at the top and another pair at the bottom of the camera.
larger camera I would have a pair of crossing levers at each side and in order to give
additional strength and to dispense with the bed portion a third pair can be placed at
the bottom, but without a pinion and rack. The levers of this third pair can be
ribbed to make them stronger and there may be a boss at their crossing point to
serve as a foot.
One or other of the side pairs of levers can be more or less extended so as to
slightly incline to one side the plate holder or front part of the camera carrying the
object glass. The levers can also have screw threaded or extensible parts so as to
allow of inclining the plate holder in a vertical direction.
Dated this oth day of April 1889.
J. C. MEWBURN,
55 & 56, Chancery Lane. London. Patent Acent
J. C. MEWBURN,
55 & 56. Chancery Lane. London, Patent Agent
COMPLETE SPECIFICATION.
Improvements in Photographic Cameras.
1, CLAUDE RAYMOND of 23 Boulevard de Strasbourg, Paris, France, Merchant, 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:-
My invention has reference to photographic cameras of the kind generally called
bellows-cameras and it consists in improved means whereby these cameras can be
made to expand or contract as required.
For this purpose I fit the camera with two levers or rods crossing each other in the form
of the letter X and jointed together at the middle. One end of each lever is jointed
to a pivot and the other end slides in a grooved guide. For easier manipulation of
these levers one or both of the sliding ends is or are preferably fitted with a milled
button carrying a pinion which gears with a rack on the guide.
The manner in which my invention can be best carried into effect will partly depend
upon the size of the camera. Figures 1 and 2 of the annexed drawings represent a
small portable camera constructed according to my invention. This camera has one
pair of the crossing levers at the top and another pair at the bottom of the camera.
A A are the crossing levers pivoted at a and b 6; the end c of one lever slides in a
grooved guided in the fixed part at the front of the chamber. At c on the other lever
is a pinion gearing with a rack on the grooved guide d¹, the pinion being fitted with
[Price 6d.]

page_text: a milled button. A pinion and rack may be provided for each pair of crossing levers
or for only one pair.
Figures 3 and 4 represent a larger camera constructed according to my invention.
In this case there is a pair of crossing. levers at each side and in order to give
additional strength and to dispense with the bed portion a third pair can be placed at
the bottom as shown but without a pinion and rack.
The levers of this third pair can be ribbed to make them stronger and there may be
a boss at their crossing point to serve as a foot.
One or other of the side pairs of levers can be more or less extended so as to
slightly incline to one side the plate holder or front part of the camera carrying the
object glass. The levers can also have screw threaded or extensible parts so as to
allow of inclining the plate holder in a vertical direction.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what I
claim is
1. In a photographic camera of the kind herein referred to the employment of
levers or rods crossing each other in the form of the letter ✗, the said levers being
jointed together at the middle and moving at one end in guides, whereby the
camera can be expanded or contracted as required, substantially as set forth.
2. In a photographic camera of the kind herein referred to the combination with
crossing levers or rods as claimed in claim 1, of a pinion and rack substantially as and
for the purpose set forth.
3. The improved photographic cameras hereinbefore described and represented in
the annexed drawings.
Dated this 6th day of Jan 1800
J. C. MEWBURN,
55 & 56, Chancery Lane, London, Patent Agent.