IMPROVEMENTS IN THE CONSTRUCTION OF PHOTOGRAPHIC CAMERAS to be as follows
Year: 1885

page_text: DONDE CON OF graph Cameras.
I HENRY PARK, of 1 Orchard Buildings, Kingsland Road, in the County of
Middlesex, Photographic apparatus Manufacturer, do hereby declare the nature
of my Invention for "IMPROVEMENTS IN THE CONSTRUCTION OF PHOTOGRAPHIC
CAMERAS to be as follows:-
"
The object of my invention is to manufacture photographic cameras in such a
manner that they may be capable of being folded into a very small compass, and
rendered very light and portable; and also mounted on the stand in such a manner
as to impart perfect steadiness, combined with improved means of attachment and
detachment to and from the stand.
In carrying out my invention, I construct the base board in the form of two
open frames, one sliding in the other, and the two together, when folded, being
equal in size to the back frame, or thereabouts. The base board and the back
board are secured together by hinges. The inner frame of the base board slides in
rabbets in the outer frame, and is governed, as to its position therein, by racks
fitted thereto, into which a pinion or pinions is or are geared, operated by a small
hand wheel with a milled edge.
The bellows body of the camera is made pyramidal, the largest end being fixed
to the frame of the back plate, and the smallest end to the frame of the focussing
lens. This latter frame also slides in an outer frame and is capable of being
raised, lowered, swung, and otherwise adjusted both vertically and horizontally.
The lower end of the focussing frame is hinged to a short slide, which is capable
of sliding in a rabbet or groove in the base board frame.
In order to effect my improved method of attachment to the tripod stand,
I provide a circular plate or board which is held to the stand by a screw and fly
nut. Upon the upper surface of this plate I form a wedge-dove-tail groove. To
the under-side of the base board I fix a corresponding wedge-shaped dovetail plate
or board.
The circular plate is capable of receiving a slight amount of buckling, which is
imparted thereto by turning the fly-nut, the buckling being effected by the
pressure of the radial arms under the plate arising from the action of the nut.
The fly-nut being loose and away from the boss, the camera can readily be
placed in position, the wedge plate easily entering the groove. When this has been
effected, the fly-nut is turned and made fast. This slightly buckles the plate,
whereby the wedge is firmly held in the groove, and cannot shift therein or be
moved therefrom until the nut is released, and the buckling of the plate thereby
removed.

page_text: Improvements in the Construction of Photographic Cameras.
I, HENRY PARK, of 1 Orchard Buildings, Kingsland Road, in the County of
Middlesex, Photographic Apparatus Manufacturer, do hereby declare the nature of
my said invention and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement:-
The object of my invention is to manufacture photographic cameras in such a
manner that they may be capable of being folded into a very small compass, and
rendered very light and portable, and also mounted on the stand in such a manner
as to impart perfect steadiness, combined with improved means of attachment and
- detachment to and from the stand.
In carrying out my invention, I construct the base board in the form of two
open frames, one sliding in the other, and the two together, when folded, being
equal in size to the back frame, or thereabouts. The base board and the back
board are secured together by hinges. The inner frame of the base board slides
in rabbets in the outer frame, and is governed, as to its position therein, by racks
fitted thereto, into which a pinion or pinions is or are geared, operated by a small
hand wheel with a milled edge.
The bellows body of the camera is made pyramidal, the largest end being fixed
to the frame of the back plate, and the smallest end to the frame of the focussing
lens. This latter frame also slides in an outer frame and is capable of being
raised, lowered, swung and otherwise adjusted both vertically and horizontally.
The lower end of the focussing frame is hinged to a short slide, which is capable
of sliding in a rabbet or groove in the base board frame.
In order to effect my improved method of attachment to the tripod stand,
I provide a circular plate or board which is held to the stand by a screw and fly-
nut. Upon the upper surface of this plate I form a wedge dovetail groove. To the
underside of the base board I fix a corresponding wedge shaped dovetailed plate or
board.
The circular plate is capable of receiving a slight amount of buckling, which is
imparted thereto by turning the fly-nut, the buckling being effected by the pressure
of the radial arms under the plate arising from the action of the nut.
The fly-nut being loose and away from the boss, the camera can readily be
placed in position, the wedge plate easily entering the groove. When this has
been effected, the fly nut is turned and made fast. This slightly buckles the plate,
whereby the wedge is firmly held in the groove, and cannot shift therein or be
moved therefrom until the nut is released, and the buckling of the plate thereby
removed.
And in order that my said invention may be particularly described and
ascertained, reference is hereby made to the accompanying drawings, in which
similar letters of reference indicate corresponding parts.
Fig. 1 is a side elevation of the camera, fully extended.
the same, closed. Fig. 3 is a view of the underside, closed.
of the circular plate k. Fig. 5 is a section of the same, and
horizontal bar of the frame a
Fig. 2 is a side view of
Fig. 4 is a plan view
Fig. 6 is a view of the

page_text: a is the outer base board. a¹ is the inner base board, which is made to slide in a.
b is the back plate, which is united to a by hinges p p. c is a brass frame which
holds the focussing frame, the height of the focussing frame being adjusted by set
screws c. d is the bellows body. e is an adjusting bar, with set screw e¹. fis
the head of the extending pinion f¹, which works in the racks g g, and by which
the inner base board a¹ is extended, as required. h is a dovetail plate, screwed
to the base board a. k is a circular plate, having plates 16 screwed thereto, formning
a dovetail groove to fit the plate h, which plate slides into the groove end wise.
When the plate k is placed in position as shown in Figs. 1, 2 and 3, the fly nut m
is screwed up until a slight buckling of the plate k takes place, whereby the wedge
is firmly held in position. oo are clips for holding the frames together, when
folded up.
Fig. 6 shews the form of the borizontal portion of the frame c.
It has an
opening at c¹, and the frame a¹ carries a set nut and screw n (shewn in dotted
lines in Fig. 1) under which nut the frame can be slipped, and held in position
by the nut n, without removing the nut from its position on the screw.
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. The manufacture and use of folding photographic cameras, constructed,
arranged, and operating, substantially as herein before described and shewn on the
drawings.
2. The general construction, combination, and arrangement of the several and
respective parts, together forming my improvements in the construction of
photographic cameras, substantially as herein before described and shewn on the
drawings.