Improvements in Photographic Cameras.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in Photographic Cameras.
I, HENRY WOOD, of 45, Netherwood Street, Brondesbury, in the County of
London, Manufacturer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to improvements in photographic cameras and has for its
object improved means for changing or feeding the plates in position for exposure.
According to this invention I place the plates in a chamber at the back of the
camera in two rows one above the other, the top row having a partition, in front
whilst the bottom row is exposed.
Upon one side of the said chamber I provide a vertical slide or pusher consisting
of a plate formed with flanges on its sides between which the edges of the plates
for exposure are inserted. The upper end of the rear flange is formed with a lip
which engages with the rear-most plate of the top row to draw it down to position
behind the plate in the bottom row and the lower end of the front flange of the
slide is likewise formed with a lip for feeding the exposed plate up to and in front
of the top row of non-exposed plates. The slide is operated by means of a stud
passing through a vertical slot in the side of the case. Curved flat springs are
fixed to the partition in front of the top row of plates and similar springs are fixed
to, the back cover behind the lower row of plates for keeping the said plates in
proper working position.
I also provide an indicator showing the number of plates that have been
exposed and consisting of a ratchet wheel pivoted to the back cover and marked
on its face with numerals exposed to view through an aperture in the cover, the
said ratchet wheel being turned one tooth at a time upon each downward stroke of
the slide by means of a tooth or projection on the upper end of the rear flange of the
said slide.
Projections are fitted to the sides of the chamber so as to permit of the rear plate
only of the top row being drawn down and the front or exposed plate of the bottom
row being forced up in front of the plates in the top row."
The same number of plates are placed in each row and as soon as one is exposed
it is carried up into the upper row and one from the latter brought down into the
lower row to complete the complement of the latter.
J B. FLEURET,
5, Hatton Garden, London, Agent for the Applicant.

page_text: Improvements in Photographic Cameras.
I, HENRY WOOD, of 45, Netherwood Road, Brondesbury, in the County of
London, Manufacturer, do hereby declare the nature of this invention and in
what manner the same is to be performed to be particularly described and ascer-
tained in and by the following statement:-
.
This invention relates to improvements in photographic cameras and has for
object improved means for changing or feeding the plates in position for exposure.
For this purpose the plates are arranged in a chaniber at the back of the camera
in two rows one above the other the top row having a partition in front whilst
the bottom one is exposed.
Upon one side of this chamber is fitted a vertical slide or pusher consisting
of a plate formed with flanges on its sides between which the plates for exposure
are held. The upper end of the rear flange is formed with a lip which engages
with the rearward plate of the top row to draw it down to position behind the
plates in the bottom row, and the lower end of the front flange is likewise formed
with a lip for feeding or carrying the front or exposed plate up to and in front
of the top row of non-exposed plates.
This slide is operated by means of a stud passing through a vertical slot in
the side of the case or outer box of the camera. Curved flat springs are fixed to the
partition in front of the top row of plates and similar springs are fixed to the
back cover behind the lower row of plates for the purpose of keeping the said
row of plates in proper working position.
One side of the outer box is also provided with an indicator for shewing the
number of plates that have been exposed.
This indicator consists of a dial plate fitting into a recess in the side of the box
and marked on its outer face with numerals seperately exposed to view through
an aperture in the said side as the dial is revolved.
In order to operate the said dial a curved lever is pivoted in a recess behind
the same and provided with a spring arm.or pawl which engages with teeth or
pins on the back of the dial.
The end of this lever is provided with a pin passing through a slot in the side
of the box and acted upon by the slide or pusher so that as the latter is raised
it also raises the end of the lever causing the same to turn the dial a distance equal
to the space between two of the figures thereon.
When the pusher is lowered the lever is brought down to its normal position
by means of a spring connected thereto.
The top row of plates rests upon ledges or projections upon the sides of the
chamber which perimit of the rear plate only being drawn down. and the front
or exposed plate of the bottom row being forced up in front of the top row.
The said ledges are formed with slots into which are fitted the notched ends of
a plate or bridge-piece serving as a support for thin film sheaths but which is
removed when ordinary plates are used and placed in a slit or recess in the top of
the box.
And in order to clearly understand my invention reference is had to the accompany-
ing sheet of drawings in which Fig. 1 is a longitudinal vertical section of the outer
case or box of a camera fitted with my improvements. Fig. 2 is an end elevation
thereof and Fig. 3 is a side elevation shewing the indicator. Fig. 4 is a detail.
a is the outer case or box of a twin lens camera and b is the chamber at the back
provided with the hinged door c.

page_text: To one side of this chamber is fixed a plate d behind which is fitted the vertical
slide or pusher e.
The outer side of the said slide is formed with the flange or
ridge e¹ the upper end of which is provided with the lip e² and the inner side is
formed with the flange e³ provided with the lip e*.
The slide e is provided with a stud f passing through the slot f¹ in the side of
the box g is is the top row of plates in front of which is the partition h and g¹ is the
bottom row of plates in position for exposure i are the flat springs fixed to the
partition h for keeping the plates 9 in position and are similar springs fixed to
the door c for pressing the plates g¹ forward k, kare the ledges fixed to the sides of
the chamber 6 for supporting the upper row of plates g.
7 is the indicator dial centrally pivoted in the side of the box and marked with
numerals and m is the lever for operating the same provided with a pin m³ passing
through a slot m² in the box the said pin being acted upon by the upper end of
the slide e for raising the end of the lever and causing the spring pawl m³ thereon
to engage with one of the teeth or pins on the back of the dial for turning the
latter so as to bring one of the numerals opposite an opening in front of the dial
the lever m being brought back to its normal position by the spring m when the
slide is lowered.
The ledges k, k¹ are slotted for receiving the notched ends of the plate n shewn
seperately in Fig. 4 for the purpose of supporting film sheaths the said plate being
removed and placed in a recess n¹ in the upper part of the box when using ordinary
plates.
In order to change an exposed plate the slide e is raised the lip e4 carrying up
the said plate into position in front of the upper row of plates g. The slide is
then forced down thus causing the lip to force down the rear plate of the upper row
as shewn in Fig. 1 to fill up the vacant space in the bottom row left by 'the raising
of the exposed plate the same number of plates being provided in the top and
bottom rows.
The door c is fastened by spring or other catches and when opened permits of
the ready removal or replacement of the plates without scratching or handling the
film side.
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) In twin lens photographic cameras changing or feeding the plates in position
for exposure by the action of a vertical slide provided with lower and upper lips
for raising the front or exposed plate of a lower row of plates and lowering the rear
plate of an upper row of plates substantially as described and for the purposes
specified.
(2) In twin lens photographic cameras the combination with the outer case or
box a of a chamber provided with a hinged door c and a plate da vertical
slide e formed with flanges el e provided with lips e², et an operating stud f passing
through a slot f¹ upper and lower rows of plates g, gl a partition h springs i, i¹
ledges k, k¹ indicator dial 7 lever m pin m¹ slot m² pawl m³ teeth or pins spring m
plate n and slit or recess n' arranged and operating substantially as described and
for the purposes specified.
(3) The improvements in photographic cameras substantially as described and
shewn in the drawings.
J. B. FLEURET,
5, Hatton Garden, Holborn Circus, London, E.C.,
Agent for the Applicant.