Improvements in and relating to Photographic Cameras.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements in and relating to Photographic Cameras.
SAMUEL DUNSEITH MCKELLEN, of 66, Lansdowne Road, Crumpsall, Manchester,
Photographic Engineer, do hereby declare the nature of this invention to be as
follows:-
My invention relates to magazine hand cameras and is intended to enable
hand cameras of high class workmanship and with certainty of action to be
made at a moderate cost. My invention relates to the changing system. I make
the camera in the form of a box carrying twelve (more or less) glass plates in
sheaths which stand one behind the other on a platform or on suitable supports
which have a small turned up projection against which the front of the bottom
ends of the sheaths rest. The sheaths are made about an eighth of an inch longer
than the glass plates so that when stored in the camera in the magazine the
top of the glass plates shall be an eighth of an inch or so below the top edge of
the sheaths which are made to clip the plates at the sides the top being open.
Thus there is a vacant space between the top edges of the sheaths which space is
intended for a purpose hereafter referred to. The top edge of the front sheath
rests against one or more small discs which are fixed on a shaft running parallel
with the sheath, from one side to the other, and at the top of the camera.
end of the shaft passes through the side of the camera and has a lever or key
attached to it.
Une
The discs have notches of a certain width & depth cut in their edges. When
the shaft & dises are in their normal position the top edge of the front sheath is
in these notches and pressing against the face which is nearest to the lens.
The contained plate is then in register and ready for exposure. After exposure
the lever or key is turned in the right direction so that the discs revolve and the
notches move towards the front of the camera. When this movement has
contined sufficiently the front sheath escapes from the notch and being unsup-
ported falls forward and releasing itself from the bottom support deposits itself
on the bottom of the camera. Whilst the discs have thus been revolving the
back edge of the notch has entered into the space before mentioned between
the front and second sheath and as soon as the front sheath has escaped the edge
of the second sheath falls on the periphery of the of the lises where it rests until
the shaft has been turned back to its normal position when the edge drops into
the notch where it remains ready for the next exposure.

page_text: SAMUEL DUNSEITHI MCKELLEN, of 66, Lansdowne Road, Crumpsall, Manchester,
Photographic Engineer, 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:-
One
My invention relates to magazine hand cameras and is intended to enable
hand cameras of high class workmanship and with certainty of action to be
made at a moderate cost. My invention relates to the changing system. I make
the camera in the form of a box carrying twelve (more or less) glass plates in
sheaths which stand one behind the other on a platform or on suitable supports
which have a small turned up projection against which the front of the bottom
ends of the sheaths rest. The sheaths are made about an eighth of an inch longer
than the glass plates so that when stored in the camera in the magazine the
top of the glass plate shall be an eighth of an inch or so below the top edge of
the sheaths which are made to clip the plates at the sides the top being open. Thus
there is a vacant space between the top edges of the sheaths which space is
intended for a purpose hereinafter referred to. The top edge of the front sheath
rests against one or more small discs which are fixed on a shaft running paralell
with the sheaths from one side to the other and at the top of the camera.
end of the shaft passes through the side of the camera and has a lever or key
attached to it. The discs have notches of a certain width and depth cut in their
edges. When the shaft and discs are in their normal position the top edge of
the front sheath is in these notches and pressing against the edge of the notch
which is nearest the lens. The contained plate is then in register and ready
for exposure. After exposure the lever or key is turned in the right direction
which causes the discs to revolve and the notches to move towards the front of
the camera. When this movement has continued sufficiently the front sheath
escapes from the notch and being unsupported falls forward and releasing itself
from the bottom supports is deposited in the bottom of the camera. Whilst the
discs have thus been revolving the back edge of the notch has entered into, the
space before mentioned between the front and second sheaths and as soon as the
front sheath has escaped the top edge of the second sheath is pushed forwards
against the periphery of the discs where it rests until the shaft has been turned.
back into its normal position when the edge enters the notch where it remains
ready for the next exposure. I do not confine myself to the method of turning
the discs now described as instead of a lever it may be done by a cord working
a pulley or by a segment of a toothed or milled circle attached to the shaft inside
of the camera and projecting through the top or by a milled head instead of
the lever on the outside or by any suitable means. In order that my invention
may be more readily understood I have annexed hereto one sheet of drawings
with a description of the same of so much of a camera as is necessary to explain
the action of the said invention.
Fig. 1 on the drawing is a vertical longitudinal section of the rear end of a
camera where the sheaths are placed. Fig. 2 is an end view with door removed
and Fig. 3 a detached view of Fig. 1. Figs. 4 & 5 are an edge view and plan
view respectively of one of the sheaths. The same letters refer to corresponding
parts on the different views. a represents the body of the camera b the platforms
or angle plates which carry the sheaths. c, & the shaft on which are two
d is a handle on the end of the shaft d, and f is the spring for
pressing the sheaths into register. As will be seen on Fig. 1 the upper edge of
discs e, e.

page_text: .
the front sheath c¹ is resting in the notches e* of the discs this being the normal
position when the shaft is revolved by the handle d' in the direction of the arrow
the first sheath is released and the second takes its place as seen in Fig. 3. Upon
the handle being returned to its normal position the second sheath enters the
notches and after exposure it is removed in the same manner as before and so on
until all the plates have been exposed. The discs may be mounted in the camera
independently of a shaft by being attached to the sides and rotated by any
convenient means but I prefer the method now fully described as being easily
made and certain in action.
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 :-
-
In a magazine hand camera the use of notched dises for the purpose herein
stated substantially as described.
3 1
لبيت
L
1000