An Improvement in Photographic Cameras.
Year: 1892

page_text: Date of Application, 21st Jan., 1892
Complete Specification Left, 20th Oct., 1892-Accepted, 26th Nov., 1892
PROVISIONAL SPECIFICATION.
An Improvement in Photographic Cameras.
I EDWARD CHARLES HAWKINS Scientific Instrument Maker 5 High Street
Bloomsbury, London W.C. do hereby declare the nature of this invention to be as
follows:-
This invention is for the purpose of readily bringing a series of photographically
sensitive surfaces one after the other into a vertical position opposite the lens of a
camera for exposure to the action of light.
I provide for this purpose suitable carriers or sheaths to contain the said sensitive
surfaces, having essentially arms or extensions on their lower edges, upon which
they are supported and by means of which, they are successively removed from the
vertical to a horizontal position. The said extensions slide upon guides, the sheaths
being pressed forward by a spring and retained in position for exposure to the action
of light by a fixed stop at the top of the camera. The extensions of the foremost
carrier engage in notches in movable levers placed on the sides of the camera, these
levers being moved by suitable mechanism, so that the notches travel in a downward
direction the foremost carrier is pulled down free of the aforementioned stop, at
the same time the arms or extensions meet with slanting guides which cause the
extensions to leave. the notches of the levers, and so liberate the carrier which is
being removed that it is free to fall of its own weight on the botton of the camera,
where, by the return movement of the mechanism which moves the levers, it may
be clamped and held firmly.
The notched levers being returned to their first position now engage in the
extensions of the next carrier which is brought into position by the aforementioned
spring.
,
The levers may be of any suitable form and operate by any suitable means, and
I provide that the same mechanism which operates the levers may also by its
movement make room for the carrier which is being changed, and also act to set a
suitable shutter, and the return movement preferably caused by a spring or springs,
may clamp the carriers which have been removed and retain them rigidly so that the
camera may be conveniently carried about, or turned on its side so as to make an
exposure in that manner if so desired.
Dated this 21st day of January 1892.
COMPLETE
SPECIFICATION.
An Improvement in Photographic Cameras.
I, EDWARD CHARLES HAWKINS, of 5 High Street Bloomsbury, in the County
of London, Scientific Instrument Maker do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :—
My invention relates to an improvement in photographic cameras, and has for its
object a method and means of readily bringing a series of photographically sensitive
surfaces one after the other into a vertical position opposite the lens of a camera for
exposure to the action of light.
In order that my invention and the manner of operating the same may be
the better understood I have appended the accompanying sheet of drawings in
which
Fig. 1. is a longitudinal vertical section of a camera provided with the improve-
ments constituting the subject matter of my invention.

page_text: Fig. 2. is an elevation with the end A removed for the purpose of illustrating the
position and formation of the respective internal parts.
Fig. 3. is an elevation of the lever B drawn to an enlarged scale.
Fig. 4. is an elevation of the bracket C drawn to an enlarged scale.
Fig. 5. is a front elevation and Fig. 6. a side elevation of the carrier or sheath D
drawn to an enlarged scale.
Similar letters of reference are used to indicate corresponding parts throughout
the drawings.
In carrying my invention into effect I provide suitable carriers or sheaths D, to
contain the said sensitive surfaces having essentially arms or extensions E or their
lower edges upon which they are supported and by means of which they are
successively removed from the vertical to a horizontal position. The said
extensions E slide upon guides G in the brackets C the carriers or sheaths D being
pressed forward by a spring H and retained in position for exposure to the action
of light by a fixed stop J at the top of the camera, the extensions E of the foremost
carrier or sheath engage in notches K in moveable levers B placed at the sides of
the camera these levers being moved by suitable mechanism so that the notches K
travel in a downward direction the foremost carrier or sheath is pulled down free
of the stop J at the same time the arms or extensions E meet with slanting
guides L which cause the arms or extensions E to leave the notches K of the
levers B and so liberate the carrier or sheath D which is being removed that it is
free to fall to the bottom M of the camera where by the return movement of the
mechanism which moves the levers B it may be clamped and held firmly.
The notched levers B being returned to their first position now engage the arms
or extensions E of the next carrier or sheath D which is brought into position by
the spring H.
The levers B may be of any suitable form, and operate by any suitable
mechanism, the mechanism shown consists of a moveable partition N having pins P
at each side which work in slots Q in levers B, attached to partition N are two
push rods R passing through guides S fastened to lens board T and connected with
a cross piece U provided with a handle V a hole W being cut in the end X of the
camera for the end of V to pass through, and I provide that the same mechanism
which operates the levers B may also by its movement make room for the carrier or
sheath D which is being changed and also act to set a suitable shutter and the
return movement preferably caused by a spring or springs Y may clamp the carriers
or sheaths D which have been removed to the bottom M of the camera and retain
them rigidly so that the camera may be conveniently carried about or turned on
its side so as to make an exposure in that manner if so desired.
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 :-
An improvement in photographic cameras consisting of a means of readily
bringing a series of photographically sensitive surfaces one after the other into a
vertical position opposite the lens of a camera for exposure to the action of light
substantially as described and shewn by the drawings hereunto appended of the
lever B in Fig. 3 and slanting guide L in Fig. 4.
Dated this 20th day of October 1892.
EDWARD CHARLES HAWKINS.