A New and Improved Shutter for use with any kind of Photographic Apparatus.
Year: 1889

page_text: Date of Application, 7th Oct., 1889
Complete Specification Left, 22nd Apr., 1890-Accepted, 19th July, 1890
PROVISIONAL SPECIFICATION.
A New and Improved Shutter for use with any kind of
Photographic Apparatus.
CHARLES HODDLE 258A Mare Street Hackney Middlesex Boot and Shoe Maker do
bereby declare the nature of this invention to be as follows:-
My invention is a shutter made to provide a simple and ready means to expose
photographic dry plates when in the camera. It is made to work either before or
behind the lens but mostly in the diaphragm slot. The novelty in this shutter is that
it requires no setting or winding of springs as all other shutters do before an
exposure can be made. To make an exposure it is only necessary to press a small
button. And immediately the pressure is made it automatically sets itself ready for
the next exposure.
To effect this I make a shutter of thin sheet brass or other material shaped so
as to cover the lens and made with a short arm projecting at right angles to the lens,
and pivoted at the far end of the said short arm, close to the pivot I fasten on to
said arm a small slip catch, which is acted upon by a short stiff upright spring which
is attached to a thin brass driving rod running in guides, which has a small button
at bottom. This thin brass is heid back just underneath the said slip catch by a
spiral spring of suitable strength. The shutter is also held over the lens by a second
spiral spring, now on pressing the small button the shutter is lifted to a sufficient
height to uncover the lens. The short spring at top of driving rod then leaves the
slip catch and allows the shutter to spring back to original position. Then on
removing the pressure from the said button the driving rod springs back to its
original position also, and is immediately ready for the next exposure. The shutter
can be made to travel that it can be loosened or tightened at will. The shutter can
be adapted to any kind of photographic apparatus but it is invented chiefly for use with
the detective kinds.
Dated this 7th day of Datoh 1040
CHARLES HODDLE.
COMPLETE SPECIFICATION.
A New and Improved Shutter for use with any kind of
Photographic Apparatus.
1 CHARLES HODDLE of 258A Mare Street Hackney Middlesex, Bootmaker, 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 an improved shutter for photographie apparatus
whereby a simple and ready means of exposing dry plates when in the camera is
obtained, and the same is made to work either before or behind the lens but prefer-
ably in the diaphragm slot, the novelty of my improved shutter is that it requires no
setting or winding of springs (as is usually the case with other shutters) before an
exposure can be made it being only necessary to press the end of a driving rod which
lifts the shutter and thus allows the exposure, and upon the pressure being removed
it automatically sets itself ready for the next exposure, and consists as follows, the
shutter is made of thin steel, brass or other material and shaped so as to cover the
lens and it is fitted with a short arm projecting at right angles to the lens and this
arm is pivoted at the far end to a slip catch, a driving rod made of metal or other-
wise, and working within guides in a line with the slip catch is also employed, a
button or nob being attached to the bottom end of same to enable it to be readily
Price 6d 1

page_text: pressed upwards by the finger. At the top end of this driving rod a short stiff curved
or upright spring is fitted and this said spring works into the slip catch, upon the
driving rod being pushed up the aforesaid curved or upright spring presses upon the
slip catch and lifts the same with the arm and shutter attached to a sufficient height
to uncover the lens, but upon reaching a given point the spring releases itself from
the slip catch and the shutter immediately and rapidly springs back to its original
position a spiral spring being fitted to one corner of the slip catch and to the body of
the apparatus to ensure this action, a spiral spring is also fitted to the driving rod to
enable the same also to readily spring back to its position upon removing the pressure
of the finger from the button or nob so that the same is immediately ready for the
next exposure.
The shutter if necessary can be made to travel at various speeds by fixing
the bottom of the spiral spring of same to a lever so that it can be loosened or
tightened as required.
The shutter can be adapted to any kind of photographic apparatus but is chiefly
employed for the instantaneous or detective kinds.
The accompanying drawing represents a plan view of the apparatus.
A body of camera, B frame work to which the mechanism is fitted, the arm with
shutter attached thereto the shutter being shown in the dotted lines covering the lens D
the arm of said shutter being fixed to the slip catch E by means of screw F, and G
shows the driving rod with cross piece G¹ and to which is fitted the stiff spring H.
I spiral spring attached to the slip catch and the lever J, and K spiral spring fitted
to the cross piece of driving rod and to a screw or stud in the body of the camera.
The action is as follows-upon pressing up the driving rod G the stiff spring H
attached to the cross piece G¹ presses upon the slip catch E and lifts the same together
with the arm and shutter and raises the said shutter to a sufficient height to expose
the lens D but upon the slip catch reaching a given point the stiff spring H releases
itself from the slip catch and the same by means of the spiral spring I rapidly and
automatically falls and thus covers the lens again ready for the next exposure. Upon
removing the pressure from the driving rod it also rapidly falls to its original
position by means of the spiral spring K the lever J is used and employed to tighten
or loosen the spiral spring I and thus regulate the speed of the shutter.
I would here note that the details of the several parts of my Invention can be
varied without departing from the general principle of this my said Invention.
Having now fully described and ascertained the nature of my said Invention and in
what manner the same is to be performed I claim
First. The use and employment of the slip catch with arm and shutter attached
thereto and the spiral spring fitted to said slip catch for automatically closing the
shutter over the lens.
Second. The use and employment of the driving rod (working within guides) and
fitted with a stiff curved or upright spring to work into and raise the slip catch with
arm and shutter attached to a sufficient height to uncover the lens and upon reaching
the given height the curved or upright spring leaves the aforesaid slip catch and thus
allows the shutter to close as first above claimed, also the spiral spring fixed to the
driving rod to cause the same to spring back to its original position when the pressure
is removed, the whole combination substantially as above fully described and set
forth.
Dated this and love of Anil 1800
B. F. WALLACE WEATHERDEN & Co.,
11 & 12, Southampton Buildings, W.C., Agents for the Applicant.