IMPROVEMENTS IN THE MEANS FOR UNCAPPING AND CAPPING THE LENSES OF PHOTOGRAPHIC APPARATUS to be as follows
Year: 1884

page_text: I FREDERICK WOODWARD BRANSON of Leeds in the County of York, Pharma-
ceutical Chemist do hereby declare the nature of said invention for "IMPROVEMENTS
IN THE MEANS FOR UNCAPPING AND CAPPING THE LENSES OF PHOTOGRAPHIC
APPARATUS to be as follows:-
"
My invention has for its object the application of pneumatic or hydraulic
pressure for photographic purposes, so that the lens by means of a shutter or other
covering is uncapped or exposed as may be required.
This invention is particularly applicable to my improvements in photographic
shutters for which Provisional Protection has been granted to me the 5th February
1884 N° 2767 and entitled "Improvements in photographic shutters” although the
invention is applicable to other photographic shutters.
My invention is as follows:-
I apply a cylinder which is attached to the side or framework of the shutter so
that it is capable of oscillation. Within this cylinder is provided a piston which is
coupled by means of a piston rod to a crank on the end of the flap spindle referred
to in the Provisional Specification of the above mentioned invention. At the
bottom of the cylinder I insert a hollow plug the inner end of which is covored by
preference with india rubber and to the outer end is attached a tube. The piston
rests upon the india rubber cover, and such india rubber cover being expanded within
the cylinder by hydraulic, or pneumatic pressure transmitted through the tube
forces the piston upwards, which through the medium of the piston rod, crank and
flap spindle rotates or raises the flap and exposes the lens. On withdrawing the
pressure the india rubber returns to its normal position and allows the piston to
fall and the flap to close.
Dated this Eleventh dow of Tune 70OA
J. W. HARDING,
Agent for the Applicant.

page_text: I FREDERICK WOODWARD BRANSON, of Leeds, in the County of York, Pharma-
ceutical Chemist do hereby declare the nature of said invention for "IMPROVEMENTS
IN THE MEANS FOR UNCAPPING AND CAPPING THE LENSES OF PHOTOGRAPHIC
APPARATUS 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 for its object the application of pneumatic or hydraulic
pressure for photographic purposes, so that the lens by means of a shutter or other
covering is uncapped or exposed as may be required.
This invention is particularly applicable to my improvements in photographic
shutters for which Letters Patent have been granted to me dated 5th February 1884
and entitled "Improvements in photographic shutters."
My invention is as follows:-
I apply a cylinder which is attached to the side or framework of the shutter so
that it is capable of oscillation.
Within this cylinder is provided a piston rod to a crank on the end of the flap
spindle referred to in the specification of the above mentioned invention. At the
bottom of the cylinder I insert a hollow plug, the inner end of which is covered by
Preference with india rubber, and to the outer end is attached a tube.
The piston
rests upon the india rubber cover, and such india rubber cover being expanded
within the cylinder by hydraulic or pneumatic pressure transmitted through the
tube, forces the piston forwards, which through the medium of the piston rod,
crank and flap spindle, rotates or raises the flap and exposes the lens.
On withdrawing the pressure the india rubber returns to its normal position and
allows the piston to fall and the flap to close.
And in order that my invention may be more completely understood reference is
given to the accompanying drawings and to the letters and marks thereon.
-
DESCRIPTION OF DRAWINGS.
Fig 1 is a front elevation. Fig 2 a side elevation shewing my improvements.
I apply a cylinder a which is hung on a stud b by means of the bracket c, such
stud b being attached to the framework d¹ of the photographic shutter. By this
arrangemont the cylinder a is capable of oscillation. Within the cylinder is
provided a piston e which is coupled by means of a piston rod f to a crank g on
the end of the flap spindle d referred to in the Specification of my Patent No 2767
dated 5th February 1884. At the end of the cylinder a I insert a hollow plug h
the inner end of which is covered by an india rubber piece i forming a chamber, to
the outer end of the plug is attached a tube j in connection with a pneumatic or
hydraulic ball k.
The piston e is in contact with the india rubber chamber or piece i, and such
india rubber chamber or piece i being expanded within the cylinder a by pressure
imparted by the attendant through the medium of the pneumatic ball k and tube j

page_text: forces the piston e outwards which through the medium of the piston rod f, crank
and Bap spindle & rotates or raises the flap and exposes the lens. On with-
drawing the pressure the india rubber chamber or piece i returns to its original
position allowing the piston e to return and the flap to close assisted by the
weighted lever m.
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 arrangement and application of cylinder a provided with the expanding
india rubbor chamber or piece i through the medium of which the piston e is
actuated for imparting the required motion to the flap substantially as and for
purposes herein set forth.
2° The combination of pneumatic ball k, tube j, with india rubber chamber or
piece i, cylinder a, piston e, piston rod f, crank g, flap spindle d, and flap of
photographic shutter, all arranged and operating substantially as and for purposes
horein set forth.
J. W. HARDING,
For the Applicant.