Year: 1887

page_text: Date of Application, 24th Sept., 1887
Complete Specification Left, 19th June, 1888
Complete Specification Accepted, 24th Sept., 1888
FREDERICK WOODWARD BRANSON Pharmaceutical Chemist 14 Commercial Street
Leeds do hereby declare the nature of this invention to be as follows:
:―
My invention has reference to improvements in photographic shutters for which
Letters Patent were granted to me April 17, 1886.
According to my present invention the object of which is to obtain portability I
make the upper portion of the framework of shutter only equal to about half the
length of that portion of the framework which is below the spindle.
The spindle is so arranged that the drop may pass freely under it at any position of
the flap of the shutter.
The cross piece or the drop is placed at some distance above the base of the drop
this arrangement ensures the presence of a portion of the drop in the framework of
shutter beneath & below the spindle.
I do not regard the weighted arm or pneumatic movements figured in Patent
No. 5386, 1886 as essential additions, one or both may be omitted.
FREDERICK WOODWARD BRANSON

page_text: FREDERICK WOODWARD BRANSON Pharmaceutical Chemist 14 Commercial Street
Leeds do hereby declare the nature of this invention & in what manner the same is to
be performed to be particularly described & ascertained in & by the following
statement:-
=
My invention has reference to improvements in Photographic Shutters for which
Letters Patent were granted to me dated 13th August 1884 No. 2767 & 5th July
1886 No. 5386.
In my present invention in order to gain portability when the shutter is closed I
reduce the dimensions of the upper part of the framework of the shutter to about one
half of the dimensions of the lower portion.
This improvement will be readily understood if my patent, No. 2767 is referred to
in which specification, the framework (a) is figured.
In the same specification fig. 5, the drop b is shown in section.
On the drop a cross piece attached to the base is shown in end section.
In my present invention this cross piece is not attached to the drop so as to
terminate with it but the cross piece is attached to the drop b. at about one fifth the
length of from its base. When the flap c is closed the drop is therefore brought
to rest in a position which allows the lower portion of b to pass under & below the
axis of the spindle which carries the flap c.
The axis of spindle & the attached flap c & also the thickness of drop b, are
adjusted so that, the whole of b, with the exception of the cross piece, passes freely
under the flap c, at any position of the latter, the result being that after the drop b, has
fallen the flap c may be brought down over it & thus a very portable piece of
apparatus results.
The before mentioned alterations are illustrated in the annexed drawings in which a
represents the framework of shutter b the drop. c. the flap. d. the spindle & e. the
cross piece. Fig. 1 & 2 represent a front elevation of the shutter when arranged for
an exposure of a photographic plate. Fig. 3 & 4 represent a side elevation after an
exposure has been completed & the drop b. has fallen to rest.

page_text: Having now particularly described & ascertained the nature of my Invention & in
what manner the same is to be performed, I declare that what I claim is :-
I. The general arrangement & combination of parts as are herein described.
II. The general arrangement & combination of parts as in claim I in conjunction
with weighted lever lettered c & d in Patent No. 5386 1886.
III. The general arrangement & combination of parts as in claim II in conjunction
with the pneumatic attachments as figured & described in my Patent No. 5386
1886.