An Improved Support for Focussing Cloths and Screens for Photo- graphic and other Lenses.
Year: 1899

page_text: Date of Application, 1st Aug., 1899
Complete Specification Left, 1st May, 1900-Accepted, 28th July, 1900
An Improved Support for Focussing Cloths and Screens for Photo-
graphic and other Lenses.
CHARLES THOMAS BILBIN, 75, Abbey Foregate, Shrewsbury, Photographer, do
hereby declare the nature of this invention to be as follows:-
A is a hollow tube into which rod B slides the rod B being kept in position
by the keeping screw C, the rod B being supplied with a hole J at the extremity
for the admission of a wire cord or rod S. The tube A is pivoted or hinged to
the slab K at the point D. F is a keeping sheath which is pivoted under the
milled screw G. H is a metal slab with two or more holes I through which
screws pass for fixing. A ball and socket joint may be placed beneath the keep-
ing screw G to regulate the tube A & bar B.
In operation the tube A being brought down into its socket K is kept in
position by the keeping sheath F the screw G being tightened to prevent the
keeping sheath F from movement. The metal or other slab H is provided
with two or more holes through which screws pass for securing the fixed
appliance to the side top front or any other portion of a photographic camera or
other apparatus.
The tubes B and rod S can be reversed and used for forming a screen
to support cloth when focusing, or camera can be fitted with duplicates either
in the form of a bar or tube. When used as a focusing screen the metal slab H
can be attached to the side or top of back of camera at T. When not in use for
either purpose the brass bars or tubes A B drop over the top of camera either in
front or at back by releasing the milled screw G and the keeping sheath F.
Dated this Twenty-eighth day of July One thousand eight hundred and

page_text: performed, to be particularly described and ascertained in and by the following
statement: :—
The appliance can be made in the form of a solid bar rod or tube of brass or
other suitable material and can at the option of inventor be in either of the
following forms. Drawing Fig. 1, Provisional Specification A is a hollow
tube into which B slides. The rod B being kept in position by the keeping
screw C. The rod B being supplied with a hole J at the extremity for the
admission of a wire, cord or rod S. The tube A is pivoted or hinged to the slab K
at the point D. F is a keeping sheath which is pivoted under the milled screw G.
His a metal slab with two or more holes, I, through which screws pass for fixing.
A ball and socket joint may be placed beneath the keeping screw G, to regulate
the tube A and bar B. In operation the tube A being brought into its socket K,
is kept in position by the keeping sheath, F, the screw G being ‘tightened to
prevent the keeping sheath F from movement.
The metal or other slab H is provided with two or more holes through which
screws pass for securing the fixed appliance to the side top front or any other
portion of a photographic camera or other apparatus. Drawing (Figs. 1 & 2 of
the Complete Specification), A is a bar composed of brass or other suitable
material. B is another bar of brass or otherwise, each being provided with any
equal number of holes in the centre and opposite each other at convenient
distances.
.
The bar A is hinged or pivoted to the slab I at the point D. F is a keeping
sheath. E is a keeping screw. G is a brass or other slab provided with two or
more holes for screws to pass through for fixing purposes.
In operation the sheath F being brought over the hinged or pivoted portion
of bar A at the point D keeps this rigid when the milled screw E is tightened.
The hinged portions at D and C are both stop. The holes in the centre of bar A
and B at equal distances are for the purpose of putting a wire or rod through
to support a cloth or other material to form a screen, and when the distance from
the lense is required for short or wide angle lenses the bars A and B are folded
together to get the desired length of screen.
Slab G is provided with two or more holes through which screws pass for
securing the fixed appliance to the side front top or any other portion of a
photographic camera or other apparatus.
The fixed appliance can be arranged to any angle required, by loosening milled
screw G (Fig. 1 Provisional Specification) or E (Fig. 2 Complete Specification)
thereby keeping cloth or screen out of angle of lense.
The tubes of brass aforementioned can be reversed and used to form a support
for cloth when focussing, or camera can be fitted with duplicates either in the
form of a rod, bar or tube. When used as a support for focussing cloth the
metal slab H (in Fig. 1 Provisional Specification) or G (Fig. 2 Complete Specifi-
cation) can be attached to the side or top of back of camera at T. When not
in use for either purpose the brass rod or tube A, B drop over the top of camera
either in front or at back by releasing the milled screw G (Fig. 1 Provisional
Specification) or E (Fig. 2 Complete Specification) and keeping sheath F.
Two sheets of the drawings referred to are left with the provisional, and one
with the Complete specification.
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:―
No. 1. The aforesaid either in the form of Fig. 1 (Provisional Specification)
or Fig. 2 (Complete Specification) to form a support for a cloth or screen to
shut off all exteranious light from lenses attached to a photographic camera,
or other appliance either by direct or reflected light striking into any portion
of the aforesaid lense.

page_text: No. 2. To use the aforesaid either in the form of Fig. 1 (Provisional Specifi-
cation) or Fig. 2 (Complete Specification) to form a support for cloth when
focussing thereby preventing the same from unduly resting upon operator, when
engaged, thus enabling him to perform the same with greater ease.
Dated this Twenty-ninth day of April One thousand nine hundred.
CHARLES THOMAS BILBIN.