An Improved Syphon for Use in Photographic and other Apparatus.
Year: 1888

page_text: Date of Application 27th July, 1888
Complete Specification Left 27th Apr. 1889-Accepted. 15th June. 1889
PROVISIONAL SPECIFICATION.
An Improved Syphon for Use in Photographic and other Apparatus.
I WILLIAM HARDING WARNER Gentleman of 3 Unity Street College Green in the
City and County of Bristol, do hereby declare the nature of this invention to be as
follows:-
The object of my invention is to manufacture an improved form of syphon-
particularly applicable to secure a constant flow of liquid from photographic washing
troughs, and other apparatus, but also applicable to many other useful purposes.
My invention consists of a central vertical tube attached to the vessel requiring the
apparatus by means of a flange or collar, and also by and in connection with, union
joints, flanges, nuts and washers, in the usual manner. Outside and enclosing this
central tube I fit an annular cap having suitable openings at the lower edge to admit
the entrance of water or other liquids. Below the vessel containing the fluids, I fit a
cock to the central tube, and near the bottom of the vessel I bore a hole in the central
tube. This hole constitutes an important feature in my invention. When the supply
cock is turned on, the water runs through the small hole attaining a uniform water
level throughout the vessel and apparatus and upon turning the waste tap the liquid
within the inner tube escapes downwards and induces a downward current which
carries with it the air in the cap or cover creating a vacuum and causing the liquid to
rise in the cap or cover and to overflow the central tube, which in conjunction with
the cap or cover, continues to act as a syphon and also acts as a pump raising the
water above the level of the surrounding fluid.
+
The vacuum may however he established by providing the apparatus with a second
and small tube within the central tube before mentioned this tube is similarly
perforated but with a smaller hole than that in the larger tube. The end of this
second tube fits within a hollow piston closed at both ends. Upon the level of the
liquid in the vessel reaching the hole in the second tube it flows in filling the piston
and sinking it by its weight and thus causing a downward suction within the tube and
drawing down the liquid therein and exhausting thereby the air container in the top
of the cap or cover in such case I fit the discharge pipe at the top of the apparatus and
construct it in the shape and upon the principle of a syphon with a tap at the
outer end.
In using my invention for some purposes it becomes necessary to prevent electrical or
galvanic action for which purposes I prefer to make the cap and tube or tubes, or one,
or both, or all of them of such materials as india rubber, vulcanite, ebonite, china or
stone-ware in other cases one or both or all of such articles may be made of metal.
The cap or cover may be kept in position by flanges and screws, or by a central screw
through the top entering a bracket upon or forming a part of the central tube or
it may be supported upon the crown of the central tube without being secured
thereto.
When using my invention for washing photographic plates or paper pictures the
chemicals are carried away by the lower strata of water entering the apparatus and
the plates are constantly subjected to the action of perfectly pure water.
Dated this 26th do of July 1888
E. J. COLSTON FEAR,
Agent for the Applicant.
Agent for the Applicant.
COMPLETE SPECIFICATION.
An Improved Syphon for Use in Photographic and other Apparatus.
I WILLIAM HARDING WARNER of The Hollies Clyde Park Redland in the City and
County of Bristol Landscape and Architectural Photographer do hereby declare the
[Price 8d1

page_text: 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 :-
The object of this said invention is to provide an improved description of syphon
which is especially applicable for use in photographic apparatus by reason of its
affording a constant flow and thorough change of liquid when fitted to troughs or
trays used for washing plates films prints and the like or for other useful purposes.
My invention consists of a vertical tube having near its lower extremity a flange
which is sunk into the bottom or floor of the trough or tray so that the upper surface
thereof is flush with the upper surface of the trough or tray the tube being continued
below this flange so as to pass completely through the said bottom or floor of the
trough or tray and having its lower extremity screwed to fit any convenient tap that
1 may fix thereon said tap having attached to it an outlet tube or pipe of suitable
material to lead away the waste water or liquid and this outlet tube or pipe I prefer to
be of a bent or curved form.
On one side of the vertical tube and close to the flange this being just above the
floor of the tray I form a small hole or orifice and at the top of the tube I form at
each side thereof arns meeting over the said tube and forming a seating or support to
carry either a fixed metal bell or cover which may be screwed or otherwise affixed
thereto or a loose cap or cover of glass, india rubber vulcanite or other desirable
material and sufficiently long to reach nearly or quite to the level of the bottom of the
hole at the lower part of the vertical tube.
Referring to the accompanying sheet of drawings and to the letters and figures of
reference marked thereon.
Fig. 1 shews an elevation and,
Fig. 2 a section of my improved syphon fitted to a tray for washing photographic
plates films prints or the like.
A is the vertical metal tube B the flange and Cthe screwed portion to receive the
tap D to which is attached the pipe E-F is the bottom or floor of the trough or tray
one corner of which is shewn in section G is the small hole or orifice H, H₁ the arms
at the top of the tube meeting and forming a support I and leaving thus an open
space JK is the glass bell or cover shewn in elevation by dotted lines and L the
space between edge of cap or cover K and the floor of trough.
The action of the syphon is as follows:-
The waste tap being closed and supply turned on the water or liquid flows through
the hole G filling the space in tube A between tap D and said hole G and attains a
level in tube A uniform with that of the liquid in the tray. When the said uniform
level of liquid is sufficiently high above G the lower part of the cap or cover is
hermetically sealed. On turning the tap D the water rushing down between the
space G D exhausts the air in cover K and the water at bottom of trough or tray rises
up to fill the vacuum inside of the cover and overflows down the tube A small hole G
keeping up the supply in the bottom of the tube A below the said hole G.
Fig. 3 shews a method of making the syphon in two parts and enables it to be used
in connection with any ordinary trough or tray by simply forming a hole therein of
proper size and avoiding the necessity of countersinking to receive the flange and in
this form of construction I form the vertical tube A without the collar or flange B
and I arrange a loose collar or flange B¹ having a tubular extension A¹ the inner face
of which is screwed or tapped to receive the lower part of the syphon tube A which
passes through it sufficiently far to receive the tap D which is then attached thereto.
It will be found that by use of this form of syphon an uniform and gradual flow of
water or liquid will be obtained from the bottom of the trough or tray which will
effectually clear off any deposition of chemicals or other diletenous matters.
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 :-
First. For use in photographic troughs trays and for like purposes A syphon
consisting of a vertical tube A with hole G arms H, H¹ with spaces J J' (or like

page_text: arrangements for permitting flow of fluids) and cap or cover K substantially as
described herein and illustrated by accompanying drawings.
Second. The improved construction of syphon as and for the purposes herein
described and illustrated in the accompanying drawing.
Dated this 27th day of April 1889.
POPPLEWELL, COLTON & Co.,
Agents for the Applicant.