On 16th November the following year, he submitted another patent application. This time improving on the system he patented the previous year. The patent application (No. 1881/5023), which went by a rather loquacious title “Improvements in Apparatus for Charging the Syphons sometimes used for the Supply of Water from Cisterns to Water-Closets and Urinals, which Improvements are also Applicable in whole or in part t0 other Purposes for which Syphons are Used”, was successful and finally sealed on 16th May 1882.
The following is an extract from the patent application: –
My Invention is applicable to siphons which may be used for a variety of different purposes, but more particularly to those used for flushing water closets, urinals, wash basins, and such like purposes.
For such purposes the arrangement in which my Invention is embodied consists essentially of three parts
1, A cistern; 2, a syphon ; 3, a vertical tube or vessel hereinafter called the receiver.
Since filing my Provisional Specification I have found that the check valve which I proposed to place at the bottom of the receiver is unnecessary, and. therefore I have omitted it from this Specification
The cistern is shown at A, Figures 1, 2, and 3; it may be of any suitable shape, dimensions, and maieria1, such as those in common use for similar purposes, and is provided with a ball cock or other means of filling it to any given water line in the usual way.
The syphon is shown at B. Figs. 1, 2, and 3; it may consist of metal or any other suitable material, and be of any convenient section, and should be of equal or nearly equal bore throughout. I prefer however to make it of cylindrical section at the point where the longer leg passes through the cistern or is on a level with the floor of the cistern, and to make the bend and the shorter leg somewhat flattened vertically, but of the same sectional area as shown in Figs. 1, 2 and 3.
The short leg of the syphon extends nearly to the bottom of the cistern, and the bend is so placed that its under surface is at or a little above the water line. The extremity of the short leg is at a11 times in free communication with the cistern so that the water stands at the same level in both till the mechanism hereunder described is brought into actions.
The receiver is shown at C, Figures 1 2, 3, and 4 ; it is this vessel that contains my improvements It is constructed of metal or other suitable material, and may be of a cylindrical or any other desired section, and should be of equal or nearly equal bore throughout.
It is open at the top, and has two lateral orifices C and C1 at or near the bottom C forms a communication with the short leg of the syphon, and C1 with the cistern.
The top of the receiver must be above the water line, and its sectional area must be greater than that of the syphon, and as it is at all times in free communication with the cistern and the syphon the water will stand at the same level in it as in them till disturbed by the action of the mechanism shortly to be described.
The object of the receiver is to provide a means by which the level of the water can be raised over a confined and comparatively small area only, and a head of water thus created by the downward pressure of which the water is caused to rise the syphon till the bend is filled and the action of the syphon commences.
This may be effected by several different contrivances, two of which I now proceed to describe.
In Figures 1 and 2, D is a vessel of a cylindrical or other suitable shape of metal or other suitable material.
It is of 1argr sectional area than the receiver, open at the top and with an aperture in the bottom of corresponding shape, but larger dimensions than the receiver; so that when it is caused to slide upon the latter it fits only loosely upon it. When D is down nr in the position shown in Figure 2 water flows into it through the space between its bottom and the wa1l of the receiver, till it stands at the same level as in the cistern. The inward flow of water may be assisted if desired by piercing the sides of D with small holes.
The vessel D is connected by suitable mechanism, such as the well-known contrivances in common use for similar purposes with a handle, the action of which when pulled or lifted by the operator is to raise D quickly, lifting the bulk of the contained water with it, arid discharging it into the upper end of the receiver C, thus temporarily raising the level of the water in the latter arid creating a downward pressure, and a consequent flow of water from the receiver into the syphon, which thus becomes charged and begins to act, and this happens in spite of the fact that there is an opening C1 into the cistern unprotected by a valve in order however to guide the flow of water as much as possible in the desired direction. I prefer to shape the lower part of the receiver as shown in Figs. 2 and 3.
The capacity of the vessel D must be such contain a supply of water sufficient for the above mentioned purpose.
When the office of the vessel D is thus accomplished, and the handle is released by the operator, it falls back into its original position by its own weight, where it rests upon stops or studs provided for the purpose. If desired this can be facilitated by placing a weight at the end of the lever L.
The syphon being thus charged and brought into action a flow of water immediately sets in through the opening C1 from the cistern into the syphon, which continues till nearly the whole contents of the cistern have been discharged.
The object therefore of the receiver C is merely to charge the syphon. When that is accomplished the water flows direct into the syphon from the cistern, and not over the top of the receiver.
Figures 3 and 4 show an alternative method of charging the syphon. E is a float, which my consist either of wood or of a hollow vessel of metal or other suitable material closed at the bottom. It is of similar shape to the receiver, but smaller in sectional area than the bore of the receiver, so that when it is lowered into the latter an annular space is left between the two.
When the cistern is to be emptied the float E is forced into the receiver C by the action of suitable mechanism. The water in the receiver rises by displacement to a point higher than the level of the syphon bend, and consequently rises also in the syphon till the latter is charged, and begins to act when a flow of water sets in as before described through the orifice C1, and the cistern is discharged.
When the float E has performed its office it rises to its first position by its own buoyancy or by suitable mechanism, or by a combination of the two.
The receiver may also be charged by hinging to it a simple elevator, which dips in the water of the cistern when at rest, and which when raised by the action of a lever or its equivalent turns upon. its hinge, carrying with it a measured quantity of water until it is high enough to deposit its contents into the top of the receiver
In order to prevent waste of water through the handle being held by the operator longer than is necessary to chare the syphon I adopt a contrivance described by me in my Specification, No. 1745, 1880, page 3, and there called an “adjustable stud or catch pin,” the action of which is to prevent the ball H of the ball cock from falling till the release of the handle allows the charging vessel D to fall also. This is effected by fixing a stud or pin p, Figs. 1 and 2, to the said vessel D in a position immediately under the lever h of the ball cock, so that the said lever is held up as long as the handle is held by the operator, and water is thus prevented from flowing into the cistern.
In order to prevent waste of water through the opening of the ball cock before the cistern is empty I adopt a contrivance, a1so described by me in the above mentioned Specification, pages 3 and 4, and there called a “self-acting balance weight,” the construction and action of which is as follows :
In Figures 1 and 2, G is an open vessel suspended from one end of a beam K, the other end of which is connected with the ball H of the ball cock. G is of such capacity as to bold when full a quantity of water more than sufficient to counterbalance the weight of H. In the bottom of G is a hole, the size of which can be regulated in any desired way.
So long as the cistern is full G is under water, and when the cistern is discharged G temporarily retains its contents, which being heavier than H the latter is prevented from falling, which it would otherwise do. The cock therefore remains closed till enough water has escaped through the aperture in the bottom of G to allow the fall of H. By regulating the size of the said aperture the time during which the cock remains closed after the emptying of the cistern may be exactly fixed. This self-acting water balance weight is equally applicable, with certain slight modifications, to the arrangement shown in Fig. 3; the vessel G however is not there shown.
For certain purposes, as when a portable syphon is used for drawing off the contents of a cask, I dispense with the charging vessel and mechanism above described, and charge the syphon by hand, either by pouring liquid into the receiver from a suitable vessel or by displacing the liquid in the receiver by a rod or other contrivance similar in principle to the displacer shown in Figures 3 and 4.
As the charging of the syphon does not depend upon a vacuum, there is no atmospheric resistance to overcome, and as flow is as uniform from first to last as though it was due to valve.
Having now described my Invention, and the manner of performing the same, I wish it understood that what I claim and desire to protect under the hereinbefore in part recited Letters Patent is, –
First. The charging of a syphon and bringing it into action by creating a head of water in an adjoining vessel in free communication with the syphon, said vessel being such as above described as a receiver or its equivalent, which vessel is of small sectional area compared with the cistern which contains it, substantially in the manner above described and illustrated
Second. In siphons which are thus charged and brought into action the employment of an orifice without a valve at or near the bottom of the receiver or its equivalent, and communicating with the cistern or other vessel containing the liquid to be drawn off by which orifice the liquid flows to the syphon as soon as the latter is charged and begins to act, substantially in the manner above described and illustrated.