US 2632180 A
Description (OCR text may contain errors)
March 24, 1953 J. PEGLER 2,632,130
FLUSHING CISTERN Filed March 27, 1951 2 SHEETSSHEET 1 IT I! l/Illl/ inventor e]. L. Peylep JIM Patented Mar. 24, 1953 UNITED STATES PATENT OFFICE 2,632,180 FLUSHING cis'r'iiRN Joseph Leslie Pegler, Beecroft, near Sydney, New South Wales, Australia, assignor to Lockair lty Limited; Sydney, New South Wales, Australia, a corporation of New South Wales Application March '27, 1951, se ial No. 217,707 In Australia December 15; 1950 7 Claims. 1
This invention relates to cisterns of the type that are adopted for the flushing of water closets and the like.
The modern trend is to adopt cisterns of the low-level type; that is to say the kind which can be installed conveniently just above and to the rear or side of the toilet bowl; Such a location has the advantage that they can be attended to conveniently when any adjustment is necessary; it effects a saving in the length of piping for feed ing flushing and draining purposes, and at the same time allows of a cistern being let into the wall of the closet at a convenient height.
These low-level cisterns are usually operated by a short hand lever, or the like, but some of the better class cisterns are operated by a pushbutton set in the wall of the closet close to the toilet bowl.
The present invention has reference more particularly to low-level cisterns of the type operated by a push-button though it is applicable also to cisterns of the overhead type operated by such means; and in some cases the cistern may be perated by a hand controlled valve instead of a push-button. 4
Primarily the invention aims at providing a flushing unit which can be fitted into a reservoir intended for an overhead or low-level cistern and which, if desired can be substituted for the existing flushing means, should such means prove unsatisfactory in use,
According to a preferred practical application of the invention as suitable for an overhead or low-level cistern of the push-button type the aforesaid unit comprises, in the main a flushingbell intended to be supported over the orifice in a discharge fitting in the floor of the reservoir, a float-valve movable Within said bell and designed to keep said orifice normally closed; and, exteriorly of said bell and in communication therewith, means for providing a water-seal, means for reforming said water-seal after each flushing operation, and means for initiating said flushing operation. 7 g H In order howeverthat the invention may be fully understood and readily carried into practical effect reference is now made to the accompanying drawings wherein:
Figure 1 shows a longitudinal vertical section of a cistern embodying the improved flushing unit in its preferred form and as arranged for operation by a push-button; A
Figure 2 shows a sectional plan of the outlet fitting of the cistern, taken on the horizontal plane 2-2 of Figure l; and
Figure 3 is an enlarged central vertical section 2 of the flushing unit appearing in Figure 1, the float-valve therein being illustrated in elevetion.
The cistern illustrated is suitable for installation at either a high or low level;
The flushing-bell It) can consist of a device much in the form of an inverted cylindrical canister, and in the example illustrated is supported by arms ll cast integral with the discharge fitting l2. The flushing-bell I0 is thus held with its mouth I3 a little above the fioor of the reservoir M. The discharge fitting I2 is secured in said floor by means of nut 15, a resilient washer It being interposed between flange ll of the discharge fitting l2 and the floor of the revervoir It.
Alternatively, in an arrangement not illustrated, the flushing-bell I0 could be supported by feet designed to stand upon and be secured to the floor of the reservoir I4, or said flushing-bell I0 could have a plurality of relatively large apertures formed in its wall near to its mouth l3 and have the rim of its mouth l3 afiixed to the floor of the reservoir l4;
One or more air admitting holes I8 (Figure 3) are provided near the mouth l3 of the flushingbell l 0 to facilitate operation of the flushing-unit in a manner clear from the following description.
Within the flushing-bell I0 is a float-valve 19 which can be inthe form ofan airtight canister loaded with ballast of any convenient type, or sufficiently heavy initself, and this float-valve I9 has ailixed to its bottom a valve head 26 intended normally to be held closely on seat 24 of the discharge fitting I2 under weight of the fioatvalve I9, there to effectively prevent contents of the reservoir I 4 from flowing down said fitting until flushing is implemented. 7
Exteriorly of the flushing-bell [0 there is a twopart cup 22 constituting a receptacle 23 and a compartment 24 (see Figure 3). This compartment 24 is placed in communication with the upper regions of the flushing-hen It by means of a tube 25. The compartment 24 is also in communication with limb zli of a vertical U tube 27 the other limb 28 of which terminates at or about the normal water level in the reservoir M, which level is indicated by the broken line 29 in Figure 1.
Also in communication with the compartment 24 there is a vertical tube 30 which depends almost to the bottom of reservoir l4 and is there closed. Within this tube 30' there is a refilling tube 3| which extends fromthereceptacle 23 to the lower precincts of tube 30. This tube 3!] together with receptacle 23 serves as a trap to retain suificient water to re-establisli a water-seal in the U tube 21 after each flushing operation.
The limb 28 of U tube 21 preferably has a crimped wire 32 in it. In practice it has been found that such a wire will prevent the formation of an air lock in limb 28. Connected to limb 28 there is a tube 33 which extends upwards and over or through the wall of reservoir [4 from which it is led downwards to a wall-fitting (see Figure 1) including a push-button 3d and diaphragm 35 as provided in existing installations or the push-button type.
It has also been found in practice that the presence of a small bleed-hole (not shown) in limb 28 just below the maximum water level in reservoir it, tends to facilitate operation of the invention.
Filling of the cistern is preferably under control of a ball-float valve of the usual type and not indicated in the accompanying drawings.
Operation of the invention When first installed it is necessary to form a water-seal in the U tube 27 and to fill the trap, constituted by the vertical tube 30 and the receptacle 23, by priming the refilling tube through the medium of receptacle 23. When this has been done the cistern is ready for operation.
As water enters the reservoir [4 through the usual float-controlled valve (not indicated) it the watercompresses air in the flushing-bell l while float-valve l9 remains seated under its own weight.
The water, continuing to rise in reservoir It, then completely fills receptacle 23 and ultimately reaches the maximum level determined by the aforesaid usual float-controlled valve.
While the water is rising in reservoir [4 and compressing air in the flushing-bell (0 it necessarily depresses the column of water in limb 26 of U tube 21. This means that a column of water is forced upward in limb 28 of U tube 27.
Now when diaphragm 35 is pressed inwards under pressure of push-button 34 it forces water out of tube 33 into limb 23 of U tube 21 causing the level of water in limb 28 to rise. Some of this water will be ejected into reservoir I4 through the extremity of limb 2S.
Immediately pressure on push-button 34 is released water will be sucked into tube 33 and consequently the level of water in limb 28 of U tube 21 would tend to drop slightly. As soon as this occurs the main body of water in the reservoir M will exert its superior force and, through the medium of air compressed in flushing-bell IE will eject water from the U tube 21 into reservoir This allows air entrapped in flushing-bell I4 to pass down through tube 25, through compartment 24 and thence down limb 26 and up through limb 28 to atmosphere, forcing water in U tube 21 ahead of it. As the air entrapped in flushingbell [0 thus escapes water will rise rapidly in said bell, lift float-valve 19 from its seat 2| and allow the main body of water in reservoir M to flow through discharge-fitting 52 say to a sanitary bowl below.
As the level of water receding in reservoir [4 approaches the mouth I3 of flushing-bell I!) air forces its way through holes l8 and rising to the upper precincts of the bell H3 allows the water to be discharged therefrom.
Concurrently with the flushing operation, as just explained, water in the receptacle 23 will fiow down refilling tube SI and then up through tube 30 into compartment 24 of cup 22, and from there it will flow downwards again into U tube 2'! thus re-establishing the water-seal therein in readiness for a subsequent flushing operation.
In an alternative construction of the improved flushing unit (not illustrated) the cup 22 may be arranged in limb 28 of U tube 21. In this alternative form there would be a bleed-hole in limb 28 in the lower regions of cup 22 and another bleed-hole in limb 28 just below the bottom of the cup. This alternative construction would allow the refilling tube 3| and tube 30 to be dispensed with.
Also in some cases the push-button 34 with its diaphragm 35 and associated pipe 33, together with the refilling and sealing means could be eliminated by fitting a small control cock on the upper extremity of a tube communicating with the upper regions of the flushing-bell I0.
1. A flushing unit for water closets and the like comprising a discharge fitting intended to be secured in the floor of the reservoir of a cistern, a flushing-bell supported over said discharge fitting, a float-valve within said flushing-bell and arranged normally to prevent the passage of water through said discharge fitting, a cup supported exteriorly of said flushing-bell and comprising a receptacle with a compartment below, a pipe establishing communication between said compartment and the upper precincts of said flushing-bell, a U tube having one limb in communication with said compartment and its other limb projecting above the mouth of said cup, and means for breaking said water seal by expelling water from said other limb.
2. A flushing unit for water closets and the like as claimed in claim 1 characterised in that said cup is constructed in two separable parts, the upper of which constitutes said receptacle.
3. In a flushing unit for the cisterns of water closets and the like wherein air entrapped in a bell over a discharge fitting in said cistern is prevented from escaping by a water-seal established exteriorly of said cistern, means in the form of a receptacle and two concentrically mounted vertical tubes for entrapping sufiicient water to re-establish said water seal after each flushin operation.
A flushing unit for water closets and the like comprising a discharge fitting intended to be secured in the floor of the reservoir of a cistern, a flushing-bell supported by and over said discharge fitting, a weighted float-valve within said flushing-bell and arranged normally to prevent the passage of water through said discharge fitting, a priming cup supported exteriorly of said flushing-bell and comprising a receptacle with a compartment below, a pipe establishing communication between said compartment and the upper precincts of said flushing-bell, a U tube having one limb in communication with said compartment and its other limb projecting above the mouth of said cup, means depending from said cup for providing a water seal in said U tube, and a push-button and diaphragm exteriorly of said reservoir in combination with a tube connected to said other limb for expelling water from said other limb and thereby breaking the water seal in said U tube.
5. In a flushing unit for water closets, as claimed in claim 4, a crimped wire in said other limb of said U tube to prevent the formation of an air lock therein.
6. In a flushing unit for the cisterns of water closets and the like, a single flushing-bell supported over a discharge fitting in said cistern, 9.
float-valve contained within said flushing-bell and arranged normally to close said discharge fitting, a water-seal including a priming cup supported exteriorly of said flushing-bell to prevent escape of air from the latter, said priming cup having a lower compartment in communication with the upper precincts of said flushing-bell and means for re-establishing said water seal automatically after each flushin operation.
7. A flushing unit for water closets and the like comprising a discharge fitting intended to be secured in the floor of the reservoir of a system, a flushing-bell supported over said discharge fitting, a float-valve Within said flushing-bell and arranged normally to prevent the passage of water through said discharge fitting, a cup supported exteriorly of said flushing-bell and comprising a receptacle with a compartment below, said cup being constructed of two separable parts the upper part of which constitutes the receptacle while the lower part cooperates with the bottom of the first part to provide the compartment, a pipe establishing communication between said compartment and the upper precincts of said flushing-bell, a U tube having one limb in com- REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 926,155 Walls June 29, 1909 FOREIGN PATENTS Number Country Date 356,069 Great Britain Sept. 3, 1931 364,292 Italy Oct. 27, 1938