USRE14150E - John shanks - Google Patents

Description

.I. SHANKS COMBINED VALVE AND SIPHON.

APPLICATION FILED 3AN.22.I916.

Reissed June 13, 1916.

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JOHN SHANKS, OF BARRHEAD, SCOTLAND.

COMBINED VALVE AND SIPHON.

Specfication of Beissued Letters Patent. Reissued J 13 1916 Original No. 1,090,885 dated March 24, 1914, Serial No. 755,190. Application for reissue filed January 22, 1916. Serial No. 73,741.

To all whom z't may concrn:

Be it known that I, JOHN SI-IANKS, a subject of the King of the United Kingdom of Great Britain and Ireland, and residing at Bari-head, Renfrewshire, Scotland, have invented a certain new and useful Improvement in Combined Valves and Siphons, of which the following is a specification.

This invention relates to a combined valve and siphon particularly designed for flushing tanks of water closets, urinals and the like, and has for its general object to provide a device whereby siphonic action will be initiated automatically and which may be enployed formanual actuation, while insuring that in the latter case operative conditions are not disturbed by actuation of the device prior to the cistern having been entirely filled.

In the accompanying drawings Figures 1,

2 and 3 are vertical sections of flushing tanks equipped with alternative Constructions of devices embodying the invention; Fig. 4 shows a detail hereinafter refet-red to; Fig. 5 `is a diagrammatic view illustrating the operation of the device.

Referring particularly to Fig. 1, Secured to the bottom of the fiushing tank 1 is an outlet connection 2 including a tubular portion afiording a valve seat 3, said tubular portion being surrounded by an open-Work structure l arranged to Permit passage of water. The structure 4 serves to support a superposed casing 5 between which and the upper end of said structure is interposcd a diaphragm 6 of leather, rubber or other suitable material constituting a valve adapted normally to engage the seat 3. Secured to the diaphragm 6, and disposed substantially coaXial with the outlet connection 2, is a pipe connection 7 which uprises within an upwardly also co-axial eXtending portion S of the casing 5 to a point adjacent to the upper closed end 5 of said portion 8, and is preferably provided at its upper extremity with a suitably supported cap' 9 arranged so as to aflord a narrow substantially annular opening 10 through which the overfiow water passes, as hereinafter described. The pipe connection 7 also passes downwardly through. the diaphragn 6 to a convenient point beneath the seat 3 and preferably terminates at its lower end in a fiared portion 11 which tends to spread the overfiow water as it passes into the discharge pipe 12.

The diaphragm 6 is preferably provided at its upper face' with a disk 13 which serves to maintain the diaphragm on its seat 3 and is equipped with projections 14 which engage with the inner face 15 of the superposed casing 5 and permit water to pass between the disk 13 and the casing, when the diaphragm 6 is raised off its seat 3, said casing 5 being formed with a small aperture 16 for the admission of Water thereto.

It will be understood that on the inflow of water into the tank `l, water will pass through the open-work structure 4 and through the aperture 16 in the casing 5, thus equalizing the pressure on the diaphragm 6 which is held on its seat 3 by the weight of the pipe connection 7 and other parts connected thereto, and that water will rise in the upwardly extending portion 8 of the casing 5. The water having risen to the upper'edge of the inner pipe 7 is caused to move upwardly along the concave surface of the cap 9 by capillary action, as indicated in Fig. 5, and passes downwardly over the upper edge of the pipe. By the provision of said cap the stream lines of the water are caused to approach the axis of the pipe, so that, the pipe 7 being of relatively small diameter, the crosssectional area of the bore is entirely filled by the water in its downward passage, thereby initiating siphonic action. The size of the aperture 16 is such that although the water will rise within the pipe 8 at approxmately the same rate as the water level in the cistern or tank 1, on the latter being filled at the usual comparatively' slow rate,

sage over the edge 3 of the pipe 12, and' the contents of the tank Will be rapidly drained.

The above described Construction, Which is automatic, is applicable to tanks of the overhead type and to tanlgs of the so-called low-down type, and can be adapted for manual actuation, for instance, in the case of a tank of the low-down type, Fig. 2, by the provision of a device which may take the form of a piston 17 Working in an auxiliary casing 18 communieating by means of a branch 19 With the superposed casing 5 so that on movement of the pisten 17, as by means of a push button 18& fitted directly on the tank, and a bell-crank lever 20 and rod 21, a small Volume of'fluid may be impelled upvvardly within the extension 8 of the superposed casing 5 and the siphonic action be established.

In another modification, Figs. 3 and 4:, applicable more particularly to tanks of the overhead type, the siphonic action is established manually by means of an auXiliary supply of Water introduced to the superposed casing 5, for instance, through the intermediary 'of piping 22 led from a suitably ineased holloW flexible member 23 adapted' to be acted upon as by means of a push button 24 within convenient reach of the operator.

In the constructions last described, even ifthe apparatus be operated before the cistern is entirely filled With Water, the Water level inside the pipe 8 Will not be perma nently afl'ected', so'that, on the Water assuming its proper level in the cistern, the entire device Will be ready for' repeated manipulation.

From the foregoing it Will be understood that the pipes 7 and 8 together form a siphon of which the pipe 8 isthe intake member and the pipe 7 the discharge member. It ill alsoybe nnderstood that the opening or lifting. of the diaphragm valve is due to the fact that the discharge member of the siphon is of greater Capacity than the Capacity of-the restricted aperture 16 serving as' the inlet to the chamber of the casing 5; so that When the siphon is started, whether manually or automatically, the Water pressure on` the upper side of said diaphragm valve Will be less'ened by siphonic suction, and the greater Water pressure on the lower side of said valve Will cause said valve to be lifted OI: opened and* to remain in such position ,until the ta'nl 'is nearly emptied, When the said valve Will resume its seated. or closed position by its' Weight and the vveight of the parts which it supports.

What I claim is l. The combination With a tank having an outlet provided With a valve seat, of a casingwthin said tank having a` closed` upward extension and provided With means for admitting fluid thereto, a valve coperating With said valve seat and exposed to the fluid pressures in said tanl and casing respectively, and a siphon pipe carried by said valve, and arranged coaXial With said extension, and communicating with said outlet.

2. The combination With a tank having an outlet provided With a valve seat, of a casing within said tank havin-g a closed upWard eX-.

lower end 01: said casing and constituting a valve coperating With said valve seat, and a siphon pipe carried by` said diaphragm and arranged 'coaXal With said extension, and communicating With said outlet.

4, The combination With a tank having an outlet provided With a valve seat, of a casing vvithin s a-id tank having a closed Upward extension and provided With means forad'- mitting fluid 'thereto, a valve' coperating With said valve seat and eXposed to the fluid pressures in said tank and casing respectively, and a siphon pipe carried by saidvalve and' arra nged coaXial With said extension, and' communicating With'said outlet, said siphon pipe being provided at its upper end With a cap arranged to afiord a narroW opening between the same and the end of said pipe.

5. The combination With a tank having an outlet provided With a valve seat, of a casingin said tank having a restricted inlet apertureto its chamber, `a diaphragm valve closing the bottom of said chamber and also normally closing the chamber of said tank to said outlet, and a sphon the inlet member of which communicates With the chamberof said casing and the outlet member of Whioh siphon is of greater capacity than the capacity of said restricted inlet to said' lastnamed' chamber; Whereby When the siphon is started said valveWill be opened and fluid be discharged from said tank, and the said` valve then be automatically closed.

6. The combination With a tank having an outlet provided With a valve seat, of' a cas ing in said tank havinga restricted inlet aperture to' its chamber, a diaphragmi valve closing thebottom of said chamberand also normally closing the chamber of' said tank to said outlet,- anda siphonthe inlet member of `vvhich communicates With thechamberof said easing and the outlet member of which siphon is of greater Capacity than the capaety of said restricted nlet to said lastnamed chamber, said daphragm valve comprsng a disk provided on its upper side with projections to mpnge against the inner Wall of said casng and. thus prevent the JOHN SHANKS.

copie o! thl patent may be obtained tor five cents each, by addressing the Commissioe' ot Patents, Whingto, D. c."

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