US1176972A

US1176972A - Automatic flushing-valve.

Info

Publication number: US1176972A
Application number: US4502615A
Authority: US
Inventors: Stafford W Menzies
Original assignee: Individual
Current assignee: Individual
Priority date: 1915-08-11
Filing date: 1915-08-11
Publication date: 1916-03-28
Anticipated expiration: 1933-03-28

Description

S. W. MENZIES.

AUTOMATIC FLUSHING VALVE.

APPLICATION FHID Auem, 1915.

1,176,972. Patented Mar. 28,1916.

WXTNEEEES.

THE coLu1\\BlA PLANOuRAPI-I co.. WASHINGTON, D. c.

of Lambton, Province @FFTQEZ.

STAFFORD w. Menzies, or sen-ma, ONTARIO, oANAnA; 7

AUTOMATIC FLUSHING-VALVE.

ToaZZ whom it may concern:

Be it known that I, STAFFORD W. MEN- ZIES, of the city of Sarnia, in the county of Ontario, Canada, a subject of the King of Great Britain, have made certain new and'useful. ln'iprovements in Automatic 'FlushingValves, of which the following is a specification.

This invention relates to valves used as a substitute for flushing tanks, and my object is to devise a valve of this type which will not only be eflicient, but which will also be simpler, and therefore cheaper and less liable to get out of order than those at present known.

I attain my object by means of the constructions hereinafter described ancl-illustrated in the accompanying drawings in which- V Figure 1 is an elevation partly broken away showing my improved valve arranged in connection'with a service pipeand reservoir; Fig. 2 is a vertical section of the same closed; and Fig. 3 a vertical section of the same open.

1 lnthedrawings like numerals of reference indicate corresponding parts in the difierent figures. V

In Fig. 1, 1 is the service pipe which is connected with thereservoir 2. By means of the T-connection 3, a pipe 21 is connected with the service pipe, this pipe 21 being con nected with the flushing valve. 7 V Y The flushing valve comprises a casing 4 provided at oneside with a connection 5' whereby it is connected to the pipe 21 and at the other whereby it is connected with thebowl to be flushed. Between the two connections is formed a valve seat 7, which will be horizontal when the device'is in use, and. is provided with the waterway or port 8 which forms a communication between the inlet and outlet chambers provided by the connections 5 and 6. This waterway, it will be noted, is somewhat less in diameter than the interior of the body of the casing below and above it. p 1 e In alinement with the valve seat and above the same is formed the cylinder 9, which, by means of the opening 10, communicates with the interior of the connection 5. This openingyof course, also forms part of the passageway for water through the device when the valve is open. Within the cylinder is Specification of Letters Patent.

closed as shown in .19 which ,fit than the body of the nut. These enlargeside with the connection 6.

Patented Mar. 28,1916.

7 Application filed. August 11,1915. Serial No. 45,026.

loosely fitted a ,pistonll provided with the stem 12 which extends outthrough the under side of the casing, the stufiing box 13 being provided to prevent leakage.

The upper end of the cylinder is closed by 3 the screw cap 14 which is provided with the washer 15 to make a watertight fit. The piston is provided with the washer l6 adapted to rest on the seat 7 when the valve is Fig. 2. The washer 16 is held in place by means. of the nut 17 screwed on the stem 12 and constituting a throttling member. This nut is of peculiar shape as shown, which shaping fills a very important function in the operation of the device. The nut, as will be seen, is of such length that when the piston is raised as shown in Fig. 3, the lower edge of the throttling member is just above the valve seat. The nut orthrottling member, it will be seen, at all parts of its length forms a very loose fit in the port 8, but at its opposite ends it is provided with the enlargements 1S and the waterway more closely ments in length are each approximately equal to the depth of the waterway 8.

The piston is moved by means of the lever 20 pivotally connected with the lower end of the valve stem and fulcrumed on the casing of the valve by means of the pivoted link 22.

The operation of the device is as follows: lVhen it is desired to flush the bowlwith which the device is employed, the lever 20 is raised. The space above the piston 11 is filled with water. as it is exposed to pressure within the service pipe through the narrow space between its inner wall and the periphery of the piston. While the lever is raised thewater flows down around the outside of the piston. W hen the piston is fully raised, there is a free How of water through the device. It now the lever be released, the weight of the parts tends to draw down the piston to bring the washer 15 on to its seat. This movement is necessarily slow owing to the comparatively restricted leakage past the piston and sufiicient flow is thus maintained'for a sufiicient period of time to efi'ec tively flush the bowl.

As the lower enlargement 19 on the nut reaches the waterway 8, the flow is greatly restricted. This allows the syphon action to empty the trap, which, of course, is always used in connection with the bowl.

due to water hammer which is commonly found with flushing valves of this type. Much trouble is also experienced with piston valves used in connection with such devices owing to the cutting action of sand which is so commonly found in city water supplies.

To overcome this difficulty I providecircular grooves in the piston and find that I thus overcome the trouble, as a space is thus provided'in which grains of sand may be caught instead of grinding between the opposed surfaces. From their lodgment in the grooves these grains of sand are ultimately washed when the device isused.

It-is preferable to cut the grooves spirally as shown in Fig. 8, as sand lodging in a groove near the top may thus gradually travel downward through the groove and escape at the bottom.

A considerably better effect is obtained if grooves are also formed in the cylinder. These are preferably spiral. Assuming the grooves in the piston to be a right hand spiral, the grooves in the cylinder are pref- .Oopies of this patent may he obtained for five cents each, by addressing the Washington, D. C.

erably a left hand spiral. These grooves also afford restricted leakage pastthe piston.

What I claim as my invention is: r

A valve casing having an lnletchamber,

an outlet chamber, and a port connecting said'chambers;-a valve seat surrounding saidport at the inlet side thereof; a cylinder formed in alinement with said-seat and above the same; a pistonloosely fitted in said cylinder; a valve washer carried by said piston adapted to seat on the valve seat aforesaid; a stem on said piston extending downward through the casing; a throttling member forming a downward extension from the piston, said throttling member being of materially less cross-sectional area than and normally extending below said port and having at its end adjacent the washer an enlargement to ne'arly close the port when the washer is almost down to its seat, said throttling member also having a second enlargement at its lower end, said second enlargement lying below the port when the valve is closed and entirely above the port when the valve is fully. open; and a stuffing box on the casing throughwhich the said stem passes. V Signed at Sarnia this 30th day of July, A. D. 1915, in the presence of the two undersigned witnesses. I

STAFFORD 'W. MENZIES; V Witnesses: CARRIE NLMENZIES, ALBERT S. MACKLIN.

Commissioner of Patents,