US1720819A - Test t. - Google Patents

Description

F. COHEN July 16, 1929.

TEST '1 Filed Oct. 4, 1927 INVENTOR FRANK COHEN i r// III! www- A TTORNEY Patented July 16, 1929 UNITED STATES FRANK COHEN, OF BROOKLYN, NEW YORK.

TEST T.

Application filed October 4, 1927. Serial No. 223,861.

The invention relates to a test T of the type which is designed to be installed in the drain pipes of buildings, between the house pipe and the outlet to the house trap, normally constituting part of the drain system and adapted to provide means for shutting off the conduit and'permit the filling of the house pipe with water for testing purposes.

In devices of this character now in general use, means are provided for introducing into the conduit, various forms of complicated valve structures usually of the screw valve type and wherein the valve is moved into conduit closing position by moving the same on to a seat in a direction axially of the conduit. These known types of valve structures are not only complicated and accordingly expensive to manufacture but they are difficult to install particularly in the case of a conduit of small diameter and unless they are made extremely accurate are apt to provide a leaking fit under conditions where they are required to resist heavy testing pressures.

Accordingly, the primary object of the invention is to provide an extremely simplified form of test T which, normally, will provide a clear uninterrupted passage therethrough but which when intended for use as a test T can be easily equipped with an in serted part to provide a positive closing of the valve and which will insure the maintaining of the parts in conduit closing position irrespective of the pressures which it may be called upon to resist.

Another object of the invention and featuring the easy manipulation of the closure into position in the T is the providing of a test unit which can be made of one part and inserted in place by a simple transverse intrusion through an opening in the side of the T.

Various other objects and. advantages of the invention willbe in part obvious from an inspection of the accompanying drawings and in part will be more fully set forth in the following particular description of one form of mechanism embodying my invention, and the invention also consists in certain new and novel features of construction and combination of parts hereinafter set forth and claimed.

In the accompanying drawing:

Fig. 1 is a view partly in side elevation and partly in vertical axial section taken through a preferred embodiment of the invention;

Fig. 2 is a plan view looking down upon a portion of the structure shown to the left of Fig. 1 and with parts broken away to show normally hidden parts;

Fig. 3 is a transverse sectional view taken on the broken line 33 of Fig. 2 looking in the direction indicated by the arrows and with parts broken away;

Fig. 4 is a view in side elevation of the test T shown in the preceding figures with parts broken away and with a cover plate substituted for the test unit shown installed in the conduit in the preceding figures; and

Fig. 5 is a view in side elevation of the test unit shown in the preceding figures separated from and positioned above the associated T shown in Fig. 4.

In the drawing there is shown atest T 10 of somewhat conventional design including astraight fluid conduit 11 having afluid inlet 12 at one end adapted to be connected to the house pipe and afluid outlet 13 at the other end adapted to be connected to the house trap. Intermediate the ends the T is provided with afresh air inlet 14;. Between theinlets 12 and 14, the upper side of theconduit 11 is formed flat to provide a wide closure seat 15, of greater width than the diameter of the cylindrical part of the T as shown in Fig. 3. The seat is provided with a transversely extending, relativelynarrow opening 16 constituting a gate entrance. To one side of the gate opening the seat is provided with a water inlet 17 of relatively smallarea. When in normal operation functioning as part of the drain system of the house, theopenings 16 and 17 are closed by means of afiat cover plate 18 disposed on the seat 15 and secured in place bybolts 19 passing through the plate and into the seat as shown to the left of Fig. 3. Following conventional practices it is usual to position agasket 20 between the plate and seat as particularly shown in Fig. 4.

There is also supplied with the T when sold as an article of manufacture a one-piecereplaceable test unit 21 more particularly shown in Fig. 5. This unit comprises aflat head 22 corresponding in shape and dimensions with thecover plate 18 and like the cover plate adapted to be positioned on thegasket 20 when in position closing theopenings 16 and 17. Extending rigidly from the underside of thehead 22 is atapered gate 23 decreasing in cross section from its upper to its lower edge as shown in Figs. 1 and 5 and having arounded bottom 24 as shown in Fig. 3. This gate is designed to have its bottom and side edges fit in a U-shaped groove 25 formed in the wall of theconduit 11 facing thegate entrance 16 and having its upper ends opening into' said gate entrance. The groove is decreasingly tapered in width from its upper ends downwardly and conforms to the angle of taper of the edges of the gate as shown in Fig. 1. From this construction it is seen that the gate when in its closing position snugly fits in the groove and as its edges are positioned within the groove and gate entrance at the top it is held at its edges from the displacing action of the testing water pressure. Thehead 22 is also provided with anaperture 26 designed to be connected to a source of water supply indicated by the pipes 27 in Fig. 1 and by means of which the home pipes may be filled with testing water.

In operation it will be understood that when it is desired to place the house pipe under test pressure thecover plate 18 is removed by loosening thebolts 19. Thegate 23 is intruded through theentrance 16 and disposed with a lateral movement into position closing theconduit. The gate is guided by its engagement'with the groove on the inside of the conduit. There is thus formed in effect a wedging fit between the gate and the groove recess receiving the same and in case the parts should become stuck by the presence of mud or other foreign substances it is possible, by means of a blow on thehead 22 to force the valve into its closingposition. Should it be found impossible to lower thehead 22 into fluid tight engagement with its seat, any desired thickness of gaskets 28 may be built up to prevent leakage out of the T. The bolts are replaced and water admitted through the pipe 27 following conventional practices in this respect. \Vhen the test has been completed the unit is removed, the cover plate restored in position and the T is again available for use conventionally.

By means of the device disclosed it is possible to construct and market a test T which does not require any refined machining of its parts and need be'made only approximately to an exact size. The construction therefore features economy in manufacturingcosts and the simplification of and reduction in number of parts heretofore regarded as necessary. There has been provided a valve structure which can be quickly and securely mounted in place without necessity of reaching into the conduit with valve manipulating tools and without the necessity of slowly feeding the valve when disposed in an out-of-the-way position in the conduit. The gate can be installed in and removed from its closing position by manipulating the same exteriorly of the T.

I claim:

1. A test T provided with a bore having a fluid inlet at one end, a fluid outlet at the other end and a fresh air inlet opening laterally into the bore in spaced relation to said ends, a portion of the top side of the T between the air and fluid inlets being flat to provide a closure seat and having two lateral openings, one constituting a water inlet and the otherconstituting a gate entrance, said openings adapted to be closed normally by a cover plate secured to said closure seat, said T provided with a groove extending about the wall of the bore and Opening at its upper ends through said gate entrance, and a replaceable test unit adapted to be substituted for the cover plate and including a fiat head for engaging the closure seat, provided with a gate fitting in said groove and closing the bore and said head provided with an aperture adapted to be connected with a source of water supply and registering with the water inlet in the closure seat.

2. A test T comprising a conduit having on one side a closure seat provided with a gate entrance and a water inlet, a one-piece test unit comprising a head engaging said seat, said head provided with a gate projecting rigidly from the side thereof engaging the seat and adapted to close the bore of the conduit, and said head provided with an aperture adapted to be connected to a source of water supply and registering with the water inlet, and means passed through the head and engaging the seat for securing the gate in place.

3. A test T having'a bore normally free of gates or valves and provided on one side thereof with two openings, one constituting a gate entrance and the other a water inlet, two replaceable units, one constituting a cover plate for use in normally closing said openings and the other constituting a test unit adapted to replace the cover plate, means for securing either of said units in place, said test unit comprising a gate adapted to be intruded laterally into the bore of the T and constituting means to close the bore and provided with an aperture for registering with the water inlet.

Signed at New York in the county of Kings and State of New York this first day of October, A. D. 1927.

FRAN COHEN.

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