US939804A - Testing-plug for sewer-traps. - Google Patents

Description

J. P. GHRISTY. TESTING PLUG FOR SEWER TRAPS.

APPLICATION FILED SEPT. 28, 1908.

Patented Nov. 9. 1909.

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UNITED STATES PATENT OFFIGE.

JOHN F. CHRISTY, OF SHERIDAN, PENNSYLVANIA.

TESTING-PLUG FOB SEJVER-TRAPS.

To all whom it may concern:

Be it known that 1, JOHN F. CHRisTY, a citizen of the United States, residing at Sheridan, in the county of Allegheny and State of Pennsylvania, have invented or discovered new and useful Improvements in Testing-Plugs for SewerTraps, of which the following is a specification.

My invention relates to plugs for closing sewer traps during the testing of the wastepipe connections.

It is the object of my invention to provide a plug for use in standard traps having a clean-out opening of smaller diameter than the diameter of the trap below the inlet to the trap. In such a trap it is obviously impossible to insert ordinary closures through the clean-out opening.

Various devices such as cement, inflated bags, and expanders, have been used to prevent the passage of water through traps while the waste-pipes were under test. I have avoided the faults incident to such devices by utilizing the differential of pressure on two closures to prevent the testing fluid from escaping through the clean-out or the regular trap outlet. At the same time, I provide for the discharge of the testing fluid through the regular trap-outlet by a mere adjustment of my device.

Referring to the accompanying drawings, which are illustrative of only one form of my invention, Figure 1 is a longitudinal section through a trap, in which my invention is shown in elevation, the parts being in the position for making a test of the wastepipes; Fig. 2, a view similar to Fig. 1, but with my invention adjusted to discharge the testing fluid; Fig. 8, a similar view showing the manner in which the parts of my invention are assembled; Fig. 4L, an enlarged vertical section of my invention with the upper end of the stem broken off; Fig. 5, a perspective of the hinged washer which sup ports the lower plug or packing; Fig. 6, a section of the stem showing in full lines a lock in operative position and in dotted, the same in released position; and Fig. 7, a perspective of one of the locks.

On the drawings, 1 represents a trap having the outlet 2, the inlet 3, the vent 4., and the clean-out 5, the vent 4 being shown closed by the plug 6, which with the vent forms no part of my invention. The cleanout 5 is shown as having a smaller diameter than the trap has at the point '7 just below Specification of Letters Patent.

Application filed September 28, 1908.

Patented Nov. 9, 1909.

Serial No. 455,016.

the lower edge of the inlet 3 and above the upper sharp bend 8.

I provide the preferably bell-shaped support 9 having an annular horizontal flange 10 at its lower end, the body portion tapering upwardly from the flange to the top where it is provided with the hook 11.

12 is the washer made in two sections hinged at diametrically opposite sides. This washer in use sits on the flange 10 and forms a seat or support for the packing ring 13, which has its upper side cup-shaped, the outer flange 14 tapering upwardly and flaring slightly as shown in Fig. l. An upwardly extending tapering flange 15 surrounds the center hole in the packing ring and flares slightly inwardly to make a close fit with the body of the support 9.

The rod 16 is detachably connected at its lower end to the hook 11 and has at its upper end the handle 17. The valve or plug 18 is slidable on the rod 16 and carries the annular packing or gasket 19 which tapers downwardly and is of such a size as to form a closure at the mouth of the cleanout 5. The packing 19 is preferably retained on the plug 18 by means of the shoulders or flanges 20 and 21 at its opposite edges. The upper portion of the plug 18 preferably tapers upwardly and has at its top a de pression to receive the annular packing 22 which is sleeved on the rod 16 and prevents the passage of the testing fluid from the interior of the plug. The washer 23 is slidable on the rod 16 and lies on the top of the packing 22.

On Figs. 6 and 7, I show one of the locks for holding the packings or plugs 9 and 18 at certain distances apart. I preferably have two of these locks, an upper one 2 1 and a lower one 25. As both locks are constructed alike only one need be described. The lock 25 has near one edge the hole 26 of such shape and size as to permit the lock to slide easily on the rod. The hole 26 has an extension or slot 27 somewhat narrower than the hole 26 so that the lock may he slid lengthwise whenever the slot 27 is opposite any pair of the notches 28 in the rod. Fig.

6 shows in full lines the rod 16 with the slot 27 embracing it at a pair of notches 28.

In order to make a test of the waste-pipes connected to the trap 1, the plumber slides the locks 24 and 25, the washer 23, the packing 22, the plug 18, the packing 13, and the hinged washer to the upper end of the rod llt 16. He then lowers the support 9 through the clean-out 5 to about the position shown in Fig. 3; doubles the washer 12 back on its hinges and slides it endwise along the rod till it is past the clean-out 5 when it is allowed to slide over the tapering body 9 and seat itself on the flange 10, the hinge being cut away near the central hole to permit the washer to lie flat on the flange 10; doubles the packing so that it will enter the clean-out 5 and pushes it down to its seat on the washer 12; lowers the plug 18 until it sits on the shoulder within the bell of the clean-out, as shown in Fig. 1; slides the packing 22 down into its seat on the top of the plug 18 with the washer 23 on the top of the same; brings the slot 27 of the lock 25 into line-with a pair of notches 28 and pushes the lock endwise so as to connect the rod and the lock rigidly together; and connects the lock 24: to the rod 16 at such a pair of notches that, if the lock 25 be released and the rod 16 slid down until the lock 24 rests on the lock 25, the packing 13 would open the outlet beneath the bend 8 in the trap, as shown in Fig. 2. The rod 16 can be raised or lowered slightly so as to bring a proper pair of notches 28 just above the washer 23, the notches being so close together that there will be no danger of raising the packing above the lower side of the inlet 3 or of lowering the same below the bend 8. If the waste-pipes be filled with water, the parts of my invention being as shown in Fig. 1, the washer 13 will, because its area is greater than the area of the plug 18 exposed to pressure, pull the valve or plug 18 tight on its seat. The pressure, of the water will expand the flanges 14: and 15 so as to prevent the passage of water beyond them and will also pull the packing 22 tight on its seat. After the test of the waste-pipes has been completed, the plumber drives the lock 25 so that the hole 26 is in line with the rod, whereupon the pressure of the water on the packing ring 18 forces the latter down until the lock 24 rests on the lock 25 as seen in Fig; 2, which shows the packing ring below the bend 8. The arrow 29 shows the space where the water escapes and its direction of flow. If the lock 24 had not been provided at the proper place, it is possible that the support 9 might by reason of tilting in the bottom of the trap and by reason of the strong flow of the water, cause the hook 11 to be disconnected from the rod 16, in which case the support 9 with the washer 12 and the packing ring 18 would be swept in the sewer.

By making the washer 12 hinged or otherwise in sections, I am able to pass through the clean-out 5 a washer having a greater diameter when straightened or assembled than'the clean-out. By making the packing separate from the support 9, I can also pass it by pinching it together through the small clean-out opening into the larger trap passage at the point 7. The locks 24 and 25 are stops and may be replaced by various means.

Other changes may be made in my invention without departing from the spirit of the same.

I claim 1. For plugging the clean-out and the outlet of sewer traps at opposite sides of the inlet, where the clean-out is smaller than the outlet, a plug having a foldable elastic cup-washer adapted to fitthe interior ofthe said outlet, a plug adapted to close the cleanout by a movement toward the said outlet, and means connecting the said plugs together.

2. For plugging the clean-out and the outlet of sewer traps at opposite sides of the inlet, where the clean-out is smaller than the outlet, a plug adapted to fit the said outlet, a plug adapted to close the clean-out by a movement toward the said outlet, and means connecting the said plugs together, said connecting means being adjustable whereby the larger plug may move to uncover the outlet at the bend in the trap.

3. In a plug for closing the outlet of a trap having a clean-out smaller than the said outlet, a support, a sectional washer of larger diameter than the clean-out adapted to be carried by the said support, and a foldable packing ring adapted to be sup ported by said washer and adapted to the said outlet.

1. In a plug for closing the clean-out and the outlet of a trap having an inlet between the same, the clean-out being smaller than the outlet, a packing support in the outlet, a rod connected to the support and extending through the clean-out, a toldable annular packing for the outlet slidable on the rod, a valve slidable on the rod and adapted to close the clean-out by an inward movement, and releasable means for preventing the valve andthe packing-ring support from movement, one away from the other.

In a plug for closing the clean-out and the outlet of a trap having an inlet between the same, the clean-out being smaller than the outlet, a packing to close the outlet, a support for the same, a notched rod connected to the support and extending through the cleanout, a valve slidable on the rod and adapted to close the clean-out, and a slotted lock cooperating with the said notches for preventing the valve and the packing-ring support from movement, one away from the other.

6. In a plug for closing the clean-out and the outlet of a trap having an inlet between the same, the clean-out being smaller than the-outlet, a packing to close the outlet, a support for the same, a rod connected to the support and extending through the cleanout, a valve slidable on the rod and adapted to close the clean-out, releasable means for preventing the valve and the packing-ring support from movement, one away from the other, and a stop to limit the movement of the rod when the releasable means is made inoperative.

7 For use with a casing having an inlet between a pair of openings, one of the latter being the outlet and larger than the other, a pair of connected plugs for the said pair of openings, the plug for the larger opening being foldable whereby it may be passed through the smaller opening and then expanded to close the larger opening.

8. For use with a casing having an inlet between an outlet and a smaller opening, an outlet valve normally too large to be inserted through the latter opening but foldable so as to be insertible therethrough, a valve to close said latter opening, and a connection between said valves.

9. For use with a casing having an inlet between an outlet and a smaller opening, an outlet valve normally too large to be inserted through the latter opening but collapsible so as to be insertible therethrough, a valve to close said latter opening, and a connection between said valves, said outlet valve being constructed to be automatically expanded by the pressure of fluid in connection with the inlet so as to close the said outlet.

10. For use with a casing having an inlet between an outlet and a smaller opening, an outlet valve normally too large to be inserted through the latter opening but collapsible so as to be insertible therethrough, a valve to close said latter opening, and a connection between said valves, the difi'erential of pressure on the two valves holding the smaller valve on its seat.

Signed at Pittsburg, Pa., this th day of September, 1908.

JOHN F. OHRISTY.

Witnesses SUZANNE S. BEATTY, ELVA STANIEK.

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