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Publication numberUS491184 A
Publication typeGrant
Publication dateFeb 7, 1893
Filing dateOct 12, 1892
Publication numberUS 491184 A, US 491184A, US-A-491184, US491184 A, US491184A
InventorsP. Mccartney
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
John p
US 491184 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

(No Model.)



No. 491,184. Patented Peb. 1,1893.

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SPECIFICATION forming part of Letters Patent No. 491,184, dated February, 7, 1893. Application filed October l2,1892. SerialNo. 448,639. (No model.)

To @ZZ whom it may concern:

VBe it known, that I, JOHN F. MCOARTNEY, a citizen of the United States, residing at Worcester, in the county of Worcester and State of Massachusetts, have invented a new and useful Double Testing-PlugforSoil-Pipes, &c.', of which the following, together with the accompanying drawings, is a specification sufficiently full, clear, and exact to enable persons skilled in the art to which this invention appertains to make and use the same.

The object of my invention is to provide a testing-plug or appliance having two expansible Stoppers, arranged at separate positions on a connecting stem or tube, and combined therewith convenient and efficient means for :severally operating said Stoppers, or for inde- Referring to parts, A denotes the hollow stem or tubular body, having disposed thereon with suitable interveningspace between them, the two expansible Stoppers O and D, each of which is preferably composed of a head-plate 3 that is rigidly supported on the stem; a bellshaped cap 4 of corresponding diameter that is movable on the stem, and an elastic annulus 5 that is supported and compressible between the hanged edges of the head 3 and cap disks 4, as indicated. The stem A can be made of ordinary gas pipe stock, and it is best provided at or near one end with a handle h that projects laterally therefrom. The stem is screw-threaded on its exterior at a and a winged nut F is arrangedA on the thread a, which nut turns against the cap 4 of the stopper O for compressing and relieving the rim or annulus 5 of said stopper.`

B indicates a rod extending longitudinally through the tubular stem A and having one end attached to the cap or plate 4 of the stop=` per D, which is confined to the end of the rod that projects from the hollow stem by a nut 6, or in other suitable manner. On the other end of said rod, which is threaded as at b, there is arranged a hand-wheel-nut G that turns against the end of the tubular stem for drawing said rod and the compressing cap 4 or stopper D forward. A tip or stop-nut 7 is best arranged on the end of the rod B to pre- 6o vent the nut G from running olf when turned backward.

The rod B is confined from rotating within the tubular stem A by suitable means. This is effected in the present instance and preferably by a pin 8 fixed in the rod B and engaging in a slot, or slots, 9 formed in the tubular stem A along that portion within the stopper D.

. The head-plates 3 can be screwed onto the 7o threaded exterior of the tubular stem A and there rigidly fixed by check-nuts n, as illustrated; or, if in any case preferred, said headplates can be cast on said stem, or be secured in place thereon by pinning or riveting the parts together. The cap 4 or stopper D, being confined by a nut 6 separate from the cap, allows the cap to swing slightly so that the stopper can conform to any irregularity in the pipe.

The operation is as follows;-The soil pipes 8o P having been put up and all connections made ready for testing, this double-plug is inserted into the foot of the pipe, as indicated in Fig. 2, with the Stoppers C and D at opposite sides of the mouth m of the branch pipe. While the operator steadies the appliance by a hold on the handle h, the wing-nut F is turned up for expanding the stopper C causing it to firmly close the pipe at the outer end of the portion which extends through the cel- 9o lar wall W. The hand-wheel nut G is then turned, drawing forward the rod B and cap 4 of the stopper D, thereby expanding said stopper to firmly close the pipe beyond the mouth m of the branch. The upright pipe P and connection thereof can then be tested by filling it with water introduced through a hose or in usual well known manner. When the test is completed the water from the pipes P can be discharged without its wetting the celmo lar, and passed olf into the sewer by way of the exit S, by simply turning back the hand- Wheel nut G which relieves the stopper D before the stopper C is released. When the water has passed off the stopper C is released, by turning back the wing-nut F, the doubleplug removed and a permanent stopper or cap placed in the end of the pipe. This doubleplug appliance can, in similarmanner be used for temporarily closing oft` any branch in a main or soil pipe Wherever convenient and desirable.

It will be understood that I do not claim, broadly, the invention of an expanding stopper having an elastic annulus expansible by compression between'VY approaching disks or surfaces; as I am aware that such :means have heretofore been employed in dierent constructions for closing an orifice or passage.

What I claim as my invention to be secured by Letters Patent, is

1. A testing-plug for soil-pipes, having two eXpansible Stoppers on a single continuous stem with an intervening space between said stoppers for spanning the mouth of the branch pipe, and means for independently expanding and releasing said Stoppers operative from the outer end of the stem, for the purpose set forth.

2. A testing-plug for soil-pipes having two expansible Stoppers arranged with intervening space, both in connection With a common tubular body or hollow stem, an operating rod extending through said hollow stem, oneend of said rod connected to the. operating part of one of said stoppers, and its opposite or outer end having thereon a nut or means for effecting endwise movement of said rod, substantially as set forth.

3. The combination, of thetubular-stem, the two Stoppers C and D, comprising the headplate, elastic annulus, and movable cap or compressing disk, their head-plates fixed on said'stem, the operating-nut F fitted to the screw-threaded exterior of said stem and turning against the cap of stopper C, the rod eX- tending through said tubular stem and coupled to the cap of the stopper D, and the operating nut G arranged on the threaded end of said rod, all substantially as and forthe purpose set forth.

4t- The rod. B, provided with the end-11,11@ 6 and pill S, in combination with the hollow Stem A slotted, as at 9, thel stopper D having its cap 4 separated from and fitting against Said end Hut, and the hand Wheel-nut G fitted Qn the opposite threaded end of said rod against the tubular stem, as set forth.

Witness my hand this lst day of October,

JOHN F. McoAR'rNEY. WitneSSes:


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2685380 *Sep 13, 1950Aug 3, 1954Moeller Mfg CoStopper
US2853773 *Nov 23, 1955Sep 30, 1958Edward DaraskoPipe joint aligner and wiper
US3179279 *Feb 19, 1960Apr 20, 1965Atomic Energy Authority UkSealing plugs
US4723440 *Mar 6, 1986Feb 9, 1988Phillips Petroleum CompanyApparatus for temporarily plugging inaccessible tube and method of leak testing utilizing the same
US4890483 *Dec 18, 1987Jan 2, 1990Manfred VetterApparatus for testing the watertight capacity of pipes
US5152311 *Aug 3, 1989Oct 6, 1992Timothy McCrearyMethod for preventing fluid from reaching a portion of a pipe
US5363881 *Sep 27, 1993Nov 15, 1994Larkin Brent HPlumbing tool for temporarily plugging a pipe with field-replaceable gasket
US5365976 *May 18, 1992Nov 22, 1994Peter TozerApparatus for stopping the flow of natural gas
US6135140 *Jun 8, 1998Oct 24, 2000Grandinetti; Frank J.Storm drain diverter
US9004304 *Jul 16, 2013Apr 14, 2015Lincoln Industrial CorporationDevice for at least partially blocking an opening and forming a seal in the opening
US20150020921 *Jul 16, 2013Jan 22, 2015Scott Allen SandersDevice for at least partially blocking an opening and forming a seal in the opening
US20150021862 *Jul 16, 2013Jan 22, 2015David Mark AllenDevice for at least partially blocking an opening and forming a seal in the opening
Cooperative ClassificationF16L55/132