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Publication numberUS243741 A
Publication typeGrant
Publication dateJul 5, 1881
Publication numberUS 243741 A, US 243741A, US-A-243741, US243741 A, US243741A
InventorsFrederic Tudor
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Frederic tudor
US 243741 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

(No Model.)


.Patelited July 5, 18 81.

7s "I l; w'


WITNESSES r I 4 INVENTUR= W a I u PETERS, PhoioLhhonphen'Walhigton. n, c,




SPECIFICATION forming part of Letters Patent No. 243,741, dated July 5, 1881,

(No model.)

T all whom it may concern:

Beitknown that I, FREDERIO TUDOR, of New York city, New York, have invented certain new and useful Improvement in Testing Drain- Pipes, of which the following is a specification.

It is well known that the leakage of sewergases from waste or drain pipes into the apartments of dwellings is very prejudicial to health, and is a source of fatal diseases, which hence renders it very desirable that some means he provided of testing such pipes, or so constructing them that they may be readily tested to 7 determine whether any leaks exist, andif so to show their location, so that they may be easily found and stopped. fore employed for this purpose is to charge the pipes with water and search for leaks, which will be indicated by an escape of water at the leaking place This, however, is troublesome and unsatisfactory, and is liable to cause great damage to the dwellings should any serious leak exist.

My invention aims to provide a means whereby the drain or waste pipes may be tested in a convenient, sure, and safe manner; and the annexed drawing, together with the following description, will show in what the invention consists and how it is applied.

The figure in the drawing represents a sectional elevation of a three-story house with cellar, showing the system of drains, also in section.

The drains consist of a main horizontal and vertical pipe, a, receiving the rain-water leaders a, and also a ventilating-pipe, b, which passes through the roof of the house, and from which lateral branches extend within the house to the upper bends of the several traps of the water-closets, sinks, bath tubs, and washbasins, while the waste from said traps is discharged into separate branch pipes at connecting with the main waste pipe a, as fully illustrated in the drawing. It may be now observed that all the openings of the drains, whereby the interior might be in free communication with the outer air, are represented in the drawing as closed, the openings thereof in the house being closed by the water in the traps, which is their usual condition, the ventilating-pipe being closed by a temporary airtight hood tied over the same, while the rain=.

The only means hereto-' of the gage.

leaders are closed by boards or plugs and airtight packings placed across the pipes at some convenient point in the manner of a roughlymade gate-valve, as indicated at c 0. Finally, the whole system of drains as relates to their contained air is isolated from the sewer by means of a trap at It, or, where there is no trap, a plug or valve may be used. The arrangement is hence such that if air be forced into the drain-pipes by way of one of the branch waste-pipes, whose trap may be emptied for that purpose, pressure will be accumulated if the pipes are tight, but not otherwise. For this purpose, however, I provide the ventilating-pipe b-say on the top floor-with a special opening or nipple, f, for the attachment of a gage, e, and air-forcing apparatus, which nipple may be closed at all other times. To test the pipes, air may now be blown into the pipes by the breath through the nipple f and an attached mouth-piece, and where the drains are not too large or numerous a pressure may be readily accumulated within the drains in this way, if they are not too leaky, and this pressure will be indicated by the gage or manometer 6, attached to the nipple f.

In the case of newly-laid drains in an ordinary dwelling-house no further apparatus than as just described is necessary, and if the pressure produced by the force of the breath in the pipes is maintained, which will be shown by the gage, the drains may be considered tight; if not, leaks must exist. Where the pipes are numerous, large, or leaky, however, a more powerful blowing apparatus than the human lungs will be necessary, such as a bellows or air-pump, as shown at g, the discharge-pipe of which is connected with the testing-nipple f. To test the pipes by this apparatus it is only necessary to see that all the regular openings of the drains are closed,as before described, and then to operate the pump 9, If the pipes and joints are all tight, a pressure will nowbe speedily accumulated and maintained within the same, and this will be clearly indicated by the gage. If, however, there are small leaks, the pressure will slowly diminish, and if the leaks are large, no pressure can be accumw lated, all of which will be shown by the action The exact location of the leaks can be obtained by forcing the air through a chamber, h, containing strongly-odorous materialsuch as oil of peppermint, spirits of camphor, or other powerful and distinctive scentplaced between the air-pump and the nipple f, so that the air entering the drains will be strongly scented, and its escape from any leak will enable the latter to be accurately locatedby scent, which leaks may then be closed so as to render the pipes tight.

The chamber H is connected with the pipe h, through which the air is forced, by branch pipes t i and cooks j j at each end, and between the branch pipes i t' is set a cook, it, by means of which the air from the pump may be either forced directly through the pipe h or may be passed around through the chamber, as desired, by simply turning the cocks in the proper positions.

In case it is desired to obtain a greater degree of pressure than the traps will allow,checkvalves can be put into the waste-pipes, or the traps may be securely plugged, when the press ure may be increased to the desired extent.

By this means it will be seen that the drains of a house, whether new or old, may be quickly tested in a convenient and certain manner,

which will avoid injury to the house, insure the detection of leaks, and enable the same to be stopped up, so as to render the drains tight and in correct sanitary condition, which has been heretofore very desirable.

I am aware that it is not new to test gaspipes by pumping air or ether or other odorous material into them, and therefore I make no claim, broadly, to the testing of pipes by pumping into them either air or strong scents.

What I claim is- The combination, with a system of drains substantially such as set forth, of a branch or air pipe having an opening or nipple, f, a pump, g, scent-chamber H, air-pipe h, branch pipesi 02, provided with cocks j j, and communicalingwith the opposite ends of the scentchamber, and the cock is between said branch pipes, whereby either common or scented air may be forced into the drains at will for testing said drains, substantially as shown and described.




Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3003349 *Mar 9, 1959Oct 10, 1961Little Inc AWarning system
US6282943Aug 31, 1999Sep 4, 2001Basic Resources, Inc.Apparatus and method for detecting substances
Cooperative ClassificationG01M3/2853, Y10S4/07