US1601805A - Drum traps - Google Patents

Description

Oct. 5 1926.

G. o. MILLER DRUM TRAPS Filed Deb. 18, 1922 JG 55. i attoznaq 1 10605217 Q Patented Oct. 5, 1926.

UNITED STATES PATENT QFFicE.

DRUM TEARS.

Application filed December 18, 1922. Serial No. 607,583.

My invention relates to improvements in drum traps, such as are employed between the waste of a bathtub and the sewer of a building, 7

.Owing to the fact, that traps of this kind are placed between joists forming part of the floor of a building and are intended to be concealed by the flooring placed on the joistsa-nd the ceiling applied to the lower. edges of the jloists, 'insufficient space s allowed under e present day constructions for the use of a rtrap .c'apa-ble .offfurnishing the proper water seal.

Man-y. buildings are constructed with joists having ,a width .or depth ofsix or eight inches, and the water seal within the trap is so small that it becomes easily siphoned, thus allowing the gases from the sewer to pass upwardly through the drain pipe into :the bathroom. 1

It is the pur ose of my invention .to provide a trap wliich will take up comparatively little space especially in a vertical direction, yet furnish a water seal which .can not be broken by siphonic ,action.

Another object of my invention is to provide a drum .trap providing .a water seal of a height that could only be furnished in the present type (of drum "trap ,whenljoists several inches wider than ordinarily employed -.in;dwellings are ,used. 3

A further object of invention is to provide a trap of this kind with a water 'seal in which the 'seal extends upwardly to a level above the outletofthe trap, thereby giving the water seal a free overflow.

A still further object is to provide .a trap of this kind with-an intennal waterseal and with an outlet which is positioned considerably lower than .the level of the seal, thus enabling the use of the trap between joists having a double floor applied thereto, atthe same time assuring a larger and more effective water seal and positioning the inlet pipe above the ceiling applied to the lower edges of the joists, even though said joists are only six inches in width.

With the above and other objects in view the invention consists in the novel features of construction and in the arrangement and combination of parts to be hereinafter described and more particularly pointed out in the subjoined claim.

In the drawings Fig. 1 is a sectional elevation through a Lira constructed in accordance with m in=- vention, the same being shown in position in a floor dividing two stories of. a building.

' Fig. 2 is a horizontal section taken on line 22, Fig. 1.

The floor dividing the two stories of a building comprises joists 3, of which one is shown at the right of the trap, another being spaced an approved distance to the left of the trap, cleats 4t fastened to the sides .of these joists, and boards 5 which are nailed to said cleats and through which an opening '6 is formed for the .drum trap 7, considered as a whole. placed,and tile 9 covers this cement and the upper edges of the joists 3.

While the drawing illustrates one form .of floor, where a wooden flooror double wooden floor is used, flooring material is applied directly to the upper edges of the joists.

The construction of the building forms no part of my invention, but in the particular construction shown the ceiling 10 of the story below is applied to thelower edges of the joists 3. I j

The [drum trap 7 comprises a body portion or casing 11 which is preferably cylin- .drical'and reduced at its lower end, as at 12 and wherethe peripheral wall of the reduced portion of the ,trap swells outwardly -,or merges into the enlarged upper portion thereof, a conical internal wall 13 extends upwardly into the interior rojf the trap to within a short distance of the upper ,end of ,the body portion ,7, theupper end of this nonical wall being open, as at 14 and the lower end meeting and merging into the wall of the casing where the reduced lower portion swells outwardly and merg'es into the larger portion of the casing. This coni .cal wall is made concavo-convex in vertical extension with its inner surface convex and forming a smooth continuation of the inner surface of the reduced lower portion of the casing. while the outer surface of said conical wall is concaved in Vertical extension and furnishes a comparatively wide annular space between said conical wall and the surrounding portion of the casing.

15 is an outlet boss formed on the body of the trap at one side thereof and this furnishes an escape or outlet opening for the trap arranged in a plane considerably below the upper end. of the conical wall 13, which may be termed a trap wall, The wall of raises On the boards 5, cement 8 is this outlet boss along its lower portion merges into the conical wall at the base thereof and therefore a smooth unobstructed opening is provided from the annular space around the conical wall outwardly through said boss. The particular formation of the conical wall and the manner of connecting the same to the casing provides a self-cleansing inlet for the trap, especially since the inlet opening in the bottom of the trap is axially arranged and has a free unobstructed passage provided through the trap. The siphonic action taking place, when waste passes through the trap, assures the drawing out of all dirt with the waste passing through the trap. An outlet pipe 16 leading to the sewer is threaded into the outlet boss 15, or this pipe may be otherwise applied thereto.

The bottom of the trap has an axial opening 1'? and extending upwardly around this opening is an annular flange 18, the interior of which forms a continuation of the opening 17. Said opening is internally threaded to receive a nipple 19 which has an elbow 20 threaded thereon, and entering the elbow 20 is an inlet pipe 21, which leads to the waste of a bathtub.

The body portion of the casing 7 of the trap is provided at its upper end with an in ternal flange 22, and the upper edge of its wall is arranged flush with the top of the tile or other flooring. Threaded into the upper end of the casing or body portion of the trap is a cover 23. which slightly overlaps a portion of the flooring material, as at 2%, and has the usual square projection 25 by means of which the cover can be conveniently threaded into the casing or body portion of the trap to close the upper end of the same or be as readily removed so access may be easily had to the interior.

By having an internal trap wall 13 whose upper end is considerably above the outlet opening of the casing, a comparatively short trap is provided and a water seal furnished of considerable height, the result being that the water passing out through the outlet pipe would not, under any condition, create sufficient suction to break the seal and cause the trap to become siphoned. Furthermore, by reason of this construction, comparatively little space in height is occupied by trap wall, which forms a water space extending from the lower wall of the casing or body portion of the trap to the, upper end of said wall, a deep water seal or space is provided, and by reason of the outlet 15 being at a comparatively low point, a free dis charge from this water space is furnished. Moreover, the relative arrangement of these parts permits of constructing a trap of comparatively small dimensions, particularly so in respect to its height. It, therefore, occupies only a small space between the floor and ceiling, in contradistinction to the'old form of trap in which the length or height of the body must be increased in order to enlarge the height of the water seal, and in any event said water seal, even though the trap is placed between oists ten inchesin width, is comparatively shallow and therefore easily effected by syphonic action;

lVhile I have shown a trap of cylindrical formation in cross section, any other cross sectional formation may be given the same if desired.

Having thus described my invention, what I claim is r A drum trap having a cylindrical casing with an inlet at its lower end and a lateral outlet, a conical internal wall extending upwardly into said casing and spaced from the surrounding wall of said casing, said conical wall being' concavo-convex in vertical extension and having the convex surface on its inner side and the concaved surface on its outer side, thereby assuring a self-cleansing trap and a comparatively wide annular space around said conical wall.

In testimony whereof I affix my signature.

GEORGE O. MILLER.

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