Table III Experiments on Water Scour 200

Fig. 189

Fig. 189a.

Fig. 189a.

Plan and section of thirteen-inch trap without the partitions.

• The actual course of the water in these cases was, however, altogether different from our theoretical assumption. Under siphoning action, the course of the water presented the appearance shown in Fig. 191. The water was projected violently upward from the inlet mouth, and, striking the glass top of the trap, was reflected in a strong spray downward and outward with the formation of bubbles extending nearly half way across the trap.

Table III Experiments on Water Scour 202

Fig. 190.

Apparatus for making our experiments on friction.

At the same time powerful waves were set up which tended to form rings around the inlet mouth spreading outwards in all directions to the four sides of the trap about as shown in the drawing.

Table III Experiments on Water Scour 203

Fig. 191.

Movement of water in our large flat trap under siphoning action.

Table III Experiments on Water Scour 204

Fig. 192.

Movement of water in the same trap under the normal discharge of water. Water from the fixtures it serves.

It was for the purpose of breaking down these waves in the manner already described that we constructed the various arrangements of partitions in the traps we have illustrated.

On the other hand the course of the water under a normal discharge of waste water through it from the fixture it serves, as from a bath tub represented by the tank in our Fig. 190, with which these tests were made, was even more at variance with the expected.

The water, though coming with great force under the head shown in the cut, seemed nevertheless to eddy about quite leisurely and sluggishly in all sorts of directions, forming, to all appearances, quite meaningless and uncalled for curves and spirals, with occasional unaccountable dartings toward unexpected points. It appeared to meander about, as one might say, "with its hands in its pockets," and not by any means to rush direct to the outlet opening with the frantic haste and decided manner we had confidently expected and planned for it. Fig. 192 gives quite an accurate idea of the curious antics played by the current. The black specks in the drawing indicate pieces of heavy solid matter thrown into the water for the purpose of better studying its peculiar movements. These at times jumped about quite quickly, and at other times lay motionless for a while as if deliberately resting for some violent effort a moment later.

Table III Experiments on Water Scour 205

Fig. 195.

Table III Experiments on Water Scour 206

Fig. 196.

Fig. 195 and 196 show our 13-inch glass experimental traps in perspective. The large horizontal dimensions of the first give it still the cesspool quality, and the figure shows how it would clog in time with grease under a sink. The second cut shows it divided so as to produce the water scour.

Our fifth and final step consisted in constructing the parts of the trap in such a manner as to permit of economical manufacture and easy opening and closing for examination while in use. Figs. 197 to 200 inclusive show two forms adopted, the first being adapted to be placed above the floor level and the second below the floor and serving two or more fixtures at once, as, for instance, a bath tub and one or more adjacent set basins.

The cover may be made of brass or of tile impervious to air and water, of octagonal shape and designed to harmonize with the tile or mosaic floor of a modern bath room. This form, however, the writer has not used, a later form being preferable.

Table III Experiments on Water Scour 207Figs. 197 and 198. Spiral Basin Trap.

Figs. 197 and 198. Spiral Basin Trap.

Table III Experiments on Water Scour 209

Fig. 109.

Table III Experiments on Water Scour 210Figs. 200 and 201.

Figs. 200 and 201.

Figs 201 to 205 inclusive give perspective views of these traps as they would appear both closed and open.

The floor trap is shown in Figs. 206, 207 and 208, serving three fixtures, namely, the bath tub, the basin and also the water closet connected with its own deep seal trap. In order to permit of this triple service the inlet arm of the trap is branched above the floor to take the basin waste

Table III Experiments on Water Scour 212Figs. 199 and 200. Spiral Bath and Basin Trap, as actually constructed.

Figs. 199 and 200. Spiral Bath and Basin Trap, as actually constructed.

Table III Experiments on Water Scour 214

Fig. 204.