US222885A - Rogers field - Google Patents

Description

Flushing Tanks. Pate'ntd Dec; 23, I879.

R. Siphon for Sewage Inventor.-

. Rogers FieId .7

N PEIERS. PNOTD-LITROGRAPNER. WhSHWGTON. D. (3

UNITED STATES-PATENT OFFICE.

ROGERS FIELD, OF WESTMINSTER, COUNTY OF MIDDLESEX, ENGLAND.

IMPROVEMENT IN SlPHONS FOR SEWAGE AND FLUSHING TANKS.

Specification forming part of Letters Patent No. 222,885, dated December 23, 1879 application filed October 8, 1879; patented in England, October 28, 1875.

To all whom it may concern:

Be it known that I, ltoenns FIELD, of No. 5 Gannon Bow, Westminster, county of Middlesex, England, have invented an Improved Intermittent Siphon for Sewage and Flushing Tanks; and I do hereby declare that the following description, taken in connection with the accompanying drawings, hereinafter referred to, forms a full and exact specification of the same, wherein I have set forth the na- 1 ture and principles of my said improvement,

by which my invention may be distinguished from others of a similar class, together with such parts as I claim and desire to secure by Letters Patentthat is to say:

My invention relates to an improved intermittent siphon for sewage and flushing tanks, so constructed that notwithstanding a slow and gradual supply to the tank the siphon I comes fully into action when the liquid in the tank attains a certain level, and that its action becomes completely arrested when the liquid has been drawn off by the siphon to a certain lower level.

In the accompanying drawings, Figure 1 represents a vertical section of the siphon as placed in a tank with its disch arge-trough, and

Fig. 2 is a sectional plan of the siphon.

I It consists of two concentric tubes, A and B, the outer one, A, being closed at the top, and steadied and supported by three radial ribs, 1), projecting from the inner tube, B.

The annular space between A and B constitutes the ascending limb of the siphon,the

inner tube, B, forming the descending limb.

. At the upper mouth of B is fixed a conical shell, 0, projecting inward clear from the inner surface of the tube B. The lower mouth of B discharges into a trough, D, which has a weir,'d, level with the discharge-mouth of B,

1 and over this weir is placed a secondary siphonpipe, E, the inner mouth of which is below the level of the mouth of B.

While the tank is being filled up to the level of the top of the inner tube, B, there is no siphon action; but after it has been so filled a very little rise of the level, however slow may be the supply tothe tank, has the effect of starting the siphon action in the following manner: A portion of the liquid overflowing the top of B descends by it into the trough D, which it fills to the level of the weir 0?, thereby sealin g the lower mouth of B. A further portion of liquid overflowing the top of B is directed by the shell 0 so as to descend in B clear from its interior surface, thus displacing the air in B and fully starting the siphon action, which goes on till the liquid in the tank reaches the level of the lower mouth of A, after which air is admitted by that mouth to the siphon. Meanwhile, owing to the rapid supply from the siphon A B to the trough D, the secondary siphon E has become charged, and when the supply to D is checked by the admission of air to A B, as above described, the siphon E continues in action and draws ofl' liquid from the trough D suflicicntly to unseal the lower mouth of B, whereupon the action of the siphon A B is completely arrested, and presently the action of the secondary siphon E is also stopped by the admission of air thereto. Things remain in this condition until the tank is again filled to the level of the top of the inner tube, B, whereupon the action above described is repeated.

Instead of carrying the shell (3 quite round the mouth of B, a portion of it may project inward as a lip at one place, sufficient to project the liquid into the middle of the tube B without permitting it to strike the side.

I find it also of advantage to provide a small protuberance, such as F, or roughness at the top of the tube B, as this has the effect of breaking the stream, and thereby more effect.

ually displacing the air.

Furthermore, a notch, a, formed in the lower mouth of the tube A, has the eflect of more completely arresting the siphon action by the admission of air when vthe lower level of the I have described an annular form of siphon as being compact, and also giving great facility for cleansing by lifting off the outer tube, A.

Where it is objectionable to cnta hole through the tank-bottom, a bent siphon may be employed as indicated by the dotted lines A. The descending limb B being constructed and arranged as described with reference to the annular form of siphon, a would represent the notch in this case.

Having thus described the nature of my in Vention, and the best means I know of putting it into practical operation, I claim- 1. In combination with the descending limb of a siphon, the shell or lip O, substantially as herein described.

2. In combination with the descending limb of a siphon, the discharge-trough D and secondary siphon E, substantially as herein described.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing Witnesses, this 20th day of August, 1879.

ROGERS FIELD. Witnesses:

CHAS. D. ABEL, JNo. I M. MILLARD.

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