US1180870A - Sewage-spraying apparatus. - Google Patents

Description

A. T. NABSTEDT.

SEWAGE SPRAYING APPARATUS.

APPLICATION FILED JULY 7. 1915- Patented Apr. 25, 1916.

2 M w 7m ARTHUR THEODORE NABSTEDT, OF NEW HAVEN, CONNECTICUT.

SEWAGE-SPRAYING APPARATUS.

Specification of Letters Patent.

Patented Apr. 25, rain.

Application filed July 7, 1915.- Serial No. 38,560.

To all whom it may concern:

Be it known that I, ARTHUR T. NABSTEDT, a citizen of the United States of America, residing at New Haven, county of New Haven, State of Connecticut, have invented certain new and useful Improvements in Sewage-Spraying Apparatus, of which the following is a specification.

My invention relates to sewage spraying devices designed to break up vertical jets of sewage into evenly distributed spray which after passing through the atmosphere deposit on filter beds or other surfaces preparedfor reception of the sewage. Devices of this kind are subject to various objections when made in the usual manner, in

that the jet orifices are liable to clog up, and

different amounts of sewage are discharged over the various unit areas along different radii, thus producing uneven distribution upon the receiving bed. When such clogging occurs it produces two bad effects. Until the nozzle is cleaned the capacity of discharge of the apparatus is reduced and while parts are removed for cleaning a solid stream of sewage issues from the orifice and overdoses the filter bed in the vicinity of the nozzle. My invention overcomes these difiiculties and has various other advantages hereinafter to be pointed out.

The best forms of apparatus embodying my invention at present known to me are illustrated in the accompanying sheet of drawings in which,

Figure 1 is a vertical axial section of one form of apparatus taken on line 2-2 of Fig. 2. Fig. 2 is a horizontal section on line 11 of Fig. 1, looking downward. Fig. 3 is a vertical section taken on line 3-3 of Fig. 2. Fig. 4 is a vertical axial section of a modified form of apparatus with parts broken away. Fig. 5 is a vertical axial section of a second modified form, and Fig. 6 is a similar view of a third modified form.

Throughout the drawings like reference figures indicate like parts.

1, is the nozzle tip usually provided with a screw thread 2, so that it can be connected to the sewage discharging pipe which delivers an upward stream. Above the nozzle a tip and axially in line therewith is the usual spreader or deflector cone 3.

The problem is to so mount the inverted cone on the nozzle tip as to present the least obstruction to the discharge of solid matter, like bits of matches, the least friction retarding the velocity of the jet, and the least deformation of thespreading sheet of liquid which is to be broken up into as evenly distributed spray as possible. I accomplish a solution of these problems by supporting the inverted cone 3, by its tip 4:, mounted on a knife blade 6, set in the nozzle tip 1, diametrically thereof but preferably arched upward therefrom so that the jet of sewage can issuein a solid stream from the nozzle tip, not striking the cone tip or its supporting knife blade until it has cleared the nozzle tip.. The cone tip, which may be made separable and screwed on to cone 3, by threaded joint 5, as shown in Figs. 1 and 3, is preferably given an approximately elliptical cross section, as shown in Fig. 2, at and above its connection to knife blade 6.

The details of the attachment of knife blade support 6, to nozzle tip 1, may be various. In the form shown in Figs. 1, 2 and 3, which I call type A, the knife blade ends are soldered into slots 8, 8, in lugs 7 7 cast on either side of the nozzle tip. In the form shown in Fig. 41, which I call type B, the ends of the knife blade are carried farther down and cast, soldered or otherwise fastened to the upper edge of threaded collar 10, which screws on to a threaded boss 9, on the nozzle tip 1, so that the height of the spreader tip above the nozzle tip may be adjusted in the field. In the third form shown in Fig. 5, which I call type C, there are lugs 11, cast or otherwise, mounted on the knife blade ends and provided with claws 12, 12, on their under faces. The face of the nozzle tip 1, is then provided with recesses 13, 13, having partly undercut walls 14, 14, with which claws 12,12 cotiperate to form a bayonet joint. In the form shown in Fig. 6, which 1 call type D, the knife blade 16, is made straight, or nearly so and set in slots, 17, 17, in the face of nozzle tip 1.v At one end it is pivoted to the tip by pivot pin 18, and the other end has a projecting, threaded spindle 20, which fits in slotted lug 19, on the nozzle tip and carries a jam nut 21. In this form the cone tip 15, is extended beyond the knife blade into the nozzle bore, as shown.

In operation of types A, B and C, the sewage issues from the nozzle tip bore in a solid stream. It strikes the cone tip and supporting knife blade simultaneously and is formed into a spreading cone of liquid which is only slightly divided at two points by the knife blades. On account of the approximately elliptical cross section of the cone tip at the point ofinsertioninto. the solid circular jet, the walls of the fluid cone are thickest at the points where they are slit by the knife blades. Consequently, as the movingbody of fluid passes on and-strikes the spreading cone of circular cross. section beyond, these thicker walls arethinned down to an even thickness withthe other i portions of the fluid cone, and the slits made by the knife blades are healed .and .closed, so. that when the fluid cone. leaves the upper edge of spreader 3, it has walls of even thickness throughout and as it growsstill thinner.

breaks up into an even spray depositing like quantities 'of sewage in every unit are of dis.- tribution. -Type 'D,xdoes. not perform this function with quite the sameperfection, but approximates it. In types A, B and C, there is'little liability to clogging because there is no obstruction within the. nozzle bore, and any 'solidparticle escaping from the bore will easily pass on one side orthe other of the arched knife blade. If apiece of wood or similar object does lodge under the knife blade it can be easily poked outwith a stick, without putting ones fingers in the-spurting sewage. Also in types B. and C, more. serious clogging can be remedied by: removing. or loosening the. knife blade and cone, and then replacing. them. With type D, the liability. to clogging is greaterbut the remedy is easy as the nut 21, can be loosened and the knife blade and spreading cone...tipped to one side on pivot 18,. thus giving the.

nozzle full opportunity to free itself of the obstruction.

the. broken parts B and C, and new ones easily substituted. The parts are so compact, however, and the unsupported portion of the knife blade so short that there is littleliability to breakage, even when very thin blades are used. As thenozzle bore is free from all! obstructionand-the sewageissues in a solid-jet, fluid friction is reduced to a minimum andthe highestvelocity of discharge is realizedfor a given capacity of nozzle.

Experiments have shown that the best rep In case of breakage of. the. knife blade or cone tip, can be detached in types sults as to even distribution of spray and otherdesiderata are secured when the height of the knife blade arch bears a certain relation to the diameter of bore of nozzle tip. Thus when the nozzle bore is 3' inch the height of the arch should be inch, as shown in Fig. 1, whereas when the nozzle bore is inch, the height of the arch should be inch.

Various changes could be made in some of the details of construction shown so long as the operative relation of parts is retained sufficiently to embody the principle of my invention.

Having described my invention, I claim:

1. A nozzle for sewage spraying comprising in combination, a nozzle tip, a spreader cone having a tip of approximately elliptical cross section, and a knife blade support connecting the nozzle tip and spreader tip in line with the minor axis of the ellipse of the tip cross section.

2. A-nozzle for sewage spraying comprising in combination, a nozzle tip, a spreader cone having a tip of approximately elliptical cross section, and a knife blade support connecting the nozzle tip and spreader tip in line with the minoraxis of the ellipse of the tip cross section, said connection including a bayonet joint.

3. Anozzle for sewage spraying comprising in combination, a nozzle tip, a spreader cone having a tip of approximately elliptical crosssection, and a knife blade support connecting the nozzle tip and spreader tip in line with the minor axis of the ellipse of the tip cross section, said connection being detachable from the nozzle tip.

4. A nozzle for sewage spraying comprising in combination a nozzle tip free from internal obstructions, an arched knife blade mounted on said tip diametrically thereof, and an inverted spreader cone mounted on the knife blade and connected thereto at the exterior of the apex of the cone only, the axis of the cone being substantially coincident with the axis of the nozzle tip.

5. A nozzle for sewage spraying comprising in combination a nozzle tip, an arched knife blade. support set in the outer face of the nozzle, and a spreader cone supported atthe middle of the knife blade arch by engagement with the exterior only of the cone at its extreme tip.

6. A nozzle for sewage spraying comprising in combination a nozzle tip having its bore free from obstruction, a spreader cone outside of, and in the line of discharge from, the nozzle tip, and supports for said cone extending from the tip of the exterior of the cone to the exterior of the nozzle tip.

7. A nozzle for sewage spraying comprising the combination of a nozzle tip free from internal obstructions, an arched knife blade mounted on said tip diametrically thereof, and an inverted spreader cone mounted on the knife blade and connected thereto at the exterior of the apex of the cone, the axis of the cone being substantially coincident With the axis of the nozzle tip and the diameter of the nozzle orifice being considerably greater than the diameter of any portion of the cone which is in contact with the 10 knife blade structure. v

ARTHUR THEODORE NABSTEDT.

Witnesses:

HELEN PIERREPONT SNOW, R TH SNOW NABSTEDT.

Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Eatcntm, Washington, D. G.

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