US1394693A - Tbaveling scbeen foe suction-nozzles - Google Patents

Description

M. SWINTEK. TRAVELING SCREEN m sucno'u NOZZLES.

APPLICATION FILED FEB. 28, I920- Patented Oct. 25,1921,

UNITED STATES M AR'I'IN SWINTEK, OF'EDDYVILLE, IOWA.

TRAVELING SCREEN FOR SUCTION-NOZZLES.

Specification of Letters Patent.

Patented Oct. 25, 1921..

Application filed February 28, 1920. Serial No. 361,956.

To all whom it may concern:

Be it known that I, MARTIN SWINTEK, a citizen of the United States of America, and resident of Eddyville, WVapello county, Iowa, have invented a new and useful Traveling Screen for Suction-Nozzles, of which the following is a specification.

. The object of thisinvention is to provide means 'for screening the entrance to a nozzle employed in sand-pumping apparatus or dredges and removing large objects such as stones from said nozzle, which might otherwise clog the nozzle or pipes.

A further object of this invention is to provide a traveling screen traversing the mouth of a suction nozzle, such as is used in sand-pumping apparatus or dredges.

A further object of this invention is to provide a traveling screen traversing the mouth of a suction nozzle, and providing means on said screen for collecting and conveymg large ob ects, such as stone,wh1ch otherwise would obstruct or enter said nozzle.

My invention consists in the'construction, arrangement and combination of elements hereinafter set forth, pointed out in the claims and illustrated by the accompanying drawing,in which Figure 1 is a'plan and Fig. 2 a side elevation, partly in section, illustrating my improvement. Fig. 3 is a cross section on the indicated line 3-3 of Fig. 2, on an enlarged scale, the traveling screen being removed. Fig. 4- is a detail end elevation showing a screen roller and shaft on an enlarged scale. Fig. 5 is a plan of the elements shown in .Fig. 4. Figs. 6 and 7 are side elevations, on

an enlarged scale, of elements employed in the screen. I I v In the construction of the device as shown the numerals 10, 11' designate sections of a supply pipe leading to a pump (not shown) which preferably are made of metal and connected by an ofl'set section 12, the .section 11 terminating in a suction nozzle 13. This supply pipe and nozzle are of any suitable construction, except as hereinafter set forth and a flexible section 12 in the pipe 12 maybe made of metal joints pivotally connected or ofhose including rubber. The flexibility is provided primarily to per- 'mit the nozzle 13 to be raised and lowered in a body of water and relative to the sand or gravel bed thereof, such as a water-containing pit, pond, lake, beach or river where sand-pumping plants or dredges are operated. The lateral oflset section 12 is provided primarily to accommodate the screen and its mechanism hereinafter set forth. The nozzle 13 preferably is formed with a rectangular downwardly-opening mouth having its least dimension in a horizontal plane or transversely; and said nozzle is formed with integral wings 14, 15 flaring outwardly and extending forwardly and downwardly therefrom and terminating in curved outer margins forming runners adapted to engage and travel in the sand or gravel bed associated with the apparatus in use. Clamps 16, 17 shown generally in Fig. 2, are mounted on and fixed to the section 11 of the supply pipe. Each clamp (Fig. 3) is formed of two members, substantially alike, 18, 19 and each member has a central concaved portion 20 adapted to embrace and be clamped to the section 11 and arms at right angles to the horizontal diameter of said section, the arms being designated by the numerals 21, 22. Angle bars 23, 2 1 are mounted on and connect extremities of the arms 21, and channel bars 25, 26 are mounted on and connect the extremities of the arms 22. The channelbars also extend forwardly and rearwardly from the clamps and are curved at their extremities, the forward curved portions thereof extending aroundand on opposite sides of the mouth of the nozzle 13 and in close proximity to and between the wings 14, 15; The rearward curved portions of the channel bars 25, 26 extend around a shaft 27 mounted in suitable bearings at right angles to the section 12 of the pipe and at the rear of the section 12. End portions of the angle bars, 23, 24 connect and aline with end portions of the channel bars thus making substantially continuous tracks on opposite side of the section 11 and surrounding the section 12 of the pipe. Sprocket wheels 28, preferably two in number are mounted side by side on and fixed to the shaft 27, and a flexible screen, indicated generally by the numeral 29, is mounted in the tracks above described, extends around, and is driven by said sprocket wheels. The flexible screen is built up of links, pins, rollers and hooks and, in its entirety, constitutes a, chain belt adapted to be driven by the sprocket wheels, guided and supported by the tracks and traversing the mouth of the nozzle 13. The links 30 composing a considerable part of the screen are arranged alternately and pivoted at their ends on pins or shafts 31 and rollers 32, each formed with an annular recess 33 in its outer end, arepivoted on outer ends of said pins or shafts. The rollers 32 are held on the pins or shafts 31 by keys 34, holes 35 being provided in the rollers to facilitate placing and removing said keys, and said rollers confine the links 30 in proper relations. Some of the links, sometimes termed blocks, (see 35 in Fig. 7) are formed with out wardly extending hooks 36. The shaft 27 preferably is driven by gearing 37 37 at relatively slow speed from a shaft 38, the latter shaft being driven by a prime mover not shown, preferably by a belt 39. That portion of the screen 29 traversing the outer end of section 11 and nozzle 13 is carried entirely by the tracks formed by the angle bars 23, 24 and channel bars 25, 26 with their curved portions carried by the wings 14, 15.

In practical use the nozzle and forward portions of the tracks may be moved vertically in the usual way and the rollers 32 running in said tracks guide and direct the flexible screen or chain belt around and over the mouth of said nozzle. The hooks 36 successively stir and agitate the sand or gravel bed and facilitate entrance to the sand nozzle and pipe. At the same time the traveling screen prevents entrance to the pipe and nozzle of any objects too large to pass through the spaces of the screen, such as stones, sticks and lumps of clay, and the hooks engage and remove said large objects away from the nozzle. The hooks gather or accumulate some of the large objects and carry them upward and rearward away from the nozzle and deposit some of them at least at the rear of the shaft 27. Thus is provision made for screening the entrance of the nozzle and removing obstructions therefrom, at the same time permitting sand, gravel and water to enter the nozzle and pipe and be transported by the pump as desired.

Portions of the channel bars 25, 26 are cut away in the bottoms thereof in advance of the shaft 27 and portions are turned downwardly to form curved approaches 47, 48 at opposite ends of the openings. Thus provision is ,made for permitting portions of the screen to drop through leave and attain the lower track when said screen stretches in use, thus compensating for or taking care of slack formed therein.

I claim as my invention:

1. The combination with a suction nozzle adapted to be raised and lowered and formed with wings having curved outer margins beyond the mouth of said nozzle, track members being carried by inner faces of said wings around the mouth of said nozzle, of a flexibl screen mounted for travel longitudinally of said nozzle said screen also being directed for travel across the mouth of said nozzle and between said wings and supported in such travel solely by said track members.

2. The combination with a suction nozzle adapted to be raised and lowered and formed with wings havingt curved outer margins beyond the mouth of said nozzle, track members being carried by inner faces of said wings around the mouth of said nozzle, of a flexible screen mounted for travel longitudinally of said nozzle, said screen also being adapted for travel across the mouth of said nozzle and between said wings and supported in such travel solely by said track members, and projections on said screen extending beyond the mouth of said nozzle and beyond the outer margins of said wings.

Signed at Des Moines, in the county of Polk and State of Iowa, this 25th day of February, 1920.

MARTIN SWINTEK.

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