US1185821A - Dust-separator. - Google Patents

Description

G. L. PITTMAN & H. YOUNG.

DUST SEPARATOR.

APPLICATION FILED DEC. 30. 1915:

' Patented un 6,1916.

INZ NTORSL THE cuLumuA vLANocRAqfco WASHINGTON, n. c.

GEORGE L. PIT'IMAN AND HOMER YOUNG, OF BETHESDA, OHIO.

DUST-SEPABATOR.

Specification of Letters Patent.

Patented June 6, 1916.

Application fiIed December 30, 1915. Serial No. 69,351.

To all whom it may concern Be it known that we, GEORGE L. PITTMAN and HOMER YOUNG, citizens of the United States of America, and residents of Bethesda, county of Belmont, and State of Ohio, have invented certain new and useful Improvements in Dust-Separators, of which the following is a specification.

This invention relates broadly to dust separators, and more particularly to a device which is designed primarily for removing the dust from the tobacco in scrap tobacco factories.

The chief object of the invention is to provide a simple and inexpensive apparatus whereby the dust and fine particles of tobacco contained in the scrap as the same leaves the stein-cleaning scrap machine are effectually removed as the scrap tobacco is discharged from the conveyer leading from said machine to the drying room.

A further object is to provide a device of the character mentioned by means of which the separated dust is directed into a dust room or is conveyed to a point outside the building, thus not only providing against the air of the work-room becoming dustladen, a condition which has heretofore prevailed in scrap factories and which has been a source of much discomfort as well as great injury to the health of the workmen but also obviating the objectionable intermixture of dust with the scrap.

With these and other objects in view, the invention resides in the features of construction, arrangement of parts and combinations of elements which will hereinafter be fully described, reference being had to the accompanying drawings, in which Figure 1 is a top plan View of the invention; Fig. 2 is a longitudinal section of the same; Fig. 3 is a partial side elevation, enlarged; and Fig. 4 is a partial longitudinal section of the casing, showing the curved ends of its side-walls, the screen being shown removed.

Referring to said drawings, in which like designating characters distinguish like parts throughout the several views, 1 indicates a conveyer tube leading from the scrap-machine (not shown), through which the scrap tobacco is conveyed away from said machine under the impelling force of air from a blower 2 which is suitably connected to said tube, said parts being of the usual form.

In the present instance, the tube 1 leads to the device which-constitutes the present invention which is located within the drying room. Said device comprises a casing A, substantially rectangular in cross section, having its under side open. The tube 1 has its discharge end somewhat flattened and flared laterally to form a nozzle 3 having a long narrow throat 4, and it has said nozzle fitted into a slot 5 provided therefor in the rear wall 6 of said casing adjacent to the upper edge of said wall. The front ends of the side walls 7 of said casing are for wardly and downwardly curved from their upper to their lower edges, as shown at 8 in Fig. 4, to constitute a mounting for a transversely disposed screen 9 composed of fine wire mesh. A. transverse cleat 10 has its ends attached to said curved ends of the casing walls 7 adjacent to the lower edges of the latter, and the lower edge of the screen is interposed between said casing ends and said cleat, the latter serving to firmly hold said screen in place and also to form an abutment for the rear end of the lower wall of a downwardly inclined dust chute 11 which extends forward from said screen and opensthrough' a wall 12 of the building into a dust room or other suitable place. The rear ends of the side walls 13 of said chute extend back and lie against the outer faces of the side walls 7 of the casing A, as

shown.

Located within the casing slightly below the level of the slot 5 is a horizontal transversely disposed plate 14 the rear edge of which seats against the casing wall 6 and the front edge of which lies somewhat rearward with respect to the screen, there being thus formed between said front edge and said screen a somewhat restricted space or passage 00 through which scrap tobacco proj ected from the nozzle 3 against said screen may gravitate to the floor of the room or to a receptacle located on the floor.

Impelled forward by the blast from the blower 2, the scrap tobacco, together with the dust contained therein, is discharged from the nozzle 3 and is directed against the screen 9 with considerable force, said tobacco thence gravitating to the dryingroom floor through the passage between the screen and the front edge of the plate 14, while the particles of dust carried in suspension by the blast pass through the screen and into the chute 11, from the mouth of which they are discharged at a point outside said room. In practice, the air is directed forward with such force that practically none thereof passes downward with the tobacco, and, consequently, practically no dust is permitted to escape intothe drying room.

It is advantageous to employ a pivoted deflector 15 within the casing by means of which the blast may be deflected upward at an angle toward the top of the screen, as when the tobacco is of a heavy grade, thus somewhat retarding the discharge of the tobacco through the casing and facilitating the removal of the dust. Said deflector is fixed at its rear edge upon a rod or shaft 16 which is pivotally mounted in the walls 7 adjacent to the under edge of the slot 5 in the wall 6. Said deflector is provided with means whereby it may be held in adjusted position. Said means may be of any preferred character, that shown in the present embodiment consisting of a downturned spring arm 17 provided atone end of the rod 16, which arm is movable over the uneven face of a notched segment 18 carried by the outer face of one wall 7 What is claimed is- 1. A dust separator of the character described comprising, in combination with a conveyer tube, a casing having an entrance opening through which said tube discharges, an inclined dust chute fixed to the forward end of said casing and leading forward therefrom, the capacity of said chute gradually increasing toward the discharge end thereof, a screen disposed across the mouth of said chute, and a plate disposed within said casing below said entrance opening and terminating rearward of said screen to form an opening therebetween through which screened material may drop unobstructedly.

2. A dust separator of the character described comprising, in combination with a conveyer tube, a casing having an entrance opening through which said tube discharges, a dust chute having its receiving end fixed to the forward end of said casing and leading forward therefrom, said receiving end having greater'capacity than the discharge end of said casing and the capacity of said chute being gradually increased from its receiving end to its discharge end for affording an unobstructed passage for dust-laden air therethrough, and a screen disposed across said receiving end of said chute, the bottom of said casing terminating rearward of said screen to form a passage for screened material therebetween.

3. A dust separator of the character described comprising, in combination with a conveyer tube, a casing having an entrance opening through which said tube discharges, an inclined dust chute fixed to the forward end of said casing and leading forward therefrom, the capacity of said chute gradually increasing toward the discharge end thereof, a screen disposed across the mouth of said chute, a plate disposed within said casing below said entrance opening and terminating rearward of said screen to form an opening therebetween through which screened material may drop unobstructedly, and an adjustable deflector plate mounted over said first-mentioned plate whereby material to be screened may be directed toward the upper part of the mouth of said chute. In testimony whereof we aflix our signatures in presence of two witnesses.

GEORGE L. PITTMAN. HOMER YOUNG. Witnesses J. WV. PETERMAN, W. D. BoLoN.

series or this patent may be obtained for five cents each, by addressing the Commissioner of satenta.

Washington, D. 0.

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