US1209873A - Hood for pneumatic stackers. - Google Patents

Description

G. B. NELSON.

HOOD FOR PNEUMATIC STACKERS.

APPLICATION FILED MAY12.1913.

1 209,873. Patented Dec. 26, 1916.

3 SHE'ETSSHEET l- G. B. NELSON.

HOOD FOR PNEUMATIC STACKERS.

APPLICATION FILED MAY 12. 1913- Patented Dec. 26, 1916.

3 SHEETS-SHEET 2.

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GEORGE B. NELSON, OF REDFIELD, IOWA.

HOOD FOR PNEUMATIC STACKERS.

Specification of Letters Patent.

Patented Dec. 26, 1916.

Application filed May 12, 1913. Serial No. 766,971.

Redfield, in the county of Dallas and State of Iowa, have invented certain new and useful Improvements in Hoods for Pneumatic Stackers, of which the following is a specification.

The main obj ects-ot this invention are to provide a hood that can be easily and quickly applied to the ordinary sizes of conveyor tubes; also to make such hoods revoluble; and further to provide a' novel means for securing a standard hood to any size of conveyer tube without in any way changing the hood.

It is also an object of this invention to make the type of hood revoluble' in which the hood is mounted to swing with respect to the conveyer tube and to provide a means for readily and quickly returning said hood to normal position after having been swung out of normal position, this, of course, being under the control of the operator.

The above features, and other capabilities and advantages of the invention will become apparent from a detailed description of the drawings showing a specific embodiment of the invention in which- Figure 1 is a perspective view showing a hood revolubly mounted on a conveyer tube. Fig. 2- is a top plan View of the same, and showing in dotted lines the position of the hood at right angles to normal position. Fig. 3 is a cross-section taken on the line 3-3 of Fig. 2 and looking in the direction of the arrows of such line. Fig. 4 is a crosssection taken on theline 4ll of Fig. 2 and looking in the opposite direction from that of Fig; 3, and Fig. 5'is a sectional view on the'line of Fig. showing in detail the connection between the hood and the conveyer tube. V

In the construction shown, a conveyer tube 10 is illustrated having a bead 11 around its periphery near its outlet end. The hood is secured to this outlet end of the conveyer tube; The hood 12 is shown hinged at 13, 13 to a rectangular head 14. By Ineansof a rope or cable having twobranches 15, 15, passing over sheaves 16, 16 secured to'the head 14:, and then over the sheaves 17, 17 each in the free end of an arm 18 pivoted one on each side of the hood 12, the hood may be swung about the hinges 13, 13; The head 14 is provided with a circular opening to receive the material being fed into the hood from the conveyer tube. This opening, which is preferably of a diameter equal to the average diameter of conveyer tubes, has an outwardly extending flange 19 formed around it.

To revolubly mount the hood 12 on a conveyer tube, a collar member is provided. This collar member is of such construction that a Standard sized hood, without in any way being changed, may be fitted to the various sizes of conveyer tubes. The collar member has an inner circular band 20 which has a flange 21 extending radially outward. On the outside of this inner band 20, the flange plates 22 may be provided. There are four of these plates 22 in the present embodiment. These flange plates 22 have a portion which lies flat up against the band 20 at which place the flange plates are riveted or otherwise secured to the band 20. Approaching the flange 21 of the band 20, the flange plates first make an outward bend away from the band and then after making a second bend, run parallel to the band 20 to form a channel between it and the band 20. These flange plates are also each provided with a flange which is parallel to the flange 21 of the band 20. Thus, an angular channel is formed. Obviously, instead of these flange plates 22 a complete annular band could be used. In this angular chan-' nel' the flange 19 of the headl l is secured and is there freeto revolve. To the end re .no ved from the hood on these plates 22, strips 2% may be secured, a strip for each plate. These strips extend a distance from the plates 22 and in the present instance, are provided with a bead 25 adapted to fit over the bead 11 of the conveyer tube 10 thereby to anchor the collar member onto the conveyer tube. A plate 26 is fastened to the middle of each strip 2 1 between the bead 25 and the plate 22. These plates 26 are of suflicient extent so that they will project one over each succeeding one to form a complete annular collar. When these collar members are fitted to the conveyer tube, the outward end of the plates 26 will lie under the band 20 and the inner end will lie on the outside of the discharge end of the conveyer tube. Thus, it will be seen with reference to Fig. 5, that material being fed from the conveyer tube to the hood will have no projections to encounter as the edges of the conveyer and the plates which lie on the inside, all extend outwardly in one di.

rection.

To bind the plates 26 onto the conveyer tube, tie-rods 38 are provided. A perch 27 having two openings 28, 28 'is provided on each of the strips 24. The end of a rod 38 is passed through each of these openings, one being the end of the rod connecting the strip with the preceding strip and the other being the rod connecting it with the succeeding strip. A nut is secured on each of these rods on the end thereof which projects through the perch 27, whereby the plates 26, may be tightly bound on the end of the con veyer tube. With this arrangement, it is obvious that the conveyer tube may be considerably larger or smaller than the normal opening formed by the plates 26, and the plates will still be enabled to form a tight connection between the hood and conveyer tube. Obviously another binding means may be used without changing the scope of the invention.

To revolve the hood in the angular groove formed by the bands 20 and 22, a rope or cable is provided having two branches, one 29 going to the left, and the other 30', going to the right of the conveyer tube. In the present instance, a sheave 31 is mounted in a housing 32 fixed on the raised portion of the band 22 over which the branch 29 of the cable passes and has its end secured in a lug 33 fixed at the lower end of the left side of the head 14. A second sheave 34 is mounted in a housing 35 fixed to the right of the housing 33 and over this sheave 34, the branch 30 of the cable passes and has its end secured in a similar lug 36 at the lower end of the right side of the head 14. Thus, it will be seen that by pulling on the cable 29, the left side of the hood will be raised and by pulling on the cable 30, the right side of the hood will be raised. v

The lug 33 projects sufficiently from the head 14 so that when the cable 29 is pulled,

this lug 33 will strike against the housing.

32 whereby the swing of the hood will be limited in that direction, and similarly, the housing 35 serves as a stop for lug 36 to strike against to limit the swing of the hood in the other direction.

The hood 12 after having been swung upward about its hinges 13, 13 by pulling the ropes 15, 15 may be returned to normal position by gravity. However, when the hood is revolved one-fourth the way around, the center of gravity of the hood has changed and the force of gravity will not be such as to return the hood to normal position. Therefore, a coil spring 37 is provided which is secured at one end to the upper portion of the hood 12 and at its other end to the head 14 which is, in the present instance,

secured to the fastening means of the sheaves 16, 16, whereby, when the hood is swung out of normal position and in a'position where the force of gravity will not operate to return it to normal position, the coil springs 37, 37, will operate to return the hood to normal position. Obviously, the springs 37, 37 also operate when the hood is in the position illustrated in Fig. 1, and consequently the return of the hood to normal position will be quicker and more effective than when the force of gravity alone were in play.

At the discharge end of the hood 12 there is secured a series of curved tines 39 fastened to the upper or curved side of the hood 12. These tines are designed to deflect the straw and: other substances blown through the tube in one direction while the blast of air is allowed to pass out through the tines.

At approximately the middle of each side of the hood 12 is secured a brace 54, which braces have a portion 40 hooked overthe upper side of the hood 12. To the middle of each of these braces is pivotal-1y connected the arm 18 heretofore described. A removable cross rod 41 connects the lower ends of the braces 54, 54. On each side of the head 14 is secured a supporting member 42 which is formed intoa loop at its upper end in which the arm 18 coijperates. The lower ends of these supporting members 42, 42 are connected by a cross rod 43 on which cross rod a sliding bottom 44 rests which is pivotally connected to the cross rod 41 and is adapted to slide over the cross rod 42 as the hood 12 is swung about hinges 13, 13. This sliding bottom 44 serves to regulate the direction of blast as the hood is swung about the hinges 13, 13. V

The cross rod 45 connects the two hooked portions 40, 40 and has fixed on it a pulley 46 and is controlled by a coil spring 47. In channels 48, 48 one on each side of the upper curved portion of the hood 12, a metal curtain 49 is slidably .mounted. This curtain 49 has a turned up flange 50 at its rear end. At about the middle of this flange 50, arope or cable 51 is connected which passes under a sheave 52 mounted on the upper side of the head 14 and then passes rearward to the position of the operator. A thin rope or. cable 53 has one, end connected to the pulley 46 being adapted to wind around such pulley and then passes rearward and is connected to the flange 50. This arrangement is such that when the cable 51 draws the curtain 49 rearward, the cable 53 will rotate the pulley '46 and put the coil spring 7 bodiment of the invention, it is to be understood that various changes and modifications may be made by those skilled in the art without departing from the general scope of the invention. 7

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In a stacker hood, a collar adapted to be attached to a conveyer tube, said collar being provided with a channel at its outer end, a hood provided with a head set at substantially right angles to said collar and having an opening to communicate with the tube, said head being provided at its opening with an outwardly projecting flange at substantially right angles thereto to travel in the channel of said collar.

2. In a pneumatic stacker hood, an adjustable collar adapted to be attached to various size conveyer tubes, a channel provided in the outer end of said collar, a hood having the head set at right angles to said collar and provided with an opening to communicate with the tube, said head being provided at its opening with an outwardly extending flange at substantially right angles thereto to travel in said channel whereby the hood may be revolved.

3. In a pneumatic stacker hood, a collar adaped to be attached to a conveyer tube, a channel provided in the outer end of said collar, a head set at substantially right angles to said tube and provided with an opening to communicate with the conveyer tube,

Copies of this patent may be obtained for five cents each, by addressing said head having at its opening an outwardly extending flange at substantially right angles thereto designed to travel in said channel.

4. An adjustable collar for conveyer tubes composed of a band to receive a hood, strips rigidly connected to said band, plates connected to said strips, said plates being adapted to receive the conveyer tube, and means for clamping said plates tightly around said conveyer tube.

5. A collar for the outer end of conveyer tubes composed of a band provided with a channel to receive a stacker hood, flexible strips rigidly connected to said band, plates connected to said strips, said plates being adapted to receive the conveyer tube, and tie-rods connected to said strips for clamping said plates around said conveyer tube.

6. A collar for the outer end of conveyer tubes composed of a plurality of plates adapted to be tightened around the end of the conveyer tube, a strip connected to each plate, and a band connecting all of said strips together, said band having angular groove portions in which a hood may be mounted to revolve.

In witness whereof, I hereunto subscribe my name to this specification in the presence of two witnesses.

GEORGE B. NELSON.

lVitnesses CHRIS DANIELSON, It. S. BENJAMIN.

the Commissioner of ratents,

Washington, I). G.

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