US821502A - Screen. - Google Patents

Description

PATENTED MAY 22, 1906.

J. KEFFLER. SCREEN.

APPLICATION nun 0017. 1905.

' ing had to the annexed of reference marked thereon,

. portion of one ofbars. Fig. 4 is an enlarged view showing a I portion of the fixed 'wir manner of. fastening same 1 ajlongitudinal thefupper wire-holding head and the wireholding thread bar-and illustrating manner of, attaching the wire-holding-thread bar to PATENT OFF-Ion.

JOSEPH KEFFLER, OF MALVEltN, OHIO;

SCREEN.

Specification of Letters Patent. Application filed October 7, 1905; Serial No. 281.829.

iratented May 22, 1906,

.l'0 all whom it mag concern:

Be it known that I, JOSEPH KEFFLER, a citizen of the United States, residing at Malvern, in the countyof Carroll and State of Ohio, have invented certain new and useful Improvements in Screens; and .I do hereby declare that the following is a full, clear, and exactdescription of the same, reference bedrawings, making a and to the numerals in which- Figure lis aperspective view. Fig. 2 is a longitudinal section showing portion broken away. Fig. 3 is an enlarged view showing the thread and wire holding part of this specification,

-holding head and '."*illustrating the posit on of the wire-thread-.

holding bar.- Fig. 5 is a bottom or under side view of thefixed wire-holding head. Fig. 6 is a longitudinal section showing a portion of the fixed wire-holding head and illustrating to one of the side members of the frame, also showing portion of the wire-threadholding bar. Fig. 7 is a longitudinal-section showing a portion of the upper or; adjustable wire-holding head and a portionof thewi're-holding-thread bar and-illustrating manner of attaching the saniegto the side bars of the frame. Fig. 8 is section showing a portion of hehe d. Fig. 9, is a view showing a portion of oneof the screen-wires-and its attachingoop. The present invention has relation to screens; and it consists m the novel arrangement hereinafter described, and particularly pointed out in the claim.

Similar numerals of, reference indicate corresponding parts in all the figures of the drawings.

The object of the resent invention is to provide means by w ich a uniform tension can be iven to the various screen-wires, reference eing had to any slight variations in the texture of the various wires composing the screen. i 1

In the accompanying drawings, '1 represents the side members of the screen-frame,

which may be of: any desired length, reference being had to' the length of the screen designed -to be constructed. Thegsideme'mbers 1 are held inproper-spaced' relation-Joy;

3, together with the lower wire-thread-holding bar 4, and such other tie-bars as may be spaced relation. For the purpose of providing a means for giving the screen-wires 5 a uniform tension they are located near the extreme ends around the wood bars 3 and 6, and for the purpose of securely connecting the ends of the wires '5 the metal plates 7 and 8 are provided, which metal plates are so located that their outer edges will not come in contact with the wires 5 at the outer edges of the wood bars 3 and 6 and are so located for the purpose of providing a wood contactplate against the wires at the direct-pulling points of said wires. For the purpose of preventing any springing of the bars 3 and 6 when strain is placed upon the wires 5, as hereinafter described, the metal bars 9 and 10 are employed and are located in contact with the wood bars 3 and 6, as illustrated in Figs. 1, 4, and 5. The side members 1 are provided with the elongated slots 11, through tend and are extended a short distance beyond the bars 1 and are so extended for the purpose of attaching the yokes 12, which yokes are provided with the screw-threaded rods 13, which screw-threaded rods are passed through are provided with the adjustingnuts 14.

It will be understood that by rotating the nuts '14 in one direction the bars 6 and ,10 will be moved away from the fixed wire-holding head proper, thereby changin the disand 6, and by reason ing attached to suitable posts 15, which posts are connected to which-metal plates are securely attached to the bars 3 and 6 in any convenient and wellknown manner.

. It will be understood that by employing .the wood bars 3 and 4 and locating the screen wires upon the edges of said wood bars the wires will be when heavy strain is brought upon them embedded in the wood to a certain extent, and the greater the strain of any sin le wire the greater depth the wire will be emhedded, and owing to the difference in the depth of embedding the wires in the wood the wires can all be brought to the same (Eli?- gree of tension, by which arrangementno erenceexists as to tension between any the "wires composing the screen.

necessary to hold the side members 1 in proper which elongated slots the bars 6 and 10 eX- the tie-bar 2 or its equivalent and I suitable tie-bar 2 the fixed wire-holding bar tance between the outer edges of t e-bars 3 i of the screen-wires 5 bev the metal plates 7 and 8, .j

IIO

r g! all of the wires It will be understood that wire of the same size and material varies owing to the difference in the texture of the wire at different points, notwithstanding the fact that the wire is of the same size and material, and that by reason of this difference when wire is cut from a long strip into given lengths one of the lengths of the wire may stretch more than another when tension is applied of equal degree to all of the wires, an y the difference of the stretching of the different wires the result of embedding the different wires in the wood bars is varied, by which arrangement a uniform tension is brought about. Of course 5 are to be provided with suitable eyes 16 for the purpose of connecting them to the post 15. This, however, is common.

In the employment of screens of the class described to which this invention belongs the material designed to be screened is frequently fed by means of an elevator with a spout intervening between the elevator-buckets and the screen, and in order to better distribute the material designed to be screened as it passes from the feed spout or board 17 onto the headboard 18 of the screen the wheel 19 is employed, which wheel is provided with any desired number of curved blades 20, said wheel being so adjusted with reference to the headboard 18 that the curved blades 20 when brought into their lowermost position will come in close contact with the headboard 1S, and by the movement of the material designed to be screened the wheel 19, together with the curved blades 20, will be rotated by the material coming in contact with said blades. For the purpose wires 5 in proper spaced relation with reference to each other the screw-threaded bars 4 and 4 are provided. However, these bars need not necessarily be screw-threaded; but they should have spaced grooves to receive the wires, and it is more convenient to form the grooves screw-threaded than otherwise. The screw-threaded bar 4 is secured to the wood bar 6 by means of the rivets 23 and is so connected for the purpose of providing a means for the screw-threaded bar 4: to follow the bar 6 during the time the wires 5 are being brought into proper tension.

of holding the For the purpose of preventing any portion of the material being screened from finding its way upon the top of the wood bar and the screw-threaded bar 4 the cover 24 is provided.

In Fig. 1 the cover=plate is shown removed;

but its position is fully illustrated in Fig. 2 in cross-section and attached to the side members 1 in any convenient and well-known manner.

It will be understood that I do not desire to be confined strictly to wood as to the formation of the bars 3 and 6, as it will be understood that any material capable of allowing the wires to be embedded will answer to the same purpose as that of wood.

For the purpose of suspending the screen proper rods, such as 25, may be employed, which are suspended from suitable framework of any desired construction.

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

In a screen of the class described, the combination of a suitable frame, wire-supporting bars provided with spaced grooves, said bars secured to the side members of the frame near the end thereof, non-metallic bars located near the ends of the frame, metal bars located against and in contact with the inner l edges of the non-metallic bars, one of the metal and non-metallic bars adjustable with reference to the frame, means adapted to embrace the adjustable metal and non-metallic bars, metal plates secured to the non-metallic bars and their outer edges located in different vertical planes from that of the outer edges of the non-metallic bars, screen-wires seated a ainst the outer edges of the nonmetallic ars, and means for holding the adjustable non-metallic and metallic bars in fixed adjustment, substantially as and for the purpose specified.

In testimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses.

JOSEPH KEFFLER.

Witnesses OnAs. LOEHR, CALVIN LOEHR.

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