US1025290A - Screen for screening or sifting sand, gravel, stone, and other matters. - Google Patents

Description

. E. NEW. SCREEN FOR SCREENING OR SIFTING SAND, GRAVEL, STONE, AND OTHER MATTERS.

APPLICATION FILED DBO. 9, 1911.

1,025,290. Patented May '7, 1 912.

TTQJIj UNITED STATES PATENT OFFICE.

EDWARD NEW, OF HAMILTON, ONTARIO, CANADA.

SCREEN FOR SCREENING OR SIFTING SAND, GRAVEL, STONE, AND OTHER MATTERS.

Specification of Letters Patent.

Patented May '7, 1912.

Application filed December 9, 1911. Serial No. 664,706.

T 0 all whom it may concern:

Be it known that I, EDWARD NEW, a subject of the King of Great Britain, and resident of Hamilton, in the county of entworth and Province of Ontario, Canada, have invented new and useful Improvements in Screens for Screening or Sifting Sand, Gravel, Stone, and other Matters, of which the following is a specification.

My invention relates to a screen loosely suspended at an angle, or incline, and adapted to swing or oscillate sidewise, and means to cause the upper part of the screen to adruptly stop, at or about the termination of each swing, and means to cause the lowerpart of the screen to simultaneously swing in an opposite direction.

The ob ects of my invention are first, to

provide an inclined screen adapted to swing,

or oscillate, and to jar in such a manner that the fine parts of the sand and gravel shall be loosened from the coarse parts thereof, and thereby screened, second, to provide a screen, the upper portion of which is adapted to swing transversely, and the lower portion to swing simultaneously therewith in opposite directions; third, to provide a screen comprising sections of different fineness and coarseness of wire-mesh, and adapted to screen different grades of sand, gravel and stone through said sections; fourth, to pro vide a screen adapted to oscillate and to be suddenly restricted in its motion thereby causing the same to jar, or bump, at a predetermined position of the travel of the screen, thereby loosening the material being screened and causing rapid disintegration of said material.

I attain these objects by the mechanism illustrated in the accompanying drawing in which Figure 1 is a face elevation of the screen, loosely suspended from framework, the lower portion of the screen being pivotally connected to said framework and with means for swinging, or oscillating the screen. Fig. 2 is a sectional side elevation of the screen, in an inclined position, showing the oscillating center.

Similar characters of reference refer to similar parts throughout the several views.

In the drawing the removable screen is illdicated by 2, and is made preferably in three sections of wire screen varying in mesh, for instance, fine, intermediate and coarse respectively, the fine section being the upper one, all of which fit snugly in a suitable frame 3, and which may be removed when worn out, and replaced by new ones,

- in said frame.

of the two chains, as shown, but if one central chain were preferred the end of rod 9 would be connected therewith.

It will be noticed in Fig. 2, that the screen frame is suspended at an incline or angle in order that a portion of the material loaded or dumped therein for screening purposes, may roll down, and consequently fall from off the open lower end thereof.

6, is a rigid transverse bar, of the framework 4, or other suitable block, adapted to receive a pivotal pin 7 which extends from the rear side of the screen-frame, said pivot is adapted to oscillate in said transverse bar or block.

8 is a transverse bar, or rod, which connects the chains 5 together, and 9 is a connecting rod pivotally connected to the bar 8. The opposite end of said rod is j ournaled to the disk 10 by means of its eccentric pin 12. The disk is secured on its concentric shaft 13, which is journaled in the suitable framework 4, in the usual manner of journals and stationary bearings for shafts. The disk 10 may be rotated by means of a belt 15, or by any well known means for to tating a shaft, and pulleys. The disk 10, has holes 11, at varying distances from its concentric shaft 13, adapted to receive the eccentric pin 12, of the disk to allow the connecting rod 9, to be connected thereto, thereby providing means to allow more or less throw, or stroke, to the rod 9, hence more or less oscillation to the screen frame.

16 and 16 are rigid stopblocks, preferably of wood, and are adapted to allow the ends of the upper part of the screen-frame to jar or bump abruptly and alternately against said blocks, at each stroke of the connecting rod 9, in order that said jar shall be sudden, abrupt and pronounced. The flexibility of the suspended chains 5, afiord means to allow the bump of the screen frame, against the blocks 16, at each stroke of the reciproeating bar 8, and the connecting rod 9. The jarring, or bumping, of the upper end of the screen frame is an important feature in this invention, for the reason, that the material to be screened and which is dumped in the upper end part of the screen frame can be more readily disintegrated and screened, than could otherwise be accomplished.

It will be noticed that the lower end of the screen-frame oscillates simultaneously with the upper end part thereof, and in opposite directions, and said lower end partmay have more or less corresponding oscillation, depending on the positions of the pivot 7.

I prefer to locate the pivot 7, at about two-thirds distance of the length of the screen-frame, measuring from the top thereof. The two-third distance, referred to, has been practically tested with good results, though said location of the pivotal center 7, may be higher or lower, to cause more or less vibration to different portions of the screen. Bins to receive the varying grades of sand may be placed under the screen, and immediately opposite the respective fine and coarse sect-ions of screens, as set forth.

lVhat I claim as my invention and desire to secure by Letters Patent, is

1. In a screen of the character described, a stationary frame, an inclined screen, or

' sifter, chains connected to said frame and to the upper parts of the screen to suspend the same, a transverse bar connecting said chains, reciprocating means pivotally connected to said bar adapted to vibrate the screen transversely thereto, and rigid blocks on said frame adapted to receive the upper and opposite parts of the screen to cause an abrupt jar to the same.

2. In a screen of the character described, a stationary frame, an inclined screen, flexible means connected to the frame and to the screen to suspend said screen, a transverse bar connecting said flexible means together, means connected to said bar adapted to reciprocate the same, thereby vibrating the screen, and means on the frame adapted to allow the screen to jar therewith at each stroke of the reciprocating means, thereby loosening the material in the screen.

3. In a screen of the character described, a stationary frame, an inclined screen, means on the lower and rear part of the screen and on the frame, adapted to allow the screen to oscillate thereon, flexible means connected to the frame and to the upper portion of the screen, a transverse bar connecting said flexible means, reciprocating means connected to said bar adapted to oscillate the screen, and thereby loosen the material therein.

4. In a screen of the character described, a stationary frame, an inclined screen, means on the lower rear portion of the screen, and on the frame, adapted to allow the screen to oscillate thereon, flexible means connecting the upper part of the screen with the frame, means connected to said flexible means adapted to vibrate and oscillate the screen and stationary means on the frame at a predetermined distance from the screen, adapted to contact with the upper part of the screen to bump and jar the same.

5. In a screen of the character described, a stationary framework, an inclined screenframe, removable sections of screens therein, means on the underside of the screen frame and on the framework to support the screen-frame and to allow the same to oscillate, suspending means connected to the screen-frame and to the frame work, reciprocating means connected to said suspending means adapted to oscillate the screenframe, and means on the stationary framework adapted to receive the screen-frame at or near the terminus of its oscillatory motion, thereby causing abrupt jars to the screen-frame.

6. In a screen of the character described, a stationary frame, an inclined screen, means on the lower and rear part of the screen and on the frame adapted to allow the screen to oscillate thereon in opposite transverse directions, flexible means loosely connected to the frame and to the upper part of the screen, reciprocating means connected to said flexible means adapted to oscillate the screen in opposite transverse directions to predetermined distances, and to cause abrupt termination of the oscillatory movement of the screen, thereby loosening and sifting the material in the screen.

EDWARD NEIV. Witnesses JOHN H. HENDRY, RICHARD BUTLER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C.

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