US842036A

US842036A - Sieve-holder.

Info

Publication number: US842036A
Application number: US31116806A
Authority: US
Inventors: Edward J Vraalstad
Original assignee: BUFFALO PITTS Co
Current assignee: BUFFALO PITTS Co
Priority date: 1906-04-11
Filing date: 1906-04-11
Publication date: 1907-01-22
Anticipated expiration: 1924-01-22

Description

No. 842,036. PATENTED JAN. 22,. 1907.

E. J VRAALSTAD. SIEVE HOLDER.

APPLICATION IILED APB.11,19Q6.

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No. 842,036. PATENTED JAN. 22 1907.

E. J. .VRAALSTAD. SIEVE HOLDER. APPLIUATION FILED APR.11, 1906.

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EDWARD J. VRAALSTAD, OF BUFFALO, NEW YORK, ASSIGNOR OF ONE- HALF TO BUFFALO PITTS COMPANY, OF BUFFALO, NEW YORK, A (JOR- PORATION OF NEW YORK.

SIEVE-HOLDER.

Patented Jan. 22, 1907.

Application filed April llI 1906- Serial No. 311,168.

To all whom it may concern:

Be it known that I, EDWARD J. VRAAL- STAD, of Buffalo, in the county of Erie and State of New York, have invented certain new and useful Improvements in Sieve- Holders and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The object of this invention is to provide improved, simple, and highly-efficient means for securing the sieves or screens within a threshing-machine box or shoe, which latter, as is well known in the art of threshing machinery, has a vibratory or shaking motion. It is also well known that it is frequently necessary to change or replace the sieves and one of the objects of my invention is to enable this to be done with the least possible difficulty and while providing for differences in the lengths of the sieves avoid the use of springs or other parts liable to readilyget out of order or be deranged.

A further object is to provide simple and efficient means for looking the tail-rack in place.

The invention will be hereinafter fully set forth, and particularly pointed out in the claims.

In the accompanying drawings, Figure l is a longitudinal sectional view. Fig. 2 is an enlarged horizontal sectional view on line 2 2, Fig. 3. Fig. 3 is a View of the lock and. sieveholding plate. Fig. 4 is an enlarged fragmentary View of the tail-rack support. Fig. 5 shows the lock for the other end of the tailrack. Fig. 6 is a plan view thereof, partly in section. Fig. 7 shows the parts of Fig. 4 detached. Fig. 8 is a vertical sectional view on line 8 8, Fig. 6. Figs. 9 and 10 are details.

Referring to the drawings, 1 designates the ordinary sieve-holding shoe of a threshingmachine; 2, the top sieve 3, the lower sieve, and 4 a plate having seat-flanges 5 for supporting the sieves at one end.

7 designates a second plate for-supporting the sieves at their other ends. This plate is formed on its flat face with a lug 8, which extends into a slotted plate 9, secured over a slot in the side of the shoe, such lug guiding the plate and permitting it to turn axially to conform to the lengths of the screens. In this plate is formed an opening which receives and accommodates a boss 10 on the end of a longitudinally-movable lock-bar 12. It is this boss which forms the axial pivot for plate 7, the range of movement of such plate being limited by stop-lugs 13 thereof on opposite sides of the lock-bar. The latter is retained in place against the side of the shoe by a keeper 14. The rear half of this lock-bar occupies a plane parallel to the forward half, being bent laterally at about its center and thence on a straight line. This latter portion is equipped with a series of rack-teeth 15.

1 6 designates the lock for retaining thelockbar in position and for effecting its longitudinal movement in binding and releasing the sieves. This lock comprehends a circu lar disk 17, having on one face a hub 18, which projects through a hollow boss 19 of a flat plate 20, the latter being secured to the inner face of the side of the shoe, while the boss fits in a corresponding opening in such side. The disk 17 has a spiral flange or thread 21 for engaging the rack-teeth of the lock-bar, so that by turning such disk the bar will be moved longitudinally and transversely of the axis of such disk. The bar and the threaded disk are retained in place by a cap-plate 22, having diametrically 0pposite openings to permit of the passage of the lock-bar. Preferably the cap-plate is held in position by screws 23, which secure the plate 20 to the shoe, such screws being passedthrough coincident openings in the two plates. key 24 or other device into the opening of hub 18 the locking-disk 17 may be turned axially, and through its threaded engagement with the lock-bar the latter may be shifted to force plate 7 against or to release it from the ends of the sieves. In forcing the plate 7 home it will readily conform to the lengths of the sieves by reason of its pivotal connection to the lock-bar.

25 designates the tail rack, which is equipped at one end with a shouldered lug 26-, which fits in either of two seats 27 of plate 7.

By inserting a square-ended A flange 28 overhangs a portion of such seat, so as to retain the shoulder of the lug in place. At its other end the tail-rack carries an inverted-U-shape plate 29, secured in place by nutted bolts 30, passed through a flange thereof. The parallel portions of this U -shape plate have inwardly-extended flanges 31, formed near their upper ends with grooves This U-shape plate receives the in wardly-bent T-head 33 of a plate 3 1, secured to the side of the shoe by a nutted bolt 35, which bolt also retains a plate-spring 36, having a slot through which the T-head projects. Said head has two nibs or projections 37 facing the spring-plate, so that when the U-shape plate is forced down over the T-head such nibs will enter the grooves 32, being retained by the spring-plate, which is placed under tension by the positioning of the U-plate. From what has been said it will be seen that the tail-rack and the sieves may be readily removed or secured in position, and the parts are so constructed that even the constant use thereof will not effect their efficiency. The one plate serves as a support for both the sieves and tail-rack, and although it is positively locked in position it may readily accommodate itself to inequalities in the lengths of the sieves.

Although I have only shown and described the means for retaining the rack and sieves in position at one side of a shoe,it will be understood that the parts are duplicated on the opposite side.

I claim as my invention 1. A sieve holding device comprising a supporting-plate for a plurality of sieves, a longitudinally-movable lock-bar, and means connecting said bar to said plate, forming a pivot for the latter.

2. A sieve-holding device comprising a supporting-plate for a plurality of sieves, said plate having an opening therein, and a longitudinally-movable lock-bar having a boss fitting in said opening and forming a pivot for said plate.

3; A sieve-holding device comprising a supporting-plate for a plurality of sieves, said plate having an opening therein, and a guidelug, a slotted plate for said guide-lug, and a longitudinally-movable lock-bar having a boss fitted in said opening.

4.- The combination with the sieve-holding plate for engaging a plurality of sieves, of the lock-bar engaging with said plate, and a 1'0- tary lock for moving and holding said bar in different positions.

5. The combination with the sieve-holding plate, of the longitudinally-movable lock-bar engaging therewith, and a lock for engaging and moving said bar, said lock being rotatable at right angles to the plane of movement of the bar.

6. The combination with a plurality of sieves, and a holdingplate for engaging therewith, of the lock-bar with one end of which said plate has a pivotal connection, said bar having a series of rack-teeth, a rotary lock having a disk carrying a spiral thread or flange engaging said teeth, and detachable means for engaging and turning said disk.

7. The combination with the sieve-holding plate, of the lock-bar engaging therewith, and having a series of rack-teeth, a lock having a disk carrying a spiral thread or flange for engaging said teeth, said disk having a hub projecting therefrom by which it may be axially rotated, and means detachably engaging said hub for effecting such rotation.

8. The combination with the shoe having an opening in its side, of the sieve-holding plate, the longitudinally-movable bar engaging said plate and having a series of rackteeth, and a lock comprising a disk having a spiral thread for engaging with said teeth and a hub extending through said opening of the shoe, and a cap-plate for retaining the bar and disk in place.

9. The combination with the sieve-holding plate, and the longitudinally-movable bar engaging therewith having a series of rackteeth, of the lock comprising a plate having a hollow boss, a disk having a hub fitted in said boss and also having a spiral thread or flange for engaging said rack-teeth, a cap-plate having opposite openings to accommodate said bar, and means for securing said cap-plate, said means also retaining the lock in position.

10. The combination with the shoe having an opening in its side, and a slotted plate fitted in said opening, of the sieve-holding plate having a lug fitted in said slotted plate, the longitudinally movable lockbar engaging with said sieve-holding plate, and means for moving and retaining said lock-bar in different positions.

11. The combination with the sieve-hold ing plate having a seat therein, of the tailrack having at one end a lug fitted in said seat, and at its other end having a slotted plate, a retaining-plate having a T-head with which said slotted plate is designed to engage,

and a spring for holding said head and said latter plate together.

12. The combination with the shoe and the sieve-holding plate having a seat and a flange overhanging such seat, of a tail-rack having at one end a shouldered lug fitting in said seat, and at its other end a Ufshape plate, a plate secured to the shoe having a T- head for interlocking with said U-shape plate, and a spring-plate for holding the latter in engagement with said T-head.

13. The combination with the shoe and the sieve-holding plate having a seat and a flange overhanging such seat, of a tail-rack having at one end a shouldered lug fitting in In testimony whereof I have signed this said seat, and at its other end a U-shape plate specification in the presence of tWo subscrib- 10 formed with oppositely-extended flanges having Witnesses.

ing 'rooves near their upper ends, a plate haviig a T-head formed With nibs for enter- EDWARD VRAALSTAD' ing said groove, and a spring-plate for holding said U-shape plate in engagement With said T-head.

Witnesses:

JOHN B. OLMsTED, EDWARD F. HIOKMAN.