US787840A

US787840A - Scraper for disk harrows.

Info

Publication number: US787840A
Application number: US24673105A
Authority: US
Inventors: Charles P A Friberg
Original assignee: DEERE AND MANSUR Co
Current assignee: DEERE AND MANSUR Co
Priority date: 1905-02-21
Filing date: 1905-02-21
Publication date: 1905-04-18
Anticipated expiration: 1922-04-18

Description

PATENTED APR. 18, 1905.

C. P. A. PRIBERG.

GRAPBR FOR DISK HARROWS APPLICATION FILED FEB. 21. 1905.

Patented April 18, 1905.

FFICEG CHARLES P. A. FRIBERG. OF MOLINE, ILLINOIS, ASSIGNOR TO DEERE ANI) MANSUR COMPANY, OF MOLINE, ILLINOIS, A CORPORATION OF ILLINOIS.

SCRAPER FOR DISK HARROWS.

SPECIFICATION forming part of Letters Patent No. 787,840, dated April 18, 1905.

Application filed February 21,1905. Serial No. 246,731.

Be it known that I, Crranmns P. A. FRIBERG, 1 a citizen of the United States,res1ding at Mo- I that are secured in various ways to the scraper-shaft, and the shaft is mounted in bearings on the barrow-frame and provided with means wherebv it may be rocked.

There is one scraper for each disk, and the object in rocking the shaft to cause the blades to sweep across the face of the disks to scrape off the adhering dirt, weeds, Sac. The blades are usually made of flat plates of steel having a certain degree of flexibility and press elastically against the face of the disks. It is desirable that they should be separately and individually adjustable along theirshaft, and it is also desirable that each blade should be detachably secured to the shaft, so as to permit it to be readily removed and restored to place or replaced by another.

The present invention comprises a means for securing these scraper blades to their shaft, and it is characteristic of the invention that a single means or device is provided to effect both the securement of the scraper to its shaft and the detachable fastening of the blade to its clamp.

The invention is illustrated in the accompanying drawings, wherein Figure I shows a portion of a disk harrow in side elevation, and Figs. 2 and 3 respec tively show face and edge views of one of the scraper-blades and the clamp which secures it to the shaft.

Referring to the views, (I indicates the usual, in bearings on the harrowframe and is provided with an upwardly-extending footlcver g. The shaft has also a rearwardly-extending armf and a spring e, which reacts between the end of this arm, and a bracket a on the harrow-frame serves to hold the shaft normally in such a position that the scraperblades are held with their point near the center of the disks.

The scraper extends radially from the shaft, as usual, and normally occupies the position illustrated in full lines in Fig. 1 but by pressing his foot upon the lever g the driver may rock the shaft against the tension of the spring 6 and cause the scraper-bhulc to sweep rearwardly against the face of the disk, as above described.

The scraper-shaft is preferably angular or square in cross-section, as illustrated in all the ligures, and each blade is secured thereto by means of a clamp 7L, consisting of two oppositely-disposed jaws i i, which are shaped at their upper ends to fit the shaft and con structcd at their lower ends to clamp the blade between the two jaws.

As illustrated in Figs. 2 and 3, each jaw of the clamp is slotted or recessed on its inner side to receive the upper end of the blade edgewise, and a single bolt 7): clamps the two jaws together around the shaft and on opposite edges of the blade, so that on loosening the bolt the clamp carrying the blade may be adjusted along the shaft and so, also, that by stillfurthcr loosening the bolt and separating the jaws the blade may be entirely detached from the clamp.

In order to fasten the blade securely to its clamp, its opposite edges near the upper end are notched or cut away, as indiacted by dotted lines at Z in Fig. 2, and the recesses in the jaws of the clamp are provided with corresponding lugs or projections in, that [it into the notches or cuts in the blade when the two jaws are clamped together and positively hold the blade against longitudinal movement in the recesses of the jaws.

Such being the construction and the manner of securing the clamp to the shaft and the blade to the clamp, it is to be noted that the invention provides in a single device a simpl and effective means for securing and adjusting the blade and clamp along the shaft and also for detachably securing the blade to its clamp or holder, and the same fastening viz,, the bolt kserves to effect both attachments-that is to say, it secures the clamp to the shaft and fastens the scraper-blade to the clamp.

Having thus described the invention, what I claim, and desire to secure, is

1. The combination of a scraper-shaft, a scraper-blade, and a pair of clamping-jaws forming a single means to'secure the scraper to the shaft, and to detachably fasten the blade to the clamp.

2. The combination, to form a means for securing a scraper-blade to its shaft, of a pair of jaws having one end fitting the shaft, and the other fitting the blade, and means for clamping the aws together on the shaft with the blade between them.

3. The combination, to form a scraper with a detachable blade, of a pair of jaws i, i, recessed to receive the blade edgewise, a scraper-blade having notches or cuts Z, Z, in its edges, projections m, 'm, in the recesses of the jaws to fit the notches in the blade, and means for clamping the aws together.

In testimony whereof I affix my signature in presence of two witnesses.

CHARLES P. A. FRIBERG.

Witnesses:

N. GALVIN, J. W. SELLS.