US1670424A - Plowshare with removable point - Google Patents

Description

May 22, 1928.

J. SANDERS PLOWSHARE WITH REMOVABLE POINT Filed May 5, 1927 gwvwtom 10/1/12 Ja/mi'm.

Patented May 22, 1928.

1,670,424 UNIT D STATES PATENT OFFICE; A

JOHN SANDERS, or-mnann, camronnra.

LQWSHARE W TH Application filed May 3,

i This invention relates to improvements in plowshares with removal'ile points and is an improvement on United States Letters Patout No. 1,511,301, granted to me October 1 1. 19.24.

f It is well known that the plow point s the part of the plow that wears away fastest and when the points are integral with the share, the whole plow hare must be re moved in order to sharpen or repair the point. 7 i

It is evident that if the pointcanbe readily removed from the share and replaced thereon, that a new point can be substituted for the dull or broken or bent point w thout making it necessary to remove tl1e plowshfil l The desirability of mak ng plowshares with removable points has long been recognized and several attempts have been made to reduce a satisfactory construction. It is the objectof this invention to pro.- duce a plowshare having a removable point and which shall be so constructedrthat the point can be removed from or applied to the share quickly and with a. small amount of labor and which, when in place, will be firmly and securely held in place.

The above and EOfiher objects which may appear hereinafter are attained by means of a construction and an arrangement of parts that will now be described in detail, and reference for this purpose will be had to the accompanying drawing in which the preferred construction has been illustrated and in which:

Fig. 1 is a top plan View of my improved plowshare; i

Fig. 2 is a bottom plan view of the front end of the plowshare showing the detachable point in place; 1

,Fig. 3 is a section taken on line 3--3, B 1g. 1; and

Fig. 4 is a section taken on line 4-4, Fig. 3. r v

Numeral 1 represents the share and 2 the landside, while numeral 3 represents the removable point as a whole. The plowshare and its attached point has the same s1ze and shape as plowshares that are unitary and the difference resides in the construction which has been resorted to for the purpose of detachably securing the point 3 in place. The plowshare terminates at line 4. and is provided atits forward end with a depression or recess bounded on two sides by the walls 5 and 6 The bottom of this recess is "12 and is therefore so located REMOVABLE romrr.

1921, Serial lilo/188,425.

portion 12, that lies within the recess that is bounded by the wallsb surface of part 12 fits against the upper surface of part 7 and is provided with a rectangular tongue '18 that, fits into the rabbet lOIFig. 4). The front end of the plow point is wedge-shaped (Fig. 3); but the plane under surface terminates in a wall comprising portions 14:, 15 and 16, which engage corresponding surfaces of the plows share. The upper end of part 12 is provided with a tongue 17, which extends through the opening 9, when the oint is in position. The upper surface in the plane of ,the under surface of part and 6. The under gage the surface 8. Whenthe point is put into place, its rear end will engage wall 5 and wall 14 will engage the end wall 1; it is therefore held positivelyagainst rearward movement with respect to the plowshare. Hook 17 holds the rear end of the plow point against upward movement and a pin 18secures the point to the part 7. Pin 18 extends through part 7 and is perforated for the reception of a cotter pin 19. The under surface of part 7 has a groove 20 for .the reception of the pin 19.

'When the point is to be removed, the cotter pin 19 is first of all removed so as to permitpin 18 to be removed. 18 has been removed, the point can then be removed by merely raising the front end upwardly a sufficient distance to permit the tongue 17 to be withdrawn from the open ing 9. A new pointcan be quickly put into place as it is merely necessary to see that all of the surfaces are clean and then to insert the tongue 17 into hole 9 after which pin 18 is put into place and fastened by means of the cotter pin 19. Since there is no force which tends to move the point upwardly, there is no strain on pin 18. The point can be put into place and removed without use of any tools other than a pair of pliers for terminates in line I of hook 17 lies that it will en- After the pin handling the cotter pin and perhaps a hammer.

I want to call particular attention to the manner in which the point is held against turning. The tongue 13, which lies in rabbet 1O prevents the point from turning in a clockwise direction (Fig. 1) and shoulder 15 prevents counterclockwise movement. The pin 18 serves merely to hold the point from moving upwardly and is therefore subjected to very little strain. The recess in the upper surface of the share is deep enough to receive the part 12 so that the upper surface will be smooth and even. The assembled plowshare has the same shape and appearance as a plowshare having an integral point.

Having described my claim as new is:

1. A plowshare provided with a depressed portion in its upper surface adjacent the point, said depressed portion being bounded on two sides by wall surfaces, said plowshare having an opening in the bottom of the depressed surface, a removable point having a rearward extension adapted to fit in the depressed portion. a tongue extending rearwardly from the rear end of said extension, said tongue being adapted to project through the opening and to engage the under surface of the plowshare and a removable pin extending through the plow point and through the bottom of said depressed portion.

2. A plowshare provided with a depressed portion in its upper surface adjacent the point, said depressed portion being bounded invention what I on two sides by wall surfaces, said plowshare having an opening in the bottom of the dcpressed surface the side of said depressed portion nearest the landside being provided with a ra-bbet a removable point having a rearward extension adapted to fit in and to fill said depressed portion, the rear end of said extension having a tongue extending rearwardly and adapted to pass through said opening, said rearward extension being also provided on its under side with a tongue adapted to fit said rabbet and a pin extending through the plow point and through the bottom of said depressed por' tion.

3. A. plowshare having a removable point, said plowshare being provided near its point with a depression bounded on the rear and one side by substantially vertical sides, said depressed surface having an opening at the rear end thereof, a rabbet extending along one side of said depression. a point having a. transverse wall adapted to engage the front end of the plowshare, a rearward extension adapted to engage in said depression, an elongated tongue adapted to cooperate with the 'abbet, a tongue extending rearwardly from the rearward extension and.

adapted to project through said opening the bottom of said depression and the rearward extension being provided with registering openings for the reception of a pin and a pin extending through said registering openings.

In testimony whereof I aiIix my signature.

JOHN SANDERS.

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