US1036675A - Moldboard. - Google Patents

Description

o. K. MILLER.

MOLDBOARD.

APPLICATION FILED SEPT. 5, 1911.

Patented Aug. 27, 1912.

`INVENTUR C/zareJM'ZZer WlTNESSES a uuiTEn sTATEs PATENT oEEioE CHARLES K.. MILLER, OF WAXAHAGHIE, TEXAS, ASSIGNOR 0F ONE-THIRD TO R. J'. COLEMAN AND ONE-THIRD T0 W. A. MARTIN, BOTH 0F WAXAHACHIE, TEXAS.

MoLDBoARD.

Specification of Letters Patent.

Patented Aw?. 27,1912.

Application led. September 5, 1911. Serial No. 647,559.

more` particularly to certain improvements.

upon the 'consti-notion covered by the applicants previous application "tiled April 1, 1911, under Serial Number 618,365.

The primary object of the invention is to provide aA mold-board to which the earth will not adhere.

In working certain kinds of land, such as black waxy l land', or in plowing fields that are wet andmuddy, the upturned earth has 1a strong tendency to adhere to the moldboard on a plow, producing the necessity of frequent cleaningr and somewhat increasing the draft. lt has been found that this tendency mayA be overcome by providing the mold-board of a plow with a facing of material, such plaster-of-Paris, which will readily shed the earth, and will not require any ,cleaning if kept slightlyvmoist. But it has been also found that after -a mold-board of this description has been used upon a plow for sometime, the plaster-of-Paris coating is apt to become quite dry, and under suoli circumstances, the material loses to some extent its ability to scour, or to shed the earth. In usingsuch a mold-board therefore it becomes necessary at such times to throw water on the plasterofParis coating, so that it will regain its efficiency.

rl`he improved feature presented in this invention consists in the provision of a recess or container between the plaster-of- Paris coating and the mold-board proper, which container will hold a sutlicient-` supply of water to keep the coating constantly moistened during an entire days plowing or longer, tle moisture. gradually seeping through the plaster-of-Paris, and being replaced therein as rapidly as it is evaporated, or taken up by the earth.

Finally the object Aof the invention is to provide a device of the character described, that will be strong, durable, simple and etlicient, and comparatively easy to construct, and one that will not be likely to get out of working order.

lith these and various other objects in view, my invention has relation to certain novelfeatures of the construction and operation, an example of which is described in the following specification, and illustrated in the accompanying drawing, wherein:

Figure 1 is a side elevation of the herein described mold-board, occupying its proper working position with relation to the plowshare, the latter being shown in dotted line. Fig. 2 is a similar view of the mold-board in side elevation, with the plaster-of-Paris omitted, so that the wire netting is revealed which forms a partition between the plas Vter-of-Paris coating, and the recess at the` back of 'said coating. Fig. 3 is a -view of the mold-board in cross-section, thesection being taken upon the. line :i3-a2 of Fig. 1.

Referring now more particularly to the drawing, wherein like' letters of reference designate similar parts i-n all the figures, the letter A denotes a sheet of metal, preferably of steel, having the shape and formI of an ordinary mold-board,v but having all of its edges upturned at right angle to said sheet, as indicated 'at B. A piece of screen or netting C formed of heavy wire is secured to the face of the plate A by a number of bolts or rivets D. The outline of the netting C conforms to the face of the plate A, the

- edges of said netting being slightly spaced from the flange- B. The nettingis made slightly curved, so that its 'central portion is spaced slightly from the face of the plate A leaving a recess E, adapted to be tlledwith water. A pipe F passing through the plate A near the center thereof communicates with the recess E, and is vadapted to supply said recess with water. A drain-cock G may be made tocoinmunicate through the -plate A with the lower portion of the. recess E, so as to permit the water to be readilyl drained from said recess in order to prevent the plate A being rusted when the plow is not 1n use.

A The plaster-of-Paris facing is denoted by I the letterI-l.4 Before this facing israpplied to the plow, a sheet J of paper or some similar fabric should be laid u on the Wire netting C to prevent the plastic material from passing through the apertures ofthe' netting. The coating of plasterfof-Paris'should be 'ven a smooth surface that will come flus with theedges of the ange B, said all kinds of earth freely.- The Vwater will ooze through the plastic coating at a Very gradual rate, yet sufficiently fast to keep the surface of said Acoating damp enough to readily throw off the upturned earth. Since the wear upon a mold-board is Very slight, the above described device may be used for a long period of time before it will be necessary to replace the plaster-of-Paris coating.

It is apparent, however, that this may be done in a very short time, and at a low cost.-

It is possible that some other plastic material than plaster-of-Paris might be ernployed to form the mold-board facing H,

andit is also v`clear tliatthe recess at the back of the mold-board might Apossibly be dev signed in some other manner than that shown in the drawing. The invention' 1s therefore presented as including lall changes vhavin-g its edgesupturned upon the face, a

wire netting secured to said face, and having its central .portion spaced therefrom, and a coating of plastic material retained upon the face ofthe mold-board by lsaid screen and the upturned edges.

In testimony whereof I have 'signed my name to' this specification in the presence of two subscribing witnesses. v

. CHARLES K. MILLER. Witnesses:

G. W. COLEMAN, J. E. B A'roHLoR.

Copies 'of thisv patent may be `obtained for 've centseach, by addressing the Commissioner of Patents.

' Washington, D. C. `v

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