US23921A - Improvement in harvesting-machines - Google Patents

Description

M. G. HUBBARD. Harvester Cutter.

Patented Maw 10, 1859.

INVENT PATENT OFFI E.

M. G. HUBBARD, OF PENN YAN, NEW YORK.

IMPROVEMENT IN HARVESTING-MACHINES.

Specification forming part of Letters Patent No. 23,921, dated May 10, 1859.

- To all whom it may concern:

Be it known that I, M. G. HUBBARD, of Penn Yan, Yates county, New York, have invented certain new and useful Improvements 1n Mowing-Machines; and I do hereby declare securing the pitman-connection, atop view of and ascertain the same as follows, reference being had to the accompanying drawings, illustrative thereof.

The improvements herein described consist in a new arrangement and construction of some of the parts of the cutting apparatus of my wellknown two wheeled mowing machine,

- and are calculated to adapt it to the many different varieties of grasses and surfaces of land, and the various obstacles which different sections of the country present to such a machine, and to add to the safety and convenience of its pitman connection. Other machines now in use are well adapted to some particular localities, but none of them have the requisite qualities to encounter successfully all of the obstacles which they must meet -in an extensive agricultural country. Most of the machines in common use will work tolerably well in thin timothy grass upon an unobstructed surface but these machines in order to meet the general wants of the farming community must also operate perfectly in heavy fine grass, tall light grass, heavy tangled clover, .lodged wild grass, prairie grass, and

all their intermediates, and they must clear themselves of cut grass; and their construction must be upon such principles that they may encounter successfully such obstacles as wet fog, old manure, soft knobs of wet'clay projecting up from the surface, 850.; but espe-' cially on Western farms they will meet a se rious obstacle, called gopher hills, which require peculiar features in the cutting apparafeatures herein described seem to complete this part of my machine and qualify it for all emergencies.

Figure 1 in the drawings hereto attached is a top view of a portion of my improved cutting apparatus. Fig. 2 is a perspective view thereof. Fig. 3 is a view of the outer dividing finger or shoe detached. Fig. 4 is a view of one of the intermediate fingers detached.

Fig. 5 is a back view of the safety-flangefor which is seen at the inner end of Fig. l,where 8 represents a flange projecting up close to and back of the joint which connects the pitman to the cutter-bar. This joint is made in the usual manner, and the pin which passes through to form the connection has an oval head. The flange s is so placed that the said pin may be introduced at one end of it, or a notch may be cut out of its center, as seen at m, which is probably the best form, because at the center of the stroke there would be no tendency of this pin to work out, because the crank would be either pushing or drawing upon it. With this safety-flange no other security is needed to prevent the pin from working out while the machine is at work, and thus the safest and most convenient attachment is formed of the pitman to the cutter-bar.

Fig. 6 is an end View, showing the top and bottom lines of my new finger and the position of the finger-bar with respect thereto, and the manner of attaching the finger to the fingerbar. The most difficult task which I have found in this part of my machine was to attain such definite outlines for these intermediate fingers as to overcome several of the obstacles previously alluded to, as all the different styles of fingers which I had previously seen would eithercarry old wet fine grass (which is often left on the ground, usually called wet fog) on their points, and thereby force the standing grass down in front of them; or else, if sufficiently straight on the top to avoid this difficulty, they would be so abruptly inclined upon their lower edge as to create a fatal tendency to ride up over. lodged grass; or their side lines would present such abrupt angles or. curves as to prevent the perfectly free entrance of the grass to the cutters; or they would be so narrow at their base (at the heel of the cutters) as to lack the strength required to resist the rapid and powerful stroke of the cutters. A guard-finger should be large and strong at its base and considerably lon ger than theyhave been made heretofore, and I have discovered that itsoutlines should approximate as nearly as convenient to straight lines meeting ona point nearly in front of and on a line with the points of the cutters. Where an independent yielding finger-bar is used, as on my twowheeletl mower, the lower edges of the fingers should rise with as little abrnptness as possible, in order to prevent riding up over lodged grass, and the above ascertained definite outlines of a finger enable me to accomplish the several objects and overcome the several obstacles named. It will also be observed that the abruptness in the rise of the lower edge of the finger may be very much diminished by the inclined position of the finger-bar, as =seen at a in Fig. 6, because with this position of the bar the lower line of the finger may commence at the extreme rear end of the shank at m, and rise in nearly a straight line to the point'at it; but in thus elevating the front edge of the fin-C ger-bar, I encountered considerabledifficulty in attaching the fingers with the bolts and: nuts, as I had formerly done, as I had passed- I the bolts up through the fingers andbar and secured them by nuts on the top of the bar near its front edge, and when Ielevated the front edge of the bar it brought the'nuts too prominent as obstacles to the cut grass sliding ofi from the bar. To overcome this difficulty, 1 cut a thread in the hole in thefinger and invert the bolt, passing it down through the bar and screwing it into the finger, which brings the head on top of the bar, and. this head can be madeso thin as to present no serious obstacle to the cut grass. I screwthis bolt in by its head, which is square, and I thus'use the finger for the nut, as seen at o in Fig. 6. I was formerly compelled to use a small bolt for this purpose, because a large nut on the top of the bar was objectionable; but with this new arrangement I can use large strong bolts,

'as the fingers form ample nuts for bolts of any required. size.

The outer shoe or'dividing-finger has the same duty to perform as the intermediate fingers in supporting the grass to be cut, and, like the inner shoe, it has still another important duty in so protecting the end cutter at the extremity of the cutter-bar as to permit it to stop and change its motion at every revolution of the crank without dragging in the loose or standing grass. These being the only essential duties which the outer as well as the inner' shoe has to perform in the process of cutting, and as the duties of the outer shoe relate wholly to the process of cutting, I have aimed to divest it of every objectionable quality not absolutely necessary for that purpose, and at application and arrangements had other and distinct relative elements, I obtained Letters Patent for it as a distinct device on the 9th of February,1858; but this new outershoe havin gen intimate connection with my improved finger and finger-bar herein described, I would prefer to illustrate and describe them in their connected and relative positions as auxiliary elements of my perfected cutting apparatus. To attain the two objects specified as necessary in the outer shoe-viz., to support the grass for the outer cutter to out against and divide" the grass for the outer cutter to change its motion-I construct the main body of it very similar in its proportions to the intermediate fingers (except somewhat larger) and locate it similarly; but on its top edge I form a wide flat dividing-cap, H, nearly the width of one of the cutters, and extend this cap by a gradual taper to the extreme front end of themain body'of the shoe, so it will divide the grass at a point considerably higher than the ground, and thereby bend itoverto one side without crushing it down; but in order to attain a perfect action of the outer cutter in cutting against this shoe it is necessary to locate this dividing-cap H so that it will only come flush with the inner side of the main body of the' shoe and project wholly on the outside. This method of construction enables me to attain the specified objects and also to castthis -shoe in one light piece, which, from its peculiar shape, possessesgreat strength, both laterally and vertically, with extreme lightness, and enables it t to pierce and sever many obstacles which theordinary form of shoe would carry on its point,-and break down the grass in front of it. -It will be observed that this form of the shoe might leave the rearshoulder, I, so abrupt as to suddenly force down the edge of the standing grass; but to prevent this result a I place the finger-bar so that its front edge inclines up nearly the thickness of the bar, as previously described, and consequently the "said shoulder I is rendered so slight andgradual as to allow the standingagrass to slip by it withoutdragging itdown. This position of the bar also diminishes the rear shoulders of the fingers to such a degree as to entirely prevent the accumulation of wet clay or soft soil under the cutters in cutting through the gopher-hills, previously alluded to, and enables :me to attain such qualities in my cutting apparatus that it will-clear itself of fine-cutgrass on its top surface as well as the obstacles named on its under surface, and the definite outlines of the fingers, as described, are such that they will neither carry wet fog upon their points nor incline the cutting apparatus to run up over lodged clover nor carry cutgrass before it. I also find that by placing the finger-bar in the inclined. position described its vertical stiffness is very much increased,-which is an important consideration in my machine,

because I often carry it suspended at its inner end and projecting outits whole length. Therefore its vertical stiffness is of great importance.

Having. thus fully described my improvements in mowing-machines,what Iclaim there- 2. The safety-flange s, for securing the pit-' in, and desire to secure by Letters Patent as man-connecti0n,when constructed and located my invention, issubstantially as set forth.

1. The conformation of the intermediate fingers of a reaping and. mowing machine having M. G. HUBBARD. a conical form with a straight outline from point to heel, as herein set forth, so as to pre- Witnesses: sent a straight gradual tape-r on the under 0. WATT,

side, as well as above, the whole being con- L. LEWIS.

structed and arranged as herein specified.

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