US338176A

US338176A - la dow

Info

Publication number: US338176A
Authority: US
Publication date: 1886-03-16
Anticipated expiration: 1903-03-16

Description

(No Model.) 3 Shets-Sheet 1. G. LA DOW. SPRING TOOT'H HARROW.

Patented Mar; 16, 1 886.

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N. PETERS PIwlo-liilwgxipher. Washingion. \1 c,

(No Model.) 3 sheets- -sheet 2.

0. LA now. SPRING TOOTH HARROW. 110,338,176. Patented Mar. 16, .1886.

N. PETEHS. Pholo-Lnhognphczz Wimhinglon. me.

3 Sheets-Sheet 3.

0. LA DOW.

SPRING TOOTH HARROW.

(No Model.)

Patented Mar. 16, 1886.

UNITED STATES PATENT OFFICE.

CHARLES LA DOW, OF ALBANY, NEW YORK.

SPRING-TOOTH HARROW.

SPECIFICATION forming part of Letters Patent No. 338,176, dated March 16, 1886.

Application filed February 1, 1886. Serial No. 190,463. (No modclfi .To all whom it may concern;

Be it known that I, CHARLES LA DOW, a citizen of the United States, residing in the city and county of Albany, and State of New York, have invented certain new and useful Improvements in Spring-Tooth Harrows, of which the following is a specification.

My invention relates to spring-tooth harrows; and the objects of the invention are to so construct spring-tooth harrows that they shall be lighter, more elastic, more serviceable, and more convenient than those heretofore made.

Myinvention consists in combining springteeth with an elastic or spring frame in such manner that the frame shall yield considerably when the teeth are severely strained, and shall vibrate continually in concert with the vibration of the spring-teeth.

My invention further consists in attaching alight draft-pole loosely to a low harrow-frame in such manner that the harrow cannot jump forward toward the team, and the team can swerve or turn around just as free as if they were attached to the harrow by whiftletrees and traces only, drawing the harrow around a curve as if no pole were attached.

My invention further consists in laying metal frame-bars across each other, which bars are not capable of embedding themselves into each other, and holding them in their relative desired position by clamps, which cause sufficient frictional contact between said bars to hold them in place.

My invention further consists in mounting a jointed-frame harrow on wheels which take into the ground and prevent the teeth from trailing or swerving into each others tracks, and which also serve for gaging the depth of penetration of the teeth, and in connecting said wheels to mechanism which acts upon all the series of wheels simultaneously to vary their position relatively to the frame, the wheels being distributed about the sections of the jointed frame, and the wheel-connections being arranged to permit the sections to work up and down on their hinged connections.

My invention further consists in making a spring-tooth adjustable on a spring or elastic frame.

My invention also consists in other details of construction afterward described and claimed.

In the drawings, Figure 1 represents a top plan view of my invention, showing series of wheels arranged to balance the jointed sec tions of the frame. Fig. 2 represents a side view of my invention, showing the teeth in full lines elevated above the ground andin dotted lines arranged to penetrate the soil. Fig. 3 represents a section of the elastic frame and a top view of the method of clamping the frame-bars together, also showing a top view of one tooth attached to the frame-bars. Fig. 4 represents a side sectional view of the framebars, the casting which clamps them together,

and a portion of a tooth resting in a groove formed on the under side of said casting; also, the clip below the tooth and the clip above the frame-bars, and one of the bolts used for clamping all of said parts together. Fig. 5 represents a rear end view of Fig. 4. Fig. 6 represents an edge view of one of the supporting-wheels and the method of mounting the wheel on its hub within the jaws of its leverframe. Fig. 7 represents a top view of the casting in which the frame-bars rest at their point of contact with each other. Fig. 8 represents a sectional enlarged view of the sectional hub adapted to be screwed together and grasp one of the supportingwheels, also showing the core or spindle on which said hub revolves. Fig. 9 represents by full lines a side view of a section of the frame and one tooth attached thereto, and by dotted lines the deflection or spring of the elastic frame in concert with the spring of the tooth when passing an obstruction. Fig. 10 represents a side view of the inner pair of wheels arranged in line with the joints which hinge the section together, the link which unites the front and back wheels together, and the ratchet-and-lever mechanism for holding the wheels at the desired elevation relative to the frame-bars. Fig. 11 represents a rear view of the lever and its ratchet; also showing sections of the rods which connect the inner wheels to those near the outer sides of the harrow. Fig. 12 represents a sectional enlarged top view of said connecting-rods, the lever-pin which turns with the lever, and which rocks said rods in their bearings; also a section of the link which connects the inner wheels together. Fig. 13 represents a top View of a harrow-frame consisting of round rods with the teeth clamped thereto, as heretofore described, and having the frame balanced on wheels which are adjustable independently of each other, said adjustment being regulated by friction-clamps gripping the wheel-jaws to the side of the harrow-frame. Fig. 1 L represents a side View of a harrowframe composed of round rods, having the series of wheels each independenty adjustable. Fig. 15 represents an enlarged sectional top view of my improved method of clamping the round bars of the harrow-frame together. 7

In the drawings, A A represent the framebars of the harrow, which cross each other, and are held in place relatively to each other by the friction plate or casting F. The framebars rest in the grooves a a in the casting F,

: and are clamped and held there in the proper relation to each other by means of the clips f f, and the clamping-bolts H H, which unite the tooth B. frame-bars, casting F, and clips together. The teeth B may be removed and the bolts drawn to unite the castings and framebar and clips together for transportation, the teeth being removed so that the barrows will pack more closely.

The sections of the barrow-frame are hinged together by joints 0 0, which permit the sections to move up and down independently of each other at their outer sides, their inner sides moving in concert.

6 represents a bearing-beam for supporting the pivoted jaws E E, in which the wheels 0 are mounted.

G G represent a sectional hub, which is adapted to tightly clamp the wheel 0 and revolve therewith on the core or spindle S. The

: bolt 9 passes through the jaws E E and clamps said jaws firmly against the end of the core 9, to prevent its rotation. The hub G G is somewhat shorter than its spindle, and can revolve freely thereon.

The wheels 0 O C O are distributed throughout the frame,and occupy such position as shall balance the joint-ed sections and enable them to maintain all parts of the frame at a uniform distance from the ground. The wheels 0 have sharp edges, and are adapted to cut into the ground and prevent side motion or swerving of the harrow, incident to other machines of this class,when running lengthwise of furrows of hard ground. These wheels also serve to raise and lower the frame-bars and their attached teeth. The series of wheels are united by the rods I I and the link K, all of which are coupled to the lever G in such manner that the rocking of said lever back-ward or forward raises or lowers said wheels and holds them in any desired position up or down relatively to the harrow-frame. The rods I I are preferably square, and are adapted, when rocked, to turn thejaws E E with them in either direction. The lever G is mounted on a pin, 01, which is preferably square in cross-section,

and therods I I are hinged to said pin and conform to the hinge motion of the sections of the harrow-frame. The ratchet M is mounted firmly on the bar K, and operates in connection with the dog on the lever in a well-known way.

The evener-bar D is attached to the harrowframe by links (I d in the usual flexible manner. The pole D is pivoted to the evener-loar, so as to swing freely thereon when the machine is being turned around, enabling a team to draw the harrow around acurve as readily as if no pole were attached, while the pole serves to prevent backward and forward jumping of the frame when the harrow-teeth are passing over hard ground or obstructions.

The barrow-teeth B are preferably made of spring-steel and curved in a well known way, and they are each adapted to beindependently adjusted, so as to regulate their pitch, which. may be done by loosening the bolts H H and sliding the tooth endwise and retightening the said bolts. If the'casting F were omitted,the tooth could be clamped directly to the framebars.

The frame-bars of the harrow are preferably made of thin metal adapted to spring or yield, as shown in dotted lines in Fig. 9, when the teeth are strained severely in passing obstructions. These frame-bars will also vibrate in concert with the vibration of the springteeth when doing their usual work, and thus render the operation of the teeth more effect ive and increase their durability, as with this frame it isimpossible under any circumstances to break the teeth of the harrow.

Other 'frame-barssuch as'shown in Figs. 13, 14, and 15may be used, if desired, with my improved method of raising and lowering the teeth; but such frame is not elastic, and I prefer the construction heretofore described.

Said Figs. 13, 14, and 15, show how the wheels 0 C may be adjusted independently of each other. The bars I I may be placed in any desired position on the harrow-frame, and wheels 0 G maybe adjusted either as a series or indepedently, rigid teeth may be substituted and attached to the elastic frame in any manner desired and the pole may be rigidly attached to the evener-bar, the rods d d allowing the pole to swerve sidewise rela-- tively to the harrow, and the other features of my invention may be used separately or together, according to the inclination of the manufacturer or the nature of the work to be done, and remain within the limits of my in- Vention, which comprehends any organization of parts which shall enable a pole to be coupled to a spring-tooth harrowframe (whether elastic or rigid) so that the pole shall have side motion independent of the harrow.

My inventionalso comprehends any organization of wheels, runners, or other instrumentalities which shall balance the sections of a jointed barrow-frame, and shall also prevent the trailing of the teeth in each others tracks.

My invention also contemplates, broadly, an elastic frame for barrow-teeth, composed of metal, adapted to spring in concert with any strain upon the teeth when combined with either rigid or spring teeth.

The frame-bars of this harrow are not adapted to be embedded into each other, whether round, square, or flat bars be used, but are held in their proper position by friction only. Heavy flat bars of metal may be used in the frame and not adapted to spring; but I prefer the elastic frame as being lighter and more efficient.

Having thus described my invention, what I claim is-- 1. A htllOWfl2LI1l6 composed of the springhars A A, crossing each other, and spring-teeth mounted on the bars at their junction with each other, in combination with means adapted to clamp the teeth and bars together.

2. A sectional barrow-frame consisting of the elastic bars A A, crossing each other, springteeth mounted on the bars at their point ofjunction with each other, and hinges between the sections.

3. A barrow-frame composed of the elastic bars A A, crossing each other diagonally, spring-teeth mounted on the bars and supported solely from the points where the bars cross each other, and means adapted to unite the bars and teeth at their point ofjunction.

4. A barrow-frame composed of bars crossing each other, teeth mounted on the bars, so as to be supported from the points where the bars cross each other, and clamp-bolts arranged in two opposite angles formed by the crossing bars, which hold the bars relatively to each other without being perforated or embedded into each other.

5. A jointed barrow-frame and spring-teeth, in combination with wheels adapted to balance the sections, and also to out into the ground, so as to prevent swerving of the harrow-frame.

6. The combination of a barrow-frame, spring-teeth thereon adapted to hook into the earth as they are drawn forward, and a pole pivoted thereto, so as to swing laterally, substantially as described.

7. In a harrow, the combination of the bars A A, spring-teeth B, supportingwheels G G G, the cranked rods I I, the lever J, and the link K.

8. A barrow-frame composed of fiat metal bars A A, teeth mounted on the bars at the points where they cross each other, in combination with clamp-bolts formed independently of the teeth, which prevent the bars from having end motion relatively to each other and. permit adjustment of the pitch of the teeth.

9. In a harrow, a sectional frame adapted to conform to inequalities of surface, springteet-h vibrating on the sections, and wheels or other supporting devices having contact with the ground at three or more points beneath the frame, so as to balance the sections, in combination with mechanism whereby the sections can be simultaneously raised or lowered on their supporting devices.

CHARLES LA DOlV.

Witnesses:

B. I. STANTON, Fnnno. HARRIS.