US271787A - Harvester cutter-bar - Google Patents

Description

mmm J, K. CASE.

HARVESTER GUTTER BR. i No. 271,787. Patented Pel 6, 1833'.

WITNESSES ATTQRNEYS UNITED STATES PATENT 'EEICE JOHN K. casa, oFviNoENNEs, INDIANA.

HARVESTER CUTTER-BAR.

SPECIFICATION forming part bf Letters Patent No. 271,787, dated February 6,.1883.

pplication filed February 2l, 1882. (No model.)

i To all whom it may concern:

` Beit known that I,JoHN K.GASE, acitizen of the United States, and a resident ot' Vincennes, in the count-y of Knox and State ot' Indiana, have invented a new andvaluable Improvement in Harvester Cutter-Bars; and l do hereby declare that the following is a full, clear, and exact description lof the construction and operation of the same, reference being had to the annexed drawings, making a part ot' this `specitication, andto the letters and 'igures of reference marked thereon. i

Figure l of the drawings is a representation of apl'an view ofmyimproved cutter-bar. Fig.

`2' is a cross-sectional view of the same. Fig.3is

a vertical longitudinal sectional view. Fig. 4 is a plan view of the sickle-bar with the teeth removed, and Fig. 5 is a plan viewot one ot' the knives.

rl'his invention has relation to harvester cutter-bars; and it consists in the construction and novel arrangemeht ot' parts, as will be hereinafter fully described, and particularly7 pointed out in the claim.

`Iln the accompanying drawings, the letter A designates a sickle-bar, which is `recessed lengthwise on the bottom to receive the slidebar B; or the Vsickle-bar may beprovided with edge-bearings for the slide. On top the sicklebar is formed with the dovetail recesses c, to receive thejbroad dovetail Shanks or roots d of the teeth E, the edges h'of which are beveled to engage the overhanging or undercut ixed bearing g at oneend ot' each recess, and the undercut movable bearing e at the other end thereof. VThis movablebearing e is a key projection, which extendsY from the slide-bar B` -dercut engaging edge m of the key projection eis oblique, and it is designed to correspond in angular direction with the edge of the root d,

.which it engages, so that when forcibly pressed against said edge it will draw the tooth backward rmly into its seat, lixing it in positionV so that itcannot shake. In order to give the key-bar end wise motion to bring its key projections into forcible engagement with thebevat one end of the slide-bar, is employed, said set-screw passing through a threaded bearing, t, in the end ot' the sickle-bar. On this setscrew a jam-nut, n, is located, serving to securethe' screw in position when turned up.

The other end ofthe sickle-bar is providedV with a threaded stud, s', passing through au. opening, t', inthe end of the sickle-bar, and provided with a. nut,n, whereby the bar may be secured at this end. When the screw-fastenings are disengaged snfliciently the key-bar can be `moved backward, releasing the teeth from the key projections, so that anypr all of 'the teeth can be detached: so, also, `the slidebar can be removed from` the sickle-bar, it being held in connection therewith by thescrewfastenings at its ends and by the engagement of its key projections with the teeth on top. ot the sickle-bar.

A cutter-bar supplied with a central longitudinal groove in its face immediately beneaththe cutter-blades has been provided with transverse undercut dovetailed'receptacles above the groovefor receiving the notched straight bevelededgesoftheshanksofthecutter-blades, and combined with a lock-bolt supplied with alternate rises and depressions, and proyided with a ilexible end having a lock-pin, which is adapted to be spruuginto a holein the face ot' the cutter-bar near its outer end when the lockbolt has been pressed or driven to place in` its groove and the rises have entered the notches in the 'shanks ofthe cutter-blades. A sicklebar, from which rises a number otinclinedlugs,

all of which incline in the same direction-z'. e., toward the outer end oi' said bar-and are ot' a suliicient length to pass through notches'made in the straight beveled edges ot' the sickleblades, and also through slots iu a locking-bar which covers j the rear portions of the blades, has been combined with a screw passed through the upturned end ofthe sickle-bar into the end ot' the locking-bar, said screw being tapped and eled edges of the tooth-Shanks, a set-screw, s, n

designed to forcibly draw-down the lockingbar upon the sickleblades, other screws being passed dowuverticallythrough the locking-bar, through two or more of the shauks of Ico the sickle-blades, which are perforated `for this purpose, and into the sickle-bar. In this case, however, the straight edges of the blades overlap each other, so that the edge of one blade presses upon and locksidown the edge of the adjacent blade, and all of'the vertical screws must he loosened in order to remove a single blade. A cutter having a tapering tang, the taper being toward the rear, has been fitted into a transverse receptacle of the cu tter-bareither in the top or bottom face-and held in place by a screw passed through its shank into the cutter-bar prior to my invention; and I claim noneof these constructions, broadly, herein.

What I claim as my invention, and desire to secure by Letters Patent, is-

The combination, to form a sickle for mowers and harvesters, ot' a frame-har having a longitudinal bearing in its bottom, and dove-` tailed recesses having undercut bevels at one hereunto subscribed my naine in the presence of two witnesses.

JOHN'K. CASE.

Witnesses:

GEO. G. RAMSDELL, DEXTER GARDNER.

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