US561643A - bibcock - Google Patents

Description

- 2 SheetsSl1eet 2. DE VAL OIS ST. JOHN. HARROW.

(No Model.)

H. 1). BABOOOK &

Patented June 9, 1896" UNITED STATES PATENT Fries.

HENRY D. BABCOOKQXND DE VALOIS ST. JOHN, OF LEONARDSYILLE, NElV YORK, ASSIGNORS TO THE STANDARD IIARROV (lOllilPANY, OF UTICA, NEW roan. p

HABROW.

SPECIFICATION forming part of LettersPatent No. 561,643, dated June 9, 1896.

' Application filed December 6,1894. Serial No. 531,070. (No model) T 02% whom) it may concern: inner face of the vertical web portion of each Be it known that we, HENRY D. BABCOCK part of the bar. In the notches are placed and DE VALOIS ST. JOHN, of Leonardsville, in spiked teeth 6, which are securely clamped the countyof Madison and State of NewYork, together and to the parts of the bar by bolts 5 have invented certain new and useful lm- 7. The cross-bars pass through openings 3 provements in Harroi s; and we do hereby dein the deep vertical webs of the draft-bars. clarc that the following is a full, clear, and There is also located in each openingon each exact description of the invention, which will. side of the cross-bar a bearing-piece S, haw enable others skilled in the art to which it aping a groove 8, adapted to receive the web of 6o pertains to make and use the same, reference the draft-bar. The pieces 8 are secured to' being had to the accompanying drawings, and the crossbar by being provided with a proto the letters and figures of reference marked jecting teat S on the flat back side, which enthereon, which form part of this specification. gages in a suitable hole or indentation of the Our invention relates to an improvement cross-bar. 65 in barrows. In setting up the harrow the parts of the In the drawings which accompany and form cross-bars are slipped through the openings a part of this specification, and in which simiin the draft-bars, and a piece 8 is slipped in lar letters and figures of reference refer to coron either side, as shown in Fig. i, when the responding parts in the several views, Figbars are spread or separated as far as the size 70 2o ure1showsaperspectiveviewofourimproved 0f the opening in the draft-bar will permit harrow. Fig. ishowsaplan view of aslightlyand the teeth are inserted between the parts modified form of construct-ion. Fig. 3 shows of the crossbar, holding them separated suffia portion of one of the crossbars in connecciently to maintain all the parts in their retion with a cross-section of one of the draftspective places. 75 bars. Fig. ishows aportion of the draft-bar On each of the several cross-bars are proand the cross-bar on a cross-section, together vided adjusting arms or levers 9 in the folwith the bearings of the cross-bar. Fig. 5 lowing manner: Immediately on the cross-bar shows a plan View of the parts shown in Fig. 3. is provided a sleeve 9, having a substantially Figs. 6, (3, G and 6 show details of a bearsquare opening to receive the bar and prevent 8c ing'piece used in the harrow. Fig. 7 shows the same being rotated therein. Means may a tooth-adjusting lever from the side, in conalso be provided for preventing the sleeve 9' nection with the cross-section of the cross from sliding laterally on the bar. The base bars. Fig. 8 shows an edge view of the same. end of the arm 0 is provided with a large open- Fig. 9 shows details relating to the teeth-ading, as shown at 9 for the reception of the S5 5 justing mechanism. Fig. 10 shows a perspecend of the sleeve 9, and is also provided with tive view of the adjusting-levershown in Figs. slotted openings in the nature of key-seats, 7 and S. Fig. 11 shows one of the parts of as shown (t W, which permit the eye to be the adjusting-lever mechanism disconnected placed on or removed from the end of the from the other parts. Fig. 12 shows a modisleeve when the key-seat groove 9 registers 0 tied form of construction of crossbars. with the projections fl on the end of: the

The harrow, as shown, consists of two secsleeve. tions A and I3, although the number of sec- For limiting the swin gin g movement of the tions maybe increased or diminished at pleasarm 9 on the sleeve 9 in one direction is proure. The sections are connected by links or vided, on the end of the sleeve, a pair of lugs 9 5 other suitable means to an evener -bar 2. or projections 9, against which the projec- Fach section of the harrow consists of drafttions 9 on the arm are adapted to engage. bars 3 and rocking cross-bars a. The cross- Coiled about the sleeve 5) is provideda spring bars are composed of two bars or parts 4 and 10, secured at one end to a pin 11 on one end 4., locked or lapped together, as shown. The of the sleeve 9 and at the other hooked onto mo horizontal flanges or webs of each bar are the arm 9, as shown at 12. This spring. is notched at 5 substantiallyup to the line of the tensioned to hold the lugs or projections 9 in contact with or against the projections 9 on the arm, and adapted to allow the tooth 6 to yield when it should strike an obstruction from the position shown in full lines in Fig. 9 to that shown in dotted lines in the same figure. The arm on the rear rocking crossbar is extended to form an operating leverhandle 13, and this lever-handle is connected with the several levers 9 on each of the rocking cross-bars byconnecting-rod 14. On the rear end of the connecting-rod is provided a semicircular rack 15,in which en gages a catch 16 on the lever-handle 13, securing the connecting-rod, together with the several parts, in any of its positions of adjustment.

-In the modified form of construction shown in Fig. 12 crescent-shaped bars w and so are substituted for the angle-iron bars shown in the previous figures, and the edges of the crescent shapes are notched to partially receive the tooth, as shown. In this construction the elasticity or spring of the frame-bar on its cross-section line is taken advantage of in clamping the teeth.

The operation of this class of spike-tooth harrow is too well understood to warrant extended description. It is sufficient to note that by the provision of the spring 1.0 on each of the rocking cross-bars, with the set of teeth located on each, they are independently 1novable, whereby they can free themselves when caughton such obstructions as would otherwise injure the harrow in case the tooth failed to become released, and the independent operation of the bars obviates any jumping or springing of the harrow, which would take place where all the teeth of each section moved together, as well as reducing the amount of power required to free the harrow from a fixed obstruction. All the remaining teeth of the harrow except those located on the bar of the tooth, which may become caught, remain at work, as usual, in any of their positions of adjustment within the range of the adjusting mechanism provided.

What we claim as new, and desire to secure by Letters Patent, is-= The combination in a harrow of a rocking tooth-bar, a sleeve mounted on the bar, an adjusting-arm pivoted on the sleeve, a stop for limiting the swinging movement of the arm in one direction, and a spring coiled around the sleeve and attached to the sleeve at one end and to the arm at the other for yieldingly holding the bar, substantially as set forth.

In witness whereof we have affixed our signatures in presence of two witnesses.

HENRY D. BABOOCK. DE VALOIS ST. JOHN.

\Vitn esses:

E. WILLARD J ONES, GEORGE O. CARTER.

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