US759685A - Toothed bar for log-turners. - Google Patents

Description

No. 759,685. PATENTED MAY 10, 1904.

D. R. EDWARDS.

TOOTHED BAR FOR LOG TURNERS.

APPLICATION IILBD MAR. 20. 1903.

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PATENTED MAY 10, 1904.

D. R. EDWARDS. TOOTHED BAR FOR LOG TURNERS.

APPLICATION TILED MAR. 20. 1903.

2 SHEETS-SHEET 2.

NO MODEL.

WITNESSES UNITED STATES Patented May 10, 1904.

DANIEL R. EDWARDS, OF ORANGE, TEXAS.

TOO THED BAR FOR LOG-TURNERS.

SPECIFICATION forming part of Letters Patent No. 759,685, dated May 10, 1904. Application filed March 20, 1903. Serial No. 148,656. (No model.)

Toctll 11/71/0112 (it may concern:

- Be it known that I, DANIEL R. Enwnnns, a citizen of the United States, residing at Orange, county of Orange, State of Texas, have invented a certain new and useful Improvement in Toothed Bars for Log-Turners;

and I declare the following to be a full, clear,

and exact descriptionof the invention, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

My invention relates to metallic tooth-bars for log-turners; and it consists in the improved combination of elements in the construction of a built-up bar carrying teeth, as hereinafter described and claimed, and has for its object a construction of a bar of greatly superior strength to any of that type heretofore known, with a minimum amount of material and weight.

In the drawings, Figure 1 illustrates the general relation of my improved. bar to the other mechanism of a steam log-turner containing two fixed cylinders of the latest improved type. Fig. 2 illustrates a form of resistanceblock against which the teeth impinge when carrying the load. Fig. 3 is a perspective view of my improved tooth-bar, showing all the parts assembled. tical section with one of the side plates re moved. Figs. 5 and 6 are cross-sectional views upon lines 00 m, 3 y of Fig. 4. Fig. 7 is a perspective view of one of the side plates after being formed as hereinafter described.

Similar letters refer to similar parts.

In the drawings, A represents one fixed cylinder, 13 represents the other fixed cylinder, of a double-cylinder log-turner.

G is the log-turner when assembled and constructed for operation.

Dis the log-carriage, upon which the log E is represented, upon which the operation of rotating or turning is to be performed.

The log-turner O is pivoted to a cross-head and'piston-rod at a of the cylinder A and at c to a link F, which in turning is also pivoted at 0 to the cross-head and piston-rod of the cylinder B.

The tooth-bar proper is made up of webs Fig. 4: is a partial veror side plates, one of which is shown are,

there being no difference between these ex cept that they are rights and lefts. In Fig. 7 I have shown in perspective a view of the upper portion G of one of these webs or side plates, showing the peculiar formation. It is rolled, forged, or pressed, as may be deemed advisable, in the form shown at (1r--that is, it has a front flange g, raised from the body of the plate, and also a rear flange g, raised from the body of the plate, andinstead of having the flange g extend in a straight line throughout the whole extent of the tooth-bar there is at an offset of about two inches from such straight line, and the two flanges g g are brought together by curving the flange c at a point. in theform shown at thetop of Fig. 3. Upon the front of the tooth-bar a perforated plate H is shaped to conform to the edge of the web (:iand to lit the flange 0 upon each. web and is firmly attached to each side plate by riveting to the flanges thereof. This front plate H is perforated with rectangular perforations it /b, through which the teeth project and play, as hereinafter described. A similar rear plate to I-I-viz., J is lirmly riveted to the rear flanges of the side plates Gr up to the point of the angle in the flange 5 Instead of following the angle it is continued in a straight line to the top of the tooth-bar, as shown in the drawings. Between the flange g above the offset g" and this rear plate J is inserted a metal lilling-bar K, and the plate J is firmly attached continuously to the flange g above this offset 9 by rivets passing through the plate, the filling-bar K, and the flange g, as shown in Fig. 3. In thus assembling the device holes of suitable'size Z: 7:: are formed through these pieces K and adapt ed to receive the pivotal bolts 7:, upon which the teeth L L turn. This is shown in sectional Fig. 4. As these filling-pieces K are about two inches square, they afford a very solid and substantial support for the bolts k, which support the teeth, and also aid very materially in strengthening the upper portion of the bar, upon which the greatest number of diversely-acting strains produced by blows is brought in the operation of the bar. Between the two web-pieces (i G (shown in crosssection in Figs. 5 and 6) and immediately un derneath and engaging the front plate H are peculiarly-shaped blocks M M. (Shown separately in Fig. 2 and in combination in the construction in Fig. 4.) These blocks may be bolted in with through-bolts m on, passing through the Web-pieces G G, or they may be held by a multitude of rivets or any other convenient mode. The lower end of these blocks is chamfered off to conform to the position of the teeth L when the bar in descending raises the point of the teeth and causes them practically to recede to nearly the outer surface of the bar. This is shown clearly in Fig. 4. The upper end of the block M at its upper surface conforms to the general angular upper direction of the teeth necessary to give it a hold upon the log, and upon it the teeth rest when actually engaging the log, and it therefore receives a thrust of that engageinent. The upper portion of the block M is formed with a projection m as clearly seen in Fig. 2 and in section in Fig. 4. This projection rests upon the lower edge of the rec'- tangular hole It, so that the block is not only supported by the bolt m, but is also supported by an engagement of this projection of with the plate H. The lower end of the tooth-bar at each pivotal point is reinforced and made flush with the edge of the flanges g g by reinforcing-blocks n n and the pivotal bolts of the pivots c c, passing through the holes in the blocks n n. The upper tooth is preferably made wider at the point, as it does the larger part of the work and is subjected to greater strains. By this construction I am enabled to build a tooth-bar with the least metal, and yet have great strength. It consequently effects a saving of cost of construction, as well as cost of operation.

hat I claim is 1. In a tooth-bar for log-turners, the combination of right and left side pieces, each having flanges turned outwardly on their edges, each of said pieces having an offset or recess made on the back side of the tooth-bar, thereby narrowing the same through the toothed portion of the bar, filling-bars of metal inserted in the recesses whereby the outer sur-' face of said filling-bars are flush with the lower portion of the toothed bar, a perforated front plate attached to the outturned flanges of the side, a perforated back plate attached to the flanges of the bar at its lower portion and through the recessed flanges and said fllling-bars of metal at the upper or toothed portion of said tooth-bar, substantially as described.

2. In a tooth-bar for log-turners, the combination of right and left side pieces, each having flanges turned outwardly on their edges, each of said pieces having an offset or recess made on the back side of the tooth-bar thereby narrowing the sarne through the toothed portion of the bar, filling-bars of metal inserted in the recesses whereby the outer surface of said filling bars are flush with the lower portion of the toothed bar, a perforated front plate riveted to the outturned flanges of the side plates, a perforated back plate riveted to the flanges of the bar at its lower portion and through the recessed flanges and said filling-bars of metal at the upper or toothed portion of said tooth-bar, perforations through said filling-bars for the reception of pivotal bolts, teeth pivoted upon said pivotal bolts between said filling-bars with their points projecting through the perforations in the front of the bar, and filling-blocks between the two side pieces underneath each tooth securely fastened to said .bar forming abutments against which the teeth may rest when in operation, substantially as described.

3. In a tooth-bar for log-turners, the combination of two side pieces, rights and lefts, each outwardly flanged for the attachment of a front plate, a perforated front plate firmly riveted to said flanges, filling-pieces firmly attached between said side pieces and having projections or hooked portions extending through the perforations in said front plate and engaging the lower edge thereof, substantially as described.

In testimony whereof I sign this specification in the presence of two witnesses.

DANIEL R. EDWARDS.

Witnesses:

R. C. EDWARDS, N. BURTON.

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