US778366A - Sawmill machinery. - Google Patents

Description

PATENTED DBG. 27, 1904.

`D.A.KE1\INB DZ. SAWMILL MMWIINEM.y

APPLICATION FILED JUNE 4, 1904.

SSHEETS-SHEET 1,

PATENTED DEC. 27, 1904.

D. A. KENNEDY. SAWMILL MACHINERY. APPLICATION FILED JUNE 4, 1904.

3 SHEETS-SHEET 2.

PATENTEE'EEG. 27, 1904.

D. A. KENNEDY.

SAWMILL MACHINERY.

APPLIOATION FILED JUNE 4, 1904.

3 SHEETS-SHEET 3.

y M.. I

Patented December 27, 1904.

UNITED STATES V,PATENT OFFICE.

DONALD A. KENNEDY, OF ASHLAND, WISCONSIN.

SAWMILL MACHINERY.

SPECIFICATION forming part of Letters Patent No. 778,366, dated December 27, 1904. Application fllefl J' une 4, 1904. Serial No. 211,107.

To all whom zit may con/cern.' v

Beit known that I, DONALD A. KENNEDY, a citizen of the United States. and a resident of Ashland, in the county of Ashland and State of Wisconsin, have invented certain new and useful Improvements in Sawmill Machinery;

and I do hereby declare that the following is a full, clear, and exact description thereof. My invention has for one of its objects to provide for stopping, straightening, and releasing one at a time the pieces of llumber fed on transfer-conveyers to a resaw-feeder or elsewhere in a sawmill. v

Another object of the invention is to control the feed of logs from an inclined log-deck to a carriage; and a further object of said invention is to protect the link belts vor chains of transferconveyers,as well as rolls and other mechanism of log-decks.

vThese objects I attain by the construction and arrangement of parts hereinafter particularly set forth with reference to the accompanying drawings, and subsequently claimed.

Figure l of the drawings representsa front elevation of a resaw-feeder similar tothe one set forth in my Patent No. 747,979, of December 29, 1903, fragments of transfer-conveyers that discharge onto the resaw-feeder from'y opposite sides of-the same, and mechanism lin accordance with my invention for stopping, straightening, and releasing pieces of lumber fed on the conveyers, a floor and gearing in this view being in section; Fig. 2, a plan view of what is shown in the view aforesaid, and Fig. 3 a sectional view'illustrating an application of my invention to the incline of a logdeck in proximity to a carriage.

Referring 1by letter to Figs. 1 and 2 of the drawings, A indicates each of the transferconveyers arranged as above stated. Lengthwise of the link belts of the conveyers, preferably outside the same and Hush with or below the upper faces of said belts, are skids B, the lower ends of these skids being provided with lateral pivots b for connection with any suitable supports. The forwardend of each skid is pivotally connected to the upper end of a vertically-disposed pitman C, and the lower end of this pitman is likewise connected to an arm of a bell-crank lever D, fast ona rock-shaft E, for which bearings F are provided on the floor under the resaw-feeder. The other arm of each bell-crank lever is pivotally connected to the lower end of a vertically-disposed stop-bar G, and a link H connects each stop-bar with the adjacent pitman, this connection being at a suitable distance below the adjacent skid. Arms of the levers D are shown as having extensions I in the form of handles. A link J is shown employed in connection with one of the pitmen and bellcrank levers in each set of same, and as a result of this connection the skid and stop-bar mechanism duplicated on opposite sides of the resaw-feeder may be operated by a movement Vof either of the handles I, although it is practical to omit one of said handles. It is also practical, but not as convenient, to do away with the link J and operate each skid and stopbar mechanism independent of the other. It also follows thata single transferconveyer may be'employed to carry lumber to the resaw-feeder or elsewhere in a sawmill, in which case only one of the skid and stop-bar mechanisms will be utilized.

In practice a pair of stop-bars Gr are-lifted by a throw of a corresponding pair of connected bell-crank levers D in the proper direcn tion, and the upper ends of said bars are thus brought in the pathof a piece of lumber carried upward by the adjacent transfer-conveyer, the skids A in union with thepitmen C, linked to the aforesaid bars, being then in normal position. The stopped lumber automatically straightens itself if skewed on the conveyer, and when the stop-bars are swung down to clear said lumber the pitmen linked to said arms operate to lift the corresponding skids at an angle'to said conveyer, the result being that the forward piece of the lumber is pushed on over said skids by the pressure of the lumber accumulating in the rear. The

forward piece of lumber then comes againv u'pon the conveyer and is finally discharged onto the resaw-feeder or other support. By proper manipulation of the skid and stop-bar mechanism the lumber is mechanically alined. with the resaw-feeder or other support and fed theretol piece by piece, the elevation of the skids relieving the link belts of the conveyer from friction on the stopped lumber.

Then the skid and stop-bar mechanism is duplicated, to be operated in conjunction with two opposite transfer-conveyers and the coupling-link J is employed, one set of skids are lifted when the other set are lowered, and the same is true of the stop-bars.

ln Fig. 3, A indicates the incline of a logdeck and B one of a plurality of skids pivotally adjustable between the sides of said incline. The pivot connection of the skid with the log-deck incline is a rod engaging the lower ends of both, and for a certain distance from the saw-line said skid is by preference normally parallel to a head-block, its remainder beingl then approximately parallel to said incline slightly below the surfaces on which the logs descend. In normal position the lower portion of each skid B of the `preferred form extends above the log-deck, and its upper end is pivotally connected to an extremity of a vertically-disposed pitman C, likewise connected to an arm of a lever D, fast on a rock-shaft E, another arm of this lever being in pivotal connection with the lower end of a vertically-disposed stop-bar Gr, connected by a link H with the pitman aforesaid. An extension I of one of the several levers D is coupled to a pitman K, and this pitman is operated by steam or other suitable power. Logs rolling` down the incline of the deck aforesaid are successively stopped by the bars G in their path and properly alined against said bars. The skids B', of which there may be any suitable number, extend under a log stopped against the bars G, and if the pitmen C be lifted said skids will be swung upward and said bars retracted out of the path of the log. As a result of upward swing on the part of the skids and clearance of the stop-bars the log is discharged onto the adjacent carriage. Lifting of the skids prevents the log from rolling on other mechanism (not shown) in the log-deck, and when lifted the upper ends of the skids and the pitmen C come in the path of another descending log to prevent the same from rolling far-ther down the incline of the deck until said skids and the stop-bars G are restored to normal position.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination with a transfer-conveyer, pivotal skids lengthwise of the convey'er-belts and flush with or below the upper faces of same, suitably connected and mounted bell-crank levers having arms thereof coupled, by pitmen, with the skids forward of their pivots; stop-bars connected to the other arms of said levers to be lifted forward of said skids in the path of material on the conveyor, and a link connecting each stop-bar with a pitman. g

2. The combination of opposite transferconveyers, pivotal skids lengthwise of the conveyer-belts and fiush with or below the upper faces of same, suitably connected and mounted bell-crank levers each havingan arm thereof coupled, by a pitman, with a skid forward of its pivot; a stop-bar connected to the other arm of each of said levers to be lifted forward of a skid in the path of material on a conveyer, a link connecting each stop-bar with a pitman, and another link in connection with one of the pitmen and bell-crank levers in each set of same.

3. The combination of a logorlumber way, pivotally-adjustable skids lengthwise of said way, a rock-shaft having lever-aml-pitman connection with the skids beyond the pivots of same, stop-bars arranged in lever connection with the shaft to have their play `forward of the skid-pitmen, and means for actuating said shaft.

4. The combination with opposite transferconveyers, of means for stopping, straightening and releasing pieces of lumber fed successively ou each conveyor, the release from one conveyer alternating with a stop of material fed on the other.

5. The combination of a loger lumber way` pivotal skids lengthwise of said way. reciprocal vertically-movable stop-bars, and means for simultaneous adjustment of said skids and stopbars.

rl`he combination with a log or lumber way, pivotally-zuljustable skids lengthwisel of said way, a rock-shaft having lever-aml-pitman connection with the ends of the skids farthest from the pivot of same, stop-bars in lever connection with the shaft, a link connecting each stop-bar with a skid-pitman, and means for actuating said shaft.

In testimony that l claim the foregoing l have hereunto set my hand, at Ashland, in the county of Ashland and State of \Visconsin, in the presence of two witnesses.

DONALD A. KENNEDY.

litnessesr M. KENNEDY, J. J. McDoNALn.

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