US420849A - Compensating gang sawing-machine - Google Patents

Description

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A. J. WILGOX.

OOMPENSATING GANG SAWING MAGHINE.

No. 420,849. Patented Feb. 4, 1890.

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UNITED STATES PATENT O IC ALFRED J. WVILOOX, OF MUSKEGON, MICHIGAN.

COMPENSATING GANG SAWlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 420,849, dated February 4, 1890.

Application filed April 9, 1889. Serial No. 306,501. (No model.)

To to whom it may concern:

Be it known that I, ALFRED J. WILCOX, a citizen of the United States, residing at Muskegon, in the county of Muskegon and State of Michigan, have invented certain new and useful Improvements in Compensating Gang Sawing-Machines; and I do hereby declare the following tobe a full, clear, and exact descrip-v tion of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My present invention relates to an improvement in sawing'machinery for the manufacture of lumber, the object of the invention beingto so construct the mechanism thereof that it may have a compensating move-- ment; and it consists, essentially, of any ordinary and common gang .of reciprocating saws with the usual actuating mechanism therefor and suitable counter-balances, so that the motion may be made steady and uniform and for other reasons, substantially as will be hereinafter described and claimed.

In the annexed sheet of drawings I have represented a sawing-machine in side elevation, together with the mechanism for actuating the same, which is provided with my improved counterbalancing or compensating devices.

In the draWing,I denotesa cant orlog upon which the saw or saws J are acting for the purpose of cutting the same into lumben H denotes the mill-floor.

It will be noted that the saws J reciprocate vertically and that the mechanism for actuating the same is arranged in the usualmanner beneath the mill-floor. This mechanism for actuating the saws consists, essentially, of the steam-cylinder A, containing a piston whose rod 13 reciprocates in a horizontal direction and carries at its outer end the cross head 0, to which is pivotally connected the engine-pitman D.

E denotes the main shaft, on Which is mounted the counterbalancing device F, made of any suitable size and shape, it being very much heavier upon one side of the shaft than it is upon the other side thereof. To this latter and smaller port-ion of the counter balance F the engine-pitman D is pivotally connected by means of the pivot 11 or by some other similar and suitable device. The gangpitman G is also connected to the counter-balance F at a point opposite to its heaviest part, and is shown in the drawing as being attached to said counter=balance by means of the pivot b. The gang-pitman G is connected to the lower end of the gate for the reciprocating saw or saws by means of the connection a, as shown in the drawing.

The cross-head O is made of suitable size, shape, and weight, so as to properly balance the counter-balance F, so that when the machine is running rapidly there will be no swaying motion to overcome and no heavy foundation will be required to uphold and properly support the several parts of my machinery, and so that the motion of the mechanism during the operation of the saw may be simple, uniform, and steady, and not subject to jerks or fluctuations.

From this description of the construction of my improved counterbalancing mechanism for reciprocating sawing-machines it will be seen how extremely simple and effective the same will be in operation. As the cross-head 0 moves back and forth horizontally and rotates the counterbalancing device F on the shaft E, it will be evident that the continued rotation of this part F will give to it oonsiderable momentum, which will be sufficient to carry the gang of saws past the center when they are in an exactly-balanced condition. Since the crosshead O is made heavy itwill balance the counterbalanceweight F, and the motion of the several parts will be even and uniform My improved machinery Will therefore be cheap in construction and efiective in operation, and the advantages to be subserved by the use thereof, as hereinabove detailed, will be evident to any one skilled inthe art.

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

The combination of the saw-gang J, the

main shaft E, the counter-balance F, mounted thereon, said counter a balance being constructed, as described,with the part on one side of the shaft much heavier than the part on the other side thereof, the gang-pitman G, connected to the saws and pivotally attached to the smaller portion of the counterbalance F,

the engine cylinder, its piston and piston:

rod, the heavy cross head carried by said rod,

said cross-head and the counter-balance being In testimony whereof I aflix my signature in suitably proportioned as to Weight, and the presence of two Witnesses. en gine-pitman connected to the eross-head and pivotally attached to the smaller portion ALFRED J. \VILCOX. 5 of the counter-balance near the pivotal e011- neetion of the gang-pitnian, all of said parts Vitnesses: being combined and operating substantially ARTHUR JONES, in the manner and for the purpose described. A. \V. EGGERT.

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