US1030885A - Wood-sawing machine. - Google Patents

Description

E. GRAHAM. WOOD SAWING MACHINE.

APPLICATION FILED JAN. 15, 1912.

Patented July 2, 1912.

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COLUMBIA PLANOURAPH co wasnmvroN. D. :4

E. GRAHAM.

WOOD SAWING MACHINE.

APPLICATION FILED JAN. 15, 1912.

- 1,030,885. 7 j I Patented July 2, .1912.-

3 SHBETB-SHEET 2.

COLUMBIA PLANOGRAPH CO.,WASHINOTON. 11.5.

E. GRAHAM.

WOOD SAWING MACHINE.

APPLICATION FILED JAN.15, 1912.

1,030,885, Patented July 2, 1912.

3 BHEETS-SHEET 3 TABS PATENT ornrcn.

EDWARD GRAHAM, OF LEBANON, TENNESSEE, ASSIGNOR TO GULF RED CEDAR COM- PANY, 0F RICHMOND, VIRGINIA, A CORPORATION OF ALABAMA.

WOOD-SAWING- MACHINE.

Specification of Letters Patent.

Application filed January 15, 1912. Serial No. 671,188.

To all whom it may concern:

Be it known that I, EDWARD GRAHAM, a citizen of the United States, and a resident of Lebanon, county of Wilson, and State of Tennessee, have invented certain new and useful Improvements in VVood-Sawing Machines, of which the following is a full and clear specification, reference being had to the accompanying drawings, in which Figure 1 is a side elevation; Fig. 2 a similar view looking at the opposite side of the machine; Fig. 3 an end elevation; Fig. 4 a plan view; Fig. 5 a View looking at the side opposite that shown in Fig. 3. Fig. 6 is a section through the gage.

This machine has reference to that class of machines adapted for sawing slabs from a block of wood, the slabs being especially intended to be cut up for use in making lead pencils, as more fully hereinafter set forth.

Referring to the drawings by letter, A designates the base of the machine and B the saw shaft or arbor journaled in suitable bearings on the base and carrying the vertical saw G, which projects above the top of the base and lies in a vertical plane at one side thereof.

Mounted on one of the side faces of the base is a bracket a, a suitable screw device 6 being employed to vertically adjust this bracket. In the upper forked end of this bracket is pivoted the rear end of the block holder 0, said pivot being arranged parallel with the arbor of the saw and the block holder being adapted to swing upwardly and downwardly in a plane parallel to the plane of the saw. This block holder is trough shaped and the block is adapted to be slid along therein toward and from the saw. This block holder is counterbalanced by a rearward ext-ending rod cl carrying an adjustable weight 6, and it is raised and lowered manually by means of a hand lever f projecting forwardly from the forward end of the holder.

Extending upwardly through the forward end of the block holder is a rod 5/, adjustably clamped by means of a bolt h, the depending end of the rod 9 being pivotally connected to a depending rod 2', which rod 2' depends into the tubular base of the ma chine and through a hole in abracket j, the lower extremity of this rod being provided with a head which prevents it being withdrawn upwardly through the bracket y". A coil spring is surrounds the rod 2' between the top face of the base and a suitable washer Z, this washer being adapted to abut against the lower extremity of the rod g and to rest upon the upper end of the spring 70. TVith this connecting device, it will be observed that the upward swing of the block holder is limited by the head of the rod 2', and the downward movement of the block holder is limited as well as cushioned by the spring k.

The trough part of the block holder extends close to the plane of rotation of the saw so that when the end of the block is slid beyond the end of the trough and the block holder is pressed downwardly against the action of the counter-weight, the projecting end of the block will be carried against the rotating teeth of the saw. Suitable means are provided for regulating the distance the block shall project beyond the block holder as this distance determines the thickness of the slab that is to be cut off the block. In the present machine I have illustrated a ver' tically arranged gage plate on, supported in such relation to the block holder that when the same is in its normal or raised position the gage plate will be in line with the trough or channel of the holder and will thus form an abutment against which the end of the block is pressed during the act of sawing off the slab. This gage plate is 1nounted.on the end of an internally threaded tube n and this tube is slidably mounted in a bar 0 rigidly supported in any suitable manner on the base. The screw stem of a hand screw 79 enters the tube a, so that by rotating the screw 79 the gage plate may be adjusted to and from the plane of movement of the block holder.

The bar 0 is supported at one end by a standard 9 rigidly supported on the base by a bolt and slot connection whereby it will have a vertical adjust-ability with reference to the base. The other end of the bar 0 is adjustably supported by means of a horizontal bolt 1* whose inner end is rigidly supported in a slotted standard 8 bolted to the top face of the base. With a support of this construction the gage plate may be readily vertically adjusted and set so as to be in proper position with respect to the saw and the block holder.

It is essential thatmeans be provided for clamping the sawed 01f slab during the act of sawing, and for this purpose I have pro vided two clamps t and u, these clamps being supported respectively at opposite sides of the channel of the block and outside of the saw. The clamp 14 is rigidly attached to the block holder, its upper end being riveted to the upper end of a bracket arm 41 rigidly attached .to the upper face of the block holder adjacent to the plane of rotation of the saw, a suitable spacing fillet being employed to bring the jaw u out far enough to depend beyond the outer face of the saw, so that its lower serrated edge shall be in position to engage the end of the slab being sawed off. The other jaw 25 is slidably mounted in the end face of the block holder at the side of the channel opposite from the jaw t, this jaw being also off-set from the block holder sufliciently to lie outside of the 'saw. This slidable jaw is actuated by the raising and lowering of handle f, the handle being provided with a depending lug m which engages a notch in the upper edge of the jaw, so that when the handle is pushed down to carry the block down past the saw, the same action will rotate the handle on its pivot suificiently to force the jaw inwardly against the adjacent end of the slab being sawed ofi". \Vhen the block holder is lifted upwardly by means of the handle, that action will withdrawthe jaw and thus release the sawed oif slab. A suitable stop lug y is provided for limiting the upward swing of the handle and a suitable stop lug z is provided for limiting its downward swing.

It is believed that the operation of the machine will be apparent from the above Copies of this patent may be obtained for description and that therefore a separate and detail description of the operation is unnecessary.

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

1, In a machine of the classset forth, a rotary saw, a vertically movable block holder carrying means for clamping the portion of the block to be sawed off during the act of sawing, a handle for raising and lowering the block holder, and means whereby the act of moving the block holder by means of said handle causes said handle to clamp the block on the down stroke and to unclamp and release the sawed 01f piece on the up stroke.

2. In a machine of the class set forth, a rotary saw, a vertically movable block holder consisting .of a trough forholding the block, a gage or stop plate m, and means for supporting it beyond one end of the trough, said means embodying a supporting bar and means whereby said bar 'may be in dependently adjusted at each of its ends, and telescopic screw means attached to the gage plate and supported onsaid bar for adjusting the gage plate toward and from the trough.

3. In a machine of the class set forth, a rotary saw, a vertically movable block holder, a pair of clamping jaws carried thereby and overhanging the saw so as to clamp the slab as it is being sawed off, and means for moving one of the jaws into clamping action.

In testimony whereof I hereunto afiix my signature in the presence of two witnesses.

EDWARD GRAHAM.

Witnesses:

JOHN H. MUNFORD,

J. C. SROLE.

five cents each, by addressing the Commissioner of Patents, Washington, D. O.

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