US614263A

US614263A - ewart

Info

Publication number: US614263A
Authority: US
Publication date: 1898-11-15
Anticipated expiration: 1915-11-15

Description

N0. 6|4,263. Patented NOV. [5, I898. S. F. EWART.

ADJUSTABLE CROSSCUT SAWING MACHINE.

(Application filed Sept, 29, 1896.)

3 Sheets-Sheet I.

(No Model.)

filw t mash-W w: Norms PETERS cq. mom-mac WASHINGTON. n. cy

No. 6l4,263. Patented Nov. l5, I898. S. F. EWART.

ADJUSTABLE CROSSCUT SAWING MACHINE.

(Application filed Sept. 29, 1896.)

(No Model.) 3 Sheets-$heet 2- Tugnonms versus cc. PHDYOUTHO,WASNKNGTDN. 0 cv No. 6l4,263. Patented Nov. I5,' I898.

8. F. EWART.

ADJUSTABLE CRUSSCUT SAWING MACHINE.

(Application filed Sept. 29, 1996. odel.) 3 sheets-Sheet 3.

NITED- STATES PATENT OFFICE.

SAMUEL F. EWART, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO ELIZABETH FLO EWART, OF SAME PLACE.

ADJUSTABLE CROSSCUT-SAWING MACHINE.

SPECIFICATION forming part of Letters Patent No. 614,263, dated November 15, 1898.

Application filed September 29, 1896- Serial No. 607,288. (No model.)

To all whom it may concern: 7

Be it known that I, SAMUEL F. EWART, a citizen of the United States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Adjustable Oro'sscut- Sawing Machines; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of referencemarked thereon ,which form a part of this specification.

My invention relates to an improved machine for cutting lumber in any desired lengths for the manufacture of boxes, 850.; and it consists in an apparatus capable of crosscutting boards to any desired length, as indicated by an adjustable gage, a means for regulating and controlling the length of board or strip of lumber passing through the machine, a means for moving a rotatable saw across the board to divide the same, a means automatically stopping the forward movement of the lumber, togetherwith the certain details of construction and combination of parts, as will be fully described hereinafter.

In the accompanying drawings, Figure 1 is a plan View of myimproved machine for crosscutting boards or strips of lumber to any de sired length, which is constructed and arranged in accordance with my invention, the said view having the table removed the better to show the inner working parts. Fig. 2 is a side sectional elevation of the same, said section taken on the line X X of Fig. 1. Fig. 3 is a sectional end elevation taken on the line Y Y of Fig. 1. Fig. 4 is an enlarged face view of the ratchet-wheel disk and pawl for operating the release-lever of the gage to open and close the clutch for operating the feed-rollers. Fig. 5 is an end elevation of the same. Fig. 6 is a central sectional plan view taken on the line Z Z of Fig. 4. Fig. 7 is an enlarged detailed side elevation of a portion of the clutch-bar, showing the spring for operating the same. Fig. 8 is an enlarged detailed side elevation of the gage-bar, together with the adjustable gage and means for retracting the bar.

To put myinvention into practice and thereby provide a machine capable of crosscutting lumber in any desired lengths, I provide a frame 4 of a suitable size and form of construction and mount therein in suitable bearings a strong shaft 1, connected to a powershaft by means of a belt and tight and loose pulleys 5 in order that the said shaft may be given a rapid rotary motion. Arranged upon this shaft 1 is a large pulley 6, which transfers the rotary motion to a small pulley 7, mounted upon a pivoted arm 6. This pivoted arm is also fitted with a large pulley 8, which is connected bya belt to the small pul ley 9 for operating the saw 14, and the shafts to these last-described pulleys connected the one with the other by a connecting-bar 10. This construction and arrangement of the

pulleys

6, 7, 8, and 9 will give the saw 14 a rapid rotarymovement and at the same time permit the saw to be moved back and forward along suitable guides or slides 50. Mounted upon these slides is a cross-head 11, carrying the saw 14 and the small pulley 12. Connected to a downwardly-projecting lug 13, integral with the cross-head 11, is a pitman 49, the other end of which is attached to a crank 48, mounted upon one end of 'a shaft 38, arranged in suitable bearings upon the frame 4. This shaft 38 is driven by means of a small pulley 15, connected to the drive-shaft 1, a belt 17, connected to a large pulley 16, mounted upon a counter-shaft 35, a pinion 36, attached to the said counter shaft 35, and a large toothed wheel 37, loosely mounted upon the shaft 38, a ratchet-wheel mounted upon the hub of the said toothed wheel, and a disk 40, firmly attached to the shaft 38, having a pawl 42 to engage with the ratchet-wheel 39 to lock the said disk 40 and the toothed wheel and ratchet together in order that the three parts may rotate with the shaft 38 when desired.

This rotation of the disk 40 is for the purpose of engaging and disengaging a clutch 24 to rotate and stop the feed-rolls 31. ing and stopping of the rolls 31 is accomplished by means of the board or strip of lumber 51 coming in contact with an adjustable piece 29, attached to a gage-bar 27. This bar 27 when moved in the direction of its length will release another bar 26, bearing against the same, arranged at right angles therewith, and permit the said bar to move forward a This startl .in a recess 41, formed in the periphery of the disk 40, will permit the pawl .42 to engage with the teeth of the ratchet-wheel 39 and lock the toothed wheel 37, the ratchet, and the disk together, and the three will rotate with the shaft 38.

Within reach of the eccentric 45 during the rotatable movement of the disk is an inward] y-projectin g portion 46, integral with a bar 46, pivoted to the frame at its base, and having its upper extremity connected by a link 47 to the horizontally-arranged bar 26. This eccentric-piece will when brought in contact with the projection 46 move the bar 46 about its pivotal point to the left, and thereby draw the upper bar 26 in the same direction, which will permit the gage-bar 27 to slide past and lock said bar in that position. This movement of the bar 26 will engage the clutch 24 to rotate the rolls 31 .to feed the board 51 forward. The rotatable movement of the disk 40 still continuing to complete the revolution will bring the roller 43 in contact with an inclined surface at the rear of the projection 46', and the said roller moving along the same will turn the pawl about its pivotal point to disengage the same from the teeth of the ratchet, and thereby stop any further rotation of the disk 40 and its connected crank 48. This one revolution of the disk will operate the crank 48 to give the same one complete revolution, which will move the saw back and forward to divide the board passing through the feed-rollers 31. The rotary movement of the rollers 31 is derived from beveled pinions 21 22 and the shaft 20, attached to one of the said gear and having at the opposite end a large toothed wheel 19, which meshes with a pinion 18, mounted upon the counter-shaft 35. Theclutch 24 may be thrown out of gear to stop the rolls 31 at any time by means of a small hand-lever 28, operating against a projecting pin 27 attached to the gage-bar 28. The upper roll of the feed-rolls 31 is mounted in sliding bearings 34 and held tightly against .the board 51, passing through by means of strong spiral springs 33, which arrangement will permit boards of various thickness to pass through the machine.

In operation a board 51 is introduced between the rolls 31, the clutch 24 being engaged to rotate the said rolls. The said board moving forward until in contact with the adjustable stop 29 carries the same backward a short distance until the bar 26 is permitted to move to the position shown at Fig. 1 on the drawings. This movement of the bar 26 will disengage the parts of the clutch 24 to stop the movement of the rolls and also move the lever 46 to the right, which will permit the roller 43 to drop into the recess 41 and allow the pawl 42 to engage with the ratchet 39 during a single revolution of the disk 40, which will operate the crank 48 to move the saw 14 back and forward to divide the board. The eccentric-piece 45 during the revolution of the disk 40 will now move the lever 46 to the left, withdrawing the bar 26 from the position shown at Fig. 1 to permit the gage-bar 27 to pass behind the same to lock the clutch in this position until the board 51 again moves the gage-bar 27 back to out another length.

The hand-lever 28 is only used to saw the ends of the boards or to out bad portions from any part of the same.

Bythe use of the above machine boards may be cut to any desired length, as the gage 29 may be set at any of the openings 2S,which represent certain distances from the saw.

It is obvious that various slight modifications may be made in the details of the machine without departing from the spirit of my invention. Therefore I do not confine myself to the exact construction shown and described.

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

1. In combination with the feed-rolls of a wood-sawing machine, a clutch mounted on the shaft with one ofsaid rolls, a ratchetwheel and paw], means for disengaging the ratchet-wheel and pawl, a crank operated by the ratchet-Wheel, a bar 26, a second bar 27, means whereby the material operated upon abuts the bar 27 and throws it out of engagement with the bar 26, an arm carried by the bar 26 operating the clutch, a connection between the bar 26, and the device controlling the ratchet-wheel and pawls and a cross-head carrying a saw operated by said crank, substantially as described.

2. In combination, a cross-head suitably mounted, a saw mounted thereon, feed-rolls, a clutch mounted on the shaft with one of said rolls, a disk, a pawl, a ratchet-wheel, means for allowing the pawl to engage the ratchet at predetermined intervals, a crank actuated by the action of the pawl and ratchet whereby the cross-head is moved, a bar having an'arm engaging and operating the movable section of the clutch, means whereby the material passing through the rolls releases the bar and thereby disengages the clutch members and means for moving the bar when released, as and for the purpose described.

In testimony whereof I affix my signature in presence of two witnesses.

SAMUEL F. EWART.

Witnesses:

JAs. J. MoAFEE, ALBERT J. WALKER.