US289094A

US289094A - Oley c

Info

Publication number: US289094A
Authority: US
Publication date: 1883-11-27
Anticipated expiration: 1900-11-27

Description

(No Model.)

O. G. HANSON.

SHINGLE SAWING MACHINE.

Patented Nov. 27, 1883.

lNvENTUR Wi'TNESEt-LS u, FHERS mxwmh im. Washington. In;

Uniren STATES PATENT @rrrcs.

OBEY G. HAL SOX, OF EUREKA, CALIFORNIA.

SHlNGLE-SAWING MACHINE.

SPECIFICATION forming part of Letters Patent 1T0. 289,094, dated November 27, 1883.

Application filed June 4, 1883. (X model.)

. Zo rtZZ whom it may concern.-

Be it known that I, OLIEY G. Hanson, of Eureka, California, have inventedlnew and useful Improvements in Shingle-Sawing Ma chines, of which the following is a specification.

My invention relates, first, to a device for automatically moving the shingle-block after each shingle is cut a distance sidewise upon the carriage equalto the thickness of a shingle, which feed-motion shall proceed during the whole of the time that the block is clear of the saw and cease when the saw and the block are in contact, both as the carriage is moved forward and drawn back. The object of this part of my invent-ion is to prolong the time of the feed-motion as much as possible, so as to avoid all sudden and jerky action, and still have the feeding entirely completed while the shingle-block is out of contact with the saw.

The second part of my invention relates to air-improved manner of applying the counterweight, which presses down the upper feedroller, so as to avoid excessive vibration from the quick motion of the carriage.

I obtained Patent No. 235,233, dated December 7, 1880, for an improved shingle-sawing machine, to which this present invention is intended to be applied, and it is in connection with this machine that I will now describe it.

In the accompanying drawings, Figure 1 is a side elevation of such parts of my old machine as is necessary to show to illustrate the present invention. Fig. 2 is an end view of the same.

In both figures the same letters indicate the same parts.

A is the frame of the machine. 13 is the saw. C is the carriage, which carries the block of wood from which the shingles are sawed. D is the upper-side feed-roller, and D is thelower one. 1* is the rod which communicates a reciprocating motion to the carriage in the actof feeding the block to and withdrawing it from the saw. G is the revolving crank which produces this motion. The motion this crank gives is not regular, but is retarded duringt-he period when the sawing is actually being done, and is greatly accelerated when the carriage is being drawn back. Thus far the parts are similar to those described in my previous patent.

My improvements I will now describe: The connecting-rod F is now made to form a lever of the first order by adding an extension, f, beyond where it connects with the carriage.

perpendicular lever H, which swings back and forth upon its pivot to operate the pawls I I,

which are secured on the ends of the feedingrollers. The motion of the rod F is constant, because while the machine operates the carriage C is always moving one way or the other; but the motion of the lever H must be intermittent because the side feeding must entirely cease when the block is in front of the saw. It follows therefore that some peculiar method of transmitting motion from one to the other must be employed. The means of transmitting this motion constitute the principle part of my present invention, which may be described as follows: The lower end of the upright lever H is extended to reach the lowest.- point the extreme end of the lever F vibrates to, where both bear against each other. Here the lever H has a beveled edge, which crosses the path of the lever F in such amanner as that when the lever F vibrates in a true vertical plane it will follow up this beveled edge and push the lever aside. The beveled edge, however, is limited in extent, and may be much less in length than would correspond with the length of vibration of the end of the lever F. From where the bevel ceases the edge of the lever may continue in a true vertical line, so that when the lever F slides along its surface, which will then be parallel with its plane of motion, no further pushing aside of the lever II will take place.

The above explains how the lever H is pushed aside or vibrated in one direction. To draw it back or vibrate it in the other direction, Ihave a frame, K, made fast to the lever H by a couple of bolts, a a. The interior of this frame forms, as it were, a slot, which follows parallel with the beveled and perpendicular edge of the lever H. As the end of the lever F plays up and down in this slot, any desired peculiarity of side motion may be obtained corresponding with the shape given to which engage with the ratchet-wheels J J;

Its vibratory motion is made to act upon the ill the slot. By adjusting all the parts, including the sliding crank, the side feed is made to occur at the time the block is away from the saw.

The reason why the frame K is made separatefrom the lever H is because it is often necessary to make an adjustment as to the eX- act moment of ending and commencing the motion of the lever H. If the frame and lever were solid, as of one piece, no adjustment could be had; but separated the frame can be moved up or down on the line of the bevel, the bolts to a having slotted holes for that purpose, so that any particular adjustment may be had. The ratchet-wheels on the end of the feed-rollers are not provided with teeth equidistant apart, the teeth occurring in pairs sep arated by the space of one tooth; or, in other words, every third tooth is left out. The object of this is to alternately feed each roller a long and a short space, to obtain a wedgeshaped shingle thick at one end and thin at the other. The pawls of course have an unvarying swing back and forth, and if the ratchet-teeth were equally spaced apart a regular action in feeding the shingle-block would result, and the shingle would be the same thickness throughout; but when every third tooth is left out the effect is as follows: The upper pawl swings forward and the lower one swings back. The upper pawl just overlaps a tooth, and all its back motion will be effective in feeding the upper side of the shingle-block, while the lower pawl, having met a toothless space on the ratchet-wheel, loses half its return motion and does not commence to turn the roller until it meets the obstruction of a tooth. Thus the shingle-block at the bottom is fed only half a space. Upon the next stroke the matter is reversed, the lower pawl immediately engages, while the upper pawl loses a tooth, and the shingle-block is fed a full space at the bottom and only half a space at top, and so on, constantly alternating to saw out wedgeshaped shingles, now thin edge up and again thin edge down. Upon the end of the lever F, where it plays up and down .in the frame K, there is provided a frictionroller, K, which is held in place with a split pin passed through the lever.

The next part ofmyiuvention isthe improved method of attaching the counter-weight, which produces a downward pressure on the upper feed-roller. Heretofore the lever carrying the weight has been arranged to stand at right angles to the line of motion, and in consequence the machine, when in operation, has had a very shaky, tremulous motion. I now arrange to have this counter-weight and its lever stand parallel with the plane of motion, which gives far greater steadiness to the machine. This new arrangement involves some changes in the parts.

L is a lever of the second order. It hangs the spanner P, which in turn bears down,

upon and is bolted to opposite ends of the cross-bar Q, which slides up and down between guides in the frame of the carriage, and which cross-bar carries the bearings for the feed-roller.

R is an adjustable weight. As it is moved back and forth on the lever, it gives more or less pressure. The opposite end of the lever is connected by a link, S, to the hand-lever T, which has its fulcrum at t on the frame of the carriage. The lever L stands parallel with the saw and line of motion of the carriage. \Vhen the shiugle-block is being placed on the carriage, the hand-lever T is pressed down ward, which action cants the lever L, so as to release the feed-roller from the pressure of the weight R. WVhen the block is set, the handlever is released, and the weight bears down sufficiently to insure the proper action of the feed-roller. The parts may be arranged on either side of the carriage.

\Vhat I claim as my invention, and desire to secure by Letters Patent, is as follows:

1. In a shingle-sawing machine, an automatic side-feeding device consisting of two ratchet-wheels secured one upon the end of each of the feed-rollers which feed the block to the saw, which ratchet-wheels are operated by two pawls engaging therewith, which are pivoted on an upright lever swinging on a fulcrum projecting from the frame of the carriage, said lever having a slotted frame on its lower end, in which the vertically-vibrating end of the connecting-rod which communicates motion to the carriage plays to communicate an irregular motion thereto, as and for the purpose herein described.

2. In combination with the side-feed mechanism of ashingle-sawing machine, the adj ustable slotted frame K, having a compound vertical and slanting slot, in which a moving part of the forward and back feed may play to transmit an irregular and intermittent motion to the side-feed machinery, to which said frame K is attached, and is adjustable thereon to permit the exact adjustment of the motion, as and for the purpose herein described.

3. In a shingle-sawing machine, the adjustable feed-roller compress herein described, consisting of the lever L, having its fulcrum suitably sustained on the carrying-frame, the weight It, adjustable thereon, and the handlever T, having its fulcrum also on the carriage, and being suitably connected with the end of the lever L, substantially as and for the purpose described.

OLEY C. HANSON.

lVit-nesses:

GEORGE IARDY,

JAS. M. THoMrsoN.