US113217A - Improvement in saw-mills - Google Patents

Description

W. DEAN SMITH AND ANDREW J. CHASE, 0F UNIONQNEW YORILfH Lettersvraent No. 113,217, dated Marches, 1871.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern:

Be it known that we, W. DEAN SMITH and AN- DREW J. CHASE, both of Union, county of Broome and State of New York, have invented certain new and useful Improvements in Saw-Mills, of which the following is a full, cleaigand exact description, reference being had tothe-accompanying drawing making a part of this specification, iu which- I Figure l is a perspective view of the improved devices;

Figure 2, an end elevation, partly in section; and

Figures 3, 4, 5, and 6 are detached views, showing some ofthe parts in diierent positions.

The first part'of the invention relates tothat class of saw-mills in which the knees which feed the log orv 10g-cant laterally forward upon the head-block are `actuated by means of pinions which engage with toothed racks upon the under side of said knees, the construction and arrangement of devices being usually such' that both ends of the log are carried forward simultaneously.

This part of the invention consists in a novel construction and combination of devices whereby a single pinion, which is driven continuously Yin one direction, is made to move the knees either forward or backward such distances and at such times as may be desired by the operatonboth the direction and the distance traveled by said knees being indicated upon'a 'disk or dial-plate so `located as to be readily seen by the attendant.

The second part of the invention consists in slotting the side pieces or stri'ngers of the carriage upon which the head-blocks rest, and connecting said head-blocks (one or both) with the carriage, by means of a tongue or tenon, which Vis framed into the slot, in a manner which will be hereinafter described, so that the head-V blocks may be readily adjusted to receivelogs of different lengths.

In the drawing- A represents the door of the mill;

B B are posts; and

C C, girts forming' a frame-work, upon which are mounted various parts of the mechanism.

D is a side piece or stringer of the carriage. 'lhere may be, if preferred, two of these stringers, one upon each side.

These stringers may be connected by forming a carriage, upon which the head-blocks are supported.

The head-block is composed of bed-pieces E E, girts El, and ways Ez, in which .the knees `.E3 slide freely, as will be readily understood from the drawing with out further explanation.

Each Stringer is slotted, as at d, figs. 1 and 3, and

girts, thus the girts Earetenoned so as to pass through and move freely in said slot.

The girt El is shouldered, as at e e, iig. 3, the outer end of the tenon being confined in bed-piece E, there by locking the head-block securely to the carriage, and yet permitting it to slide longitudinally thereon when required.

F is a gear-wheel, mounted on a shaft, F', (shown Yin iig. 3,) which runs lengthwise of the carriage below g the head-block.

This shaft drives two spur-pinions, G, one ot`- which is mounted in and travelsfwith each of the headblocks, a'hd is connected, 4by. means of transmittingpinion G-l, witha toothed rack, G2, secured to the lower side of the knee. `\j

Piuions G are mounted loosely upon shaft F'; that is, they can slide lengthwise of the shaft with the head-blocks, but they are keyed or feathered toit, (the shaft,) so as to revolve with it. Thus a rotary movement of wheel I` imparts a reciprocating motion to the knee, as will be readily seen,

H is a hollowshaft, mounted in a vertical position in theframe-work, so that it can slide' up and down freely. It rests at the bottom in a suitable step on one cud of -a lever, I, located below the door A and. pivoted at I1.

The opposite end of this lever is actuated by a pin, I, or its equivalent, which passes lthrough the door, and also by another lever, which will presently be described.

Ia is a slotted or forked guideblock, attached to the door near that end of lever" I which supports shaft H, and serving to prevent any lateral motion of the lever and of the bottom ofthe shaft.

J is a bell-crank, pivoted to lever I at t'.

J is a locking-plate or stop, made preferably of metal', and secured to the lower end of the guideblock I.

K is a tripping-rod, located within the-hollow shaft i H, and connected with the horizontal arm of bellcrank J.

K' is a disk secured to the upper end of tripping` .rod K.

The upper end of tubular shaft H is with a coarse right-hand screwfthread.

H1 is a toothed nut, the thread of which corresponds to that upon shaft H, so that, by turning it (the nut) around, it may be moved up or down upon the shaft, in a manner and for the purpose which will be hereinafter explained.

'H2 is a spur-wheeLkeyedto the upper end of shaft H. y

Fig. 6 represents a'tripper, composed of a collar, L, from which risefour stems, l. v

providedvr I, the tripping-rod K, bell-crank J, stop J f, disk K', and nut H1.

4. The combination of vibrating arm O1, shafts O P', gears I O, and nut H, substantially as described. y 5. The combination of shafts OVP, gears P O1 O O3 HZ with nut H1, tripper L l, and shaft H, as set forth.

6. The slotted side piece or Stringer D, in com# biuation with the tenoned girts E1, bed-piece E, and

ways E2, these parts being constructed and arranged substantially as described, whereby the head-block may be adjusted longitudinally upon the carriage, as

set forth W. DEAN SMITH.

ANDREW J. CHASE.

Witnesses:

E. R. SHEPARD,

L. D. WITHERILL.

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