US274227A - Saw-mill carriage - Google Patents

Description

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0 SGHOGH SAWMILL CARRIAGE. v

Patented M21220, 1883.

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G. SGHOGIL SAW MILL CARRIAGE.

Patented Mar. 20,1883.

N. PETERS. Plmtv-Li lwgnphe UNITED STATES PATENT in ros.

SAW-MILL CARRIAGE.

SPECIFICATION forming part of Letters Patent No. 274,227, dated March 20, 1883.

Application filed J annary 2, 18$. (Iiio model.)

To all whom 'it may concern I Be it known that I, OASPAR ScHocH, of

Truckee, county of Placer, State of California,

have invented an Improved Reciprocating Carriage and Automatic Block-Set for Saw Mills; and I hereby declare the following to be a full, clear, and exact description thereof. My invention relates to new and useful iiu-- provements in traveling carriages and automatic block-sets for saw-mills.

The improvements consist generally in a novel means forreciprocatin g the carriage and and in a novel means for setting over after each cut the block or timber for a new out.

More specifically, my invention consists in .a double rack upon the carriage, an adjustable spur-gear adapted alternately to engage either directly or indirectly with each of said racks to advance or return them, a trip-lever to which said spur-gear is attached, and suitable catches engaging therewith, and stops to trip the catches, whereby at the end of each stroke the trip-lever is vibrated to throw its spur-gear in and out of engagement with the racks; further, in a pawl-and-ratchet mechanism operated by a swinging arm engaged indirectly by a weighted lever and moved by its fall when released at the end of the returnstroke of the carriage, whereby the block or timber-holder is set over for a new cut; further, in the adjustability of certain of the catches and stops, whereby the stroke of the carriage may be lengthened or shortened, all of which will hereinafter fully appear. My object in this invention is to provide a ready and effective means for automatically reciprocating the carriage and setting over the block, andto dispense with the weight which is ordinarily used to return the carriage.

Referring to the accompanying drawings, Figure l is a perspective View of my device,

r showing carriage B advancing. Fig. 2 is a detail of Fig. 1, showing the spur-gear d in engagement with rack b. Fig. 3 is an elevation of my device, showing carriage B at the limit ofits return, the pointed lever 0 being depressed and the gear at being in engagement with pinion e. Fig. 4. is a detail showing jointed lever 0, its points of pivot, its forward catch, and driving-shalt D. Y A may represent the foundation; B, the carriage adaptedto travel thereon. Under the edge of the carriageis arack, b,while another, b, is formed upon the outside.

G is a long jointed lever, pivoted in two places, at c and c, Fig. 4. This lever is shown clearly in Fig. 4, its joint being at c, and formed by the loose insertion ot'a tongue on one part into a socket upon the other.

D represents the driving-shaft, not journaled in the foundation, but in the jointed triplever G, as shown in Fig. 45. This shaftcarries a spur-gear, d, adapted to engage directly with the rack b above it, as shown in Fig. 2.

E is a short shaft secured in the foundation, upon which is mounted a gear-wheel, 6, having an inner flange or collar shaped into a small pinion, 6, Figs. 2 and 3. The gear 0 meshes with the outer rack, I), while the pinion e is in line with and is adapted. as I shall show, to be engaged by the spur-gear at when the latter is thrown out of engagement with its rack 11, Fig. 3.- This movement of the spurgear at is caused by the alternate elevation and depression of the joint of the trip-lever, operated from each end as follows: Near one end of the foundation is a pivoted notched catch, F, held to its place by spring f. Near the other end is another such catch, G, held to its place by a spring, 9. One end of. the trip-lever 0 is adapted to engage with and be held down by the catch F, and the other end to be supported by the catch G, according as each end is raised or lowered.-

H is a double-armed spring, one arm of which is attached under the end of the lever U. The other passes up under the carriage B, and is adapted to be moved back and forth to influence theotherar'm by means oi'an inclined plane, a and a pin, ct. under said carriage,

Fig. 3. Another pin, a, near the other end of the carriageis adapted to come in contact with catch F, Fig. 3. Y

The operation of these devices is as follows: Suppose the carriage to be in the position shown in Fig. 1, in which the long arm of the lever C is depressed and held down by the engagement of the short arm with the catch F. In this position the joint of the lever is thrown up,'and its spur-gear d isi'n direct engagement with the raok'b. This engagement is furthershown in Fig. 2. The revolution of shaft D causes the progression of the carriage in O armJ,engages. Bymoving this arm the'pawl pin a comes incontact with and forces back catch F. This'releases that end of the lever C and allows the spring El (its upper arm be ing depressed by inclined plane 0. to throw up its other end into engagement with catch. Gr. This depresses thejoint of lever (J, throwing its spur-gear at out of engagement with rack band into engagement with pinion 0, when, by the continued revolution of shaft D in the Same direction, 'power is transmitted through pinion e and gearc to the rack b, and

the carriage immediately enters upon its re turn movement in the direction of the arrow, Fig. 3. The position to which the parts are thrown to effect the return is seen in Fig. 3. in which the carriage has completed the return. As it recedes the pin a comes in contact with the upper arm of spring H, Fig. 3, and, forcingit back, causes its other arm to pull down upon lever C. When the end of thecarriage reaches the catch G it forces'it back, releasing the lever 0, when the spring H pulls its end down, throwing down its other end into engagement with catch F and elevating itsjoint to throw its spur-gear out of engagement with pinion e and into engagement with rack b, when the carriage again progresses. This is all accomplished. by the revolution of the driving-shaft D in one direction. The play of the joint is not great, and the end of shaft D being journalednear the joint, it may have sufficient play to move up and down slightly. The carriage Bis the means for carryin g forward to the saw, the timber to be cut. After one cut is made it is obvious that some adjustment is necessary to set the timber over in line of the saw again. This adjustment is of importance,especially in shinglemills, where my invention is particularly applicable. Here is required an accurate and quick automatic adjustment. The means I have devised are as follows At the rear end of the carriage is a standard, I, to the top of which is pivoted a swinging-arm, J, Fig. 1.

K is a horizontal shaft mounted on the carriage, and carrying anumber of toothed wheels,

Jr. Upon the same shaft is a ratchet, L, with which a pawl, Z, extending from theswingingwill feed the ratchet and turn the toothed wheels is.

l have not deemed it necessary in this connection to illustrate the holding mechanism for the block, as such devices and their connections are well known. It is sufficient here to say that in a suitable manner the shingle- -block is held and rested upon the toothed wheels k, and by theirmovement, as described, the said block is set over in line with the saw. A spring, I, returns arm J to its place.

M is a toggle-lever, one end-of which is secured to the carriage, the other end by a rod, m, to the lower end of arm J. A rod, N, is secured to the joint of the toggle-lever M, and hangs down past the end of the carriage, and

has a hook, it, on its end. If the rod N be pulled down, it depresses the joint of togglelever M, forces its loose end out, and through connecting-rod m moves out arm J to feed the ratchet.

O is a slotted plate, secured to the foundation and adapted to be a justed forward or back thereon the length of its slots.

Pivoted to the end of plate 0 is a lever, P,

with a weight, 11. A hooked arm, Q, extends upward from this lever, and is adapted, when the lever is raised, to receive under it the end of the rod N. I

B is a notched catch, weighted and pivoted to the plate 0. Its top is adapted to be engaged by a pin, r, on the carriage. A pimp, on lever P engages with said notched catch, and supports said lever when raised, Fig. 3.

S is an elbow-lever pivoted to the plate 0. One arm extends under the end of lever P, the other up beside the carriage B, behind a pin, .9, projecting from said carriage, Fig. 1. When the carriage is in the position shown in Fig. 1 the pin sis pressing forward the upper arm of lever S. As it progresses it gradually raises its lower arm under the endof lever P,

which said lever is thus raised until its pin 12 engages with the catch B, when it is supported in such position that its hooked arm Q. is raised high enough to receive under it the rod N, Fig. 3. The carriage then returns, and before it reaches its limit the end of rod N passes under the upper end of arm Q, and im mediatel y the pin r forces back catch it, releases weighted lever P,which falls, pulling down arm Q. This depression of arm Q draws down rod N to operate the pawl-and-ratchet feed, as heretofore described.

. It may be desirable at times to shorten or otherwise regulate the travel of the carriage. To do this I remove pin a and set it farther back in the carriage, as shown by dotted pin w, so that it may engage the arm of spring H at an earlier moment, Fig. 1. Then I extend a stop (here shown by an adjustable rod, or, also dotted in) farther back from the rearend of the carriage, so that it may force hack the catch G earlier, Fig. 1; and to make the settin g-over device correspond I adj ust the slotted plate 0 farther forward to meet the shortened travel of the carriage.

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

1. Ida saw-mill, means for reciprocating the traveling carriage, consisting in a double rack racks b b, in combination with thejointed pivoted trip-lever O, carrying a spur-gear, d, at its joint, the gear 0, and pinion e, all'arranged as shown, and springs operated by the traveling carriage to alternately depress and elevate each end of the lever. catches to engage therewith, and stops to trip said lever, substantially as and for the purpose herein described.

3. In a saw-mill, a traveling carriage having racks b b, in combination with thejointed pivoted trip-lever (l, carrying a spur-gear, d, and

driving-shaft D, at its joint, and having an actuating-spring, El, operated by devices on the traveling carriage to alternately elevate and depress each end of the trip-lever, the gear 0, and pinion c, the notched spring-catches F G, engaging with the ends of the lever and forced back by contact with the traveling carriage to release said lever, substantially as and for the purpose herein described.

4. In a sawmill, a traveling carriage having racks b 1), pins a. a, and incline a in combination with I the jointed pivoted trip-lever O, carryinga spur-gear, d, and having an actuating-spring, H, arranged asshown, the gear a, pinion c, and notched spring-catches F G, all arranged and operating substantially as and for the purpose herein described.

5. In a saw-mill, the reciprocating carriage B, horizontal shaft K, having toothed wheels k, and the feed-ratchet L, in combination with the pivoted spring-arm J, connecting-rod m, toggle-lever m, and hanging rod N, and a means operated hy the traveling carriage for depressing saidrod and feeding the ratchet, substantially as and for the purpose herein described.

6. In a saw-mill, the reciprocating carriage B, horizontal shaft K, having toothed wheels k, and feed-ratchet L, in combination with the pivoted spring-arm J, pawl l, toggle-lever M connecting rod m, and hanging rod N, with hooked end, and the means for automatically depressing said rod N and feeding the ratchet, consisting of the weighted lever P, having pimp, hooked arm Q. elbow-lever S, operated by a pin on the traveling carriage to raise the lever P, and catch R, adapted to engage with ping) and support lever P, and to be disengaged by a pin on the said carriage, all arranged and operating substantially as and for the purpose herein described.

In witness whereof I hereunto set my hand.

. U ASPAR SGHOGH. Witnesses:

I. Q. SAMUELS, J. H. BLooD.

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