US571801A

US571801A - Log-turner

Info

Publication number: US571801A
Authority: US
Publication date: 1896-11-24
Anticipated expiration: 1913-11-24

Description

D. J. SALTSMAN.

2 Sheets-Sheet 1,

LOG TURNER.

( 0 Model.)

N0. 571,801. Patented Nov. 24, 1896.

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D. J. SALTSMAN. LOG TURNER.

N0. 571,801. Patented NOV. 24, 1896.

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UNITED STATES PATENT Unison,

DANIEL J. SALTSMAN, OF MEMPHIS, TENNESSEE.

LOG-TURNER.

SPECIFICATION forming part of Letters Patent No. 571,801, dated November 24, 1896.

Application filed August- 19,1896. Serial No. 603,251. (No model To all whom, it may concern.-

Be it known that I, DANIEL J. SALTSMAN, a citizen of the United States, residing at Memphis, in the county of Shelby and State of Tennessee, have invented a new and useful Log l urner, of which the following is a specification.

This invention relates to log-turners; and it has for its object to provide a new and useful log-turning device for use in sawmills in connection with the log-carriage, whereby heavy logs on the log-carriage can be easily and accurately turned automatically by the movement of the l0gcarriagc itself.

To this end the invention primarily contemplates an improvement upon the construction disclosed in my former patent, No. 326,591, whereby log-turners of this character shall be made more efficient and positive in operation, so as to save both time and la bor, and at the same time to provide a construction that can be readily adapted for use in connection with any ordinary circular-saw mill.

With these and other objects in view,which will readily appear as the nature of the invention is better understood, the same consists in the novel construction, combination, and arrangement of parts hereinafter more fully described, illustrated, and claimed.

In the drawings, Figure l. is a perspective view of a sawmill equi pped with the log-turn ing apparatus contemplated by this invention. Fig. 2 is a horizontal sectional view of the construction shown in Fig. 1 above the plane of the log-carriage. Fig. 3 is a vertical transverse sectional view showing the proper relation of parts when the log is being turned in a direction away from the head-blocks of the log-carriage. Fig. at is a similar view showing the parts in the position which they occupy when the log is being turned toward and against the head-blocks of the log-carriage. Fig. 5 is a detail elevation showing the position assumed by thelog-turnin g chain when the trolley reaches the circle or curved stop at one end of the track. Fig. 6 is a detail view of the cant-hook and the portion of the log-turning chain connected therewith.

Referring to the accompanying drawings, the numeral 1 designates the skeleton framework of an ordinary sawmill, within which,

in its usual position, is arranged the upright circular saw 2 for cutting logs in the usual manner as the same are advanced thereto on the log-carriage 3, arranged to travel in the mill on the carriageways 4. The carriageways 4: are arranged longitudinally of the sawmill at one side of the circular. saw 2, so

that as the log-carriage is fed back and forth' by the usual feeding mechanism the log will be sawechand, after a cut, will be given an opportunity to be turned a proper distance for another cut, all of which is the usual method of sawing in a circular-saw mill.

The reciprocating log-carriage Z), traveling on the carriage-ways i, is provided with the ordinary head-blocks 5, against which the saw-log rests, and which bloclcs 5 are set or adjusted transversely of the carriage to adjust the log up to the saw when necessary, as is well understood by those skilled in the art; but the present invention relates exclusively to means for turning the log on the carriage after a out has been made, and in connection with the parts described the framework 1 of the sawmill has fitted therein, longitudinally above the carriage-ways, a longitudinal tracksupporting beam 6, to the under side of which supportingbeam 6 is suitably secured a track- 'rail 7. The track-rail 7 is preferably made of piping and is provided at its opposite ends with the upturned attaching-feet 8, secured to the beam 6 and disposing the horizontal portion of the track-rail below and parallel with the beam.

The longitudinally-arranged single trackrail 7 is provided at one of its upturned ends with a curved or circle stop portion 9, which is braced by a brace-block 10, arranged directly thereagainst and secured to the tracksupporting beam 6 by a bolt 11 or other suitable means, said brace-block 10 acting in the capacity of a brace or reinforce for that end of the rail '7 forming a stop for the trolleywheel 12, traveling on the rail. The trolleywheel 12 is annularly grooved to ride on the upper side of the track-rail and is journaled in the U-shaped bearing-yoke l3, embracing the track-rail and depending below the same. The bearing-yoke 13, carrying the trolleywheel 12, has loosely connected thereto the upper end of the log-turning chain 14, the lower end of which chain has connected.

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loosely thereto one end of the cant-hook 15, the point of which hook is adapted to be engaged at one lower side of the log while it rests on the reciprocating log-carriage 3. The cant-hook 15 is provided intermediate of its ends with an offstanding handle-arm 16, which enables the hook to be easily engaged with the .log, and is provided at its outer end with an eye 17, adapted to be detachably engaged with a securing pin or hook 18, fitted on the body of the log-carriage to provide means for temporarily fastening the logturning chain and its cant-hook to the log carriage, so as to travel with the carriage when no turning of the log is needed, while at the same time holding the said chain and cant-hook in a proper position for use when it is desired to engage the cant-hook with the log on the carriage, as will be readily understood.

The log-turning chain 18 is provided with a spring-section 19, consisting of a coiled spring encircling a portion of the chain and connected at its extremities with separate links of the chain at a distance apart from each other to provide means for normally drawing the cant-hook 15 in an upward direction. The portion of the chain 14 between the terminals of the spring 19 is sufficiently slack, normally, to allow the canthook 15 to be drawn downward and engaged with one lower side of the log, and when thus engaged with the log the hook is held firmly in position by the tension of the said spring or spring-section 19, so that the cant-hook will be held in proper engagement with the log while the log-carriage is traveling backward and until the trolley at the upper end of the logturning chain is brought to a stop by the curved stop end of the track-rail.

At a suitable distance from the saw 2 of the sawmill and at one side of the carriageways 4 are arranged logways 20, from which the logs are usually rolled onto the log-carriage and against the head-blocks 5 thereof; but in the present invention the logways 20 have journaled therein a horizontal adjustin g-shaft 21, provided at one end with an adjusting lever or crank 22, preferably within convenient reach of the sawyer, so that the shaft 21 may be turned to adjust or set to a proper position the oscillatory skid-knees A pair of skid-knees 23 are preferably employed and are located, respectively, at one side of the opposite logways 20. The said skid-knees 23 are mounted fast on the shaft 21, so as to turn therewith, and are provided with rounded contact ends 24, which rounded contact ends 24: are fitted with the metallic facin g straps or bands 25,which protect the working ends of the knees from undue wear and at the same time afford smooth surfaces, against which the log can slide during the operation of turning. The adjusting-shaft 21 for the knees 23 is arranged parallel with the carriage-ways 4, so as to dispose the oscillatory skid-knees 23 at right angles to the movement of the log-carriage, whereby the log will be thrown or turned directly again st the rounded contact ends of the knees as the log-carriage travels past the knees on its return movement.

In operating the log-turning apparatus the adj Listing-shaft 21 is turned so as to dispose the skid-knees 23 obliquely or at an angle, with their rounded contact ends 24 arranged directly at one side of and facing the ways on which the log-carriage travels. On its forward movement the log-carriage carries the log onto the saw and acut is made, and when the carriage begins its backward movement the cant-hook is engaged with one lower side of the log, as clearly illustrated in Fig. 1 of the drawings. As the log-carriage continues its backward movement the log-turnting chain and. its cant-hook 15 necessarily travel with the carriage by reason of the trolley traveling on the single track-rail 7 hen the carriage reaches a position at one side of the logways and skid-knees 23, the trolley 12 will have reached the curved stop end 9 of the track-rail and prevents further travel of the log-carrying chain 14, but when the trolley 12 is brought against the curved stop end 9 of the track-rail the continued backward movement of the log-carriage draws the chain 14 very taut and causes the lower end thereof to swing in the arc of a circle as the cant hook 1.5 tends to disengage itself from the log. This movement lifts and turns the log onto the adjacent rounded contact ends 24c of the skid-knees, and the weight of the log on these knees causes the same to oscillate or drop downward, thereby allowing the log at the same time to drop or slip back onto the carriage against the head-blocks 5 ready for another cut.

lVhile it is preferred to operate the logturner in a manner to turn the log away from the head-blocks of the carriage and onto the rounded contact ends of the skid-knees, it will be obvious that the cant-hook 15 of the logturning chain can be engaged. with. the side of the log opposite the head-blocks 5, so as to turn the log in a direction toward and against said head-block, as illustrated in Fig. 4B of the drawings. In this operation of the turner the cant-hook 15 is not engaged with the log until after the central portion of the log passes the saw 011 the return movement of the carriage, in order that the saw will not interfere with the turning of the log. hen the log is turned toward and against the head-block of the carriage, the skid-knees 23 prevent the log from slipping off the carriage away from the head-blocks while being turned, as clearly shown in Fig. 4.

It will be observed that the brace-block 10 takes the strain of the weight of the log as the trolley strikes the curved stop end 9 of the track-rail, and it will be noted at this point that in the usual operation of the turner the knees 23 take all the strain and weight ofi of the carriage-blocks and track while the log is being turned.

Changes in the form, proportion, and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of this invention.

Having thus described the invention, what is claimed, and desired to be secured by Letters Patent, is

1. In a log-turner for sawmills, the combination with the sawmill log-carriage; of a log-turning chain carrying a hook at its lower end for engagement with the log on the carriage and having a traveling support at its upper end, and a suitably-arranged stop to check the movement of the traveling support of the chain, substantially as set forth.

2. In a log turner for sawmills, the combination with the sawmill log-carriage; of a track-rail arranged longitudinally above the carriage and provided with a stop at one end, and a log-turning chain carrying a hook at its lower end for engagement with the log on the carriage, and having a traveling support at its upper end working on said traolerail, substantially as set forth.

3. In a log-turner for sawmills, the combination with the sawmill log-carriage, of a log-turning chain carrying a hook at its lower end for engagement with the log on the earriage and having a traveling support at its upper end, said. log-turning chain being provided intermediate of its ends with a springsection, and asuita-bly-arrauged stop for the traveling support of the chain, substantially as set forth.

a. In a log-turner for sawmills, the combination with the sawmill log-carriage; of a track-supporting beam arranged longitudinally above the log-carriage, a longitudinal traclerail arranged below the beam and fastened thereto, said track-rail being provided at one end with a curved stop portion, a rigid brace-block secured against the curved stop portion of the track-rail, a log-turning chain carrying at its upper end a troll ey-wheel traveliu g on said track and provided intermediate of its ends with a spring-section, and a canthook attached to the lower end of the chain and provided with an offstanding handle-arm adapted to be temporarily fastened to the logcarriage when not in use, substantially as set forth.

5. In a log-turner for sawmills, the combination. with the sawmill-carriage; of a logturning chain having a traveling support for its upper end and carrying at its lower end a cant-hook, a suitably-arranged stop to check the movement of the traveling support of the chain, and oscillatory skid-knees movably supported at one side of the ways for the log carriage beyond said stop, substantially as set forth.

0. In a log-turner for sawmills, the combination with the sawmill log-carriage; of a log-turning chain having a traveling support for its upper end and carrying at its lower end a cant-hook, a suitably-arranged stop to check the movement of the traveling support of the chain, a horizontal adjustingshaft ar ranged parallel with the movement of the logcarriage beyond said stop, and oscillatory or dropping skid-knees mounted on said shaft and provided with metal-faced rounded contact ends, substantially as set forth.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses.

DANIEL J. SALTSMAN.

Witnesses:

Tires. 1. COLE, Gno. T. PARKISON.