US1048388A - Log-unloader. - Google Patents

Description

J. W. BRAOKBN.

LOG UNLOADBR. APPLIGA'L'ION FILED MAR.22,1912,

Patented Dec. 24, 1912.l

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LOG UNLOADER. 'Ammom'lon FILED 111112422. 1912 Patented Deo. 24, 1912.

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, JOHN WJ BRACKEN, OF PRINCETON, FLORIJA.

LOG-UNLOADER.

To all nahe/a it muy concern:`

lie it known that. l, Jona TN. Baiona-N, a citizen oi" the United' States, residing at lvrinceton, in the county oft' Dade and State of Florida, have inventcdhew and useful Improvements in img-llnloaders, of which the 'following is a specitication.

'l'his invention is an improved log unloader t'or use at saw mills and in other places. toi' the purpose ot' moving logs, my .invention relating particularly to that class ot log' nnloa'lers in which carriers, provided with dogs or Ion' engaging devices are moved back and t'crth upon skids by means ot' endless cables connected tol the carriers and operating mechanism For theendless cables, the invention consisting in the construction, combination and arrangement of devices hereinafter described and claimed. l

One obicct omy invention is to effect improvenn-nts in the construction ot the carricrs which carry the dogs or log engaging devices.

Another object o't" the invention is to eti'ect improvements in the construction oi the, dogs or log engaging devices.

Tn the accompanyingl drawings:Mlfgnre 1 is a plan of a' log unloader constructed in accordance with my invention. Fig. 2. is a side elevation ot the same. Fig. 8 is a longitudinal sectional view et the same on the plane indicated 'oy the line o-o of Fig. 1. Fig. Li. is a vertical transverse sectional view of the same on the plane indicated by the line 7)-b ot Fig. 2.

The skids ot' my improved log nnloader are indicated at' '1. These `skids are provided with skidways i. The skids are supported by blocks or posts il and under the ends et the skids are sheaves i, they axles 5 of which have their 'bearings G secured on the outer sides of the end 'iostsor blocks. 'lhe usual endless cables 7, which operate below the skids are engaged with the sheaves and the. lower leads ot' the endless cables are partly coiled on operatingdrums S, the said drums being fixed on a shaft 0 which is-mounted in bearings 10 and is provided at one end with a large spur gear 11. This spur gear is engaged by a pinion 12 on a reversible engineshaft 13, and, hence., when the engine shaft is driven in one direction or the other the gears and drums hereinbetore described cause the endless cables to move longitudinally along the skids according lo the direction in which the engine shaft is driven.

Specification of Letters Patent.

Application filed March 22, 1912.

Serial No. 685,410.

ln accordance with my invention, I provide carriers 14 which are arranged to move longitudinally in the skidways and each of which is provided on its under side with an anchor 15 whereby itis connected to the upratenta Dec. 24,1912.

per lead of one of the endless cables. Each :arrier -is provided with longitudinal vertical recesses 1G for the reception of dogs or log engaging devices` 17, cach of which is pivotally mounted at one end in one of the said recesses upon a pivot pin or other like device 18 which extends transversely through thecarrier. Hence, one end of each dog may be raised and lowered. In connection with each dog, I employ a spring 19 for raising the same to an inclined `position so that its free end may project above the upper side of the carrier and to limit the upward movement of the clogs or log engaging devices, I provide chains 2O each chain having one end secured to one of the dogs or log engaging devices, as at 21 and the other end secured as at 22 in one of the recesses of the carrier. lt willbe understood that tho carriers are operated back and forth in the skidways by means ot' the endless cables and their connections hereinbefore described. lVhen the carriers are moved in the opposite direction to that indicated by -the arrow in Fig. 1. their dogs slide under the logs on the skids and when the carriers are moved in the direction indicated by the arrow in. Fig. l their dogs, by engagement witli the logs move the latter in that direction over the skids, as will be understood.

lnl'urther accordance with my invention, I provide each carrier at the vFrontend thereot with a lifting member 29 which is pivotally connected thereto as at 23, the pivotal axis being horiaontal so that each lifting member may he raised or lowered atits front end. lach lifting member is provided with a dog or lop' engaging device 2t identical in const ruction with the dogs or log engaging devices 17 hereinbefore described, pivotally mounted as at Q5, normally raised by a spring 2G and controlled in vertical movement by a chain 27. 'At each rearward movement of the carriers the dogs or log engaging devices 24 of the lifting members ol the carriers pass freely under the logs. At

-the forward movements of the carriers the 01E/hinged A'axles another layer of logs will be deposited on the lower layer by reason of the fact that the lifting,` members are raised et the c011- clusion of their forward strokes by the lower loyer of logs, turn upwardly on their pivots 23 and, hence, cause theii` dogs or log` eng/seing members 24 to elevate the-logs carried/5y the lifting members and cause them to( e deposited on the'V lower layer of logs, M Y,

lVhile I have hereinshown and described e preferred form of my invention, I would havel it understood that changes may be made in the form, proportion and construction of the`\several from the spirit of in the scope of t-le my invention and Wit-happended claim.

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to actuate the carriers,

parts Without depart-ing I claim z* In a log unloader of the class described, in combination with skids, carriers movable and forth on the skids and having projected log engaging dogs, means and lifting members pivotally connected t-o the front ends of the carriers' andthereby arranged for vertical movement at their free ends, the saidl lifting members being also provided with spring projected log engaging devices. -In testimony whereof I affix my signature in presence of two Witnesses.

JOHN W. BRACKEN.

spring Witnesses J Kl DoRN, CAR A G. HAI

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