US1012286A - Lumber-jack. - Google Patents

Description

J. n. S'TEGBMAN.

LUMBER J QK, APPLICATION FILED JUNE 20, 1910.

1,012,286. Patented Dec. 19, 1911.

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J. D. STBGEMAN.

LUMBER JACK. APPLICATION FILED JUNE 20, 1910.

Patented Dec. 19, 1911.

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v o o o o p O O O O 0 awue/wtoz \Jbfi J. 575696272)? imme/am JOHN ns'rneaM'AN, or ALA'MEDA, CALIFORNIA.

L Loni R-JACK.

Specification of Letters Patent.

Patented 1966.19, 1911 Application filed June 20, 1910. Serial No. 567,997.

To all whom it may concern:

Be it known that I, JoIIN l). S'rncnMAN,

a citizen of the United State's, residing at Alameda, in the county of Alameda and State of California, have invented certain new and useful Improvements in Lumber- Jacks, of which the following is a specification.

This invention relates to thesubject of handling loads of lumber and other material in bulk and the principal object of the same is to provide novel load' handling 'jacks for removing loads from cars and depositing the same on stands or piles or removing the loads from stands or piles and depositing the same on cars.

The improved jacks are primarily designed for fuse in connection with the load handling system that forms the subject matter of a co-pending application Serial No. 594,734 filed November 29, 1910, and which is a division of this application.

Figure is a top plan view of one of the improved jacks. Fig. 2 is a vertical longitudinal sectional view thereof taken on the .line -5, Fig. 1. .Fig. 3 is a transverse vertical sectional view taken on the line 66, Fi 2. Fig. 4 isa fragmentary vertical longitudinal sectional View taken on the line 7"7, Fig. 3. Fig. 5 is a top plan view 'of the forward truck of the improved jack.

' clipped or otherwise suitably fastened to the 'front and rear axles 7 and 8, each axle being provided with supporting wheels 9 and said wheels being preferably equipped with spaced peripheral flanges 10' which obviously prevent the jack tilting. Each axle has a sleeve 11 loosely mounted thereon one end of which is equipped with a ratchet wheel. 12 and the other end with a cam 13.

a substantially right-angular extension 21 16 depends. 'The lower ends of the arms 16 are provided with the bifurcations 17 in which the rollers 17 are mounted. The bifurcations 17 straddle the earns 13 and the rollers rest on said cams so that when said 30 which is provided with an outstan ing' pend- 5 ent. car 19 which overhangs the ratchet wheel 12 of the forward 'axle and has a pawl 20 pivotally connected thereto. The lower portion of lever 18 is provided with in which a socket 22 is formed 'for the reception of a hand lever 23. A cou lin bar 24 pivotally connects the upper en of ever 18 with a rocking lever 25 that is loose on the rear axle and equipped with a pawl similar to the lever 18 but which obviously is adapted for engagementwith the ratchet 12 of the rear axle. Thecoupling bar '24 obviously causes the levers 18 and 25 to rock simultaneously, and it will be seen that by rocking hand lever 23 a similar motion will be imparted to. said levers 18 and 25 which causes their pawls 20 to engage with and rotate the ratchet wheels 12. The cams 13 and ratchet wheels 12 being'fast in the sleeves 11 it will be clear that rotat-ionof the said ratchet wheels similarly actuates the said cams, so that arms 16 will adjust the platform 14. End plates 26 which connect the body members 6 prevent horizontal on movement of the platform 14.

Pawls 27 are provided for preventing reverse movement of the ratchet wheels 12,

said pawls being pivotally mounted on st'ub shafts 28 that project laterally from one of the body members 6. Each pawl is provided with a crank arm 29, and said. crank arms are pivotally connected by the-coupler bar 30 to cause the awls to simultaneouslyrock tin the stub shafts 28. The crank 'arm of the forward pawl is provided with a handle31 that projects through a clearance "opening 32 in the forward end plate 26. Said pawls' 27 are thrown intoengagement with ratchet wheels 12 by rocking handle 31 to lock said wheels against reverse movement when the platform 14 is elevated. Hanger brackets 33 depend from one of the body members 6, one bracket being arranged in the rear of when the levers 18 and are rocked rearward and thereby support thesaidlevers when the platform 14: is lowered.

In use two of the jacks are used in connection with each load, the jacks being mounted on separate tracks and connected by means of the load. In transporting the load, it is obvious that one of the jacks may get ahead of the other jack, and if an attempt is made to return the'jacks to alinement, the friction of the lumberwill exert a strain tending to 'overturn one of the jacks. To. prevent this, the platform'has a plate 3.4 fastened to its upper surface, said plate being provided with transverse slots adjacent the ends which register with recesses 36 formed in said platform. A movable plate 37 is seated on plate 34 and provided with pendent lugs 38 that enter said recesses and slots. Plate 37 receives the load, and it will be seen that the manner of connecting said plate with plate 34 and platform 14, permits plate 37 to have a'lateral movement relative to the ack. 4

It will be seen thatthe. improved jacks removed from carsand delivered to stands without being manually handled. And, as

'Will be understood, the piles of lumber can be readil removed from the stands by placing the acks beneath the ends of the piles and then adjusting the jacks so that the platforml will lift the piles from the stands. What. I claim as my invention is 1.. ,A-- jack comprising a body formed of spaced parallelmembers, an axle at each end of said body, a platform vertically adjustablebetween said members, a sleeve rota- .table on each axleand carrying a cam and a ratchet wheel, a rocking lever carrier by,v

' each axle, means for pivotally connecting saidlevers,,p'awls carried by said levers for engaging said ratchet wheels, means carried by said members for preventing reverse movement of said ratchet wheels, means for vertically adjustable relative to said body,

axles for said body, wheels for said axles,

sleeves loose on said axles,

cams carried by said sleeves, arms depending from said platform and having bifurcated free ends straddling said cams, and .manually operated means carried'by said axles for rotating said sleeves.

3. A jack comprising a body, axles there for, wheels for said axles, sleeves loose on said axles, cams carried by said axles, a platform adjustable relative to said body,

arms depending from said platform and.

engaging said cams, and means carried by said axles for causln-g said-cams toad uSt sald platform. I

4. A jack comprising a body, axles for.

each end thereof, said body'being formed of spaced parallel members, a platform vertically adjustable between said members,

wheels forsaid axles, sleeves loose on said axles and carrying cams, ratchets carried by said sleeves, levers loose on said axles, means carried by said levers for engaging said ratchets to rotate said sleeves, one of said levers being provided with a socket, a link connection between said levers, a handle engaging said socket, arm's carried by said platform and engagin said cams, and manually operated means or holding said ratchets against reverse movement.

In testimony in presence of two witnesses. v

' I JOHN D. STEGEMAN. Witnesses:

' v H. C. SoHRoEDnR, F. P. SCHROEDER.

.' whereof I affix my signature;

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