US1642568A - Logging system - Google Patents

Description

v 1,642,568- Sept. 13,1927. L UYLER LOGGING SYSTEM Filed July 23, 1923 2 Sheets-Sheet 1 1,642,568 P 1927' 1.. TYLER LOGGING SYSTEM Filed July 23, 1923 2 Sheets-Sheet 2 is under a heavy strain and continuous wear Patentetl sept 13, 1927.

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r f LOGGING sYs'r'E Ap ucatioamea uly 23,1923 Serial my. 653,197; 9.

This invention relates to systems of cableways usedin transportingdogs and other which,

[forest it is most convenient to transport and collectthe logs at a single terminalpbut, in,

heavy objects and has special reference" to the invention are to providers logging system by which a largearea may be loggedeiff with the minimum of expense; to "provide means for shifting the track line of such system ma series of positions radiating from pickedup at any point in the area and 'carried to said-central'point'; and to provide a safety means wherebythe carriage is "pre- "vented from running away down the' 'grade; *ofthe track'lineif the lifting line should' breakr" I attain these and other object-sby thede vices, mechanisms, and arrangements illustrated'in the accompanying drawings,in

Fig; 1 is a perspective View showing my logging systemin operation';' Fig. 2 is a similar view of a portion thereof showing the safety device in actionyandFig. 3 is'alarger view of the carriageand its 'conn'ect-' in parts. S1m1lar numerals of-reference re er'to similar parts throughoutthe several In clearing the timber from a tract of ordinary cableway systems, it is not possible toelear a tract at any great' distance on either side of the track cable, orsky'line, so that either the outer end of the track cable has to be taken down and re-erected a great I many times or the outer fringe of the area is likely to be incompletely cleared. Further, in rough country it is quite common'to have the sky line at a considerable grade, even as much as 3000 feet tothe mile and, since the line may be from 1000 feet to 00 feetlong and the loads transported Weigh 111713040000 pounds, 'it is evident that the'liftingcable with the result that it may, at times, break.

Now, the upgrade haul cable isusually atinvented the followingdescribed apparatus 7 wherein the sky line may be shifted as much systems which transport" the logs from a wide area to a fixed point." The ob ects of dismantle it on onef e and re erect it on,

' 1,642,568 FICE,

anotherg wherein its length may be slightly ingline breaks.

adjusted; andwherein an emergency or safe-. ty device is provided which will prevent "the v {carriage from runningaway when theilift- A .z a-icentral point, whereby the logs may be Referring to the drawings, it willbe seen minal of the system, and .the logging" or j that the spar tree'l forms thereceivingter- V donkey'engine is located nearby. This en-- gine lsrepresented on the drawing by the three drums 2, 3e and 4:.which actuate respectively the lifting cable 5, the haul-in line 6 v and theout-haul line-'7 All of thesecables pass from their respective drumsthrough' suitable sheaves mountedon the central" or terminal spar tree 1; The track cable 8 is also passed througha sheave secured to the said spar tree 1'. The inner end oft-his cable 8, is'secured to a block 9 and is tightened by means of a suitable tackle 10 anchored toa;

stump '11, or other object. This inner end'is therefore adjustable and permits a. slightas well as a change in tautness. a

' The outer end of'the track cables is se-i cured to a hanging mechanism, represented diagrammatically by the plate 12, and the outer end of "the lifting line '5 is also atchange in the'working-length-of the cable 8 tached to the'same plate 12. This plate is supported by two sets of tackles 13 and 14 connecting it totwoput'er spar trees 15 and 16.- The tackle cables 17 are fastened tothe plate '12 at 18 and pass in bot-h directions therefrom through the sheaves 19 and 20 on the trees 15 and 16 respectively, and the; sheaves 21 on the plate 12,"to form both the said tackles 13 and 14:, and pass therefrom through the 'basesheaves 22 and the guide sheaves 23' to a pointnear the 'spar'tree'l. They are secured together to form one continuous cable which passes around the end pulley 24 which is anchored to a suitable stump 25, orother object, by a tackle 26. The twosides of the cable'17, near the pulley'24, are secured together by a suitable removable clamp 27. Thus it is seen that when th'e'c'able-17 is adjusted as to length and tautness and is clamped as above, the

dependent on the adjustment of the cable 17 in the tackles and 14 leading to the spar trees 15 and l6. 1 lso, it is seen that it may he quickly shifted laterally to any point between the radii leading to the said trees by simply releasing; the clamp 27 and pulling on the cable 17 on one side or the other of the pulley 52-1: thus drawing the plate 12 nearer to one or the other of: said trees. Adjustment of the tautness of said cable 17 may be made by the tackle Q6.

\Vhen the area between the radii to the two trees l5 and 16 is properly cleareih then the tackle l3 from the spar tree lo may he removed and attached to some other spar tree. such as 28., and the area between the radii leading to the trees 16 and 28 may then be similarly cleared. However, no time is lost in the use of the track cable 8 while this change is being made because the tackle 14 then supports its outer end and it lies on the radius to the tree 1b.

The load transporting system comprises the sky line 8. on which a carriage 29 rides,

a lifting line 5. haul-in line 6 and out-haul line 7. The carriage 99 is provided with a pair of track sheaves 30 which t'avel on the cable 8 and with one or more keeper sheaves 31 engaging: the under side of said cable to prevent lthe carriage from leaving the track. It also has a pair of lifting-cable sheaves 2-12, offset with relation to each other. The li'ltine' cable 5 passes beside one said sheaves 39, turns down over the other said sheaves passes around the main or block sheave 33 and up and around the first said sheave 32. Thus the said cable 5 is bent in the same direction as it engages the two sheaves 32 and the block sheave 33, thus eliminating): a large amount of the wear on said cable which would occur if it- Were bent in the usual way in opposite directions on the sheaves 3;} and 32. The load 34 is attached to the block sheave 33 by a suitable sling 35. The ends at the haul-in cable 6 and the out haul cable 7 are also attached to the block sheave 33. It will therefore be understood that the position of the carriage on the track cable 8 is controlled by the said rabies 6 and 7 and that the height of the load relatively to the carriage is controlled by the tension in the lifting cable 5.

I also provide a safety cable 36 which is attached to the haul-in cable 6 at a point somewhat removed trom the block sheave and which is threaded between the sheave 37 and its 'ianie 38. This frame 3 is mounted on or att-q bed to a convenient part of the carriage ill). The other end of the cable 36 attached to a sheave 39 which rides freely on the lifting cable I prefer to provide a weight, such as a length of chain 40, to keep the sheave 39 upright and to draw the cable Elt'l through the sheave 3'7 as the load 3% raised. This safety cable is normally without function and is arranged as described in order to he kept out of the way as much as possible and yet be always ready for the emcrgenov when it occur Now. should the cable 5 break. the oad and the block 35) would inunediatc v drop to the ground (Fig. 52) carrvhnr the ends of the cables 6 and 7 with them. The cable 5, now broken. would be pulled out i? the carriage 29 and the carriae'e would then he tree to run away down the cable R. lint. with the safety cable in place as above described. the sheave 35) is drrnipiul by the cable I? when it breaks and the lower end of the safety cable 36 also drops with the oad and the cables 6 and 7. riage starts to run it: draws the sheave 37 along the safety cable 36 until the sheave 39 or the chain ll) engages the frame 38 thereof. As neither the chain 4:0 nor the sheave 30 will. pass through the opening be tween the frame 38 and the sheave 37 it is evident that the said satcty cable 36 will hold the carriage 29 tram 't'urther movement down the grade through the drae of the.

load on the ground and the tension of the out-haul cable 7 to which it is connected through the block cable 6. l

Having described my inventimnwhat I claim is 1. In a cableway system the combination oi a central spar tree: two outer spar trees; a track cable supported at one end by the central spar tree and. iuljiustably supported at the other end by both said outer spar trees, whereby said track cable may extend in any radial direction from the central spar tree towards the space between the outer spar trees; and means tor adjusting the outer end oi the track cable whereby the and a short portion oil? the tension thereof is adjusted without altering its working length or position.

2 In a eableway system, the cou'ibination ot a central spar tree; two outer spar trees; a track cable supported at one end by said central spar tree; and. supporting cables attached to and leading from the outer end of the track cable to said two outer spar trees respectively. said cal'iles being: connected together to ['orni one continuous cable whereby loosening, one cable will lighten the other cable and move the outer end of the track cable towards said tightened cable.

3. In a cahleway system, the combination of a central spar tree: two outer spar trees; a track cable supported at one end by said central spar tree; and su iiporl inc cables attached to and leading from the outer end of the track cable to said two outer spar trees respectively, and extendingfrom the respective outer spar trees to a point adjacent the central spar tree and being connected together to term one continuous cable 'lheretore when the can track cable may be adjusted.

4. In a. cableway system the combination of a central sparjtree"; two outer spar trees; a track cable supported at one end by the central spar tree; a sheave anchored at a point adjacent said central spar tree; and adjustable means supporting the outer end of the track cable from both saidouter spar trees, whereby said track cable may extend in'any radial drection from the central spar tree towards the space between the outer spar trees, "said adjustable supporting means comprising cables leading from said outer end to said spar trees respective1y, V

said cables being connected together to form one continuous cable which extends from' both said spar trees to and around said the last named cable together on each side of Y said sheave, whereby the accidental adjustment of the supporting means is prevented. 6. A cableway system as set forth in claim 4, tog-ether with an adjustable means connecting the sheave to its anchor.

LEWVIS L. TYLER.

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