US1609471A - Cableway and carriage - Google Patents

Description

Dec. 7 1926. r 1,609,471

A. E. HANSEN CABLEWAY AND CARRIAGE I Filed March 26, 1924 2 Sheets-Sheab 1 Q v m Q W D gwwntoc Arr/20;"- if'. Hansen 1 I Quorum! V Dec. 7 ,19 26.- .-1,609,471 v A. E. HANSEN CABLEWAY AND CARRIAGE Filed March 0, 1924 2 Sheets-Sheet 2 6H0! new 5; i v I, I I I Q" APT/2U) 5.; Hansen between their ends at 41, at opposite ends of the carriage and projecting therefrom to engage each its respective stop 3. The dogs 4: are weighted so that they normally lie in a released position, but are so positioned that as the carriage reaches one of the stops 3, the shoulder 42 of the dog at this end will strike the stop 3 to raise its weighted end, whereupon the stop is engaged and held between the shoulder 42 and the normally slightly lower shoulder l3 of the dog. Means are provided for locking the dogs thereupon in this position, and in consequence the carriage is held in this position by the engagement of this dog with its stop 3, and cannot be moved until the dog is released. Preferably both dogs are connected to operate simultaneously, and thus connected form a carriage-positioning assembly, all parts of which are directly connected. Connection of the dogs may be secured by means of a link 44, pivoted at 45 below the pivot 11 of one dog and at 46 above the pivot of the other dog. Movement of the weighted end of one dog upward moves the other dog upward also, as has been indicated by dotted lines in Figure 2.

For retaining the dogs in upraised or locked position, I provide a latch 5, which is pivoted at 51 in the carriage, 1. Associated with this latch 5 is a weighted arm 52, this as shown forming a part of the latch. A. cam surface 53 on the latch 5 will engage an end of a bolt or locking bar 54, which is connected at to one of the dogs 1, to maintain this bolt 5% projecting in a position corresponding to locking position of the dogs, so long as the weighted arm 52 is in its lowered position, as shown by dotted lines in Figure 2. However, a recess or shoulder 56 interrupts the cam surface 53 and is registrable with the end of the bolt 54 when the weighted arm 52 is upraised, and when in registry therewith permits reciprocation of the bolt 54: to permit the dogs 4 to drop of their own weight into released position. The shoulder 56 is thereupon engaged by the bolt 54L to retain the weighted arm 52 in upraised position until it is desired to release it.

I have shown the hauling line 80 as guided over a sheave 11, thence through a. sheave 21 secured in the fall block 2 and thence extending to a pin 12 in the carriage, to which its end is secured, though the precise arrangement is largely immaterial. lthe portion between the sheave 11 and the pin 12 forms the hoist line 82. Between the sheave 11 and the pin 12, and immediately above the normal path of the fall block 2, the lower edge of the carriage is notched as indicated at 13, and a pin 23, projecting upwardly from the fall block 2, enters this notch 13 as the fall block is lifted. It is guided by the converging sides of the notch 13 into engagement with the weighted arm 52 when the latter is down, the pivot 51 being to one side of the notch 13, and by its upward movement raises the arm 52. The latch 5 may be formed with a hoolr 57 which, as the latch and its arm 52 are swung upward, engages beneath the pin 23 of the fall block.

Such action starts when the fall block is lowered, when one of the dogs a is engaged with its stop 3, and when the weighted arm 52 is in the position shown in dotted lines in Figure 2, that is, when the bolt 54: holds the dogs locked by reason of its engagement with the cam surface 52. As the pin 23 engages the arm 52 and raises it, movement of the latch 5 moves its cam surface over the end of the bolt 5% until at the time the pin 23 is supportingly engaged by the hook 57, the end ofthe bolt 5 1 drops engagement with the shoulder 56 under the weight of the dogs 4.- and associated mechanism as the dogs are released. At the time, however, engagement of the bolt with the shoulder 56 prevents a reverse movement of the latch 5 and maintains the hook 57 in position to support the fall block 2.

The carriage is then in condition to be moved along the trackway cable 8, the fall block being loclzed thereto. It is then traversed by means either of the hauling line I 30 or the haul-back line 81, and during movement along the sky-line 8 there is no way in which the bolt 5% may accidentally be retracted. However, upon reaching the opposite end of its run the dog a at this end of the carriage, by engagement with its stop 3, is raised, the dog at the opposite end being likewise raised, and the bolt 5 1 is retracted. This withdraws th locking means for the fall block and permits the weighted arm 52 to drop. The fall block 2 is thereupon placed in position to be lowered, and its lowering is controlled through the line 80.

1n long spans, and especially when logging down hill, even though the span be a short one, there is a tendency for the carriage to run away down hill. If the span is substantially level the carriage will tend to run toward the center. If the span is on a steep incline, the tendency is, of course, to run to the bottom of the incline. carriages, weighing hundreds of pounds unloaded, are tremendously destructive and highly dangerous if once out of control. In order, therefore, to check the carriage if possible, and to stop it once it has gotten away from control, I have provided the safety means which I will now describe.

It is evident that so long as the bolt 54 is not retracted from engagement with the recess 56, the fall block cannot be dropped, but that if the bolt is retracted the fall block is free to drop. 1 therefore provide a downward extension 17 upon one of the Such Ordinarily the safety line G'O-has'no-strainplaced upon it, and consequently there is no pull upon the arm 63 except that due to the weight of the line 60. However, if

it should be desired in an emergency'to 'release the 'fall block 2, this maybe'done by checking the paying out of line from the drum 64, by some means common in the art, as by applying '-a'brake to the drum'64i.

The result of this is to pull on the arm 63 and the trip lever 6, in opposition to the spring 61, whereupon the extension 47 is thrown to the right, as'see'n in Figure 2, and the bolt 54 is retracted. The latch 5 immediately swings over to position to release the fall block 2, and if there is no tension on the line the fall block immediately drops to the ground with its load, and acts as an efiective drag to check and stop the runaway movement of the carriage 1.

What we claim as our invention is:

1. In a cableway carriage, a pair of angularly disposed locking dogs each pivoted at it angle and positioned at opposite ends of the carriage, one arm of each projecting laterally beyond the carriage and weighted to tend to remain in lowered, released position, the other arm extending downwardly, a third arm on one of said dogs extending upwardly from its pivot, a rod directly connecting said upwardly extending arm with the downwardly extending arm of the opposite dog, a bolt movable in the carriage and connected for movement to one of said dogs, a latch and hook member pivoted in the carriage and engageable by said bolt, said latch and hook member being weighted to retain said dogs in upraised locked position when the hook is in load-releasing position, and movable to swing the hook into load-sustaining position and to release the dogs for movement by gravity into released position.

2. In a cable-way carriage, a pair of angularly disposed locking dogs each pivoted at its angle and positioned at opposite ends of the carriage, one arm of each projecting laterally beyond the carriage and weighted to tend to remain in lowered, released position, the other arm extending downwardly, a third arm on one of said dogs extending upwardly from its pivot, a rod directly connecting said upwardly extending arm with the downwardly extending arm of the opposite dog, a bolt movable in the carriage and connected directly to the lower end of one. of said dogs, a latch and hook member pivoted in theearriage and weighted'to tend to :position the hook in load-releasing position, said bolt engaging said latch unem'ber atsuch times to retain the-dogs in upraised locking position, said latch "and hook meme ber being swingable to' bring the hook into load-sustaining position, the bolt at such times being engageable therewith to retain the hook in load sustaining1position,;and be .ing :movabl'e into :such' engagement gravitational movement of the dogs into releasing position. I

e 3. Ina cableway carriage, aipair ofangularly disposed locking 1 dogs each pi-voted :at its an'gle and positioned at-opposite ends i of the carriage, one'arnrof eaclrprojecting-laterally. beyond the carriage and weighted to tend to remain in: lowered, v*rleased ipos-ition, the other arm extending downwardly, a third armonone ofsaid dogs extending upwardly from its pivot, a rod directly connecting said upwardly extending arm with the downwardly extending arm of the opposite dog, a bolt movable in the carriage and connected directly to the lower end of that dog having the upwardly extending arm, a latch and hook member pivoted in the carriage and weighted to tend to position the hook in load-releasing position, said bolt engaging said latch member at such times to retain the dogs in upraised locking position,

said latch and hook member being swingable to bring the hook into load-sustaining position, the bolt at such times being e11- gageable therewith to retain the hook in load-sustaining position, and being movable into such engagement by gravitational movement of the dogs into releasing position.

4. In a cableway system, a trackway cable, a carriage movable therealong, a stop fixed at each end of the run of said carriage, a fall block hoisting means therefor, a pair of simultaneously operable locking dogs upon the carriage each engageable with its respective one of said fixed stops, and means operatively connected to said locking dogs for retaining them in looking position until said fall blockhas been raisedto a predetermined position beneath the carriage, and for retaining said fall block in such raised position thereafter until one of said dogs is engaged with its fixed stop, a spring-held trip lever, a member in the locking system engageable thereby, when the trip lever is moved in opposition to said spring, to release said fall block, and a safety line operatively connected tosaid trip lever and extending to a distant point.

5. In a cableway carriage, a pair'of angu larly disposed locking dogs each pivoted at its angle and positioned at opposite ends of the carriage, one arm of each projecting lat- Y the other arm extending downwardly, a third arm on one of said dogs extending upwardly from its pivot, a rod directly con necting said upwardly extending arm with the downwardly extending arm of the opposite dog, a bolt movable in the carriage and connected for movement to one of said dogs, a latch and hook member pivoted in the carriage and engageable by said bolt,'said latch and hook member being weighted 'to retain said dogs in upraised locked position when the hook is in load-releasing position, and movable to swing the hook into loadsustaining position and to release the dogs "for movement by gravity into released position, a downward extension on one of said dogs, a trip lever yieldingly held in engagement with said extension, and means connecting said trip lever with a distant point for actuating said dogs and the associated mechanism to efiect release of the hook at will.

6. In a cableway carriage, a carriage positioning assembly comprising a'pair of locking dogs at opposite ends of the carriage and projecting therefrom, said dogs being pivoted and weighted to tend to remain in lowcred, released position, and a rod directly connecting said dogs for simultaneous movement, a bolt movable in the carriage and directly connected to and movable with a member of said positioning assembly, a latch and hook member pivoted in the carriage and engageable by said bolt, said latch and hook member being weighted to retain said dogs in upraised, locked position when the hook is in load-releasing position, and movable to swing the hook into load-sustaining position and to release the dogs for move ment by gravity into released position.

Signed at Seattle,

King County, Wash-- ington.

ARTHUR E. HANSEN.

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