US1393604A

US1393604A - Slack-puller for cableways

Info

Publication number: US1393604A
Application number: US431992A
Authority: US
Inventors: Berger Knute
Original assignee: WASHINGTON IRON WORKS
Current assignee: WASHINGTON IRON WORKS
Priority date: 1920-12-20
Filing date: 1920-12-20
Publication date: 1921-10-11
Anticipated expiration: 1938-10-11

Description

K. BERGER.

'- SLACK PULLER FOR CABLEWAYS.

APPLICATION FILED DEC. 20, 1920. I

1,393,604. A Patented Oct. 11, 1921.

UNITED STATES KNUTE BERGER, or SEATTLE,

PATENT OFFICE.

.A CORPORATION WASHINGTON.

SLACK-FULLER FOR CABLEWAYS.

Specification of Letters Patent.

Patented Oct. 11', 1921.

Application filed December 20, 1920. Serial No. 431,992.

To all whom it may concern:

Be it known that I, KNUTE BERGER, a citizen of the United States of America, and resident of the city of Seattle, in the county of King and State of Washington,

have invented certain new and useful Improvements in Slack-Pullers for Cableways, of which the following is a specification.

My invention relates to slack pulling devices for use on cableways.

The object of my invention is to provide a device for pulling out the slack of a hoist or fall rope so as to insure the ready lowering of such a rope from the carriage or sheave over which it passes.

The particular parts and combinations of parts of which my invention consists and upon which I desire to secure a patent will be hereinafter described and then particularly pointed out in the claims.

Figure 1 shows diagrammatically a cableway upon which my invention has been placed.

Fig. 2 is a detail showing the swivel connection at each end of the block which is employed in carrying out my invention.

In the drawings 1 represents an overhead trackway, as, for instance, a cable which is stretched between a head tree 10 and a tail tree 11. This trackway may, of course, be of any other suitable construction. Mounted upon this trackway so as to travel therealong is a carriage 2. This carriage may in many respects be of any suitable and desired construction.

Carried by this carriage, either directly in the frame thereof or, as herein shown, in a separate frame 30 which is pivotally supported from the carriage,is a sheave 3 over which passes the outer end of a hoist or fall rope 4. This fall rope extends either directly or indirectly through a connecting rope, as 40, to a head tree and to an engine or other means for operating the same.

I have shown a sheave, as 41, mounted upon a head tree, over which this rope passes. As herein shown and as I prefer to mount the same in my invention, the two parts of this rope, as 4 and 40, are connected through a'block as 5, by means of swivel connections which are shown in detail in Fig. 2 and which include eyes 50 which are rotatably mounted in each end of the frame of the block. A haul back line 6 is secured to the carriage and passes through a distant sheave, as 60, carried by the through other sheave or sheaves 61, which preferably are mounted at some point laterally removed from the oableway so that the return run of this rope cannot become entangled with the carriage or the other ropes thereof.

A slack pulling rope, as 7, has one end thereof secured to the frame 30 of the sheave 3, or in some other way to the carriage. This rope passes through the block 5 and thence back to the tail tree 11. Preferably this will pass through the carriage or over the sheave as 7 0 carried by the carriage and from the tail tree pass back to the operating drum, through sheaves, as 71, which are supported at points laterally removed from the line of the cableway.

By theabove method of connecting the slack pulling rope to the haul or hoist rope, the slack pulling rope may be made quite small, as it has a double purchase by use of the block 5. In consequence the slack due to a very long span, or to the use of a tall tree and thence heavy rope, may be more easily taken up. 1

In addition the hoist or haul rope 40 may be drawn more tightly and consequently the fall, or the outer portion 4 of the hoist rope, may be extended farther than would otherwise occur.

What I claim as my invention is:

1. The combination with a sheave carried by a cableway carriage, a hoist rope passing over said sheave, a block carried by the hoist rope between the carriage and the head end of the cableway, and a: slack pulling rope extending from the carriage through said block and back with its end secured at the carriage.

2. The combination wlth a sheave carrled by a cableway carnage, a hoist rope passing over said sheave, a block having swivel connections by each end with the hoist rope to form a link therein and located between the carriage and the head end of the cableway, and a slack pulling line extending from the carriage through said block and back and having an end secured at the carriage. v

V 3. In a cableway, in combination, a track- Way cable, a carriage thereon, a hoist line,

a sheave carried by the carriage and over "which the hoist line passes, a block having swiveling eyes at each end, the hoist rope being divided into two sections which are connected, each to its respective swiveled 10 eye of the block, and a slack pulling line passing from the carriage through said block and back to a securer'nent to'the carriage.

Signed at Seattle, King county, l/Vash- 15 i'ngton this 15 day o'fDecember 1 920. V

KNUTE BERGER.