# US 4,012,001 A · Cable spinning

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- Number: US 4,012,001 A
- Document ID: US4012001A
- Status: Granted
- Kind: A
- Application number: 05/547,404
- Filed: 1975-02-05
- Granted: 1977-03-15
- Earliest claimed: 1972-08-04
- Inventors: Hugh Stewart Geddes Knox
- Web page: https://patentgrep.com/patent/US4012001A

## CPC

- E01D 19/16: Suspension cables; Cable clamps for suspension cables {; Pre- or post-stressed cables}
- B66D 1/26: having several drums or barrels
- B66D 1/36: Guiding, or otherwise ensuring winding in an orderly manner, of ropes, cables, or chains
- B66D 2700/0166: Winches with multiple drums or with drums with multiple parts of different diameter
- B66D 2700/0191: Cable guiding during winding or paying out
- E01D: CONSTRUCTION OF BRIDGES, {ELEVATED ROADWAYS} OR VIADUCTS; ASSEMBLY OF BRIDGES (bridges extending between terminal buildings and aircraft for embarking or disembarking passengers B64F1/305; {tracks for special kinds of railways E01B25/00; culverts E01F5/005})
- B66D: CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS (winding or unwinding ropes or cables for feeding or storage purposes B65H; rope or cable winding or unwinding mechanisms for lifts B66B)

## Abstract

The invention is a machine for reeling and unreeling wire for use in the aerial spinning process for forming suspension cables in the construction of a suspension bridge, which machine comprises a frame including two substantially horizontal support means, two permanently mounted reels for reeling and unreeling the said wire, each reel being mounted on one of the said horizontal support means and capable of rotation about the horizontal support means in either direction and variable speed drive means for each reel including a positive driving connection to each reel for driving the reel in either direction.

## Claims

### Claim 1

A machine for reeling and unreeling wire for use in an aerial spinning process for forming suspension cables in the construction of a suspension bridge, comprising in combination, a frame including a nonrotatable shaft, two permanently mounted reels for reeling and unreeling said wire, each reel being mounted on said nonrotatable shaft and rotatable about said shaft in either direction, and separate, independent and reversible variable speed drive means for each reel including a positive driving connection to each reel for driving each reel in either direction of rotation independently of each other.

### Claim 2 (depends on 1)

A machine as claimed in claim 1 wherein each variable speed drive means is a pneumatic motor.

### Claim 3 (depends on 2)

A machine as claimed in claim 2 wherein each variable speed drive means includes a brake becoming automatically operative when the pneumatic motor ceases to drive its respective reel.

### Claim 4 (depends on 1)

A machine as claimed in claim 1 wherein each reel has a diameter of at least 11/2 meters.

### Claim 5 (depends on 1)

A machine as claimed in claim 1 wherein each reel carries at least 2 tons when fully wound.

### Claim 6 (depends on 1)

A machine as claimed in claim 1 wherein the reeling and unreeling wire speed is attainable at 700 meters per minute.

### Claim 7 (depends on 2)

At least two machines as claimed in claim 2 with pneumatic motors operatively connected to a common air compressor and air reservoir.

### Claim 8 (depends on 1)

A machine as claimed in claim 1 wherein each reel has a width less than 850 millimeters and the width across the two reels of the machine is less than 2 meters.