Bowden cable

A cable is a long wire.

It lives inside a tube. You can pull or push it. This helps move parts on a bike. It helps cars work too.

The tube is made of metal wires. It has a soft lining inside. This helps the wire slide easily. A small bolt can change the cable. This makes the cable tight or loose.

It is a very useful tool.

A Bowden cable is a flexible tool. It helps move parts by using an inner cable. This inner cable moves inside a hollow outer tube. We call this outer tube a housing.

The housing has several parts. It has a soft lining on the inside. This helps the inner cable slide easily. It also has a layer of steel wire. This layer keeps the tube from squishing. Finally, a plastic cover protects the outside.

You can use these cables to pull or push. Some use a single solid wire. Others use many small wires twisted together. This makes them very flexible.

You can also change how tight the cable is. This is done with a barrel adjuster. It is a small, hollow bolt. Turning the bolt makes the housing longer or shorter. This makes the cable tight or loose.

Ernest Monnington Bowden invented this mechanism. He was granted a patent in 1896. These cables are used in many things. They work in bicycles, motorcycles, and even planes.

A Bowden cable is a clever tool used to move parts. It works by sending mechanical force from one place to another. This happens through an inner cable that slides inside a hollow outer housing.

The housing is very strong and has a special build. It has an inner lining to help things slide. It also has a layer of steel wire to keep it from squishing. A protective outer covering keeps the whole thing safe from the world.

How does the cable actually work? The inner cable moves back and forth inside the tube. This movement can pull a part or even push it.

Some cables use a single solid wire for pushing. Other cables use many tiny wires twisted together to stay flexible. You can even adjust how tight the cable feels. A small, hollow bolt called a barrel adjuster does this job. Turning the bolt changes the length of the housing to tighten or loosen the cable.

There is a long history behind this invention. Many people thought Sir Frank Bowden invented it around 1902. However, the real inventor was an Irishman named Ernest Monnington Bowden. He lived at 35 Bedford Place in London. He was granted the first patent in 1896.

Another engineer named George Frederick Larkin also worked with these cables. He patented a flexible cable brake for cycles in 1902. Larkin later became a manager for the Bowden company.

There are many specific facts about these parts. Early cables used round steel wire for the outer tube. Modern versions often use square section wire instead. Some special housings are made of aluminum or carbon fiber. These newer materials are lighter and can make tighter curves.

The ends of the cable often have metal pieces called nipples. These nipples fit into levers or brakes to hold them in place. Some nipples are shaped like a pear, while others are cylindrical.

You can see Bowden cables working in many things you know. They are used for brakes and gear changes on bicycles. They also help control the throttle in motorcycles and cars.

Even light aircraft use them to control their engines. In the past, they were even used to operate guns on planes. This flexible design makes it easy to move parts around corners. It is a simple way to connect two different parts.

A Bowden cable is a specialized mechanical tool used to transmit force or energy. It allows a user to move a part from a distance. This is achieved by moving an inner cable inside a hollow outer housing.

Because the housing is flexible, the cable can follow curves and corners. This makes it much more useful than rigid metal rods. These cables are essential in many machines, from bicycles to automobiles. They provide a simple way to connect controls to moving parts.

The mechanism relies on the relationship between two main components. The outer housing provides a structured path for the inner element to travel. This housing is often built with a composite construction. It includes an inner lining to reduce friction as the cable slides. A middle layer, such as a helical winding of steel wire, prevents the housing from compressing. Finally, a protective outer covering shields the entire assembly from the environment.

As the inner cable moves, it can transmit a pulling force. Some specialized cables can also transmit a pushing force.

There are several different types of inner cables and housings. For push applications, the inner cable might use a special winding. This is called spring wrap or spiral wrap. These windings run in the opposite direction of the main wire. Some systems, like lawn mower throttles, use a solid inner wire for strength. However, solid wires are usually less flexible than multi-strand cables.

Housings also vary based on their intended use. Standard housings use a close-wound helix of round or square steel wire. For indexed shifting, Shimano developed a housing that does not change length when flexed. This version uses multiple strands in a long helix to maintain stability.

Other advanced housings use different materials for specific benefits. Some designs use short, hollow cylinders made of aluminum or carbon fiber. These materials are lighter than steel wire. They also allow for tighter curves and resist compression under high loads.

The ends of the cable are finished with metal pieces called nipples. These small, shaped pieces of metal anchor the cable into levers or brakes. In bicycles, these nipples might be cylindrical or pear-shaped. Some cables even feature a brass ferrule or "trumpet" to allow for free rotation.

The history of the Bowden cable is filled with debate and confusion. Many people mistakenly attribute the invention to Sir Frank Bowden. He was the owner of the Raleigh Bicycle Company around 1902. However, the actual inventor was an Irishman named Ernest Monnington Bowden. He lived at 35 Bedford Place in London. Bowden was granted the first patent in 1896.

His mechanism was originally intended for use with bicycle brakes.

Another engineer, George Frederick Larkin, played a major role in the technology. Larkin was a skilled engineer for automobiles and motorcycles. He patented a flexible cable brake for cycles in 1902. Although some claim he invented the concept, his patent was similar to Bowden's 1896 mechanism. Larkin eventually joined the Bowden Syndicate as General Works Manager in 1904. This partnership helped move the technology from simple bicycle parts to more complex machines.

The significance of the Bowden cable is seen in its wide range of applications. It is a vital part of many modern transportation systems. For example, light aircraft use push/pull Bowden cables for throttle control. In these cases, the inner element is often a solid wire.

In the automotive world, these cables are used for clutches and speedometer drives. Even historical military equipment, such as the 1918 Lewis gun, used these cables for triggers. The ability to transmit motion through a flexible path remains a fundamental requirement in engineering.