The Jacquard loom ties together two of Manchester's most important historic industries: textile manufacturing and computing. Read on to find out how it both revolutionised the production of patterned cloth and also inspired the development of early computing.
A revolutionary invention
When Joseph-Marie Jacquard, a French weaver and merchant, patented his invention in 1804, he revolutionised how patterned cloth could be woven. His Jacquard machine, which built on earlier developments by inventor Jacques de Vaucanson, made it possible for complex and detailed patterns to be manufactured by unskilled workers in a fraction of the time it took a master weaver and his assistant working manually.
The spread of Jacquard's invention caused the cost of fashionable, highly sought-after patterned cloth to plummet. It could now be mass produced, becoming affordable to a wide market of consumers, not only the wealthiest in society.
Punch cards weaving patterns
To weave fabric on a loom, a thread (called the weft) is passed over and under a set of threads (called the warp). It is this interlacing of threads at right angles to each other that forms cloth. The particular order in which the weft passes over and under the warp threads determines the pattern that is woven into the fabric.
Before the Jacquard system, a weaver's assistant (known as a draw boy) had to sit atop a loom and manually raise and lower its warp threads to create patterned cloth. This was a slow and laborious process.
The key to the success of Jacquard's invention was its use of interchangeable cards, upon which small holes were punched, which held instructions for weaving a pattern. This innovation effectively took over the time-consuming job of the draw boy.
When fed into the Jacquard mechanism (fitted to the top of the loom), the cards controlled which warp threads should be raised to allow the weft thread to pass under them. With these punch cards, Jacquard looms could quickly reproduce any pattern a designer could think up, and replicate it again and again.
Step by step: how a Jacquard loom works
First, a designer paints their pattern onto squared paper. A card maker then translates the pattern row by row onto punch cards. For each square on the paper that has not been painted in, the card maker punches a hole in the card. For each painted square, no hole is punched.
The cards, each with their own combination of punched holes corresponding to the part of the pattern they represent, are then laced together, ready to be fed one by one through the Jacquard mechanism fitted at the top of the loom.
When a card is pushed towards a matrix of pins in the Jacquard mechanism, the pins pass through the punched holes, and hooks are activated to raise their warp threads. Where there are no holes the pins press against the card, stopping the corresponding hooks from raising their threads.
A shuttle then travels across the loom, carrying the weft thread under the warp threads that have been raised and over those that have not. This repeating process causes the loom to produce the patterned cloth that the punch cards have instructed it to create.
From 7,000 to 8,000 Jacquard looms are now in this country... The best English designs are those in cotton goods… The Jacquard machinery is applicable to everything which is figured or flowered… every species of tissue (woven fabric) to which a loom can be applied, even to straw hats, horsehair or wire…
Manchester Guardian (14 December 1836)
Manchester engineering companies also began manufacturing Jacquard machinery to supply to the region's textile mills. Devoge and Co. was established in 1834 and continued producing Jacquard mechanisms until the 1980s.
Inspiring early computing
Jacquard's invention transformed patterned cloth production, but it also represented a revolution in human-machine interaction in its use of binary code—either punched hole or no punched hole—to instruct a machine (the loom) to carry out an automated process (weaving).
The Jacquard loom is often considered a predecessor to modern computing because its interchangeable punch cards inspired the design of early computers.
The Analytical Engine weaves algebraic patterns, just as the Jacquard loom weaves flowers and leaves.
Ada Lovelace, mathematician (1843)
With his Analytical Engine, Babbage envisaged a machine that could receive instructions from punch cards to carry out mathematical calculations. His idea was that the punch cards would feed numbers, and instructions about what to do with those numbers, into the machine.
Ada Lovelace took Babbage's idea a step further, proposing that the numbers the engine manipulated could represent not just quantities, but any data. She saw the potential for computers to be used beyond mathematical calculation and proposed the idea of what we now know as computer programming.
Unfortunately, the Analytical Engine was never completed, and it was 100 years before Babbage's and Lovelace's predictions were realised.
However, their work, and the inspiration provided by Jacquard's revolutionary weaving machine, came to underpin the technological development of the modern computer.
Read more about the history of computing
Lovelace, Turing and the invention of computers
It's hard to imagine a world without computers. It seems as if they can do anything—that they can be programmed with any problem we can imagine. But how did we get to this?
Suggestions for further research
- Elliot, Francesca, Weaving numbers, Science and Industry Museum blog, 17 October 2017
- Platt, Katherine, Ada Lovelace: Visionary of the computer age, Science Museum blog, 13 October 2015
- How was it made? Jacquard weaving, Victoria and Albert Museum YouTube channel, 8 October 2015
- Messrs. Barlow & Jones Ltd., Manchester and Bolton, The North West Film Archive on the BFI
- Textiles on Film, BFI
- Thinking machines: Stories from the history of computing, Science Museum website, 7 January 2019