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Reconstruction of the machine that inspired Colossus unveiled

Date Posted:10/04/2019

A reconstruction of the codebreaking machine that inspired Colossus has been unveiled at The National Museum of Computing on Bletchley Park. The unveiling of the working Heath Robinson machine was performed by wartime Wren Irene Dixon in the presence of the great nephew of W Heath Robinson, the illustrator after whom the machine was named.

Courtesy of the Heath Robinson Museum in Pinner, a temporary exhibition of W Heath Robinson at War humorous illustrations was also opened and can be seen by the public six days a week during the Museum ‘s new extended open hours.

The Heath Robinson machine was an early attempt to automate codebreaking during the Second World War. It was designed to tackle the hugely complex Lorenz cipher, used by Hitler and his generals to communicate strategic messages.

The complexity of the codebreaking machine resulted in its being named in honour of W Heath Robinson the illustrator, but he would never have known of this tribute because he died long before the secrecy surrounding Bletchley Park codebreaking was lifted.

In unveiling the Heath Robinson machine and opening the Heath Robinson at War exhibition, Irene Dixon, former Colossus Wren, said, “It is such a delight to see this incredible reconstruction of the Heath Robinson machine. It is a fantastic achievement and good to meet Peter too whose great uncle made us laugh with his comical cartoons.

“Seeing all this brings back many memories of my arrival at Bletchley Park in late 1943 to work on the new Colossus machine. I was able to see Wrens working on the original Heath Robinson. It produced good results, but the tapes broke so often that it was a major job to repair them. That was a tedious full-time glue job for somebody! In later years I was able to reassure a former Wren that she had been doing valuable war work!” 

Peter Higginson, art historian and great nephew of William Heath Robinson, said, “If William Heath Robinson had known about the codebreaking machine named in his honour, it would have extended his career infinitesimally. He was deeply aware of modernity and brought out the humour in it to give it humanity.

“Undoubtedly the 1940s team who named the codebreaking machine were deeply serious and committed but they identified with this humorous approach to technology rather than characterising it as a robotic device devoid of humanity.” 

After the unveiling, reconstruction team members Phil Hayes and John Pether set the reconstructed Heath Robinson running once again, more than seven decades after the original first helped break Lorenz ciphers. TNMOC volunteer Helen Jarvis re-enacted the wartime Wren’s task of reading the results from a dashboard.

Paying tribute to the team of volunteer engineers who reconstructed the Heath Robinson, Andrew Herbert, chair of TNMOC, said, “After seven years of skilled work by TNMOC volunteers, the public can see a Heath Robinson working – for the first time! It is an incredible achievement, adding yet more life to the story of Lorenz codebreaking at The National Museum of Computing. Visitors can now see the original German cipher machines alongside working reconstructions of the whole of the deciphering process from intercept to decrypt.”

Like the historic machines throughout the Museum, the Heath Robinson original illustrations are protected by the newly installed Paessler AG PRTG environmental monitoring system.

Photo: Irene Dixon with the Heath Robinson reconstruction. Photo: Andy Taylor

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