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Writer's pictureJay Curtis

Dr. Death Ray: Harry Grindell Matthews - The Full Story

Updated: Aug 7


In the heart of Swansea, nestled amidst the serene landscapes, lies a tale as electrifying as the currents that once coursed through Harry Grindell Matthews' laboratory on Tor Clawdd. Step into the world of innovation and intrigue, where science fiction meets reality, and where Dr. Death Ray, as Matthews was ominously dubbed, carved his indelible mark in history.


The Bungalow at Tor Clawdd today

Unraveling the Enigma


2024 marks 100 years since Harry Grindell Matthews demonstrated his so-called 'death ray' at the War Office. But who is he? The maverick inventor born in 1880, possessed a mind teeming with ideas that transcended the boundaries of conventional thought. However, his journey into the realm of invention was marked by controversy, fascination, and a relentless pursuit of the extraordinary.


Born in Winterbourne, Gloucestershire and with limited formal education, Matthews possessed an innate genius that propelled him into the realm of invention. His early career saw him working as an electrical engineer and inventor, with a particular focus on wireless communication technology and in 1902, he patented an improved version of the wireless telegraph.


To keep all this work secret, Matthews' soon relocated to a hidden laboratory on Tor Clawdd in Clydach, near Swansea where his visionary concepts were ignited into reality. Here, amidst the lush Welsh countryside, he conducted experiments that pushed the boundaries of scientific understanding and it was here that the legend of Dr. Death Ray was born.


His journey into the realm of invention was characterized by a series of groundbreaking achievements and controversies. In 1915, he claimed to have invented a device capable of detecting submarines using sound waves, a technology that would later become known as sonar. Although his invention was initially met with skepticism, it ultimately gained recognition for its practical applications in maritime warfare.


However, it was Matthews' purported invention of the "Death Ray" that catapulted him into the realm of international fame and notoriety. In the 1920s, amidst growing tensions in Europe, he claimed to have developed a device capable of emitting a concentrated beam of energy capable of destroying German enemy aircraft and warships. Despite the sensationalism surrounding the "Death Ray," Matthews' claims were once again met with skepticism from the scientific community, and the true nature of his invention remained a subject of much speculation.


Perched on Tor Clawdd, his secretive enclave served as the epicentre of his innovative pursuits and enigmatic experiments. Among his famed visitors was reported to be none other than Winston Churchill, who was intrigued by Matthews' purported inventions during the War. Its suggested by some that he sought his expertise in devising countermeasures against German U-boats and within the walls of this secluded laboratory, Matthews' collaboration with Churchill might just have marked a pivotal moment in history, where the convergence of science and statesmanship shaped the course of warfare and technological advancement.


Matthews tests his 'Sky Projector' which is believed to have inspired Batman because it resembles the 'bat signal'

The Myth and the Reality


Throughout his career, Matthews continued to push the boundaries of scientific understanding, exploring diverse fields ranging from aviation technology to remote control systems, all whilst living high above South Wales. Despite facing financial challenges and controversy, he remained steadfast in his pursuit of innovation, driven by a relentless passion for discovery.


Despite Matthews' journey being fraught with challenges and setbacks, his resilience never wavered. Facing strong opposition from critics, the scientific community and encountering financial obstacles, he continued in his unyielding belief that the potential of his inventions could change the world.


To this day, Harry Grindell Matthews is credited with several significant inventions and innovations, these include:


  1. Aerophone device, a radiotelephone that transmitted messages between a ground station and an aeroplane from a distance of 2 miles. He also demonstrated his wireless before King George V at Buckingham Palace, where he established communication between two cars in motion. Some claim this was the early prototype to the mobile phone.

  2. Aerial torpedo: He invented a remote-controlled aerial torpedo, a precursor to today's guided missiles and the British government awarded him £25,000 to create a weapon against zeppelins or remotely control unmanned vehicles.

  3. Airplane autopilot: Matthews created one of the earliest versions of an autopilot system for aircraft, contributing to advancements in aviation safety and navigation.

  4. Talking Pictures: 1921 and claimed to have invented the world's device and subsequently recorded a farewell interview of Ernest Shackleton before he famously went on to climb Everest.

  5. Death Ray: Matthews claimed to have developed an electric ray that would put magnetos out of action with enough power to shoot down aeroplanes, explode gunpowder, stop ships and incapacitate infantry from the distance of 4 miles.

  6. Sky Projector: This is widely believed to have been the inspiration for the 'bat signal' in the Hollywood movies.


Among other inventions attributed to Harry were: Submarine Detection, Aerial Defence Systems, Automatic Street Lamps that came on at dusk, a liquid hydrogen powered rocket-plane, and the ‘Luminaphone’, an organ that was played by means of light beams.


The death ray in action | The Bioscope | 24 July 1924

The Legacy Lives On


The circumstances surrounding Harry Grindell Matthews' death remain somewhat mysterious to this day. He passed away on September 11, 1941, at the age of 61 and the exact cause of his death is not definitively known. There are various speculations and theories surrounding it. Some sources suggest that he died of a heart attack, while others propose that he succumbed to complications related to diabetes. However, due to the lack of conclusive evidence, the exact circumstances of Matthews' death remain open to interpretation, adding another layer of intrigue to his already enigmatic legacy.


While the "Death Ray" may have captured headlines, Matthews' contributions to science extend far beyond sensationalism. His pioneering work in wireless communication, aviation technology, and remote control laid the groundwork for future innovations, shaping the course of history in ways that continue to resonate today.


In the annals of history, Harry Grindell Matthews stands as a testament to the power of imagination and the boundless potential of human ingenuity. His laboratory on Tor Clawdd serves as a monument to his legacy, a reminder of the remarkable feats achieved by those who dare to dream.


Harry Grindell Matthews: Lauded as 'Death Ray Matthews' in the press in the 1920s
How Matthews's lab at Tor Clawdd on Mynydd y Gwair used to look

Final Thoughts: A Journey into the Unknown


As I reflect on the life and legacy of Harry Grindell Matthews, I am reminded that the pursuit of knowledge knows no bounds. In the hallowed hall of his laboratory, amidst the whispers of the past, we find inspiration to push the limits of what is possible, to chart a course into the unknown, and to leave an indelible mark on the tapestry of human history.


So, let us raise our eyes to the skies over Clydach, where the echoes of Matthews' brilliance still linger, and let us forge ahead into a future illuminated by the light of innovation and imagination which all stemmed from the Swansea Valley.


Watch the full Vlog on the story of Harry Grindell Matthews here:




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