Rossi’s Wire Cutting Shell
In the spring of 1916, Marcianus F. Rossi, then a resident of San Jose, California, patented an interesting projectile designed to cut barbed wire. Rossi’s application was filed on 7th April, 1916 and granted a year later on the 10th April, 1917.
Rossi explained his concept in his patent specification:
“This invention relates to a projectile for ordnance purposes and has for its object to provide a hollow projectile in which is mounted a movable device that includes a plurality of cutters adapted to be forced out of a projectile after the latter has been dis charged from the gun and which serve the purpose of cutting through and destroying wire entanglements that are erected at the present time in advance of an attacking army to prevent surprises and sudden attack by the enemy.”
The hollow projectile had a spring and plunge inside which when tripped forced our a pair of blades which, in theory, would cut any wire it came into contact with.
The wire-cutting blades remained inside the shell until it was fired and would then deploy in flight through openings in the projectile body. Rossi wanted the projectile to spin in flight like a conventional shell and once the blades deployed he envisaged “both forward movement... and a rotary movement...” which he believed would cut through “all wire entanglements that intervene in its path for a very great distance.” This would suggest that he intended the rounds to be fired directly rather than plunging indirectly as most artillery was used by this point of World War One.
Rossi believed that “when a sufficient number of such projectiles have been discharged these entanglements are practically rendered useless.” A very optimistic hope, considering the round was more likely to churn up and entangle even more any wire it came into contact with. Even more optimistically Rossi thought that his “projectile may be used for the destruction of aeroplanes, buildings and other objects.”
Rossi’s projectile is a perfect example of an inventor with little practical experience of a military problem he is attempting to overcome. Wire posed an enormous problem during World War One, however, Rossi’s answer to the challenge would probably have been impractical.
Rossi, born in Italy in 1870, went on to publish an early science fiction story - A Trip To Mars, published in 1920. His patent and literary work are a testament to his imagination. He died in 1948, aged 78.
‘Projectile’, US Patent #1,222,142, M.F. Rossi, 10 Apr. 1917, (source)
M.F. Rossi, SF Encyclopedia, (source)