![]() ![]() They accomplished this by having to make them much larger and heavier with only a semi round design. It took several years for the other safe makers to figure out ways of designing round safes to get around Marvins original patent design. Because of their round design patent, they were the only safe maker that was able to manufacture this super high security round design safe. The large size stood 34"H and weighed 2,000 lbs. ![]() The middle size stood 27"H and weighed 1300 lbs. The smallest size stood 20"H and weighed 650 lbs. The safe was made basically in three sizes. The spherical shape gave it the immense resisting strength of the double arch the strongest possible shape making it secure against the heaviest sledge hammers, distroying the sledge hammers, but not damaging the safe. The safe itself was made of "Chrome Iron" which was impervious to acids and drill bits and was the hardest material yet discovered at that time. That nickname has stuck, and is still in use even today when talking about round design safes. Remember that 1863 was right in the middle of the Civil War, where there were plenty of canonballs being utilized by both sides. It got its nickname of "canonball" from its round design, which looked visually similar to a military canonball. ![]() Marvin Safe Company was the first company to create, patent, and produce a round design safe in 1863. Chrome Iron Spherical Mini-Canonball Safe.
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