There were justifiable fears of being buried alive, before modern medicine could safely identify the difference between certain types of paralysis or coma and being dead. Fears which were exacerbated by fiction such as The Premature Burial by Edgar Allan Poe. As a result a bizarre range of contraptions were invented to signal having been buried alive, from bells, whistles and even a spring loaded ejector coffin which might actually kill other people from the shock of seeing an interred body spring out of the ground in a cemetery.Added to this were ranges of hermetically sealed iron coffins and a device to prevent grave robbing consisting of a booby-trap subterranean torpedo.For more of these, check out: http://deathreferencedesk.org/2010/02/02/premature-burial-device-patents/
We tend to think of submarines as being a particularly 20th century object when we imagine the nuclear powered, nuclear missile carrying versions. Obviously however, they feature in the Jules Verne classic, ‘20 Thousand Leagues Under the Sea' and are, as such a definitive Victorian piece of technology, or to use the term currently in vogue, 'steampunk'.Although the idea of a submarine began as early as the 16th century, it was in the Victorian era that the modern cigar with periscope form was developed with France's Gymnote in 1889.Included here is a picture of the model of the Plongeur which was exhibited at the Exposition Universelle in 1867. This was the actual item that Jules Verne saw and inspired the Nautilus in his seminal science fiction work, making it an historic item in the cultural history of technology.