Comment Try 1966 (Score 1) 557
Heinlein's The Moon is a Harsh Mistress had them back in 1966. I believe they were called "ballistic tubes," and had all the properties mentioned in the patent.
Of course, Heinlein's tubes also travelled at orbital velocity so as to reduce friction and/or power to the maglev coils. This feat would obviously be much harder to replicate on the earth.
http://www.wegrokit.com/miahm.htm
Can anyone beat 1966 for prior art?
Of course, Heinlein's tubes also travelled at orbital velocity so as to reduce friction and/or power to the maglev coils. This feat would obviously be much harder to replicate on the earth.
http://www.wegrokit.com/miahm.htm
Can anyone beat 1966 for prior art?
