| Definition | a device that emits a beam that causes the target to be impelled away from the source of the beam; also the beam itself |
| OED requirements | antedating 1931 |
| Comment | Mike Christie submitted a 1941 cite from Robert Heinlein. Enoch Forrester submitted a cite from a 1965 reprint of E.E. Smith's "Triplanetary"; Derek Hepburn confirmed the cite in the original 1934 magazine appearance.
Enoch Forrester submitted a 1944 cite from George O. Smith's "Circle of Confusion" for the form "tractor-pressor beam". Jeff Prucher submitted a 1956 cite from Poul Anderson's "Margin of Profit". Cory Panshin submitted a cite from a reprint of Murray Leinster's "The Ethical Equations"; Mike Christie verified the cite in the 1945 magazine appearance. Rick Hauptmann submitted a 1931 cite from E.E. Smith's "Spacehounds of IPC". Malcolm Farmer submitted a 1960 cite from James White's "O'Mara's Orphan". Malcolm Farmer submitted a 1958 cite from James White's "Trouble With Emily". Malcolm Farmer submitted a cite for the form "presser beam" from a 2000 reprint of David Weber's 1999 "The Hard Way Home". In addition to any antedatings, we would like cites from the seventies or later from any authors not currently cited. |
| Last modified | 6 July, 2008 |
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| 1931 Amazing Stories Sept. 544/2 | We'll have them in three days, and it ought to be fairly simple to dope out the opposite of a tractor, too—a pusher or presser [sic] beam. |
| 1944 ‘W. Long’ in Astounding Sci. Fiction Mar. 49/1 | The careful positioning of the stations that held the warp of the collapsed fore element was lost as the tractor-pressor beam system took the unleashed overload current. |
| 1945 ‘M. Leinster’ in Astounding Sci. Fiction June 122/1 | By the way they're braced, there are tractor beams and pressor beams and—there are vacuum tubes that have grids but apparently work with cold cathodes. |
| 1958 J. White in New Worlds Sci. Fiction Nov. 30 | My men say the pressor beam mounts were not designed to stand this sort of thing. Insufficiently braced. The hull plating has sprung in eight places. |