Behe simply did not do his homework and check patents before making claims about mousetraps (Behe 1996, p. 39-42). Behe observed that a mousetrap does not work if any of its parts is lacking and therefore cannot have had a precursor made up of one part less.
|Figure from US patent 528,671 by William C. Hooker|
We are interested in the wire part that starts at #3, coils (#4), then runs into the striker (#2 and #8), runs through the coil, and ends at #5 behind the striker. Numbers 6 are fixtures. #14 with the strange exponent is the fixture for the holding bar (#9). Numbers 10, 11, 14, and 15 all belong to the catch with a notch for the bait.
Behe (1996, p. 43) depicted the following mouse trap and observed:
|Figure 2-2 from Behe (1996, p. 43)|
Apart from usage (striker vs. hammer), these are the same trap functions carried by five parts. You can clearly see that spring and striker (hammer) are made of two parts, where Hooker (1894) used only one wire.
In Hooker's seminal patent spring and striker were made of one wire - two functions carried by one part!
That patent is 'ancestral' to all current flat snap traps. The reason for this is the huge commercial success it had. And the reasons for this in turn are probably threefold. It was small and, as the name 'Out O' Sight' suggests, could be placed where visitors and neighbors wouldn't see it. Hence consumers preferred (selected) it over the more monstrous alternatives of the time. It was cheap to produce in masses and good to package and ship, hence producers and traders preferred (selected) it. The flat surface, as you can see below, could be used for advertisement. This spandrel could be a reason why vendors preferred (selected) it.
Anyway, the direct precursor of Behe's mouse trap had one part less (!), was working perfectly (!), and was such a big commercial success that we today have a very large diversity of modifications of it - though most people don't notice the fine differences!
The reason why spring and striker were later made of separate wire parts are probably several. Firstly, it was easier for mass production and assembly. Secondly, the striker can be made of a harder alloy, the spring of a more flexible one if separate. The separation of spring and striker, however, was not patent-worthy because other traps (not flat) with separate spring and striker already existed in Hooker's days.
|Vintage specimen of the real 'Out O' Sight.'|
Hooker's patent is worth another footnote, because of thorough confusion of priorities. Here's what I wrote about it in a recent article in the journal Evolution: Education and Outreach.
“William Chauncey Hooker (1894) patented a flat snap trap: “for catching mice and rats, a simple, inexpensive and efficient trap adapted not to excite the suspicion of an animal, and capable of being arranged close to a rat-hole” (quoted from the patent description). It allowed for mass production and went through many modifications (Drummond et al. 2002).
A safe to set modification of Hooker’s design was invented by John Mast (filed 1899, patented 1903): “The object of the invention is to provide means whereby traps of this class [flat snap traps] may be readily set or adjusted with absolute safety to the person attending thereto, avoiding the liability of having his fingers caught or injured by the striker when it is prematurely or accidentally freed or released” (also quoted from the patent description). The fact that Hooker sold his Animal Trap Company of Abingdon, IL, and it merged with the J. M. Mast Manufacturing Company of Lititz, PA, in 1905 (Drummond et al. 2002) may have contributed to a false attribution of priority to Mast (Hope 1996). Unfortunately, the misbelief in Mast’s priority is transmitted (e.g., Shanks and Joplin 2000).
Others falsely credit priority to James Henry Atkinson of Leeds, UK (e.g., Bellis 2009). His ‘Little Nipper’ received GB patent no. 27,488 in 1899 and has a treadle cut out of the whole width of the base. This increases the likelihood that the trap is sprung when a mouse only passes over it without being attracted to the bait. Another urban legend has Hiram Maxim, inventor of the machine gun, as inventor of the first, flat, snap mouse trap (‘Mousetrap’ by Wikipedia contributors, before I fixed it at January 6, 2010). In his memoirs, however, Maxim (1915) described his inventions as automatic cage traps. The resetting automatism of one was powered by a coiled spring made from the hoop of a skirt, that of the other was powered by the entering mice themselves.” (Dagg 2011)
P.S.: This mole trap is from a patent of Hooker (1879). All trap functions are carried by only two wire parts and the trap is reminiscent of John H. McDonald's suggestion for a reduction of complexity of mousetraps.
|Figure from US patent 218,532 by William C. Hooker (1879).|
- Behe M (1996) Darwin's black box. Free Press, New York.
- Bellis M. History of the mousetrap. http://inventors.about.com/od/mstartinventions/a/mousetrap.htm. Accessed December 6, 2010.
- Dagg JL (2011) Exploring mouse trap history. Evolution: Education and Outreach 4: 397-414.
- Drummond D, Brand CR, Koch JL (2002) William C. Hooker's great american mouse trap. North American Trap Collectors Association, Galloway, OH. The article is available at www.mousetrapbooks.com/ (click on "William C. Hooker's Great American Mouse Trap").
- Hooker WC (1879) Improvement in animal-traps. United States Patent Office, patent no. 218,532.
- Hooker WC (1894) Animal-trap. United States Patent Office, patent no. 528,671.
- Hope J A (1996) Better mousetrap. American Heritage Magazine 47(6). http://www.americanheritage.com/articles/magazine/ah/1996/6/1996_6_90.shtml. Accessed November 8, 2009.
- Mast JM (1899/1903) Animal-trap. United States Patent Office, patent no. 744,379.
- Maxim HS (1915) My life. London: Methuen & Co.
- Shanks N, Joplin K. (2000) Of mousetraps and men: Behe on biochemistry. Reports of the NCSE 20(1-2):25-30.