On Sat, 08 Feb 2014 19:24:59 -0800, son_of_flubber wrote:

On Saturday, February 8, 2014 6:42:52 PM UTC-5, son_of_flubber wrote:

Here is the 1870 patent for something that look a lot like the
Schweitzer tow hook. Click on the thumbnail for a drawing.

http://www.google.ca/patents/US102067

That doesn't look to be any more an automatically releasing hook than the
Schweitzer is.


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martin@ | Martin Gregorie
gregorie. | Essex, UK
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