We delved into designing a pin with enough stiffness in the wire so that
the pointed end would not bend out of the clip head and keep the tip
from accidentally disengaging; we laughed over deburring the parts so
that Mom's fingers and the baby's fanny wouldn't get scratched, and
quickly agreed on the need to coat the pin with a rust inhibitor to protect
it from the corrosive effects of dank cloths in warm places. We explored
packaging, marketing and replacement factors.
By now his hair was almost dry and he finger-combed it spikey.
'Hey, ol' man,' he said, 'this is a good rap, but it's only a safety pin.'
'Don't knock it,' I replied. 'Safety pins, in one form or another, have been
industrial and household tools for centuries and will be for many more.
Anyhow, we're using it as an example, the same principles apply whether
it's a safety pin, a computer, TV, or space ship. Getting back to your part
of the job, when you've got it all together, and understand it and the
customer's needs, then you're close to starting the writin' job.
'Based on who wants to know, you might need to spell out what the parts
are made from, their dimensions, the diameter of the spring loop, and the
wire's bending limits.
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