The Safety Pin Essay by The Research Group

The Safety Pin
Examines its invention, description, physics and operation.
# 14467 | 450 words | 4 sources | 1999 | US
Published on Jul 17, 2003 in History (European) , Engineering (General)


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Description:

"In 1849 Walter Hunt of New York City patented the safety pin. He constructed it from a piece of brass wire about eight inches long, coiled at the center and shielded at one end.

From the Paper:

"In 1849 Walter Hunt of New York City patented the safety pin. He constructed it from a piece of brass wire about eight inches long, coiled at the center and shielded at one end. Reportedly Mr. Hunt invented the safety pin in order to pay off a $15 debt. Later, Mr. Hunt sold the patent for his device for $400 (Those were the days, 1998)."

Description
The safety pin is a clever combination of a locking device coupled with a torsion spring to provide potential energy, ensuring a close fit. This unique performance makes this spring a very..."

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