triphammer

[trip-ham-er]
noun
1.
Machinery. a heavy hammer raised and then let fall by means of some tripping device, as a cam.
adjective
2.
of, resembling, or characteristic of the repetitive and forceful pounding of a triphammer: He was subjected to triphammer interrogation by the police detectives.
Also, trip hammer.


Origin:
1775–85, Americanism; trip1 + hammer

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Collins
World English Dictionary
triphammer (ˈtrɪpˌhæmə)
 
n
a power hammer that is raised or tilted by a cam and allowed to fall under gravity

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
Waterpower raised and dropped a heavy triphammer to forge wrought iron tools.
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