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Seth Thomas Escapement - Movement 89C

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Uploaded by on Mar 5, 2009

The semi-deadbeat escapement of the Seth Thomas No. 89C movement. (from an Adamantine mantel clock). The time mainspring is run down 6 1/2 days for this movie, notice that the escapement takes a good, but not excessive motion. This example has a thin time mainspring of 0.016 inches. Stronger springs cause the escapement motion to be more than necessary, and cause excessive wear.

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Science & Technology

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