guard pin

American

noun

Horology.

(in a lever escapement) a pin on the lever, meeting the safety roller in such a way as to prevent the lever from overbanking.

Etymology

Origin of guard pin

First recorded in 1875–80

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

When the lock, drop and draw are correct it is next necessary to see that the fork length and guard pin freedom are correct.

From Project Gutenberg

Roller jewel long and rubs guard pin.

From Project Gutenberg

Among these causes that of Poor Motion covers a number of troubles such as roller jewel rubbing in fork, guard pin rubbing roller, strong lock on the escapement, or no lock on some teeth.

From Project Gutenberg

The guard pin length also must be obtained with the bankings closed to drop and should be just free from the safety roller on both sides.

From Project Gutenberg

Guard pin rubbing edge of safety roller.

From Project Gutenberg

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023