guard pin

noun

, Horology.

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

Word History and Origins

Origin of guard pin¹

First recorded in 1875–80

Example Sentences

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