guard pin

American  

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.

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Etymology

Origin of guard pin

First recorded in 1875–80

Example Sentences

See Examples For:

guard pin

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 Rules and Practice for Adjusting Watches by Kleinlein, Walter J.

The remaining part of the safety action is the guard pin shown at N Figs.

From Watch and Clock Escapements A Complete Study in Theory and Practice of the Lever, Cylinder and Chronometer Escapements, Together with a Brief Account of the Origin and Evolution of the Escapement in Horology by Anonymous

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 Rules and Practice for Adjusting Watches by Kleinlein, Walter J.

In reply we would offer the supposition that some workman had bent the guard pin forward or set a pallet stone too far out.

From Watch and Clock Escapements A Complete Study in Theory and Practice of the Lever, Cylinder and Chronometer Escapements, Together with a Brief Account of the Origin and Evolution of the Escapement in Horology by Anonymous

The position of the guard pin should be as close to the bottom of the slot of the fork as possible and be safe.

From Watch and Clock Escapements A Complete Study in Theory and Practice of the Lever, Cylinder and Chronometer Escapements, Together with a Brief Account of the Origin and Evolution of the Escapement in Horology by Anonymous