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

Several letters were delicately cut on its golden stem, and a guard pin showed how much its wearer valued it.

From A Garland for Girls by Alcott, Louisa May

See that jewel pin reaches fork properly and that the guard pin also reaches the roller.

From A Treatise on Staff Making and Pivoting Containing Complete Directions for Making and Fitting New Staffs from the Raw Material by Hall, Eugene Edward

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

As a rule, all the guard pin needs is to be free and not touch the roller.

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.