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

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

It is well to put a slight friction under the balance rim, in order that we can try the freedom of the guard pin.

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 drawing a fork and roller action it is safe to show the guard pin as if in actual contact with 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

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

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