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

Suppose we attempt to remedy the fault by bending forward the guard pin b, as indicated by the dotted outline b' in Fig.

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

The function performed by the outer face of the prong of a fork is to prevent the engaged pallet from unlocking while the guard pin is opposite to the passing hollow.

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 Louisa May Alcott

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