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

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

When describing Fig. 24, we gave instructions for finding the dimensions of crescent and position of guard pin for the single roller.

From An Analysis of the Lever Escapement by Playtner, H. R.

One of the first results which would display itself would be discovered by the guard pin failing to perform its proper functions.

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

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

Be sure the guard pin does not interfere with the fork action in any way.

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