The Em­pire Pa­tent 1910

Shooting Gazette - - The Empire Patent 1910 -

W.W. Greener’s in­ten­tion in gun de­sign was to build a gun com­posed of a few sim­ple, strong parts. His son Harry Greener con­tin­ued this tra­di­tion and in pa­tent no. 12012 of 1910 cre­ated the Em­pire boxlock util­is­ing just three parts: a tum­bler, a sear and a spring.

The spring is in­ge­nious, be­ing both a cock­ing de­vice and a main­spring. It is a V spring with the up­per limb longer than the lower. After the gun is fired, the for­ward end of the main­spring projects for­wards slightly through the knuckle. As the bar­rels open, the fore-end iron forces back the main­spring and as it moves back­wards, the up­per limb ro­tates the tum­bler to full cock. In do­ing so, the bottom of the tum­bler rises and com­presses the spring.

The mech­a­nism was sim­ple and ro­bust, and with so few parts was very re­li­able. It is no won­der that from the first gun built in 1910 to the last in 1965, over 17,000 were built and a re­li­able rep­u­ta­tion cre­ated.

The mech­a­nism of the three-part Em­pire showing the sear, the tum­bler and the main­spring.

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