Abstract An in-line delay fuze mechanism wherein an inertial plunger having the plunger. central aperture therethrough, is free to slidingly move within a closed housing under the forces generated by the deceleration of the mechanism. The housing is provided at its forward end with a central inwardly facing firing pin having by-pass openings, and a formed inner annular recess. The plunger carries on its forward face, pivotally mounted, cooperating detents which are normally biased to close across the plunger central aperture and prevent the intrusion of the pin into a delay detonator disposed in said aperture immediately behind the detents. A spring located in said recess biases the plunger rearwardly and whose restraining force must be overcome by the inertial forces exerted on the plunger The rear face of the plunger is formed with a plurality of forwardly and radially extending recesses in which are disposed weighted spheres that are free to move therein. Under the spin action of the projectile, carrying the mechanism, the detents pivotally separate and expose the firing pin to the aligned detonator. Upon the sudden deceleration of the projectile, as by direct, lateral or grazing impact, inertial forces act on the spheres and/or the plunger causing the plunger to translate forward carrying with it the detonator which is impaled on the pin and activated thereby.
Inventors
👤 S Kosonocky
👤 L Post
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-07 21:27
CPC Classifications
F; F42; F42C; F42C15/00; F42C15/24; F42C15/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
224 words
An inertial in-line delay fuze which comprises: a generally cylindrical closed housing having a central axial aperture therethrough, the forward end thereof being formed to provide a central inwardly extending portion and an inner annular recess, a detonator activating means directed inwardly and carried by said central portion, said central portion having a plurality of openings communicating with the interior of said housing proximate said activating means, an inertial plunger having an axial opening therethrough disposed within said housing for free axial sliding movement therein and being formed with a plurality of equispaced radially and forwardly extending recesses in the rear end thereof, a weighted sphere disposed in each of said recesses for free movement therein, a pair of opposed coacting plate-like detent members pivotally supported on the forward face of said plunger for jointly closing and opening across said central axial aperture, detent bias means urging said detent members to close across said aperture, a detonator axially carried by said plunger disposed rearwardly of said detent members and in-line with said detonator activating means, a conical coil spring disposed in said annular recess urging said plunger rearwardly, whereby said inertial fuze is armed when it is subjected to a rotational motion and will detonate upon direct and grazing impact whereupon said plunger will be caused to translate forward with said detonator activating means.
Claim 2
Dependent Claim
224 words
An inertial in-line delay fuze which comprises: a generally cylindrical closed housing having a central axial aperture therethrough, the forward end thereof being formed to provide a central inwardly extending portion and an inner annular recess, a detonator activating means directed inwardly and carried by said central portion, said central portion having a plurality of openings communicating with the interior of said housing proximate said activating means, an inertial plunger having an axial opening therethrough disposed within said housing for free axial sliding movement therein and being formed with a plurality of equispaced radially and forwardly extending recesses in the rear end thereof, a weighted sphere disposed in each of said recesses for free movement therein, a pair of opposed coacting plate-like detent members pivotally supported on the forward face of said plunger for jointly closing and opening across said central axial aperture, detent bias means urging said detent members to close across said aperture, a detonator axially carried by said plunger disposed rearwardly of said detent members and in-line with said detonator activating means, a conical coil spring disposed in said annular recess urging said plunger rearwardly, whereby said inertial fuze is armed when it is subjected to a rotational motion and will detonate upon direct and grazing impact whereupon said plunger will be caused to translate forward with said detonator activating means.