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US 4,398,801 AGranted
Detonator-activated ball shutter
OwnerRoy A. McWilliams, William G. von Holleinventors
Life of this patent
Estimating the term…
Abstract
A detonator-activated ball shutter for closing an aperture in about 300.mu. seconds. The ball shutter containing an aperture through which light, etc., passes, is closed by firing a detonator which propels a projectile for rotating the ball shutter, thereby blocking passage through the aperture.
Claims8
A shutter mechanism comprising:
- a rotatable member having an opening therethrough through which light passes, and an explosive-activated means for rotating said member such that light is substantially blocked from passing through said opening, said explosive-activated means including means defining a firing chamber and a barrel, an explosive detonator positioned in said firing chamber, a projectile at least partially positioned in said barrel, whereupon activation of said detonator causes said projectile to be driven through said barrel for rotating said member.
A shutter mechanism comprising:
- a rotatable member having an opening therethrough through which light passes, and explosive-activated means for rotating said member such that light is substantially blocked from passing through said opening, said rotatable member being mounted on at least one shaft, and provided with a lever arm secured to said shaft;
- said explosive-activated means comprising a housing defining therein a firing chamber and a barrel extending from said firing chamber to an exterior portion of said housing and positioned to be in alignment with said lever arm, an explosive detonator operatively mounted in said firing chamber, and a projectile at least partially positioned in said barrel, whereby detonation of said explosive detonator drives said projectile against said lever arm causing rotation of said member.
In an apparatus for allowing passage therethrough in one direction along a path and preventing passage therethrough from the opposite direction, the improvement comprising:
- a detonator-activated ball shutter havin a member defining an aperture therein positioned to allow passage therethrough along a path, and an explosive detonator for activating means for rotating said member such that said aperture is not positioned to allow passage therethrough along the path, said member being provided with a lever secured thereto, said means for rotating said member including a projectile, said projectile being driven by force created by said explosive detonator to contact said lever causing rotation of said member.
Dependencies are inferred from the claim text.