Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
207 words
In a safety and arming device for a fuse in a launchable missile which includes a housing, a turbine wheel driven by ram air, a rotatable drive shaft coupled to said turbine wheel, a rotatable countershaft releasably coupled to said drive shaft at one end thereof and axially displaceable from said drive shaft as a result of rotation thereof, a shutter disposed within said housing and rotatable about the longitudinal axis of said countershaft, and a spring which rotatably urges said shutter from a safety position to an arming position, the improvement which comprises: first means for retaining said shutter in said safety position which is responsive to acceleration of said missile for releasing said shutter; second means for retaining said shutter in said safety position which is responsive to the axial displacement of said countershaft for releasing said shutter, said countershaft having the other end thereof threadably coupled to said housing; and means positioned between said first and second retaining means for preventing the axial displacement of said countershaft until after said first retaining means has released said shutter; said countershaft having a peripheral groove formed thereabout which is firstly engageable by said preventing means and then, after said axial displacement, by said second retaining means.
Claim 2
Dependent Claim
207 words
In a safety and arming device for a fuse in a launchable missile which includes a housing, a turbine wheel driven by ram air, a rotatable drive shaft coupled to said turbine wheel, a rotatable countershaft releasably coupled to said drive shaft at one end thereof and axially displaceable from said drive shaft as a result of rotation thereof, a shutter disposed within said housing and rotatable about the longitudinal axis of said countershaft, and a spring which rotatably urges said shutter from a safety position to an arming position, the improvement which comprises: first means for retaining said shutter in said safety position which is responsive to acceleration of said missile for releasing said shutter; second means for retaining said shutter in said safety position which is responsive to the axial displacement of said countershaft for releasing said shutter, said countershaft having the other end thereof threadably coupled to said housing; and means positioned between said first and second retaining means for preventing the axial displacement of said countershaft until after said first retaining means has released said shutter; said countershaft having a peripheral groove formed thereabout which is firstly engageable by said preventing means and then, after said axial displacement, by said second retaining means.
Claim 3
Dependent Claim
55 words
The device as set forth in claim 1, wherein said housing further comprises a stationary sleeve through which said countershaft extends, said sleeve having apertures formed therethrough in which are positioned said second retaining means, said shutter further having axial grooves formed therein for receivably engaging said second retaining means when in said safety position.
Claim 4
Dependent Claim
68 words
The device as set forth in claim 2, wherein said preventing means is moveable perpendicularly to the longitudinal axis of said countershaft, wherein said housing further includes a radial slot having two apertures into one of which extends said preventing means, and wherein said peripheral groove of said countershaft includes a cam surface of urging said preventing means radially outwardly within said slot upon the axial displacement thereof.
Claim 5
Dependent Claim
55 words
The device as set forth in claim 3, wherein said first retaining means extends into the other aperture of said radial slot prior to the release of said shutter thereby, the portion of said first retaining means extending through said second slot serving as an abutment to prevent outward radial movement of said preventing means.