Silencer for mounting on firearm barrel

Claim 1

A device adapted to be mounted on and in axial alignment with the barrel of a firearm having an externally threaded end, comprising a hollow sleeve of internal diameter greater than the external diameter of the barrel, fixedly connected to the sleeve at a point spaced from at least one end of the sleeve means defining an internally threaded bore adapted to receive coaxially the externally threaded end of the barrel with the threads of the barrel engaging the threads of the bore, and, connected to the sleeve at a point spaced from the means defining the bore, means for compressively clamping the barrel, the clamping means comprising an annular bushing the exterior of which tapers inwardly in the axial direction toward the bore defining means and said bushing having a slit therethrough and being of internal diameter, when uncompressed, greater than the external diameter of the barrel and, when so compressed that the slit is completely closed, no greater than the external diameter of the barrel and means for compressing the bushing thereby to narrow the slit and bring the bushing into annular engagement with the barrel, fixedly connected to the sleeve means defining a second bore, the second bore having a taper which mates with the taper of the bushing and having a portion of diameter sufficiently less than the diameter of the uncompressed bushing to compress the bushing to an internal diameter no greater than the external diameter of the barrel when the bushing is urged into diametrical alignment with said portion, and means for urging the bushing into said diametrical alignment, means defining external threads on a fixed cylindrical surface having a free end and being coaxial with the second bore, an annular collar having internal threads, the free end of the cylindrical surface being received in the collar with the threads on the surface engaging the threads in the collar, the collar including means defining a surface transverse to the axis of the sleeve and abutting against the end of the bushing at which the diameter of the second bore is larger and thereby being adapted to urge the bushing into said diametrical alignment.

Claim 2

A device adapted to be mounted on and in axial alignment with the barrel of a firearm having an externally threaded end, comprising a hollow sleeve of internal diameter greater than the external diameter of the barrel, fixedly connected to the sleeve at a point spaced from at least one end of the sleeve means defining an internally threaded bore adapted to receive coaxially the externally threaded end of the barrel with the threads of the barrel engaging the threads of the bore, and, connected to the sleeve at a point spaced from the means defining the bore, means for compressively clamping the barrel, the clamping means comprising an annular bushing the exterior of which tapers inwardly in the axial direction toward the bore defining means and said bushing having a slit therethrough and being of internal diameter, when uncompressed, greater than the external diameter of the barrel and, when so compressed that the slit is completely closed, no greater than the external diameter of the barrel and means for compressing the bushing thereby to narrow the slit and bring the bushing into annular engagement with the barrel, fixedly connected to the sleeve means defining a second bore, the second bore having a taper which mates with the taper of the bushing and having a portion of diameter sufficiently less than the diameter of the uncompressed bushing to compress the bushing to an internal diameter no greater than the external diameter of the barrel when the bushing is urged into diametrical alignment with said portion, and means for urging the bushing into said diametrical alignment, means defining external threads on a fixed cylindrical surface having a free end and being coaxial with the second bore, an annular collar having internal threads, the free end of the cylindrical surface being received in the collar with the threads on the surface engaging the threads in the collar, the collar including means defining a surface transverse to the axis of the sleeve and abutting against the end of the bushing at which the diameter of the second bore is larger and thereby being adapted to urge the bushing into said diametrical alignment.