Print hammer and coil assembly

Claim 2

A hammer for use in a high speed printer or the like comprising: an elongated body member; and an elongated thin wire coil located within said body member, wherein said coil is hex-wound, has a plurality of turns and a plurality of successive layers of turns, wherein the number of said layers is substantially greater than the number of turns in each layer, said turns are generally perpendicular to the central axis of said coil, and each layer of turns is slanted with respect to said central axis at an angle of approximately 30 degrees with respect to said axis, wherein each turn at one end of each layer lies in a first common plane and each turn at the other end of each layer lies in a second common plane parallel to the first common plane, said coil having flat sides and maximum packing density.

Claim 3

The hammer of claim 1 wherein said body member includes a pair of narrowly spaced parallel plates and the sides of said coil are sandwiched between said plates, thereby achieving maximum wire packing with minimum hammer width.

Claim 4

The hammer of claim 2 wherein an adhesive surrounds the turns of said coil, thereby forming a honeycomb matrix, and wherein said plates are bonded to the sides of said coil by means of said adhesive.

Claim 5

A hammer for use in a high speed printer or the like, comprising: a flat-sided, elongated coil having a plurality of turns, each turn comprising a revolution of wire about a central axis of the coil, said coil having a plurality of successive layers of turns each successive layer being spaced further from the central axis than the preceding layer, said coil characterized when viewed in a cross-section in a plane including the central axis of said coil, in that: each layer of said coil contains the same number of turns; the number of layers of turns is substantially greater than the number of turns in each layer; the wire is packed in a hex fashion; and the axis of each wire at one end of every layer lies in a line parallel to a first side of said coil, the axis of each wire at the other end of every layer lies in another line parallel to the other side of said coil and parallel to the first side of the coil; and an elongated body member within which the coil is carried.

Claim 6

A hammer for use in a high speed printer or the like, comprising: a flat-sided, elongated coil having a plurality of turns, each turn comprising a revolution of wire about a central axis of the coil, said coil having a plurality of successive layers of turns each successive layer being spaced further from the central axis than the preceding layer, said coil characterized when viewed in a cross-section in a plane including the central axis of said coil, in that: each layer of said coil contains the same number of turns; the number of layers of turns is substantially greater than the number of turns in each layer; the wire is packed in a hex fashion; and the axis of each wire at one end of every layer lies in a line parallel to a first side of said coil, the axis of each wire at the other end of every layer lies in another line parallel to the other side of said coil and parallel to the first side of the coil; and an elongated body member within which the coil is carried.

Claim 7

The print hammer of claim 4 wherein the wires of the coil are embedded in a honeycomb matrix of adhesive.

Claim 8

The print hammer of claim 5 wherein the body is comprised of a metal plate adjacent each side of the coil and attached to the adhesive matrix.

Claim 9

A print hammer for use in high speed printers or the like, said print hammer including: a flat sided elongated multilayered coil characterized when viewed in a plane including the central axis of the coil in that each layer of the coil contains the same number of turns, the number of layers of turns exceeds the number of turns in each layer, the wire is packed in a hex fashion, the axis of each wire at one end of every layer lies in a line parallel to a first side of the coil, and the axis of each wire at the other end of every layer lies in another line parallel to the other side of the coil and parallel to the first side of the coil, wherein the number of turns in each layer of the coil is less than ten; a honeycomb matrix of adhesive in which the wires of the coil are embedded; and a pair of metal plates, one adjacent to each side of the coil and attached to the adhesive matrix, wherein at least one of the metal plates includes a centering boss embossed on one side thereof for positioning the coil with respect to the plates.

Claim 10

A print hammer for use in high speed printers or the like, said print hammer including: a flat sided elongated multilayered coil characterized when viewed in a plane including the central axis of the coil in that each layer of the coil contains the same number of turns, the number of layers of turns exceeds the number of turns in each layer, the wire is packed in a hex fashion, the axis of each wire at one end of every layer lies in a line parallel to a first side of the coil, and the axis of each wire at the other end of every layer lies in another line parallel to the other side of the coil and parallel to the first side of the coil, wherein the number of turns in each layer of the coil is less than ten; a honeycomb matrix of adhesive in which the wires of the coil are embedded; and a pair of metal plates, one adjacent to each side of the coil and attached to the adhesive matrix, wherein at least one of the metal plates includes a centering boss embossed on one side thereof for positioning the coil with respect to the plates.