Single printing element positioning mechanism

Claim 2

Mechanism for positioning a type body, having type located thereon in rows and columns, about first and second axes intersecting interiOrly of said type body to present a selected type for printing, a secondary support member mounting said type element for rotation about said first axis to present a selected row of type for printing, a primary support member mounting said secondary support member for rotation about said second axis to present a selected column on said type body for printing, said primary support member being swingable to a printing position about a third axis external to said type body and parallel to said first axis to print the type at a selected row and column position, said second axis extending through said first and third axes, selectively movable row and column positioning members, means to rotate said type body about said first axis, means to rotate said secondary support member about said second axis, a first motion-transmitting articulate connection connecting said row positioning member and said means to rotate said type body about said first axis, and a second motion-transmitting articulate connection connecting said column positioning member and said means to rotate said secondary support member about said second axis, said articulate motion-transmitting connections, when said positioning members are in a midposition being coincident with said third axis, and in all other positions of said positioning members lying substantially along the line of said second axis extending between said first and third axes when said type body is swung about said third axis to printing position, said means to rotate said secondary support member about said second axis comprising, a bellcrank pivotally carried on said primary support member and having one arm operable by said column positioning member through said motion-transmitting articulate connection connected thereto, an arm on said secondary support member for rotating said secondary support member, and articulate means connecting a second arm of said bellcrank with the arm of said secondary support member.

Claim 3

The invention set forth in claim 1, said articulate means associating the second arm of said bellcrank with the arm of the secondary support member comprising a ball and fork.

Claim 4

The invention set forth in claim 1, said bellcrank having a pivot axis perpendicular to a plane defined by said first and third axes when the type body is in printing position.

Claim 5

Mechanism for positioning a type body, having type located thereon in rows and columns, about first and second axes intersecting interiorly of said type body to present a selected type for printing, a secondary support member mounting said type element for rotation about said first axis to present a selected row of type for printing, a primary support member mounting said secondary support member for rotation about said second axis to present a selected column on said type body for printing, said primary support member being swingable to a printing position about a third axis external to said type body and parallel to said first axis to print the type at a selected row and column position, said second axis extending through said first and third axes, selectively movable row and column positioning members, means to rotate said type body about said first axis, means to rotate said secondary support member about said second axis, a first motion-transmitting articulate connection connecting said row positioning member and said means to rotate said type body about said first axis, and a second motion-transmitting articulate connection connecting said column positioning member and said means to rotate said secondary support member about said second axis, said articulate motion-transmitting connections, when said positioning members are in a midposition being coincident with said third axis, and in all other positions of said positioning members lying substantially along the line of said second axis extending between said first and third axes when said type body is swung about said third axis to printing position, each of said positioning members comprising an arm pivotally mounted with capacity for some endwise movement, said motion-transmitting articulate connection connected to each said arm being associated with the end thereof removed from its pivot, and means to guide said arm closely adjacent said end along a straight line path so that the motion-transmitting connection connected thereto in all positions of said arm will lie substantially along said second axis when said type body is swung to printing position.

Claim 6

Mechanism for positioning a type body, having type located thereon in rows and columns, about first and second axes intersecting interiorly of said type body to present a selected type for printing, a secondary support member mounting said type element for rotation about said first axis to present a selected row of type for printing, a primary support member mounting said secondary support member for rotation about said second axis to present a selected column on said type body for printing, said primary support member being swingable to a printing position about a third axis external to said type body and parallel to said first axis to print the type at a selected row and column position, said second axis extending through said first and third axes, selectively movable row and column positioning members, means to rotate said type body about said first axis, means to rotate said secondary support member about said second axis, a first motion-transmitting articulate connection connecting said row positioning member and said means to rotate said type body about said first axis, and a second motion-transmitting articulate connection connecting said column positioning member and said means to rotate said secondary support member about said second axis, said articulate motion-transmitting connections, when said positioning members are in a midposition being coincident with said third axis, and in all other positions of said positioning members lying substantially along the line of said second axis extending between said first and third axes when said type body is swung about said third axis to printing position, each of said positioning members comprising an arm pivotally mounted with capacity for some endwise movement, said motion-transmitting articulate connection connected to each said arm being associated with the end thereof removed from its pivot, and means to guide said arm closely adjacent said end along a straight line path so that the motion-transmitting connection connected thereto in all positions of said arm will lie substantially along said second axis when said type body is swung to printing position.

Claim 7

The invention set forth in claim 4, said means to guide said arm comprising a stud, and a pivot bolt rotatably mounted on said arm, said stud passing through said pivot bolt.