Abstract A high speed type element positioning mechanism has a type head member having therein a plurality of type elements and a type head shaft on which the type head is mounted. The type head member has a spherical surface thereon through which the axis of the type head shaft extends, the type elements being mounted in the type head member with the faces thereof on the spherical surface and movable in the type head member for being projected beyond the spherical surface. The type elements lie along latitudinal circles on the surface the centers of which lie on the axis of the type head shaft, the type elements in adjacent latitudinal circles being substantially aligned along longitudinal circles extending from the point of intersection of the type head shaft axis and the spherical surface. The type head shaft is pivotally mounted for pivotal movement around a point corresponding to the center of the sphere of which the spherical surface forms a part, and a type hammer is positioned adjacent the type head for striking a type element for projecting it beyond the spherical surface for carrying out a printing action. A first drive means is coupled to the type head shaft for rotating the shaft in response to a signal corresponding to a character to be printed for rotating the type head member for aligning the type member corresponding to the character to be printed in a plane with the type hammer and the type head shaft, and a second drive means is coupled to the type head shaft for pivoting the type head shaft in the plane for aligning a type element in one of the circles with the type hammer.
A high speed type element positioning mechanism, comprising a type head member having therein a plurality of type elements, a type head shaft on which said type head is mounted, the type head member having a spherical surface thereon through which the axis of said type head shaft extends, said type elements being mounted in said type head member with the faces thereof on said spherical surface and movable in said type head member for being projected beyond said spherical surface, said type elements lying along latitudinal circles on said surface the centers of which lie on the axis of said type head shaft, the type elements in adjacent latitudinal circles being substantially aligned along longitudinal circles extending from the point of intersection of said type head shaft axis and said spherical surface, said type head shaft being pivotally mounted for pivotal movement around a point corresponding to the center of the sphere of which said spherical surface forms a part, a type hammer positioned adjacent said type head for striking a type element for projecting it beyond said sperical surface for carrying out a printing action and lying in a plane with the axis of said type head shaft, a first drive means coupled to said type head shaft for rotating said shaft in response to a signal corresponding to a character to be printed for rotating said type head member for aligning the type member corresponding to the character to be printed in the plane with said type hammer, and a second drive means coupled to said type head shaft for pivoting said type head shaft in said plane for aligning a type element in one of said circles with said type hammer.
Claim 2
Dependent Claim
285 words
A high speed type element positioning mechanism, comprising a type head member having therein a plurality of type elements, a type head shaft on which said type head is mounted, the type head member having a spherical surface thereon through which the axis of said type head shaft extends, said type elements being mounted in said type head member with the faces thereof on said spherical surface and movable in said type head member for being projected beyond said spherical surface, said type elements lying along latitudinal circles on said surface the centers of which lie on the axis of said type head shaft, the type elements in adjacent latitudinal circles being substantially aligned along longitudinal circles extending from the point of intersection of said type head shaft axis and said spherical surface, said type head shaft being pivotally mounted for pivotal movement around a point corresponding to the center of the sphere of which said spherical surface forms a part, a type hammer positioned adjacent said type head for striking a type element for projecting it beyond said sperical surface for carrying out a printing action and lying in a plane with the axis of said type head shaft, a first drive means coupled to said type head shaft for rotating said shaft in response to a signal corresponding to a character to be printed for rotating said type head member for aligning the type member corresponding to the character to be printed in the plane with said type hammer, and a second drive means coupled to said type head shaft for pivoting said type head shaft in said plane for aligning a type element in one of said circles with said type hammer.