Cartridge and flexible magnetic disk assembly
AssigneeInternational Business Machines Corporation
InventorsTownsend H. Porter, Jr., Robert E. Schopp
Life of this patent
Estimating the term…
Abstract
A thin flexible magnetic disk rotatably disposed in a cartridge of rigid material and protected thereby. The disk is loosely mounted on a driving hub assembly and has an arrow shaped center hole surrounding a central round hub portion of the hub assembly. A drive pin is carried by the hub assembly and extends loosely through a corresponding hole located in the disk and spaced from the center of the hub assembly and located on a radial line preferably of about 90 degrees with respect to a radial line passing through the apex of the straight hole edges forming the arrow so that the disk is automatically centered on the hub assembly due to any restraint on the disk during its rotation.
Claims20
A magnetic disk having a first, non-round central opening therethrough and being formed with an abutment for drivingly rotating the disk about said central opening and which is spaced from said central opening, said non-round central opening having a pair of camming edges extending toward each other at a first angle and toward an apex located on a first radial line of the disk, said abutment being located on a second radial line of the disk extending at a second angle with respect to said first radial line.
A magnetic disk assembly comprising:
- a magnetic disk member having a first, central opening therethrough and being formed with an abutment for drivingly rotating the disk about said central opening and which is spaced from said central opening,
- a hub assembly having a hub member extending loosely through said central opening of said disk member for loosely mounting said disk member on the hub assembly and having a driving portion engaging with said abutment for thereby driving said disk member along with the hub assembly, said hub member having exterior camming surfaces and said disk member having interior camming surfaces constituting portions of the edges of said central opening of said disk member which cooperate with the exterior camming surfaces of said hub member,
- the tangents passing through said camming surfaces of one of said members when said interior and exterior camming surfaces are in engagement extending toward each other at a first angle and toward an apex which is located on a first radial line of said disk member and said abutment being located on a second radial line of said disk member which is disposed at a second angle with respect to said first radial line whereby the hub assembly in driving said abutment causes said exterior and interior camming surfaces to move into and remain in contact so as to thereby locate said disk member at a certain fixed position on said hub member.
Dependencies are inferred from the claim text.