Magnetic tape reel with stop means

Claim 1

An improved magnetic tape reel having a hub with a slot therein for receiving one end of a magnetic tape therein and two disc side members integrally joined to said hub, an axis of each said disc member disposed in coaxial relationship to an axis of said hub, each said side member having openings therein, said opening defined by radially extending sides and an arcuate section having the center curvative thereof proximate to said axis of said hub, one said disc member having a center splined hole therein, wherein the improvement comprises: a. each said disc having a plurality of apertures therethrough, each said aperture of one said disc member being aligned with one of said apertures of said other disc members, said apertures of each said disc member being disposed at a plurality of different radii from said axis of said hub, an axis of each said aperture being coaxially aligned with said axis of said hub; b. a pin member, said pin member disposed in one of said plurality of a pair of said aligned apertures of said two disc members, said pin extending between said two disc members, said tape unwinding as said reel revolves until said tape engages said pin between said two disc members, an amount of said unwinding of said tape being dependent upon location of said pin in one of said pairs of said aligned apertures.