Magnetic disc cartridge with counter display secured against ina

Details Magnetic disc cartridge with counter display secured against ina Magnetic disc cartridge with counter display secured against ina

1984-06-29

1986-12-30

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record medium

In container

360 99, 235103, 116309, G11B 2303, G11B 5016, G11B 5012

Patent

active

046333568

ABSTRACT:
A disc cartridge having a magnetic sheet jacket, a magnetic disc rotatably accommodated therein, and a window permitting the insertion of a magnetic head, is provided with a counter display member which is rotatably mounted in said jacket and surrounded, on the upper side of the jacket, by a graduated display scale and which has a keyhole-like aperture forming a radially oriented pointer and adapted to receive a drive pin. The counter display member is associated with an elastically acting click and pawl arrangement and has a first series of teeth formed on a flange-like portion of said counter display member and a click fixed to said jacket and elastically engaging the teeth of said first series of teeth and is also associated with a blocking device which keeps the counter display member in a firmly locked position as soon as it is mechanically disconnected from the drive pin.

REFERENCES:
patent: 4202614 (1980-05-01), Harvey
patent: 4536813 (1985-08-01), Saito

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