Device for rotating disc-shaped objects

Details Device for rotating disc-shaped objects Device for rotating disc-shaped objects

2005-04-05

2005-04-05

Howell, Daniel W. (Department: 3722)

Chucks or sockets

Socket type

Pivoted jaws

C279S106000, C279S117000, C279S125000, C279S140000

Reexamination Certificate

active

06874790

ABSTRACT:
A device for rotation of disc-shaped elements of different diameter, such as matrices for manufacturing audio and video discs. The device comprises a rotatable chuck (10) in which three arms (20) distributed evenly in the peripheral direction are pivotably mounted, the arms having a radially outer stop element (22) for contact with an outer peripheral edge of a disc element inserted in the chuck. The chuck has a rotatably mounted central gearwheel (18) which is preloaded by the tension spring elements (28) towards a rotational position in which the central gearwheel (18) tends to hold the arms (20) and their stop elements (22) in a pivoted-in position in the chuck. The arms (20) are synchronously pivotable towards a pivoted-out position counter to the action of the tension spring elements (28). The device comprises a retaining mechanism (30-40) which is configured to lock the rotation of the central gearwheel (18) relative to the base plate (16) when a predetermined speed of the chuck (10) is reached.

REFERENCES:
patent: 938873 (1909-11-01), Kleber
patent: 2207621 (1940-07-01), Hite
patent: 2444457 (1948-07-01), Marks et al.
patent: 2493574 (1950-01-01), Durkee
patent: 2593706 (1952-04-01), Von Zelewsky
patent: 3952384 (1976-04-01), Goldry et al.
patent: 4819527 (1989-04-01), Redman
patent: 5074176 (1991-12-01), Redman et al.
patent: 6364320 (2002-04-01), Domken

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