Cam gear for actuating a reel brake mechanism in a video cassett

Details Cam gear for actuating a reel brake mechanism in a video cassett Cam gear for actuating a reel brake mechanism in a video cassett

1996-04-29

1998-02-03

Nguyen, John Q.

Winding, tensioning, or guiding

Unwinding and rewinding a machine convertible information...

With particular drive

242333, 2423341, 360 71, 360 741, G11B 1532, G11B 1500, G11B 1546, G11B 1518

Patent

active

057135320

ABSTRACT:
A cam gear is provided with a camming groove including an inside camming face and an outside camming face. The inside camming face is divided into a stop mode inner-section of a first constant radius, a play mode inner-section of a second constant radius, the second constant radius being larger than the first radius, and a first transition section formed in a manner that an end of the stop mode inner-section is smoothly joined to a beginning of the play mode inner-section. The outside camming face is divided into a stop mode outer-section of a third constant radius, the third constant radius being larger than the first constant radius by a predetermined camming groove width, a play mode outer-section of a fourth constant radius, the fourth constant radius being larger than the second radius by the camming groove width, an intermediate mode outer-section of a fifth constant radius, the fifth constant radius being larger than the third constant radius and being smaller than the fourth constant radius, a second transition section formed in a manner that an end of the stop mode outer-section is smoothly joined to a beginning of the intermediate mode outer-section, and a third transition section formed in a manner that an end of the intermediate mode outer-section is smoothly joined to a beginning of the play mode outer-section.

REFERENCES:
patent: 4899951 (1990-02-01), Okada et al.
patent: 5570253 (1996-10-01), Lee

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