Single revolution clutch with auto-homing feature

Details Single revolution clutch with auto-homing feature Single revolution clutch with auto-homing feature

1998-07-01

2000-03-07

Braun, Fred L.

Electrophotography

Cleaning of imaging surface

Retractable cleaning arrangement

192415, 192107C, 192109B, G03G 2100, F16D 1106, F16D 1100

Patent

active

060351756

ABSTRACT:
A single revolution clutch with an auto-home feature. This feature, added to the single revolution clutch, provides a mechanical home position stop. It utilizes the motion of the case to accomplish this. Whenever the clutch is energized, the case is pulled in, or the 1 mm gap is closed. The control ring has an additional single home detent on the opposite side to the one or more detents normally found on the single revolution clutch. The case has a tab feature, which can be punched out of the case itself, or can be tacked on as an additional piece of metal or plastic. This tab feature, seen as an "L" shape from the side, will move with the case. When the case is energized and closes its 1 mm gap, the normal detents on both the control ring and the case, spin free of each other. However, the "L" tab now moves closer to the single home tab on the other side of the control ring, and locks the control ring within one revolution of rotation or less. In this manner, the home position of the shaft is automatically located. When the case is released when the clutch is de-energized, the case moves out and the control ring rotates until the nearest detent locks with the normal detent on the case. The clutch continues operation in the normal manner, ie. pulsing periodically to move to the next shaft position, and so on.

REFERENCES:
patent: 3620339 (1971-11-01), Becking
patent: 3926286 (1975-12-01), Johnson
patent: 4227458 (1980-10-01), Kapoor
patent: 4445596 (1984-05-01), Waters et al.
patent: 4791455 (1988-12-01), Yamamoto et al.
patent: 5583626 (1996-12-01), Nagaoka
patent: 5669055 (1997-09-01), Thayer et al.

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