192 clutches and power-stop control – Field responsive frictional media type
Patent
1980-05-06
1982-04-27
Bonck, Rodney H.
192 clutches and power-stop control
Field responsive frictional media type
192 35, 192 489, 192 81C, 192 84T, F16D 1308, F16D 2712
Patent
active
043266134
ABSTRACT:
A wrap-down spring clutch includes a drum and a spring which are selectively engaged by a solenoid. The solenoid has a coil, which when energized, extends a ferromagnetic plunger. When the coil is energized the plunger is extended out against the spring and urges the same into frictional engagement with the drum. The drum is also ferromagnetic, such that the activation of the coil simultaneously magnetizes the plunger, and creates a magnetic attraction between the plunger and the drum which further urges the plunger against the spring and the drum to produce a wrap-down pressure which effects quick and secure clutch engagement.
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Bonck Rodney H.
Joerns Furniture Company
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