192 clutches and power-stop control – Clutches – Operators
Patent
1997-09-26
1999-07-06
Marmor, Charles A.
192 clutches and power-stop control
Clutches
Operators
192 81C, 192 72, 192 51, 192 43, 74665GA, F16D 1900, F16D 1106, F16H 3706
Patent
active
059187166
ABSTRACT:
A magnetic flux path mechanism for a solenoid actuated device includes a stationary coil for generating lines of magnetic flux when energized, a stationary case enclosing the stationary coil on an outside perimeter of the coil, and a rotatable sleeve disposed on an inside perimeter of the stationary coil. A magnetic flux path is provided through the stationary case and rotatable sleeve about the stationary coil. In a preferred embodiment, a wrap spring is disposed on an output shaft of the solenoid actuated device and is normally engaged on its outside perimeter with the inside perimeter of the rotatable sleeve. The rotatable sleeve is continuously driven in a forward direction and, because of the self engaging wrap spring, drives the output shaft in the forward direction. The sleeve is of an iron composition as it forms part of the core of the solenoid for enabling the magnetic flux. When the coil is energized, a floating control ring enables the solenoid thereby enabling the output shaft to be driven in a reverse direction. Gearing is utilized in connection with a single input drive shaft such that the rotatable sleeve is continuously driven in the forward direction, and the shoulder is continuously driven in the reverse direction. Thus, the output shaft is continuously driven in the forward direction by the self-energizing spring and rotatable sleeve until the coil is energized whereby the output shaft is driven in the reverse direction by the spring being wrapped down in response to the control ring being attracted to the shoulder.
REFERENCES:
patent: 2959986 (1960-11-01), Irgens et al.
patent: 3315773 (1967-04-01), Aschauer
patent: 4321992 (1982-03-01), Gallo
patent: 4655724 (1987-04-01), Law
patent: 4825988 (1989-05-01), Nishimura
patent: 5127502 (1992-07-01), Billings
Hewlett--Packard Company
Marmor Charles A.
Pang Roger
Simmons Lane R.
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