Abstract: A friction clutch for a vehicle utilizes a snap connection and self indexing to insure accurate presentation during installation. The release mechanism of the clutch includes a first member for applying release forces to a second member which releases the clutch.

Abstract: The clutch comprises a clutch plate 10 which can be retracted by a release mechanism 20 to release a driven plate 12. The release mechanism comprises first and second members 24, 26 and an intermediate detent 25. The detent is rotatably mounted on member 24. The detent is located between the members in an operative position by urging the first member in one direction relative to the second member. To separate the members, the first member is urged further in the one direction to enable a detent release ring 37 to rotate the detent 25 into a release position.

Abstract: A method for determining the state-of-charge for zinc mercuric oxide type primary cells. I-V curves of the cells are plotted and the nearly constant slopes of these I-V curves above 75mA are measured graphically. These slopes are used to define effective differential DC resistance values (.DELTA.V/.DELTA.I).sub.75mA which have a linear relationship to charge expended, Q(A-h), which is graphically produced by plotting (.DELTA.V/.DELTA.I).sub.75mA versus Q(A-h). This relationship is used as a basis for a state-of-charge indicator to determine the remaining charge to about 12%. One can also subtract the internal resistance of the cell (measured with an a-c bridge technique) from (.DELTA.V/.DELTA.I).sub.75mA and obtain a new parameter, R.sub.p, which is related to the polarization resistance of the cell. The maximum uncertainty can be reduced to less than 10% if the linear curve is produced by plotting polarization resistance R.sub.p of the cell versus the charge expended Q(A-h).