GB617722A - Improvements relating to variable speed gears - Google Patents

Abstract

617,722. Controlling change-speed gearing. MORRIS MOTORS, Ltd., and DANIELS, W. J. Oct. 24, 1946, No. 31561. [Class 80 (ii)] A change-speed gear, providing at least four forward speeds and a reverse, having rotatable selectors, one individual to the reverse gear, has interlocking mechanism comprising a pair of coacting detents operating substantially at right angles and interlocking so that only one selector can be turned at a time, and must be returned to the neutral position before movement of another selector. The selectors for 1st and 2nd, 3rd and 4th and reverse have rotatable selector quadrants 2, 3, 4 respectively, having notches 5, 6, 7 and 17, 18 in their peripheries, which are engageable by a detent device 8 mounted between them. The device 8 carries a sliding tubular member 9 carrying ball detents U loaded by a spring 12, and has a circumferential groove 13. This groove cooperates with the end of a second detent plunger 14 having a ball end 16 engageable with the notches 17, 18 of the reverse selector and loaded with the spring 15. Movement of any one of the quadrants for engagement of one of the notches 6, 7, 18, which are shallower than notches 5, 17, interlocks the selectors by moving the balls 11 into the neutral notches 5 or moving the plunger 14 into the groove 13. The mechanism is mounted in the lid of the gear-box and each selector quadrant is operated by its individual external lever, which may be operated from a column shifter.