Shifting arrangement using a reversible geneva drive

Claim 2

Shifting arrangement comprising: a Maltese cross; first and second means continuously rotating in a respective forward and reverse direction; control cam means to control the selective engagement of said first and second means with said cross; locking means coupled to said first and second means and to said control means to insure smooth engagement of said first and second means only during predetermined portions of their rotation; and said locking means including a locking cam mounted on each side of said first and second means, said cam having a circumferential groove adapted to engage said control cam and a locking slot portion positioned at another portion of its circumference for a predetermined amount, and a locking lever mounted to abut said locking cam and thereby engage said locking slot portion during a predetermined portion of the rotation of said locking cam.

Claim 3

Shifting arrangement comprising: a Maltese cross rotatably mounted on a center axis; a first drive gear mounted on a first shaft in a first axis parallel to said center axis, said forward gear having means for indexing said cross in a first direction; a second drive gear engaging said first drive gear and mounted on a second shaft in a second axis parallel to said first and center axis; controlled camming means rotatably mounted in said center axis for controlling the selective engagement of said cross by said drive gear; means for coupling said control cam means to said drive gears and for insuring a time selective engagement of each said drive gears; and means for providing a continuous drive to both said first and second drive gears.

Claim 4

Shifting arrangement comprising: a Maltese cross rotatably mounted on a center axis; a first drive gear mounted on a first shaft in a first axis parallel to said center axis, said forward gear having means for indexing said cross in a first direction; a second drive gear engaging said first drive gear and mounted on a second shaft in a second axis parallel to said first and center axis; controlled camming means rotatably mounted in said center axis for controlling the selective engagement of said cross by said drive gear; means for coupling said control cam means to said drive gears and for insuring a time selective engagement of each said drive gears; and means for providing a continuous drive to both said first and second drive gears.

Claim 5

The arrangement of claim 2 wherein said means for coupling and insuring a time engagement includes a locking cam mounted on each of said shaft, said cam having a circumferential groove adapted to engage said control cam, and said cam having a locking slot portion positioned at another portion of its circumference for a predetermined amount.

Claim 6

The arrangement of claim 3 including means for mounting said control cam in a rotatable manner and for mounting said first and second shafts in a rotatably and axial movable manner.

Claim 7

The arrangement of claim 4 including a locking lever and means associated therewith to cause contact of said lever with said locking cam and thereby engage said locking slot portion to prevent axial movement of said drive gears during a predetermined portion of said locking cam.

Claim 8

The arrangement of claim 5 including means for selectively rotating said control cam means, whereby rotation of said control camming means causes axial movement of said first and second driving gears unless prevented by said locking lever during the predetermined portion of the rotation of said locking cam.

Claim 9

Shifting arrangement comprising: a Maltese cross; first and second rotating drive means for selectively engaging said cross to drive it in a forward and reverse direction; control cam means to control the selective engagement of said cross; first and second locking means respectively coupled to said first and second driving means and engaging said control means, said first and second locking means to insure the selective engagement of said first and second drive means and said cross only during predetermined portions of the rotation of said cross; and said first and second locking means each including a locking cam mounted on said drive means, said cam having a circumferential groove adapted to engage said control cam and a locking slot portion positioned at another portion of its circumference for a predetermined amount, and a locking lever and means associated therewith to cause contact of said lever with said locking cam and thereby engage said locking slot portion during a predetermined portion of the rotation of said locking cam.

Claim 10

Shifting arrangement comprising: a Maltese cross; first and second rotating drive means for selectively engaging said cross to drive it in a forward and reverse direction; control cam means to control the selective engagement of said cross; first and second locking means respectively coupled to said first and second driving means and engaging said control means, said first and second locking means to insure the selective engagement of said first and second drive means and said cross only during predetermined portions of the rotation of said cross; and said first and second locking means each including a locking cam mounted on said drive means, said cam having a circumferential groove adapted to engage said control cam and a locking slot portion positioned at another portion of its circumference for a predetermined amount, and a locking lever and means associated therewith to cause contact of said lever with said locking cam and thereby engage said locking slot portion during a predetermined portion of the rotation of said locking cam.

Claim 11

Shifting arrangement comprising: a Maltese cross rotatably mounted on a center axis; a continuously rotating first drive gear mounted on a first shaft in a first axis parallel to said center axis, said forward gear having pin means for indexing said cross in a first direction; a continuously rotating second drive gear engaging said first drive gear and mounted on a second shaft in a second axis parallel to said first and center axis; controlled camming means rotatably mounted in said center axis for controlling the selective engagement of said cross by one of said drive gears; means for coupling said control cam means to said drive gears and for insuring a time selective engagement of each said drive gears; and means coupled to one of said drive gears for providing a continuous drive to both said first and second drive gears.

Claim 12

Shifting arrangement comprising: a Maltese cross rotatably mounted on a center axis; a continuously rotating first drive gear mounted on a first shaft in a first axis parallel to said center axis, said forward gear having pin means for indexing said cross in a first direction; a continuously rotating second drive gear engaging said first drive gear and mounted on a second shaft in a second axis parallel to said first and center axis; controlled camming means rotatably mounted in said center axis for controlling the selective engagement of said cross by one of said drive gears; means for coupling said control cam means to said drive gears and for insuring a time selective engagement of each said drive gears; and means coupled to one of said drive gears for providing a continuous drive to both said first and second drive gears.

Claim 13

The arrangement of claim 8 wherein said means for coupling and insuring a time engagement includes: a locking cam mounted on each of said shafts, said cam having a circumferential groove attached to meet said control cam and a locking slot portion positioned at another portion of its circumference for a predetermined amount; and a locking lever and means associated therewith to cause abutment of said lever with said locking cam, whereby said locking slot portion is engaged to prevent axial movement of said drive gears during a predetermined portion of said locking cam.

Claim 14

The arrangement of claim 9 including means for selectively rotating said control cam means, whereby rotation of said control camming means causes axial movement of said first and second driving gears unless prevented by said locking lever during the predetermined portion of the rotation of said locking cam.