Shift lever device for speed change gear transmission train of a bicycle

Claim 2

In a device for shifting first and second sets of speed change gear transmission trains, of a bicycle having a frame, and including a first speed changing cable connected at one end to the first train and a second speed changing cable connected at one end to the second train, an improved shift lever device comprising, in combination, a shift lever connected to the opposite end of said first cable and operatively mounted on siad frame for pivoting about a first axis, to effect linear movement of said first cable, and for angular displacement about a second axis perpendicular to said first axis; means connected to the opposite end of said second cable and operable by said shift lever, responsive to angular displacement of said shift lever, to effect linear movement of said second cable; said last-named means comprising a drum mounted rotatably on a shaft supported on a clamp secured to the bicycle frame; said shift lever being oscillatable on a pivot extending radially from said drum; said drum having a groove in its outer periphery extending at an angle to its axis; a slotted rectilinear guide adjacent and extending parallel to said drum; and a slide having a first projection engaged in said groove and a second projection engaged in said slide and connected to the opposite end of said second speed changing cable.

Claim 3

In a device for shifting first and second sets of speed change gear transmission trains, of a bicycle having a frame, and including a first speed changing cable connected at one end to the first train and a second speed changing cable connected at one end to the second train, an improved shift lever device comprising, in combination, a shift lever connected to the opposite end of said first cable and operatively mounted on said frame for pivoting about a first axis, to effect linear movement of said first cable, and for angular displacement about a second axis perpendicular to said first axis; means connected to the opposite end of said second cable and operable by said shift lever, responsive to angular displacement of said shift lever, to effect linear movement of said second cable; said last-named means comprising a drum mounted rotatably on a shaft supported on a clamp secured to the bicycle frame; said shift lever being oscillatable on a pivot extending radially from said drum; said drum having an inclined end surface; and an arm pivotally mounted on said frame intermediate its ends and having an end engaged with said inclined end surface at a point spaced from the axis of said drum; the opposite end of said arm being connecteD to said second speed changing cable.

Claim 4

In a device for shifting first and second sets of speed change gear transmission trains, of a bicycle having a frame, and including a first speed changing cable connected at one end to the first train and a second speed changing cable connected at one end to the second train, an improved shift lever device comprising, in combination, a shift lever connected to the opposite end of said first cable and operatively mounted on said frame for pivoting about a first axis, to effect linear movement of said first cable, and for angular displacement about a second axis perpendicular to said first axis; means connected to the opposite end of said second cable and operable by said shift lever, responsive to angular displacement of said shift lever, to effect linear movement of said second cable; said last-named means comprising a drum mounted rotatably on a shaft supported on a clamp secured to the bicycle frame; said shift lever being oscillatable on a pivot extending radially from said drum; said drum having an inclined end surface; and an arm pivotally mounted on said frame intermediate its ends and having an end engaged with said inclined end surface at a point spaced from the axis of said drum; the opposite end of said arm being connecteD to said second speed changing cable.

Claim 5

In a device for shifting first and second sets of speed change gear transmission trains, of a bicycle having a frame, and including a first speed changing cable connected at one end to the first train and a second speed changing cable connected at one end to the second train, an improved shift lever device comprising, in combination, a shift lever connected to the opposite end of said first cable and operatively mounted on said frame for pivoting about a first axis, to effect linear movement of said first cable, and for angular displacement about a second axis perpendicular to said first axis; means connected to the opposite end of said second cable and operable by said shift lever, responsive to angular displacement of said shift lever, to effect linear movement of said second cable; said last-named means comprising a drum mounted rotatably on a shaft supported on a clamp secured to the bicycle frame; said shift lever being oscillatable on a pivot extending radially from said drum; a fork extending radially from said drum in angularly spaced relation to said pivot for said shift lever; and a bell crank pivotally mounted on said frame and having a first arm embraced by said fork and a second arm connected to the opposite end of said second speed changing cable.

Claim 6

In a device for shifting first and second sets of speed change gear transmission trains, of a bicycle having a frame, and including a first speed changing cable connected at one end to the first train and a second speed changing cable connected at one end to the second train, an improved shift lever device comprising, in combination, a shift lever connected to the opposite end of said first cable and operatively mounted on said frame for pivoting about a first axis, to effect linear movement of said first cable, and for angular displacement about a second axis perpendicular to said first axis; means connected to the opposite end of said second cable and operable by said shift lever, responsive to angular displacement of said shift lever, to effect linear movement of said second cable; said last-named means comprising a drum mounted rotatably on a shaft supported on a clamp secured to the bicycle frame; said shift lever being oscillatable on a pivot extending radially from said drum; a fork extending radially from said drum in angularly spaced relation to said pivot for said shift lever; and a bell crank pivotally mounted on said frame and having a first arm embraced by said fork and a second arm connected to the opposite end of said second speed changing cable.

Claim 7

In a device for shifting first and second sets of speed change gear transmission trains, of a bicycle having a frame, and including a first speed changing cable connected at one end to the first train and a second speed changing cable connected at one end to the second train, an improved shift lever device comprising, in combination, a shift lever connected to the opposite end of said first cable and operatively mounted on said frame for pivoting about a first axis, to effect linear movement of said first cable, and for angular displacement about a second axis perpendicular to said first axis; means connected to the opposite end of said second cable and operable by said shift lever, responsive to angular displacement of said shift lever, to effect linear movement of said second cable; said last-named means comprising a first bevel gear rotatably mounted on the shaft supported on the clamp secured to the frame of the bicycle; said shift lever being oscillatable on a pivot extending radially from said bevel gear; and a second bevel gear meshing with said first-mentioned bevel gear and mounted on the frame of the bicycle for rotation about an axis perpendicular to the axis of rotation of said first-mentioned bevel gear; the opposite end of said second speed changing cable being connected to the periphery of said second bevel gear.

Claim 8

In a device for shifting first and second sets of speed change gear transmission trains, of a bicycle having a frame, and including a first speed changing cable connected at one end to the first train and a second speed changing cable connected at one end to the second train, an improved shift lever device comprising, in combination, a shift lever connected to the opposite end of said first cable and operatively mounted on said frame for pivoting about a first axis, to effect linear movement of said first cable, and for angular displacement about a second axis perpendicular to said first axis; means connected to the opposite end of said second cable and operable by said shift lever, responsive to angular displacement of said shift lever, to effect linear movement of said second cable; said last-named means comprising a first bevel gear rotatably mounted on the shaft supported on the clamp secured to the frame of the bicycle; said shift lever being oscillatable on a pivot extending radially from said bevel gear; and a second bevel gear meshing with said first-mentioned bevel gear and mounted on the frame of the bicycle for rotation about an axis perpendicular to the axis of rotation of said first-mentioned bevel gear; the opposite end of said second speed changing cable being connected to the periphery of said second bevel gear.