Motion conversion apparatus

Claim 2

Apparatus for converting uniform rotation of a drive shaft into rectilinear simple harmonic motion of a cross-head, said apparatus including: a crank member (37) offset from the axis (33a) of the drive shaft (33) and driven thereby in a circular path (60), a cross-head member (41) and guide means (42) therefor constraining the cross-head member to move rectilinearly along a diameter of said circular path of the crank member, and means connecting said crank and cross-head members comprising a linking member (46) pivotally joined to said cross-head member (41) and an arm (48) pivotally joined to said crank member, said arm and linking member being pivotally joined to each other on an axis (51a) which is offset equally from the pivotal axis (47a) of the junction of said linking member to the cross-head member and from the pivotal axis (37a) of the junction of said arm to the crank member, the ratio of the offset (x1) of the axis (51a) of pivotal junction of the arm and linking member to the offset (xc) of said crank member from the drive shaft axis (33a) being adjustably variable.

Claim 3

Apparatus for converting uniform rotation of a drive shaft into rectilinear harmonic motion of a cross-head, said apparatus including: a crank member (37) offset from the axis (33a) of the drive shaft (33) and driven thereby in a circular path (60), a cross-head member (41) and guide means (42) therefor constraining the cross-head member to move rectilinearly along a diameter of said circular path of the crank member, and means connecting said crank and cross-head members comprising a linking member (46) pivotally joined to said cross-head member and an arm (48) pivotally joined to said crank member, said arm and linking member being pivotally joined to each other on an axis (51a) which is offset equally from the pivotal axis (47a) of the junction of said linking member to the cross-head member and from the pivotal axis (37a) of the junction of said arm to the crank member, said arm being pivotally joined to a guide block (62) on an axis (61a) offset from the axis (51a) of pivotal junction of said arm and linking member a distance equal to the offset of said axis (51a) of pivotal junction of the arm and linking member from the pivotal axis (47a) of the junction of said linking member to the cross-head member, said guide block being constrained by said guide means to move rectilinearly in a path aligned with the path of motion of said cross-head member.

Claim 4

Apparatus for converting uniform rotation of a drive shaft into rectilinear harmonic motion of a cross-head, said apparatus including: a crank member (37) offset from the axis (33a) of the drive shaft (33) and driven thereby in a circular path (60), a cross-head member (41) and guide means (42) therefor constraining the cross-head member to move rectilinearly along a diameter of said circular path of the crank member, and means connecting said crank and cross-head members comprising a linking member (46) pivotally joined to said cross-head member and an arm (48) pivotally joined to said crank member, said arm and linking member being pivotally joined to each other on an axis (51a) which is offset equally from the pivotal axis (47a) of the junction of said linking member to the cross-head member and from the pivotal axis (37a) of the junction of said arm to the crank member, said arm being pivotally joined to a guide block (62) on an axis (61a) offset from the axis (51a) of pivotal junction of said arm and linking member a distance equal to the offset of said axis (51a) of pivotal junction of the arm and linking member from the pivotal axis (47a) of the junction of said linking member to the cross-head member, said guide block being constrained by said guide means to move rectilinearly in a path aligned with the path of motion of said cross-head member.

Claim 5

Apparatus as claimed in claim 2 in which said guide means includes a rectilinear guide rod extending freely through apertures in both said cross-head member and in said guide block.

Claim 6

Apparatus as claimed in claim 2 in which the magnitude of the offset of said crank member from said axis of rotation of the drive shaft is adjustable to vary the diameter of the circular path in which said crank member moves.

Claim 7

Apparatus as claimed in claim 2 in which said cross-head member carries a stator winding head.

Claim 8

Apparatus for converting uniform rotation of a drive shaft into rectilinear harmonic motion of a cross-head, said apparatus including: a crank member offset from the axis of rotation of the drive shaft and driven thereby in a circular path, an arm pivotally joined to said crank member adjacent one of its ends, a guide member pivotally joined to the opposite end of said arm on an axis parallel to the axis of pivotal juncture of said crank member and said arm, and a tracking element for said guide member constraining said guide member to move rectilinearly in a path which is an extension of a diameter of said circular path of the crank member, a linking member pivotally joined to said arm intermediate its end, the axis of pivotal juncture of said arm and linking member being parallel to and midway between the axis of pivotal juncture of said crank member and arm and the axis of pivotal juncture of said guide member and arm, and a cross-head member constrained to move along said diameter of the crank member path, said cross-head member being pivotally joined to said linking member on an axis spaced from the axis of pivotal juncture of said linking member and arm a distance equal to the distance between said axis of pivotal juncture of said linking member and arm and said axis of pivotal juncture of said guide member and arm, whereby upon uniform rotation of said drive shaft said cross-head member moves in rectilinear harmonic motion along said circular path diameter.

Claim 9

Apparatus for converting uniform rotation of a drive shaft into rectilinear harmonic motion of a cross-head, said apparatus including: a crank member offset from the axis of rotation of the drive shaft and driven thereby in a circular path, an arm pivotally joined to said crank member adjacent one of its ends, a guide member pivotally joined to the opposite end of said arm on an axis parallel to the axis of pivotal juncture of said crank member and said arm, and a tracking element for said guide member constraining said guide member to move rectilinearly in a path which is an extension of a diameter of said circular path of the crank member, a linking member pivotally joined to said arm intermediate its end, the axis of pivotal juncture of said arm and linking member being parallel to and midway between the axis of pivotal juncture of said crank member and arm and the axis of pivotal juncture of said guide member and arm, and a cross-head member constrained to move along said diameter of the crank member path, said cross-head member being pivotally joined to said linking member on an axis spaced from the axis of pivotal juncture of said linking member and arm a distance equal to the distance between said axis of pivotal juncture of said linking member and arm and said axis of pivotal juncture of said guide member and arm, whereby upon uniform rotation of said drive shaft said cross-head member moves in rectilinear harmonic motion along said circular path diameter.

Claim 10

Apparatus as claimed in claim 6 in which the offset distance of said crank member from the axis of rotation of the drive shaft is adjustable.

Claim 11

Apparatus as claimed in claim 6 in which said cross-head member carries a stator winding head.