Spring motor
AssigneeBarnes Group Inc.
InventorsDennis W. Martin, Tariq M. Afzal
Life of this patent
Estimating the term…
Abstract
A motor for controlling the elevating and lowering of a load comprises a storage drum, an output drum and a spring member operatively connected therebetween to provide a spring motor therewith, and a pair of cord drums aligned with and respectively adjacent the storage drum and the output drum. A gear train including an idler gear associated with the storage drum drivingly interengages the cord drums with the output drum, whereby the elevating and lowering of a load attached to the cords on the cord drums is balanced regardless of whether the elevating or lowering force is applied centrally between the points of attachment of the cords to the load.
Claims45
A motor comprising spring storage drum means having a first axis, an output drum rotatable about a second axis parallel to and spaced from said first axis, a spring member coiled on said storage drum means coaxial with said first axis and having a first end on said storage drum means and a free end connected to said output drum for rotation of said output drum in one direction about said second axis to wind said spring member thereon from said storage drum means and for said spring member to bias said output drum in the direction opposite said one direction to rewind said spring member on said storage drum means, said spring member having laterally opposite sides transverse to said first and second axes, said output drum including output drum drive means adjacent one of said sides of said spring member for rotating said output drum in said one direction about said second axis for winding said spring member on said output drum, control means laterally aligned with said drive means, and means interengaging said control means and said drive means for said control means to control rotation of said output drum in said one and opposite directions.
A motor comprising, a pair of parallel spaced apart support plates, a spring motor between said plates, said spring motor including storage drum means mounted between said plates and having a first axis transverse to said plates, an output drum mounted between said plates for rotation about a second axis parallel to and spaced from said first axis, and a return spring member operatively connecting said storage drum means and said output drum, drum gear means coaxial with said second axis and connected to said output drum for rotation therewith, idler gear means coaxial with said first axis and rotatable relative to said storage drum means, said drum gear means and idler gear means being in meshing interengagement, and control gear means mounted between said plates for rotation about a third axis parallel to and spaced from said first and second axes, said control gear means being in meshing interengagement with one of said drum gear means and idler gear means for controlling rotation of said output drum therethrough.
A motor comprising, support means including a pair of parallel spaced apart support plates having opposite ends, a plurality of spring motors in series between said ends, each said motor including storage drum means and an output drum arranged sequentially in the direction from one of said opposite ends toward the other and a return spring member operatively connecting said storage drum means and said output drum, said storage drum means and output drum being mounted between said support plates and having spaced apart axes transverse to said plates, at least said output drum being rotatable about its axis, rotatable gear train means drivingly interconnecting said plurality of spring motors for operation in unison, and control gear means in meshing interengagement with at least one of the gears in said gear train means for controlling rotation thereof.
Dependencies are inferred from the claim text.