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US 3,977,085 AGranted
Pendulum toy
OwnerRobert L. Sandiferinventor
Life of this patent
Estimating the term…
Abstract
A pendulum toy using a drawing pen, for making a variety of arcuate designs such as curves, spirals, and cycloids on a work sheet positioned on the surface of the top of a table.
Claims11
A pendulum toy using a marking instrument for making a variety of designs on a work sheet positioned on a planar horizontal surface of a table, the toy comprising:
- a first and second pendulum rod pivot means positioned on the horizontal surface of the table:
- a first and second pendulum rod pivotally supported on said first and second pivot means;
- said first and second pendulum rods having a vertically positioned first end portion, a vertically positioned second end portion, and a center portion, the first end portion positioned above said horizontal surface of the table and seated in said pivot means, the second end portion positioned below the horizontal surface of the table, said center portion connecting said first and second end portions and therefore extending plane;
- an edge of said planar surface with enough clearance to allow pivoting of said pendulum rods in a vertical plane:
- a first and second pendulum weight attached to the second end portions of said first and second pendulum rods substantially directly below said pendulum rod pivot means;
- a first connecting rod pivotally attached to the first end portion of said first pendulum rod;
- a second connecting rod pivotally attached to the first end portion of said second pendulum rod;
- a pen holder attached to said first and second connecting rods, said pen holder holding a pen for drawing designs on the work sheet.
5 more elements
A pendulum toy using a marking instrument for making a variety of designs on a work sheet positioned on a horizontal top of a table, the toy comprising:
- a first and second stirrup, said stirrup having a U-shaped stirrup frame, the ends of the U-shaped stirrup frame pivotally attached to a stirrup base, the stirrup base disposed on top of the table and adjacent the edge thereof;
- a first and second pendulum rod having a vertically positioned first end portion, a vertically positioned second end portion, and an annular shaped center portion adjacent the edge of the table and disposed therearound with enough clearance to allow pivoting of said pendulum rods in a vertical plane, the first end portion positioned above the edge of the table, the second end portion positioned below the edge of the table, a portion of the first end portion attached to said stirrup frame, said first and second pendulum rods pivoted on said stirrups in a vertical plane perpendicular to the horizontal plane of the table;
- a first and second pendulum weight attached to the second end portion of said first and second pendulum rods and positioned substantially directly below said first and second stirrups;
- a first and second universal joint pivotally attached to the first end portion of said first and second pendulum rods;
- a first and second connecting rod horizontally balanced on said first and second universal joint and pivotally attached thereto, said connecting rods coacting with the movement of said pendulum rods and pivoting in a horizontal plane parallel to the horizontal plane of the table;
- and
- a pen holder attached to said first and second connecting rods, said pen holder holding a pen for drawing designs on the work sheet.
4 more elements
Dependencies are inferred from the claim text.