Pendulum toy

Details Pendulum toy Pendulum toy

1975-10-20

1976-08-31

Phillips, Charles E.

Geometrical instruments

Scriber

Curved line

B43L 1100

Patent

active

039770850

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.

REFERENCES:
patent: 1869951 (1932-08-01), Worthington
patent: 3143807 (1964-08-01), Christie
patent: 3324556 (1967-06-01), Everett
patent: 3384966 (1968-05-01), Lias
patent: 3494037 (1970-02-01), Arber
patent: 3496641 (1970-02-01), Mills
patent: 3590488 (1971-07-01), Padowicz

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