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  2. Spirograph - Wikipedia

    en.wikipedia.org/wiki/Spirograph

    Spirograph is a geometric drawing device that produces mathematical roulette curves of the variety technically known as hypotrochoids and epitrochoids. The well-known toy version was developed by British engineer Denys Fisher and first sold in 1965.

  3. Rose engine lathe - Wikipedia

    en.wikipedia.org/wiki/Rose_engine_lathe

    A rosette or cam-like pattern mounted on the spindle is controlled by moving against a cam follower(s) while the lathe spindle rotates. Rose engine work can make flower patterns, as well as convoluted, symmetrical, multi-lobed geometric patterns. The patterns it produces are similar to that of a Spirograph, in metal. No other ornamental lathe ...

  4. Guilloché - Wikipedia

    en.wikipedia.org/wiki/Guilloché

    The pattern used in this instance is called a spirograph in mathematics, that is, a hypotrochoid generated by a fixed point on a circle rolling inside a fixed circle. It has parametric equations. These patterns bear a strong resemblance to the designs produced on the Spirograph, a children's toy.

  5. Denys Fisher - Wikipedia

    en.wikipedia.org/wiki/Denys_Fisher

    Between 1962 and 1964 he developed various drawing machines from Meccano pieces, eventually producing a prototype Spirograph. Patented in 16 countries, it went on sale in Schofields department store in Leeds in 1965. A year later, Fisher licensed Spirograph to Kenner Products in the United States. In 1967 Spirograph was chosen as the UK Toy of ...

  6. Peter Hubert Desvignes - Wikipedia

    en.wikipedia.org/wiki/Peter_Hubert_Desvignes

    Peter Hubert Desvignes (born 29 April 1804, Constantinople, Ottoman Empire; died 27 December 1883 at Hither Green (today Lewisham), Kent, England) was a civil engineer, architect, and inventor.

  7. IC 418 - Wikipedia

    en.wikipedia.org/wiki/IC_418

    IC 418, also known as the Spirograph Nebula, is a planetary nebula located in the constellation of Lepus about 3,600 ly away from Earth. It spans 0.3 light-years across. The central star of the planetary nebula, HD 35914 , is an O-type star with a spectral type of O7fp. [ 4 ]

  8. Damaskeening - Wikipedia

    en.wikipedia.org/wiki/Damaskeening

    These patterns look similar to the results of a Spirograph or Guilloché engraving. The earliest known damaskeened American watch movement is E. Howard & Company movement SN 1,105, a gold-flashed brass movement with a helical hairspring.

  9. Lissajous curve - Wikipedia

    en.wikipedia.org/wiki/Lissajous_curve

    The pattern closes if the frequencies are whole number ratios i.e. ⁠ a / b ⁠ is rational. Another simple Lissajous figure is the parabola (⁠ b / a ⁠ = 2, δ = ⁠ π / 4 ⁠). Again a small shift of one frequency from the ratio 2 will result in the trace not closing but performing multiple loops successively shifted only closing if the ...