Spirograph Jr.

Product Information

The kit features a high quality, durable carrying case with snap-in storage and a built-in drawing surface. The precision engineered Spirograph gears work with the three design pens included in the set as well as with most standard pens, felt tips and pencils. The other extreme case k = 1 {\displaystyle k=1} corresponds to the inner circle C i {\displaystyle C_{i}} 's radius r {\displaystyle r} matching the radius R {\displaystyle R} of the outer circle C o {\displaystyle C_{o}} , i.e. r = R {\displaystyle r=R} . In this case the trajectory is a single point. Intuitively, C i {\displaystyle C_{i}} is too large to roll inside the same-sized C o {\displaystyle C_{o}} without slipping. The original US-released Spirograph consisted of two differently sized plastic rings (or stators), with gear teeth on both the inside and outside of their circumferences. Once either of these rings were held in place (either by pins, with an adhesive, or by hand) any of several provided gearwheels (or rotors)—each having holes for a ballpoint pen—could be spun around the ring to draw geometric shapes. Later, the Super-Spirograph introduced additional shapes such as rings, triangles, and straight bars. All edges of each piece have teeth to engage any other piece; smaller gears fit inside the larger rings, but they also can rotate along the rings' outside edge or even around each other. Gears can be combined in many different arrangements. Sets often included variously colored pens, which could enhance a design by switching colors, as seen in the examples shown here. Most Spirograph sets have plastic wheels, but there are a few out there with metal wheels. Of course, metal is more durable than plastic, but metal is heavier to carry, and sets with metal wheels usually have fewer wheels for the price. Fisher 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 the Year.

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His company, Denys Fisher Toys, was sold to Palitoy in 1970 which was then bought by Hasbro . Through the 1980s and 1990s, Fisher continued to work with Hasbro in developing new toys and refining Spirograph. It has since been sold by Kahootz toys, and most recently, Playmonster. This is most likely where you’ve heard about Spirograph as it is today: Denys Fisher was an English engineer who invented the plastic spirograph toy that we know and love. Drawing toys based on gears have been around since at least 1908, when The Marvelous Wondergraph was advertised in the Sears catalog . An article describing how to make a Wondergraph drawing machine appeared in the Boys Mechanic publication in 1913. Includes: 10 piece travel version of Spirograph with built-in design ring, work surface and storage, 2 pens, 6 wheels, travel-sized paper sheets and details guide

Linderman, Jim. "ArtSlant - Spirograph? No, MAGIC PATTERN!". artslant.com . Retrieved 17 July 2011. The Original Spirograph Deluxe Set features all the iconic wheels and rings of the original, re-engineered and updated for today. Choose a precision ring, a precision wheel and a pen colour, then go round and round to create your design. While I can’t pinpoint exactly who invented the Spirograph, I found out about spiral drawing devices as the inspiration behind the toy. Popular in the late 18th century, these spiral devices used a rotating pencil to create spiralling patterns. Although they don’t look like a Spirograph and weren’t as popular, they were the first device to ever use a worm to create line patterns.

11 of the best Spirograph sets - Gathered

The parameter 0 ≤ l ≤ 1 {\displaystyle 0\leq l\leq 1} represents how far the point A {\displaystyle A} is located from the center of C i {\displaystyle C_{i}} . At the same time, 0 ≤ k ≤ 1 {\displaystyle 0\leq k\leq 1} represents how big the inner circle C i {\displaystyle C_{i}} is with respect to the outer one C o {\displaystyle C_{o}} .

In 1827, Greek-born English architect and engineer Peter Hubert Desvignes developed and advertised a "Speiragraph", a device to create elaborate spiral drawings. When working in Vienna between 1845 and 1848, Desvignes constructed a version of the machine that would help prevent banknote forgeries, as any of the nearly endless variations of roulette patterns that it could produce were extremely difficult to reverse engineer. The mathematician Bruno Abakanowicz invented a new Spirograph device between 1881 and 1900, which was used for calculating an area delimited by curves.