x = (2 + cos 3t) cos 2t
y = (2 + cos 3t) sin 2t
z = sin 3t
for t between 0 and 2*Pi
These cufflinks were modelled by twisting a square profile around a curve defined by the equations above. The shaft is composed of three curved square beams that make contact with the three middle points of the Knot.
A beautiful mathematic set of cufflinks inspired by ones that I have and that were crafted by an expert artisan in Taxco, Mexico (home of expert jewellers and silversmiths). The difference is that those are composed by three intertwined rings while these are defined by a parametric equation.
A couple of curious facts about these:
- While touching one face, it takes four full turns around the axis to return to the starting position. That means that this knot is also a Möbius Strip and therefore is a solid with only one surface and one edge.
- One cufflink is the mirror image of the other, but they are not topologically identical. That means that one can not be deformed into the other. Therefore there is a right-hand knot and a left-hand knot (Chirality).
The great thing about these is that they won't look cheesy on the outside, as they will appear to be plain cylinders with some rings removed.
Discrete and low profile, yet classy. Ideal for fashionable mechanical engineers.
The shape, defined by an ever growing circular profile swept around a spiral that widens exponentially, is driven by the following parametric equations:
x = (k^u)(1+cos v)(cos u)
y = (k^u)(1+cos v)(sin u)
z = (k^u)(sin v) - a (k^u)
The earrings are a mirror image of each other and have been hollowed out in order to save material and to resemble a seashell. The holes, where the hook's ring is to be attached, lie on the same y coordinate as the model's center of mass, thus being intended to hang in the upright position with no tilting (i.e. as seen on the renderings). Right now the hooks are NOT included.
To get these along with the Golden Spiral Pendant:
Codex Atlanticus f. 30 v. Leonardo da Vinci
Working "reciprocating motion machine" model. Inspired by one of Leonardo's designs for converting a reciprocating motion into continuous motion. By moving the lever back and forth, a line winds up in the shaft with the "lantern gear" which can be used for lifting weights.
The set does NOT come assembled, mainly because I wanted to have pre-loaded springs for the ratchets, and because I didn't want to sacrifice it with relatively large clearances.
The model consists of 23 parts plus one spare pin and a spare ratchet. Assembling it should be very straightforward, the only consideration is that the pins are slightly conical in order to properly lock the components, and thus have just one correct orientation in their corresponding conical holes. The base itself has a plate with the machine's name in italian written in a blackletter typeface and Leonardo's name written in a font inspired by his very own handwriting.
Besides the components of this set, a thin cord and a weight are required to complete the model. I've added an optional weight in the following link. This model is perfect as a desktop toy or as a nice working sculpture in a bookshelf.
I hope that this will be the first model in a series of machines inspired by Leonardo's work.
Besides looking nice, it will keep the chopsticks or knifes from touching the table or mantelpiece crawling with crumbles.
With their elliptic shafts and hemisphere studs, these cufflinks will make a perfect gift for any Star Wars geek.
With its twelve faces - two of them being parallel to the shirt's surface - it will look great for any ocassion. Not even the point where the shaft intersects the dodecahedron makes them look odd, as it has been hollowed out with a pentagonal hole that gets smaller as it runs through the shaft.
Hollow and beautifully simple, great for any geometry fan.
It requires two D1/4" x 1/16" neodymium magnets such as the D41-N52, which can be found in: KJ Magnetics. The magnets must be glued to the corresponding bores in both pieces in order to wear them.This product includes only ONE earring, to purchase two, you must add a second one to your cart. Just select the type of material from the options below to add them to your cart, the different material options and finishes (i.e. Silver vs Silver Glossy) can be changed during check-out.
Codex B (2173), c.83v. Leonardo da Vinci
A working model inspired by Leonardo's "Aerial Screw", the first attempt ever to design a helicopter. Designed by Leonardo to "spiral up in the air".
The set comes assembled and consists of two parts (stator and rotor) and a base. The base contains a plate with the machine's name in italian written in a blackletter typeface and Leonardo's name written in a font inspired by his very own handwriting.
This beautiful object contains all five Platonic Solids circumscribed one inside the other, from the icosahedron to the tetrahedron (ordered by the number of faces), with a wireframe sphere in it's core.
It can make a nice desktop sculpture or a hanging ornament - it will look great in a christmas tree.
I have a real piston converted into an ashtray by means of machining, so I thought that this would make an interesting addition to my products.
Upload a picture of your family's crest and optionally upload your family name to be engraved in the back face of the crest. If no name is uploaded, the cufflinks will have no engraving on the back, even if the family name is in the picture.
The original mask was cast from the composer's face in 1812 and is often mistaken to be his Death Mask (although the differences between both are quite obvious).
With a pedestal, and being 10 cm (4") high, it is intended to sit on top of a piano or bookshelf to show our devotion to this great genius. The model has been hollowed out to save material and lower the price.Because ceramic printing costs are based in surface area while all other materials are based in volume, you can purchase a solid (non-hollow) model here:
The coat of arms contains five Azure (Blue) Fleurs-de-lis, bordered by a double order in Argent (Silver) and Gules (Red). Engraved on the back is the family name, Arce (or Maple in english), in a Blackletter or gothic typeface.
Attach a bended copper or steel wire – or just tie a string directly – in the existing hole to make it hang from the machine. Perfect in a rough finished stainless steel or antique bronze glossy.
The Coat of Arms contains, on top of Or (gold), a Vert (green) tree with two Sable (black) wolves leaning on it's trunk. The Azure (blue) bordure contains three Sable cauldrons.
The last name (De la Borbolla) is engraved in the back with a gothic typeface.
Although being an impossible shape, this cufflinks are intended to generate an optic illusion to make the observer see the Penrose triangle when seen from the right angle.
It only takes a coupe of leather straps to attach it to a sweater or coat.
The crest has, on top of Azure (blue), four Fleurs de Liz in Or (gold) and a Swan in Argent (silver) with membrado and pitting in Or.
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