Vintage Compass Protractor 5" W Black Pedigree Crayon

US $9.99

Madison, Wisconsin, United States
Jun 3rd

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Vintage Compass Protractor 5" Compass style Protractor. No makers marks beyond "Made in Japan". The pencil reads Pedigree Crayons - USA - Black. Shipped with USPS First Class Mail Service. **Please note all sales are final. There are no returns, trades, or exchanges permitted. Please review photos closely as they are part of the item description. Described to the best of my abilities. Feel free to message me for additional details. The winning buyer is asked to please make payment within 3 days of winning this sale. Thank you! Compass (drawing tool) A beam compass and a regular compass Using a compass A compass with an extension accessory for larger circles A bow compass capable of drawing the smallest possible circles A compass, also known as a pair of compasses, is a technical drawing instrument that can be used for inscribing circles or arcs. As dividers, they can also be used as tools to measure distances, in particular on maps. Compasses can be used for mathematics, drafting, navigation and other purposes. Prior to computerization, compasses and other tools for manual drafting were often packaged as a set[1] with interchangeable parts. By the mid-twentieth century, circle templates supplemented the use of compasses.[citation needed] Today these facilities are more often provided by computer-aided design programs, so the physical tools serve mainly a didactic purpose in teaching geometry, technical drawing, etc. Construction and parts Compasses are usually made of metal or plastic, and consist of two "legs" connected by a hinge which can be adjusted to allow changing of the radius of the circle drawn. Typically one leg has a spike at its end for anchoring, and the other leg a drawing tool such as a pencil or sometimes a pen. Handle The handle is usually about half an inch long. Users can grip it between their pointer finger and thumb. Legs There are two types of legs in a pair of compasses: the straight or the steady leg and the adjustable one. Each has a separate purpose; the steady leg serves as the basis or support for the needle point, while the adjustable leg can be altered in order to draw different sizes of circles. Hinge The screw on the hinge holds the two legs in its position; the hinge can be adjusted depending on desired stiffness. The tighter the screw, the better the compass’ performance. Needle point The needle point is located on the steady leg, and serves as the center point of circles that have to be drawn. Pencil lead The pencil lead draws the circle on a particular paper or material. Alternatively, an ink nib or attachment with a technical pen may be used. Adjusting nut This holds the pencil lead or pen in place. Uses Circles can be made by fastening one leg of the compasses into the paper with the spike, putting the pencil on the paper, and moving the pencil around while keeping the hinge on the same angle. The radius of the circle can be adjusted by changing the angle of the hinge. Distances can be measured on a map using compasses with two spikes, also called a dividing compass. The hinge is set in such a way that the distance between the spikes on the map represents a certain distance in reality, and by measuring how many times the compasses fit between two points on the map the distance between those points can be calculated. Compasses and straightedge Compasses-and-straightedge constructions are used to illustrate principles of plane geometry. Although a real pair of compasses is used to draft visible illustrations, the ideal compass used in proofs is an abstract creator of perfect circles. The most rigorous definition of this abstract tool is the "collapsing compass"; having drawn a circle from a given point with a given radius, it disappears; it cannot simply be moved to another point and used to draw another circle of equal radius (unlike a real pair of compasses). Euclid showed in his second proposition (Book I of the Elements) that such a collapsing compass could be used to transfer a distance, proving that a collapsing compass could do anything a real compass can do. Variants A beam compass is an instrument with a wooden or brass beam and sliding sockets, or cursors, for drawing and dividing circles larger than those made by a regular pair of compasses.[2] Scribe-compasses[3] is an instrument used by carpenters and other tradesmen. Some compasses can be used to scribe circles, bisect angles and in this case to trace a line. It is the compass in the most simple form. Both branches are crimped metal. One branch has a pencil sleeve while the other branch is crimped with a fine point protruding from the end. A wing nut on the hinge serves two purposes: first it tightens the pencil and secondly it locks in the desired distance when the wing nut is turned clockwise. Loose leg wing dividers[4] are made of all forged steel. The pencil holder, thumb screws, brass pivot and branches are all well built. They are used for scribing circles and stepping off repetitive measurements[5] with some accuracy. A proportional compass, also known as a military compass or sector, was an instrument used for calculation from the end of the sixteenth century until the nineteenth century. It consists of two rulers of equal length joined by a hinge. Different types of scales are inscribed on the rulers that allow for mathematical calculation. A reduction compass is used to reduce or enlarge patterns while conserving angles. Compass variants Keuffel & Esser Arrow beam compass set for drafting. proportional compass 18th-century ellipse-drawing compass (MHS Geneva) Simple reduction compass (MHS Geneva). Sliding-pivot reduction compass by Nairne on London, 18th century (MHS Geneva). As a symbol A computer drawn compass, used to symbolize precise designing of applications. A pair of compasses is often used as a symbol of precision and discernment. As such it finds a place in logos and symbols such as the Freemasons' Square and Compasses and in various computer icons. English poet John Donne used the compass as a conceit in "A Valediction: Forbidding Mourning" (1611). Compass for tracing a line. Flat branch, pivot wing nut, pencil sleeve branch of the scribe-compass. 6 inch (15 cm) dividers made from forged steel. One type of sector. A compass on the former National Emblem of East Germany (former German Democratic Republic). The compass is a Masonic symbol that appears on jewellery such as this pendant. See also icon Mathematics portal Dividers Circle Geometrography Masonic Square and Compasses Technical drawing tools AS ADVERTISED: BACK TO SCHOOL 1962 As serendipity would have it, a ratty and tatty August 31, 1962 Life magazine crossed my path just as the big yellow school buses started rumbling around town. Although the magazine was destined to be recycled because of condition, one couldn’t help but flip through it once to see the back to school advertisements. Which of course had to be shared. Keeping it Clean vintage back to school ad Self service dry-cleaning at the laundromat? Sounds too good to be true. And, alas, apparently it was. vintage back to school ad A bit of what was probably considered witty poetry meant to point out of the benefits of “Sanforized” clothing. Verse 2: “So Mama grabbed her by the hair/And dragged her into town…” And image 5 has Mama wearing a dunce cap for doing the laundry badly. This is just a guess, but I don’t think any Mamas were involved in the making of this ad. Art Projects Ahead vintage back to school ad Pedigree Pencil Crayons in 60 colors! Don’t mind I do. (But what I really loved were the double-ended colored pencils). back to school ad I can’t imagine a world without Scotch Magic Tape. Next to duct tape, it is my second favorite construction and repair material. Imagine seeing it for the first time. It was a brand new thing in 1962, offering an alternative to cellophane tape. (Side story: How it came to be called Scotch isn’t all that pretty. “Scotch” was a pejorative name for someone who was excessively thrifty back in the 1920s. When a user was dissatisfied with the amount of adhesive on the newly introduced cellophane tape back in the 1930s, he suggested the inventor go back to his Scotch (tightwad) bosses and add more glue. The name stuck.*) Take Notes vintage school ad I always loved Lindy pens, and it had everything to do with the seal on the pocket clip. And the colors. And the way they wrote. They’ve disappeared from the writing world, but collectors still love them, even the non-working ones. vintage school ads It’s a cool idea, angle the tip of a ball point pen so you don’t have to hold the pen upright to make the ink flow–that’s the Scripto Tilt-Tip. Like the Lindy, the Tilt-top hopped away into history, although Scripto is still selling their pens and pencils. What were your favorite school supplies that have disappeared from the market? And which ones continue to be your favorites to this day? *Yes, this was a groan-worthy pun, but I have zero regrets about making it.

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Country/Region of Manufacture

United States

Protractor Type

Compass

UPC

Does not apply