Talk:Compass (drafting)

Article title

Am I the only one who finds it hard to accept that this is a "compass". I've always called them "compasses" and I'm sure I always will be a complete fuckwit. —Preceding unsigned comment added by 80.195.204.144 (talk • contribs)

Its actually a 'pair of compasses' I was taught in school!--Light current 23:22, 19 September 2005 (UTC)

I agree, this is like calling the trousers article 'trouser'. Joffeloff 19:31, 29 June 2006 (UTC)

Yes, agreed, can we have this article changed (busy - will have to come back to it if Light Current can't do it) so that the page title refers to Pair of Compasses? Other lazy titles can be referenced in the article. Kiwichipster 03:43, 9 August 2006 (UTC)

Done. -- scwimbush 16:08, 20 May 2007 (UTC)

This move brought this whole discussion to my attention. I've never heard the phrase "pair of compasses". I've always heard this called a compass. What is the geographic provenance of those who call it a pair of compasses? Michael Hardy 22:35, 10 June 2007 (UTC)

a.u.e. discussion

I've queried about the terminology on alt.usage.english. What I've found so far is this:

• Various people in North America say they've always heard it called a compass and never a pair of compasses.
• One person in India says in India it's called a compass and not a pair of compasses.
• One person in Australia says in Australia it's called a compass and never a pair of compasses.
• Several people in England say they learned in school in the '40s, '60s, or '70s to call it a compass, not a pair of compasses.
• Several people in England say they've frequently heard both terms and usually call it a compass and think others in England do the same.
• Several people in England say they learned in school to call it a pair of compasses and they've heard both terms.
• Several people in England say they've always heard it called a pair of compasses and never a compass.

Michael Hardy 20:27, 11 June 2007 (UTC)

... and now both terms appear in the article with a note on geographic variations. Michael Hardy 02:06, 26 June 2007 (UTC)

Based on its etymology, "a pair of compasses" makes no sense. Every single mathematician I have met calls it a "compass" in both English and Spanish. Other sources confirm this: naval usage never calls the instrument "a pair" in the UK or the USA. Sings-With-Spirits (talk) 23:38, 26 February 2009 (UTC)

Dividers

And aren't they also called "dividers"?

Yes, in sheet metal work they are called dividers.

Are you referring to "compass, also called a pair of compasses" or to the variant called scribe(compass)? If you are referring to the scribe(compass) I can add your section in to read "in sheet metal work they are called dividers"--Johnalden 01:28, 23 January 2007 (UTC).

Technically Dividers are pretty much compasses with two points which are different from scribes in metal work as you can use them to measure withouth leaving the pencil mark of a pair of compasses. If you have a map - you probably will never use a compass - but dividers instead! Kirsty Mason —Preceding unsigned comment added by 212.44.31.27 (talk) 11:24, 16 September 2009 (UTC)

Basic Construction: Parallel lines

Here is a site that describes the process: http://www.mathopenref.com/constparallel.html Omegamormegil (talk) 20:32, 25 September 2010 (UTC)

helical model

i need model of helical baffle for project work —Preceding unsigned comment added by 210.212.230.146 (talk) 06:36, 28 January 2011 (UTC)

Geometrical construction

I rm a section containing a brief description of the geometric method of bisecting a line. I see here too, on talk, mention of a method of drawing parallel lines. These topics have no place in this article.

This article describes a physical object, a tool that is commonly used for drawing what are commonly called "circles"; and are circles in the commonly-understood sense: round marks on paper or film. This is not a trivial or silly subject but it is only loosely related to geometry. The latter deals with the abstract and perfect circle; and the compass used to create it is purely imaginary. Both subjects have value; but they are distinct. Both are treated poorly when they are mashed together.

Please, do not insert into this article descriptions of geometric constructions. If you wish to enlarge anyone's understanding of the physical tool, by all means, explain how it may be used. — Xiong熊talk* 07:19, 5 March 2011 (UTC)

Galileo

A bot that is supposed to be programmed to create wikilinks inserted the unsourced claim that Galileo invented the compass. An IP user "corrected" the date of this invention to 1597. You can plainly see a 13th century French monk in this article using a compass. Further investigation shows, in the Galileo article, as well as the Galileo Museum site, that Galileo did not invent the compass, but a specific type of military compass. The museum site specifically states that "The Galilean compass [is] not to be confused with drawing compasses[.]" Further, Sector (instrument) suggests that Galileo's version was not necessarily unique and therefore some credit Thomas Hood with its invention. This is what the barest of research shows. I am removing the spurious line with a direction to this talk page if any discussion is merited, but you can see that the wanted credit already appears where it belongs, at Sector (instrument). Rifter0x0000 (talk) 19:58, 3 June 2011 (UTC)