Plummet Posted April 10, 2014 Share Posted April 10, 2014 Someone recommended some kit from Proops Brothers, and browsing their site I found these They looked cheap and interesting, so I added them to my order. (From http://www.proopsbrothers.com/acatalog/Online_Catalogue_Gauges_55.html ) Here they are. So I tried to measure something, and the numbers on the scale did non make a lot of sense. I contacted Proops Brothers, and got the explanatory reply:- Hello Scale is in mm. Proops Funny millimetres! Here I am measuring the thickness of a small engineer's square. And the gauge reading! http://www.proopsbrothers.com/acatalog/Online_Catalogue_Gauges_55.html I read that as 44 somethings. How thick is the square? Using my trusty Aldi verniers - and yes, I did zero them first - we get 8.51mm. Can anyone provide sanity? Plummet Edited By Plummet on 10/04/2014 14:53:55 Edited By Plummet on 10/04/2014 14:56:27 Quote Link to comment Share on other sites More sharing options...
Depron Daz Posted April 10, 2014 Share Posted April 10, 2014 That gauge is for measuring wheel rims on push bikes. Not sure how they decipher the measurements, but they use them to measure the thickness on rims for wear. Quote Link to comment Share on other sites More sharing options...
Bob Cotsford Posted April 10, 2014 Share Posted April 10, 2014 so it's reading around 50 times - could it be reading radius for circular objects (/10 ie not 44 but 4.4) but not very accurately. Maybe someone has a use for radius rather than diameter, God knows who that is though. Maybe it's milli-cubits? Quote Link to comment Share on other sites More sharing options...
Antiquated Posted April 10, 2014 Share Posted April 10, 2014 I think it is related to this: **LINK** But 44/8.5 is approximately 5.18, a strange number. Quote Link to comment Share on other sites More sharing options...
cymaz Posted April 10, 2014 Share Posted April 10, 2014 Its a cycle rim measure HERE Quote Link to comment Share on other sites More sharing options...
Martyn K Posted April 10, 2014 Share Posted April 10, 2014 According to the eBay link, 1 point on the scale should equal 0.188 mm (2.256/12) so multiply that by 44 points and you get 8.272mm - near - but not right.. It must be faulty - send it back. Martyn Edited By Martyn K on 10/04/2014 16:15:00 Quote Link to comment Share on other sites More sharing options...
Plummet Posted April 10, 2014 Author Share Posted April 10, 2014 Posted by Antiquated on 10/04/2014 15:45:11: I think it is related to this: **LINK** But 44/8.5 is approximately 5.18, a strange number. All is revealed. It is an old (pre-1875 ) French tool for measuring "points". "And what do points mean?" Plummet Edited By Plummet on 10/04/2014 16:25:10 Quote Link to comment Share on other sites More sharing options...
C Norton Posted April 10, 2014 Share Posted April 10, 2014 All is revealed. It is an old (pre-1875 ) French tool for measuring "points". "And what do points mean?" Plummet Edited By Plummet on 10/04/2014 16:25:10 Errrrm prizes? Somebody had to say it..... Edited By C Norton on 10/04/2014 16:53:00 Quote Link to comment Share on other sites More sharing options...
Toni Reynaud Posted April 10, 2014 Share Posted April 10, 2014 Points relates to the height of typeface. "Point size is a typography size, On computers, a point (pt) is usually 1/72 of an inch, or about 3 point/mm (2.834!) " Quote Link to comment Share on other sites More sharing options...
Plummet Posted April 10, 2014 Author Share Posted April 10, 2014 Um... 0.188 mm according to Antiquated's link above. Doing the sums from my measurements... (See the piccies above.) 8.51 / 44 = 0.193 mm = 1 division Now 1 inch = 25.4mm 1/72 of an inch is 25.4 / 72 = 0.35 mm So I think my gauge is nearer to the defunct french units than the current printing units. (0.188 cf. 0.193) Should we start a campaign to persuade RCM&E to add dimensions in pieds, pouces, lignes and points? Plummet Quote Link to comment Share on other sites More sharing options...
The Wright Stuff Posted April 10, 2014 Share Posted April 10, 2014 You could try turning it off and then on again! Quote Link to comment Share on other sites More sharing options...
Plummet Posted April 10, 2014 Author Share Posted April 10, 2014 Posted by The Wright Stuff on 10/04/2014 19:31:52: You could try turning it off and then on again! That was my first thought. I couldn't find the switch! Plummet Quote Link to comment Share on other sites More sharing options...
Biggles' Elder Brother - Moderator Posted April 10, 2014 Share Posted April 10, 2014 Posted by The Wright Stuff on 10/04/2014 19:31:52: You could try turning it off and then on again! You can always spot the system software writers amongst us. BEB Quote Link to comment Share on other sites More sharing options...
Tony K Posted April 10, 2014 Share Posted April 10, 2014 Pedant alert! The correct name is "douzieme gauge". Quote Link to comment Share on other sites More sharing options...
Plummet Posted April 10, 2014 Author Share Posted April 10, 2014 Posted by Tony K on 10/04/2014 22:21:22: Pedant alert! The correct name is "douzieme gauge". I don't believe you. Proops Brothers spell it differently and surely they cannot be wrong! Plummet Quote Link to comment Share on other sites More sharing options...
Tony K Posted April 11, 2014 Share Posted April 11, 2014 Posted by Plummet on 10/04/2014 22:47:10: Posted by Tony K on 10/04/2014 22:21:22: Pedant alert! The correct name is "douzieme gauge". I don't believe you. Proops Brothers spell it differently and surely they cannot be wrong! Plummet The ancient measuring system previously referred to is based on a series of twelfth divisions. Douze = twelve, Deux = two. Proops are wrong. Edited By Tony K on 11/04/2014 08:28:53 Quote Link to comment Share on other sites More sharing options...
Pete B Posted April 11, 2014 Share Posted April 11, 2014 Posted by Tony K on 11/04/2014 08:15:22: The ancient measuring system previously referred to is based on a series of twelfth divisions. Douze = twelve, Deux = two. Proops are wrong. Correct. Proops may be an accomplished seller of tools and gauges but they haven't quite got the measure of French.... I'll get me coat now.... Pete Quote Link to comment Share on other sites More sharing options...
Koen Smits Posted April 11, 2014 Share Posted April 11, 2014 It's old watch maker measuring tool. One devision is 1/72 inch. more you can read here **LINK** Koen Quote Link to comment Share on other sites More sharing options...
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