Check out ebay item 260001386700 ....... maybe next time you need to sell some loose items letting them sit out in the rain a bit might help their value.......
I love it.... I just took my Archbut magazine set and buried in my garden. I can't wait till the worms eat into the oak case and the steal is rusted to a point...
I have posted two photos of a Geo Kent Ltd, London & Luton, linear planimeter that I have just purchased. It is housed in a fitted mahogany box with dovetailed...
I have seen a few posts with questions about the dates of certain catalogs. I can probably determine the age of your catalogs with fair degree of accuracy. My...
Hi all, another request for assistance I'm afraid. I have posted some photographs under the heading unusual protractor. I have never seen one like this before...
I saw this on Ebay the other day and I found it perplexing as well. Are the prickers resting in the up or down postion normaly? In other words do you have to...
Hi Nick, I too have not seen one like this before. Hopwever I think that it is some sort of plotter to be used in conjunction with a map or chart. In use the...
Hi, many thanks David and robert for your comments, all very logical. The pins can be lowered or raised using the levers, but my guess is they would be lowered...
... Can't say I've noticed prices on the occasional station pointer I've seen for sale, but there are three up on eBay at the moment, one Kelvin & Hughes, one...
What the pictures show is a "station pointer", an instrument used in navigation within sight of shore. You take the bearings of three separate landmarks...
Are there any good books or manuscripts avaliable that describe the actual construction techniques for drawing and mathematical instruments? I seem to be able...
While not truly describing the detail of fabrication the only works I am aware of that come close are: Edmond Stone 1758 (English Translation of Bion) "The...
I just posted a photo of three funky ruling pens I thought I would share.. Two have what appear to be brown bakelite handles. One is marked 'DESIGNO.....
Thank you Dave, You are always a great help in these Matters. One of the things that has always perplexed me is the triangular pegs and holes that the early...
Ammendment to my previous post. I found the reservoir pens in my Dietzgen catalogue after all. I am going blind too. Well that matches my broken finger I...
Could have bored the hole and then used a shaping plane type tool to enlarge the boring or could have cast the rough form including the triangular void or...
I have examined at a few of my older brass compasses (ones with hand-cut wingnuts) under a magnifying glass, to see how they were made. The brass legs appear...
ANNE & BRUCE SANDIE
sandie@...
Aug 2, 2006 12:18 am
1453
I too have looked at a number of these compasses with a magnifying glass. The rather irregular triangular shape of the recesses certainly looks as though they...
I once again have bought a bit of junk. In that junk was a partial set of instruments with the name "Sterling Swiss" on them. The only thing left was a...
... Just my opinion, but I would have thought the early compasses, dividers, and triangular holes, were cast; then to clean them up they would have been ...
Sorry John, but as a professional mechanical engineer (now retired) I cannot see any way that they could have cast in a long thin triangular hole at that time....
... I can't come near you in professional engineering skills, and your views may be correct - up to a point! In the first place, for delicate jobs, and we are...
Hi All, I have been following this thread with much interest. I wonder if this particular part could have been cast in all its detail by using the "lost wax...
I too just read this thread and this is of much interest to me, both because I'm very interested in the shop technologies used in the 17th and 18th centuries...
I just added two Swedish manufacturers to the list. I have very little information on them. I just picked up a single ruling pen maked "CL.LINDHOLM" "SWEDEN". ...
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