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I am familiar with what I think you are describing @Lorenzl. Mitutoyo were the first to make them available I believe, but my program isn't concerned with the physical methods used, just with what measurements should be seen - ie. read from the Mic. It also takes care of the fact that not...

I think that saw should be called a 'Gentleman's Back Saw' rather than a Tenon.

'If you use threads' may seem an odd question on a metalworking forum but I try not to be presumptuous! As an exercise in trigonometry and maths I’ve written a computer program to determine the readings that should be directly observed when measuring the Effective Diameter of threads using the...

I would be ashamed to admit that as my 'practice' :eek: It is the attitude that pervades the minds of those that have no regard for resourses (scarce or not) simply because 'I can pass the cost on, so it doesn't affect my profit'. It also contributes to inflation !

That is certainly a limiting factor !

If IRC it was under DOS and before Windows - but the people who wrote the BIOS were soon able to 'Read' that from the drive. Pascal - in fact even BASIC - can manipulate 'bits' so that's not a reason to promote C. Pre Windows, using Turbo Pascal, my PoS system wrote to and read from...

That's easy - - - they take 'lying' to the extreme :eek:

We've obviously slipped into an area where you have never needed knowledge AES :) You don't need to know how to program the machine you're flying, just how to respond to the results the computer gives you ✈

I'm 80 and still sharpen drills down to 1mm Dia. (Carbide) - below about 3mm I seldom use anything other than carbide.

I've never written any 'C' - and I’m sure it shows! :eek:

I have no doubt that C - and its variants - are useful, I just can't be bothered to make myself think that '{' actually means 'begin' ! Yes, Delphi is in fact Object Oriented Pascal which grew out of Turbo Pascal. I used Turbo Pascal for many years under DOS but my first Pascal Compiler was...

I doubt that it is still the case but I was told only a few years ago that there were more programs written in COBOL than all other languages put together, simply because it was in use for so long and started so early. Modula 2 still has a following but my preference now is Pascal, compared to...

That's close for general purpose cutting most Mild steel, but will give you 120° rather than the 118° that standrd 'Jobber' drills are when new. If you need a drill bit to cut Aluminium, Brass, Delrin, Nylon . . . the list goes on - most efficiently - then you need to take more care. I can't...

From what I've read/heard I'm sure that's an understatement :) If I remember correctly mine was also an ICL - PDP11 I believe, with a 'Stack' of 15" Dia. Disks amounting to less than a megabyte.

Re-visiting this question, I'm now of the opinion that you are not talking about a nut for the Square Form Thread but for the end of the part. The 'Nut' for the Square Form thread will be the 'Jaw' of the Jig. What you haven't shown in your 'Photo' is the end of the part with the nut removed. A...

You're not wrong there! :D The right hand thread is WORN. They will both be Square thread form and you are unlikely to find Nuts unless they are retrieved from another Marples Mitre Jig. Even sourcing Taps to make your own will be a major problem. At least Square Threads are relatively easy...

Yes but Babbage himself did not understand that! The concept of a 're-programmable' device - a series of 'Punched Cards' - pre-dates Babbage who only expanded upon the work of Joseph Marie Jaquard (1804) who in turn improved upon the work of Basile Bouchon (1725). Herman Hollerith's work...

Probably more important than Babbage - she understood the concept that the Difference/Analytic Engine could be used for much more than calculating Log Tables - she even considered that it could write music!! Being a woman (even the daughter of a Lord!) meant that she has been sidelined just as...

It's quite odd how a sideways reference can bring back memories. Of course I remember using 4 figure logs and (being a precocious pedant) the joy at finding a book with 9 figure logs ! At the first reference to logs on this thread, little did I think that I would find a need to use them again...

Ah.... equi-curved :) - The 'shape' of a 50p (and 20p) piece is in fact a Reuleaux Heptagon. The point being that - although it appears to be a shape with 7 sides (albeit curved) - it does have a constant 'Diameter'. This is necessary to facilitate acceptance in vending machines. Looking at...