Drawings for the Eureka relieving attachment for hobs

I wonder has anyone either made or got some drawings of the Eureka gear cutter relieving attachment that Charles Lessie made for relieving hobs which is on youtube.

It seems to work very well all i need is how much it has been extended from the original Ivan Law/Prof Chaddock version.

http://www.youtube.com/watch?v=kJ8kyC_bpHs link to the attachment being used.

Hi,

Drawings are in "gears and gear cutting" Ivan LAW WPS-17

pierre

I have found the picture of the Charles Lessie's hob relieving attachment on one of the Yahoo groups sites no drawings but lots of pictures which i can scale off and the latest version of his device and adaption fron the one found in the gears and gear cutting by Ivan Law in the special intrests book range.

Links to the pictures of his first design

http://groups.yahoo.com/group/mwmills2/photos/album/2052598602/pic/list

charles improvments for ease of use

http://groups.yahoo.com/group/mwmills2/photos/album/1286132389/pic/list

This maybe of use for other making and relieving hobs

Hi John,

See your personal messags.]

Best regards

Terry

Another would-be Eureka maker here

Have the materials ready, bought the book, but I'd love to read the original articles.

Naturally the offending - vols 185,159,160 (issues 3794, 3796, 3804, 3820) fall neatly into a gap in my little collection!

If I could beg, borrow or steal these I'd be a happy bunny - any reasonable cost would be OK.

Regards,

Ruaidhrí

That's a brilliant invention. Amazing

How on earth did he think of that one... back in 1903...

You can't put in what God left out

**LINK**

I wonder if any of the harmonic drive was based upon his work

**LINK**

Just shows you, there's always something new to come up with, if your brain is tuned in

Also makes you wonder how much is really "new"

Some guys must take these systems to the grave

Funny how they could do this sort of stuff pre WW1 but the interrupter gear from Fokker took ages to figure out

Edited By Ady1 on 10/10/2012 18:22:09

http://www.youtube.com/watch?v=kJ8kyC_bpHs

Edited By Ady1 on 10/10/2012 18:42:10

The original patent is here... submitted in 1894

**LINK**

Edited By Ady1 on 10/10/2012 18:53:38

Ady,

Thanks for the Patent link

MichaelG.

Here's the original from 1906

**LINK**

I built one of the Ivan Law models but scaled it up times 2 so that i could make standard 1" bore cutters.

Worked very well and made loads of cutters, ironically all form cutters and none were gear cutters.

All made out of 1/2" steel plate and professionally hardened to last.

John S.

A shedload of specific numbers in there

A computer dude could possibly produce a working program to derive definitive answers for specific queries

John,

Thanks for that additional Patent link.

One real joy of t'internet is that Patent collections are so freely accessible.

MichaelG.

Hi Ady,

If you think that's ingenious have a look at rose engine turning. The Rose Engine uses cams, rocking frames, cutting heads and special chucks on a purpose built lathe to produce ornamental patterns, ornamental turning using this system was known in the 15th Century. The same principle is used in Guilloche work for complex patterns on metal objects, especially watch parts and dials.

Early ornamental lathes and rose engines were produced by Holtzapffel in London from when he set his business up in 1794. See further articles explaining the technology and equipment in pdf form here

Also, if you get a chance look at the automatic block making machinery of Maudslay and Brunel (father of Isambard) installed in 1803 when Maudslay was 33 yrs old, which was the basis of the first production line system as we know it..

Best regards

Terry

Edited By Terryd on 11/10/2012 09:28:16

cheers Terry

The fancy one that springs to mind is Pittler and his trapezoidal bed

A rare machine, difficult to find, there's actually one on fleabay at the minit

Edited By Ady1 on 11/10/2012 11:12:02

Hi Ady,

I have to say that the Pittler is impressive, but relatively simple compared to the Holtzaffel. The latter uses not only cutting frames and other devices but a 'rocking' headstock and cams to effectively create a programmable lathe using mechanical programming devices in much the same way that Jacquard used his punched cards to control the patterns woven by his looms.

By the way, the punched card system was adopted to process the data of the huge number of immigrants in the USA by Herman Hollerith (an immigrant who knew of Jacquards work) a clerk in the immigration office. He went on to found the Tabulating Machine Company which later became the International Business Machine Company or as we know it - IBM and the rest is history.

Life is an intricate web.

Regards

Terry

John, look at your messages

Regards John

> Hollerith

A name cursed by all those exposed to the joys of F0RTRAN (a language which mutilates the mind far more than BASIC).

Neil

Hollerith Card

According to Wikipedia

"This IBM card format, designed in 1928,^[19] had rectangular holes, 80 columns with 12 punch locations each, one character to each column. Card size was exactly 7 ³⁄₈ by3 ¹⁄₄ inches (187.325 mm × 82.55 mm). The cards were made of smooth stock, 0.007 inches (180 µm) thick."

Get your calculators out ...

Just compare that bit-density with what they now get on MicroSD !!

[which is, of course, Read/Write, etc.]

MichaelG.

Hi Michael,

The first program I wrote was in algol 68 at Lancaster Uni in the late 60s. It was then passed to a technician who created the punched cards and then he fed it into the machine (ICL 1600 if I remember correctly). God help he (or she) who let the pile slip and fall! .

Regards

T

.

When I were but a mere lad that were all fields round there...............................................

John S.

Terry,

You may then have met my future Wife <Anne>, who was one of the Operators.

... or even my Father <Peter>, who [1966-1968] ran the Nuclear Physics Workshop; but was called-in from time-to-time, to help Gordon fix the contraption.

Anne left in 1971, and moved with me to Loughborough; where she carried a fair few Hollerith Cards for the researchers in the Ergonomics Department.

MichaelG.