Taylor hobson etcher

[paul raynerParticipant @paulrayner36054]

Hi everyone

I have just acquired this weekend a taylor hobson "javelin" etcher and a normal etcher but no transformer or instructions other than these I've found on the internet http://www.uphill.org.uk/pages/engineering/machinery/taylor/manual/th_03.htm

can any of you guys enlighten me as to the voltages, needed

or even a transformer for sale???

or maybe a manual? in the link it states to get in touch with them for more information so I'm assume that there is some sort of paperwork available at one time

regards

paul

[paul raynerParticipant @paulrayner36054]

[Michael GilliganParticipant @michaelgilligan61133]

Paul,

PM sent

MichaelG.

[Ady1Participant @ady1]

3640 sept 1980

News from the Trade
A couple of news items of the Trade: we hear that
Mitutoyo (UK) Ltd has opened a new suite of repair
and calibration rooms at its Andover Headquarters
(tel. 02&-53123) for its micromerer and oprical
projector products. A new company, Newington-Hull
Ltd has been formed to take over production and
marketing of machine tools hitherto supplied under
the Taylor-Hobson name. Taylor-Hobson will be
remembered for their small pantograph engraving
machines and optical products,

[Ady1Participant @ady1]

Try

taylor hobson javelin pdf

in googlie

Theres a bit in here

**LINK**

[Michael GilliganParticipant @michaelgilligan61133]

Paul,

Have a look at Page 81 of this

MichaelG.

[BazyleParticipant @bazyle]

Perhaps MichaelG's private post solved your problems but for the rest of the world I went delving into my cupboards. I'm quite pleased I remembered which cupboard it was in and found a motor I'd forgotten about at the same time.

The Transformer is a big round cast iron box but just contains an ordinary transformer, AC no rectifier as it actually has to be AC not DC. There is a 6 position switch on top.
I found a nice little note to myself in the Javelin box.

1/ 2.4v
2/ 3.2v
3/ 4.0v
4/ 5-0v
5/ 6.3v
6/ 8.0v
All AC. 4Amp then a note I don't understand "5v AC on coil"
I expect these are all open circuit.votages and the last note might be the 8v on load.

Charging up camera batteries for photos later.

[Michael GilliganParticipant @michaelgilligan61133]

Interesting, Bazyle

Mine is a small rectangular box, with a set of paired sockets for the various voltages.

… Presumably a "Poduct Improvement"

Likewise, I will photograph it when I can dig it out.

MichaelG.

.

P.S. I wasn't being secretive !!

[EmgeeParticipant @emgee]

See my Taylor Hobson Album for more pictures of the later type transformer and etching head, looks like 10v and believe it was DC, the current to the etcher was switched on/off by the action of a solenoid acting on a set of contacts taking power to the etching needle, (current passing through the coil breaks contacts) this was all built into the head. The etching depth was adjusted by using different voltages on the transformer output and is great for all metals, especially HSS and toolsteel.

I used it on a TH model K machine, probably the RollsRoyce manual operated engraver.

Emgee

[Ady1Participant @ady1]

The ME guys got that name change wrong bigtime

It's Newing-Hall ltd not Newington-Hull ltd lol

[BazyleParticipant @bazyle]

Engaged brain. The coil gets a constant 5v and the variable voltage is to the javelin. I only have one size No14. Are they still available from NH?
The javelin is a copper rod about 1/16 dia x 5/8 with a tungsten spike in the working end. Top end is widened out to enable number to be engraved on. Spikes available in variable widths. Held into hoolder with coplicated shape of spring. All makable of course as long as you have one as a pattern.

Glad I got this out as it has become a bit rusty on the side next to the wooden box.

There is no earth return connection on the old transformer so I think the path was assumed to go through the machine earth and mains earth.

[Michael GilliganParticipant @michaelgilligan61133]

For info. … Here is the 1946 [Canadian] Patent

[other versions may be available]

MichaelG.

[Ian PParticipant @ianp]

I have had this in my 'odd bits of material' box for quite a few years. It looks to be Nickel Silver about 0.4mm thick and about 6" long. I have no idea what its used for but at least I know what its used with!

Ian P

[Michael GilliganParticipant @michaelgilligan61133]

As promised …

Here are photos of mine, which is branded "Rank Optics"

[ One of the later owners of "Taylor Hobson" ]

It has Serial No. RWS0002 on an adhesive label

but I don't know if that's the Manufacturer's or the Owner's.

Note that the thin red wire takes 5.5 Volts to the 3-pin outlet.

MichaelG.

 

Edited By Michael Gilligan on 08/04/2014 20:46:21

[Neil WyattModerator @neilwyatt]

One of those would be a good boot-sale find. That transformer would make the basis of a decent high-amp bench supply, especially driving something like a 12V milling attachment..

Neil

[Ian PParticipant @ianp]

Is the part I sent the picture of earlier today any use to anybody? I will pop it in the post if anyone can make use of it.

Ian P

[paul raynerParticipant @paulrayner36054]

Micheal G

pm sent

paul

[paul raynerParticipant @paulrayner36054]

Wow guys

many thanks for info & links

regards

paul

[Michael GilliganParticipant @michaelgilligan61133]

Here is another little gem from the global library

1944 Advert.

MichaelG.

[BazyleParticipant @bazyle]

Ian, I would be interested if you want to part with your blade bit. I assume it is the adjustment tool mentioned in one of the earlier links.

MG's link gives a nice photo of the working end. I have added pictures of a javelin in mount and round transformer to my album but can't get picture links to album to work any more.

[Michael GilliganParticipant @michaelgilligan61133]

Very stylish Transformer, Bazyle,

I've never seen hat one before … thanks for the pics

I was tickled to see the numbers, etc. cast in the top plate

… somewhat inappropriate for the Engraving Machine manufacturer.

MichaelG.

[Ian PParticipant @ianp]

Posted by Bazyle on 08/04/2014 22:41:02:

Ian, I would be interested if you want to part with your blade bit. I assume it is the adjustment tool mentioned in one of the earlier links.

MG's link gives a nice photo of the working end. I have added pictures of a javelin in mount and round transformer to my album but can't get picture links to album to work any more.

Bazyle

PM me your address and I will post it.

I do not see any mention of an adjusting tool but whatever it is, its yours now.

Ian P

[paul raynerParticipant @paulrayner36054]

bazyle

I see your transformer takes a 3 blade plug. the javelin I acquired has a 4 blade plug.

Its looking like theres quite some variation among these items as thats 3 different sorts of plugs I've seen so far

Paul

[BazyleParticipant @bazyle]

thanks, Ian. I'll make a donation to 'Workaid' which our club supports.

The 3 pins are to allow one voltage and return for the coil and one different voltage for the spark. A fourth pin could be for a flying lead earth return to attach to the job.

[BazyleParticipant @bazyle]

Received Ian's special tool today (many thanks) and matched it to various parts of the etcher. It seems the scalloped bit is to set the distance from the magnet to the back of the javelin holder. Well that's the only thing that seemed to match. the thickness corresponds to the magnet armature gap.

I now realise I have two types of holder – one has a spring to hold the javelin and will be self levelling and the other has a hole and locking screw so might be either for a diamond if that would hold up under the action or for something like a gramophone needle.

[Author]

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