May 222014
 

Charles Lancaster patented the oval bore rifling, although he wasn’t actually the inventor.  I purchased a cased Lancaster double rifle in excellent condition (serial No. 3076 for 185X) and then acquired a complete wreck of a very similar gun.  The stock had been burnt, the locks very crudely replaced with rebounding Stanton locks  from a breech loader extended to fit the opening, and a major crack running right through the action area.   I didn’t take photos of the ‘before’ state, but the work involved splicing a new heel on the butt – which my friend Dick did for me as my woodwork was not so hot ( its better now) and some additional woodwork that I did manage, including replacing almost all of the wood between the two locks.  I made a pair of new lockplates, fitted with the modified Stanton insides, and made  new main springs.  I engraved the lock plates as an exact copy of the locks on my ‘good’ Lancaster.  The good Lancaster had a circular patch box but there wasn’t one on the wreck, but there was a nasty burn mark on the stock where a patch box would fit, so I made one – but rectangular to cover the entire burn mark and engraved it to match the good one – keeping the circular reference of the original.  I’m not sure I engraved the lion deeply enough, but otherwise I’m pretty happy with it – it shuts with a suitable snap.   Stock is finished with dozens of coats of  ‘Slacum’ – a mixture of boiled Linseed oil, beeswax and terbine driers, put on and then rubbed off as it goes through the jelly stage.  I had a reasonably suitable case that fitted well, which I modified inside, and made a set of tools with ebony handles.  I haven’t attempted to pass this rebuild off as original – the locks and patch box are engraved with my name and the year to avoid confusing future collectors and the case carries a ‘confession’ notice!

These pictures are what I have to hand – I’ll try to take some better ones sometime!  Click on the pictures to enlarge to full screen.

cased lancaster

 

Continue reading »

May 202014
 

I am putting this up in case anyone needs to do the same – I have a SIP P178 HF welder and wanted to get lessons in precision TIG welding from Jason McDougall, who said that without a foot pedal control on the current and stop start I wouldn’t get very far!  Welders with foot controls don’t come cheap, and I didn’t want to scrap my almost new SIP, so I had a look around to see if I could fit a pedal control.  No info on the web that was relevant, although there were a few pics of pedals, and unfortunately no circuits available for that model.  Under the hood I found the current knob was a dual gang potentiometer of 1K Ohm resistance, which was a bit of a problem, as I would have to substitute my pedal for this potentiometer  – I couldn’t find suitable 1K slide potentiometers to make my pedal from, so ended up with a bit of a Heath Robinson arrangement with a cord running round a drum that sat between two 1K rotary potentiometers moved by an arm on the pedal – after a bit of messing about I put in a sprung idler pulley to keep tension on the cord and a microswitch that operated right at the top of the pedal movement – doesn’t quite cover the full range of the pots but probably goes to 120 amps – so far so good….

 

footpedal

Continue reading »