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I see, I see more diagrams in your future...!
Quote from: crueby on April 18, 2022, 07:25:39 PMI see, I see more diagrams in your future...! Yes Chris, but the graphics department of the loco works is talking about a walkout if this thread does not have a finished outside admission piston valve solution soon. Cheers Dan
After this thread wraps up, we need to show the double d valves like Marion used with reversing and throttle built in, and are inside admission with outside help... But thats another whole discussion!
How odd...a mix of D valves and piston valves. It's like Lima wasn't sure of the piston valves..."let's keep one a slide valve just to be on the safe side"! Hahahaha!!
Chris,British Patent number 2340 in 1799. The Murdock slide valve is referred to the long slide valve in some early texts, which is what makes me think early double D variant is what is in the patent.Cheers Dan
Hi Dan,Found it - they way they represent the patent numbers of those early ones is 'GB' then the year, then the number with zeros to pad it out to 9 digits, then A. So, "GB179902340A". I've attached a copy of the original patent in PDF form for you.Chris
Quote from: crueby on April 19, 2022, 01:06:25 AMHi Dan,Found it - they way they represent the patent numbers of those early ones is 'GB' then the year, then the number with zeros to pad it out to 9 digits, then A. So, "GB179902340A". I've attached a copy of the original patent in PDF form for you.ChrisWow thanks, Chris now that I see the drawings I have seen some of them but not all of them. I will have to READ the words and work out how the very first slide valve worked.very cool...... Cheers Dan
they way they represent the patent numbers of those early ones is 'GB' then the year, then the number with zeros to pad it out to 9 digits, then A. So, "GB179902340A".