Welcome Asherjackson to MEM.
I don't have the article you are asking about, sorry. I do have an alternate source of injector knowledge for you though. There's a book by D.A.G. Brown called "miniature injectors inside and out" which clearly explains the theory, construction methods, and testing of small steam injectors. Mine is by TEE Publishing in the UK and the ISBN number is 1 85761 134 9. It's far more sensible and practical than anything else I have read on steam injectors, and I built several successful ones straight from the book instructions. Valves and pipework for the injector are also important and Mr Brown covers these subjects too. Even has a section on steam ejectors for making vacuum for vacuum braking of engines and trains as is/was common on UK locomotives small and full size apparently. Just food for thought.