| March/April 1969

204 E. Cass St., St. Johns, Michigan 48879

I would like to add a few things or ideas to the article, The Injector, by Floyd Cook. Why does it work?

My thinking always was that cold water being heavier than hot or warm water therefore giving it more speed thru the steam jet or by the steam jet, which makes it easy to enter the boiler against its own pressure. Seems like I've read in the past who it was that came up with the idea and made it work, but I've lost it. Who, of our readers, can come up with the answer?

I would like to add to this article with an experience I had with an injector.

Some years ago I built a model engine, three ft. high and six feet long and carrying 175 lbs. pressure, all welded boiler. The shell, the man said, was tested at 900 lbs. I kept 350 lbs. cold water pressure on same for a week to be sure it would carry 175 lbs. easy. It sure performs at that pressure. The injector, a Penberthy, three eights size would not pick up the water over 150 lbs. so I wrote to Penberthy about same, and told them not to tell me all the simple causes, because I know all of them, but that's exactly what they did, so I had to go on my own. Don't know how many times I took the injector apart to find a way to correct this, which I figured was possible. Finally, under a good light, I noticed a small thread in the center of the steam jet. Then looking for something that would fit in there I found a small jet out of a Chevrolet carburetor which fit exactly, and then I started drilling this hole larger, one size drill after another until it picked up the water at the 175 lbs. and it's still in there. It also cut the capacity of the injector by all of half, which is still plenty for my size boiler, but satisfactory anyway. This three eights injector was the smallest one I could find at the time. Isn't imagination a great thing to have?

While I'm at it, I'd like to add a few more experiences I've had with steam. We had a 15-45 Case, new in 1910, with a Judson governor. This was a good governor, bur threshing within half mile from home one Saturday P-M all at once it had only half of its power, driving a 32-54 Case separator. So we had the bundle pitchers take it easy until quitting time so as not to lose any time and drove the engine home that night. On Sunday, we took the governor apart and found the top valve seat going up and down with the top valve, so all we had to do was to bead down the metal to hold the seat where it belonged and that ended that experience. However, had it been the lower seat it might have been harder to find. We had a Gould valve in this engine which made it really easy to handle and easy to fire. Also put rocking grates in it which was a great help. Used this engine 10 seasons and still had the same flues in it and it had plenty of 80 and 90 day seasons.


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