I have an article about how I built one in 7.5" gauge to be published in Live Steam magazine.
There was an article in the September 1971 issue of RMC which was how I discovered the obscure switch.
Maine Narrow Gauge Railroad Co. and Museum offers a reprint of an article from an 1879 issue of “The Railroad Gazette” concerning the Billerica and Bedford. Inside is a wonderful illustration showing the Bryant Turnout in both normal and reversed directions and a very good description of how the mechanism worked. This is available from The Maine Narrow Gauge Railroad Co. and Museum, 58 Fore Street, Portland Maine 04101 for $10 plus $3 shipping.
Just so it is more confusing (in the photo), the turnout is sitting on my track jig for 7.5" gauge.
It is part stub, part point and part monstrosity
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This photo shows the turnout in the normal position. Trians ride through without being on a point.
The right side is a point and the left is a stub block with an embeded point.
If a car comes from the diverging route (ie against the turnout), the point and the point guardrail guide the car. The inside wheel (on the left of the photo) comes down the track and the steel wedge between the two left most rails picks the car up on the wheel flanges and across the head of the through rail and then drops BANG onto the running rail - no derailment (hopefully).
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Doug