Ordinary header curve, any obstruction.
Anti-header attachment, smooth road.
Anti-header, four-inch obstruction.
Anti-header, eight-inch obstruction.
In the diagrams herewith annexed, [Fig. 4] shows the curve of the saddle of a No. 1 (Ordinary) machine on a level road, and which would be the same against any obstruction. Scale, one-sixteenth.
Remark how the rider must be lifted from the level c to b and be thrown forward from a to b.
[Fig. 5] shows the curve of a No. 2 machine, with the anti-header device, on a level road. The elevation and forward throw are represented by the same letters as in Fig. 4; it will be noticed that the distance from a to b is very much increased.