Track Trips Patents (Class 246/201)
- Single vertical pivot on which track trip turns (Class 246/203A)
- Single vertical pivot; strike rod transverse of track (Class 246/203B)
- Single horizontal pivot on which track trip turns (Class 246/203C)
- Single horizontal pivot; strike rod transverse of track (Class 246/203D)
- Horizontal pivot, vertical rod, strike rod perpendicular (Class 246/203E)