| Year | 1917 |
| Date | 18-Jan |
| Volume | 36 |
| Issue | 821 |
| Page | 44 |
| Category | Railway |
| Part | |
| Title | Combined Reversing and Speed Controlling Switch for Electric Railways |
| Author | D.J.Sinnott |
| Notes | Arrangement of contacts, body of switchboard, connections to resistance wires in coils, general arrangement of connections |