| Year | 1947 |
| Date | 07-Aug |
| Volume | 97 |
| Issue | 2,411 |
| Page | 161 |
| Category | Railway |
| Part | 13 |
| Title | Railway Interlocking Frames. The Sykes Electro-Mechanical Frame - 2 |
| Author | O.S.Nock |
| Notes | General arrangement of slide frame, view of slide handle and plunger contact, miniature slides of Sykes electro-mechanical frames |