| Year | 1926 |
| Date | 01-Jul |
| Volume | 55 |
| Issue | 1,312 |
| Page | 19 |
| Category | Recent Inventions |
| Part | |
| Title | Method of Closing the Slots for Windings in Dynamo-Electric Machines |
| Author | |
| Notes | Section of slot with wedge in place, sketch of fabric used for wedges, by The Diamond Coal-Cutter Co. and P.Huggins |