| Year | 1924 |
| Date | 24-Apr |
| Volume | 50 |
| Issue | 1,200 |
| Page | 471 |
| Category | Electronic |
| Part | |
| Title | Breaks for Spark Coils |
| Author | John Pike |
| Notes | Elevation of motor driven break, cone shaped fitting functions as pump, plan of baseboard, altered position of commutator on motor spindle, break run from an old type motor |