From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Production test table for a silent starter combined main and relay switch unit.
| Identifier | ExFiles\Box 64\3\ scan0211 | |
| Date | 6th March 1925 | |
| PRODUCTION TEST TABLE OF EAC. SILENT STARTER COMBINED MAIN AND RELAY SWITCH UNIT. II. RELAY SWITCH UNIT. Copper Contact Pressure for 30 Amperes | Date. | Unit number. | (1) Gen Remarks. | (2) Top paper contact Pressure (28 to 32 ozs.) | (3) Fine wire coil curr-ent at 6 volts.(2.0 to 2.2 amps) | (4) Amperes to operate. (not > 2.10) | (5) Amperes for 3.0 lbs. load (< 3.0 lbs) | (6) Remarks. | (7) Remark | |---------|--------------|------------------|------------------------------------------------|----------------------------------------------------------|----------------------------------------|-------------------------------------------------|----------------|------------| | 16-3-25 | A | O.K. | 30 | 2.03 | 2.05 | 3.0 | ✓ | | | 27-2-26 | B | OK | | 2.4 | 1.4 | 5 ½ | OK | | 6.3.25. | ||