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).
Page of instructions for adjusting main and auxiliary switch units, detailing clearance settings.
| Identifier | ExFiles\Box 64\4\ scan0187 | |
| Date | 27th February 1929 guessed | |
| Contd. -2- when armature stop reaches core. (3) Now set relation of the copper and carbon arms by placing an .040" distance piece between the last to make copper contacts and adjusting the carbons to be just in contact when the copper contacts are just in contact with the distance piece. (4) Now adjust the stop of the main switch lever so that in the fully off position on the carbon contact gap is .040". Except in the case of (1), the adjustments above refer to the main switch portion of the unit and enable this unit to be first adjusted correctly. The following adjustments refer to the auxiliary switch unit. (5) The adjustment of the height of the fixed top silver contact of the relay switch is the first adjustment on this switch. This contact should be adjusted so that there is a clearance of .025" between the main switch lever side arm and the bakelite packing piece, when both levers are in their off positions. As in (1), when both levers are in their fully down positions there is .010" clearance, therefore the stroke of the relay switch lever on the pole centre line is .015" less than that of the main lever. (6) The carbon contacts of the relay switch should next be adjusted so that the gap at the silver contacts is .025" when the carbon contacts are just breaking. Cont'd.{John DeLooze - Company Secretary} | ||