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).
Comparative analysis of various dynamo and regulator systems, with a detailed description of the Aero type U.B.
| Identifier | WestWitteringFiles\J\November1922\ Scan51 | |
| Date | 13th November 1922 | |
| contd. -6- EFC1/T13.11.22. (1) Aero type U.B. dynamo & regulator. (Loaned to us for expl. purposes by F.H.) Single pair of carbon contacts with varying press; Resis. as shunt across field coil & also resistance to oper No resis. across co (2) R.{Sir Henry Royce} Bosch dynamo & regulator. Varying pressure & quantity of carbon granules between pla (3) Bijur vibrator regulator & dynamo. Metallic contacts, shunted by resis. and with second resis. shunted across field circuit. (4) Liberty dynamo & regulator. Metallic contacts shunted by a resister (5) Scott Series of carbon plates with varying pressure, shunted by a resistance. (6) Westinghouse dynamo & regulator. Metallic contacts, shunted by a resistance Aero type U.B. This we experimented upon and reported in our EFC4/T17.8.20 and EFC6/T1.10.20. The dynamo is 2-pole 12 volts. The main operating coil is across the voltage but a resistance as a shunt across the field coil is also wound on to assist the operating coil in an additive direction. There is no resistance across the carbon contacts. These do not behave like metallic contacts as the whole variation of contact resistance is brought about by variation of pressure. Contact is never actually broken as this would reduce the excitation to zero, but in the later stages of the pressure Contd. | ||