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).
Description of the control circuits for a Super Sports sequence starter.
| Identifier | ExFiles\Box 64\2\ scan0138 | |
| Date | 1st January 1928 | |
| x7625B EFC. HS.{Lord Ernest Hives - Chair})FROM R.{Sir Henry Royce} E.{Mr Elliott - Chief Engineer} ) S E C R E T. RL/M9.1.28. c. BJ. LHS.{Lord Herbert Scott} RG.{Mr Rowledge} PN.{Mr Northey} DA.{Bernard Day - Chassis Design} CWB. C. SG.{Arthur F. Sidgreaves - MD} MR. CLAREMONT. EAC.10. SUPER SPORTS. SEQUENCE STARTER AS DESCRIBED IN 1928. x76253 The control circuits pass through the press button (single way), then by single wire to the magnetic switch, until where it divides into three viz: A.{Mr Adams} being the teazer circuit which first goes through the released "off" position contacts (hold off magnet), and then on through the teazer field winding (on the motor), and through the ordinary series field, and finally through the motor armature and to earth. (This circuit is normally complete - except at press button). B. is the main switch magnet circuit which goes through the main switch coil and upper half of the hold out coil, (it has not any contacts - make and break - on the switch unit), then on to the contact make and break on the motor, then to earth. (This circuit is not made until the motor gearing is almost completely engaged). C. circuit passes through the "on" position contacts of the hold off magnet, then through the lower half of the hold-off magnet winding. This circuit is not made until the main switch moves to the "on" position: this is when the teazer circuit is broken. NOTE 1. The circuit A, has a non-inductive resistance in parallel to reduce sparking on the motor contact make and break. NOTE 2. The "hold-out" armature is interlocked (one way) with the main switch armature so that the former cannot be in the "off" position when the latter is "on", but the main switch (latter) can break the main motor circuit and leave the hold on in the "off" position until the press button is released. The contacts on the motor is to provide a silent engagement, and the hold off magnet is for silent disengagement, and to bring all to rest quietly, independently of the skill and careful manipulation of the press button. Contd. | ||