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 construction of an electrical switch, detailing its winding, contacts, materials, and operation.
| Identifier | WestWitteringFiles\L\April1924-June1924\ Scan53 | |
| Date | 15th May 1924 guessed | |
| (2) turned up in one place to form a tab to which the conductor is sweated. This flange also has a tab passing completely underneath the hold on contact plate and is squeezed into contact with this plate by the bolt securing the contact in position. The lower portion of the winding on the bobbin is for the main current and consists of a ribbon of copper cut to a peculiar form thus:- and rolled up into 2 coils with strips of insulation wound in at the same time and a complete washer separating one coil from the other which is slipped into position before the winding operation. This winding is joined to a special post by means of a flag terminal which forms a terminal for one of the main conductors. In the 'off' position the switch makes contact with the bridge in which position it completes the push button circuit through the actuator solenoid and the teazer circuit of the motor. The contacts themselves are of the gold silver alloy we use on Goshawk cutout switches, as also are the hold-on contacts. The contacts made in the 'off' position are provided with a carbon break of the Bleriot-Phi pattern. The carbons are interchangeable, the upper ones being provided with a copper cap and a flexible connection. View No.3. This is purely an outside view shewing the means of securing the cover to the base. View No.4. This view shews how the connection is made from the negative pole of the main switch to the ribbon winding on the magnet of the auxiliary switch. It also shews how the | ||