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 inspection, adjustment, and testing specification for the distribution box and cutout.
| Identifier | ExFiles\Box 163\6\ img259 | |
| Date | 2nd February 1933 | |
| SPECIFICATION OF PRODUCTION INSPECTION ADJUSTMENT AND TEST OF RR. DISTRIBUTION BOX AND CUTOUT. (1) The cover of the distribution box shall be removed and the following details inspected :- (a) The cutout lever for freedom of motion, i.e. without any 'sticking' action; the cutout contact surfaces for correct alignment. The contact bow spring tip should only just touch the armature tip, without appreciable pressure. Also the cutout contact surfaces for a definite rubbing action between the points after making and before breaking. When the points are just making contact, the gap between the armature stop and the magnet pole face should not be less than .012". If it is, the fixed contact point should be raised the required amount. (b) All the fuse holder clips for satisfactory grip of the fuse holders. (c) The fuses for correct sizes and for being satisfactorily gripped in the fasteners. As regards fuse wire sizes these are 30 SWG. copper wire, except the main battery fuse which should be three strands of this, and the dynamo field fuse which is of the cartridge type. (2) It shall now be ascertained that the fixed contact support is insulated from the frame of the cutout by applying an alternating voltage of 200 through a low c.p. lamp between it and the armature. (3) The distribution box shall then be connected up by low resistance wires to an R.R. 40/50 dynamo, a 12 volt battery of suitable capacity, two ammeters A and | ||