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).
Cross-section diagram of a Mercury Motor Element for direct current ampere-hour meters.
| Identifier | ExFiles\Box 164\3\ img212 | |
| Date | 1st May 1938 | |
| BRITISH SANGAMO COMPANY DIRECT CURRENT AMPERE-HOUR METERS. TYPES NT & NF VEHICLE & BATTERY PATTERN. 2 Wire UPPER BEARING SCREW UPPER PIVOT BRIDGE FLAT RING JEWELS UPWARD THRUST OF MOVING ELEMENT ONLY 1/10 OUNCE THIS IS THE ONLY ACTUAL BEARING STEEL SHAFT COUNTERWEIGHT WORM ENGAGES TRAIN HOPPER CAP METAL HOPPER OUTER SHELL OF MERCURY TUBE INNER SHELL OF MERCURY TUBE BAFFLE HUB MOUNTED ON ARMATURE LOWER JEWEL GUIDE LOCATED IN HUB OF MOVING ELEMENT UPPER MAGNETIC POLE PIECE BOLT HOLE FOR MAGNET ARMATURE BOX OF MOULDED INSULATION PAPER GASKET LOWER MAGNETIC POLE PIECE LOWER PIVOT FIXED IN BOTTOM OF ARMATURE CHAMBER CURRENT CONTACT EAR CURRENT TERMINAL ROTATING COPPER DISC SUBMERGED IN MERCURY LOWER PIVOT SCREW Fig. 1. Cross Section of Mercury Motor Element Types NT & NF Meters. (Mercury indicated by tint). British Sangamo Co., Ltd., Cambridge Arterial Road, Enfield, Middlesex, England. Sheet B145/0538. | ||