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).
Diagram sheet explaining the components and operation of the Hobson K-S Telegage fuel gauge.
| Identifier | ExFiles\Box 44\4\ Scan106 | |
| Date | 1st February 1930 guessed | |
| Diagram Sheet (3) FOR THE HOBSON K-S TELEGAGE MADE BY H.{Arthur M. Hanbury - Head Complaints} M.{Mr Moon / Mr Moore} HOBSON, LIMITED 47/55, THE VALE, ACTON, LONDON, W. 3. Telegrams: "ASSEMBLAGE, LONDON." Telephone: "CHISWICK 4231 (4 lines)." BRITISH MADE Fig 1—Tank Unit. Labels: Top Plate, Air Line Connection, Pressure Balance Chamber, Air Cup, Air Delivery Tube, Air Tube, Air Chamber, Hole C, Bell Plate, Air Line, Pressure Balance Air Line, Pump Line Connection, Pressure Balance Air Line Connection, Hole D, Support Tube, Triple Air Line Assembly, Flexible Metal Tube, Hand Pump. Fig 2—Head. Labels: Pump Line, Glass Tube, Air Line, Red Liquid, Brass Tube, Lock Nut, Calibrating Wire, Pressure Balance Air Line, Air Pump Line. Fig 3. Telegage in Operation, Tank empty. Labels: Pump Air Line, Petrol Tank, Air Tube, Air Chamber, Air Line, Pressure Balance Air Line, Pressure Balance Chamber, Hand Pump, Full, Empty, U-Tube, Special Red Liquid, Connection, Connections. Figures 3 and 4 show a simple Pressure Balance Telegage and Hand Air Pump. The Air Cup, and Air Delivery Tube have been omitted as they take no part in the reading of the gauge. They are simply used as a means of supplying air to the Air Chamber to overcome any loss by absorption. Fig 4. Telegage in Operation, Tank full. Labels: Pump Air Line, Petrol Tank, Air Tube, Air Chamber, Air Line, Pressure Balance Air Line, Pressure Balance Chamber, Hand Pump, Full, Empty, U-Tube, Special Red Liquid, Connection, Connections. If one of the connections are opened while the tank contains Petrol the trapped air will escape and petrol will rise in the Tank Unit to the same level as in the tank. Similarly the liquid in the U-tube will fall until the same level has been reached in both sides, which should be at the “Empty” mark. Now, if the connection is again made, the gauge will still read “Empty” until the Air Chamber and AirTube are cleared of petrol and again filled with air. This is accomplished by the surge of the petrol as explained in the “Correction Sheet” under “Test No. 1,” or by operating the Hand Pump. (THIS IS NOT THE CORRECTION SHEET.) | ||