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).
Letter discussing the trial of a new central chassis lubrication scheme, the Bijur 'Accumulator'.
| Identifier | ExFiles\Box 27\1\ Scan203 | |
| Date | 22th May 1929 | |
| x3603 ROLLS-ROYCE OF AMERICA, INC. SPRINGFIELD, MASS. OY-4 May 22nd, 1929. Mr. E.{Mr Elliott - Chief Engineer} W. Hives, Rolls Royce Ltd., Derby, England. Dear Mr. Hives: CENTRAL CHASSIS LUBRICATION - SECTION 7141 With further reference to Hs.{Lord Ernest Hives - Chair}Gy2, May 2nd, and in reply with copy of letter from Thomas of the Bijur Company, you may be interested in the Bijur "Accumulator" of which print D-1323 is enclosed. We are going to try using this scheme for lubricating the sphere and torque tube without recourse to collecting rings etc. It is a new device in course of development and has advantages in lubricating such parts as front axle, road springs, sphere and torque tube etc. where for one reason or another (leakage points, difficulties of distribution of small oil flows, etc.) a quite large shot of oil at widely separated intervals of say 500 miles, is better than a smaller shot every 50 miles. In its original conception it was to be used only on automatic systems where for example variations in the intake vacuum cause minute "specks" of oil to be pumped into the accumulator, which becomes full at the end of say 30 to 100 miles (depending on the use of the car) and discharges into the distributing lines. The principle is fairly obvious. Oil enters at A.{Mr Adams} fills chamber B, finally produces enough pressure to compress Sylphon C, operating toggle mechanism D, to open valve E and discharge into line through outlets F.{Mr Friese} The original design has a discharge capacity of about 14 cc, representing one stroke of the hand pump. For the sphere and torque tube they have prepared a modified accumulator with a capacity of 50 cc. They are also making a special drip plug having a discharge rate approximately equal to all the rest of the system put together or 14 cc/min. (see list in OY2 Mar.3), and two outlet drip plugs for the sphere and torque tube respectively having discharge rates in the proportion of 4 to 1. -continued- | ||