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).
Developments and faults in the Bijur Automatic Lubricating Systems.
| Identifier | ExFiles\Box 27\1\ Scan066 | |
| Date | 14th February 1929 | |
| S/W HB{C. E. Harcombe} X3603 ROLLS-ROYCE OF AMERICA, INC. SPRINGFIELD, MASS. OY4- February 14th, 1929. Mr. E.{Mr Elliott - Chief Engineer} W. Hives, Mr. R.W.H. Bailey, Rolls Royce Limited, Derby, England. c - Mr. Sidgreaves Gentlemen: Bijur Lubricating Systems (Automatic Systems) Section 7141 Further to OY2 February 1st, Mr. Bijur came to the works today to discuss the developments in automatic systems. He is supplying a set to us within four weeks. Outlining the need for the "accumulator" to give intermittent shots to the system rather than a continuous small feed, he said that they had tried to work out a practical continuous feed for several years. The faults have been :- (1) The problem of distribution of oil through mechanism beyond the drip plugs is much more difficult. (2) To keep the system full of oil and at the same time feed slowly enough through a lot of drip plugs in correct proportion, requires making the non-return valves in all the drip plugs lift with exactly the same pressure, or else using no springs at all on the drip-plug valves. (3) Particularly in summer the oil pressure must only be a fraction of a pound greater than that required to open the valve - otherwise the flow is too great. (4) With such low pressures difference in height of the drip plugs makes a great difference in the rate of flow, and actually in hot weather high drip plugs receive no flow at all. -continued- | ||