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).
Dynamo faults, including issues with brush bedding and the lack of a fuse, with proposals for a repair process.
| Identifier | ExFiles\Box 51\1\ Scan388 | |
| Date | 5th June 1924 | |
| - 2 - BY6/H. 5. 6. 24. ----------- d {John DeLooze - Company Secretary} /- The top of the brush was square where the spring bedded on it. This I had modified as I considered it was a fault, with the result that this made a very material difference to the running of the dynamos, in as much as it prevented the bedding of the brush from changing from one edge practically to the other, according to how the brushes were put in or the spring holding them down was let go by the operator. Obviously, nothing to do with the goodness or badness of the fitting, but a faulty in design, and one which I drew attention to, and after considerable testing, was adopted. e {Mr Elliott - Chief Engineer} /- The dynamo scheme did not include a fuse in the field, the result of this being that excessive current resulted in spoiling the dynamo instead of putting it out of action. All of the above features have been included now for some little time. I believe that if I discussed the matter with Mr. Brock we could fairly well locate the number of machines affected by the early faults and in any case every machine that comes to hand from the Repair Dept. is being handled by Mr. Brock and being altered and brought up to date, and returned The right way I think to deal with the whole trouble is to bring Br. {T. E. Bellringer - Repair Manager} into line with our Repair Dept. here, by which he would return all the dynamos for inspection to the Works, but would of course have to have a certain stock of dynamos by him to permit of this so that he could add a dynamo to the car and sent it out. without waiting. We suggest that this treatment should take place on all cars from the start up to a certain number. After that, it is not necessary, but I felt that it is wrong for Cricklewood to be dismantling and over-hauling or re-fitting dynamos when same have failed, which to my mind is worse, as they have no equipment for doing it, that I am aware of, and certainly have not the information which is available in Mr. Brock's Department. Contd: | ||