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).
Mr. Bijur's proposal for supplying 6-volt electrical equipment, comparing it to 12-volt systems.
| Identifier | ExFiles\Box 180\M2\M2.3\ img021 | |
| Date | 17th August 1920 | |
| Contd. -2- EFC1/T17.8.20. he told us of the good and bad points of various apparatus, more particularly apparatus of their own make, that the claims made by him regarding such apparatus could be relied upon in a large measure. Mr. Bijur was very keen for an opportunity being given to his company of supplying an R.R. car with a complete 6 volt Bijur electrical equipment, making use of a 5" motor, their special pinion engagement mechanism already referred to, a simple foot-operated motor switch, and also of a Bijur generator with vibrator control. He considered that he could produce very good results with the minimum of weight, owing to the fewer number of pieces involved. The Bijur pinion engagement mechanism is designed to make provision for :- (1) Avoidance of shock at the instant of engagement. (2) Slipping under excess torque due to back-fire. (3) Avoidance of jamming. Mr. Bijur in his own mind is definitely in favour of 6 volt systems in preference to 12. He considers that equal or better service can be rendered by 6 volt apparatus of less or equal weight respectively, some of his reasons being as follows :- (1) A 6 volt battery of 60 lbs weight is equivalent in capacity to a 12 volt battery of 72 lbs. weight, partly owing to the fact that for the same capacity a 12 volt battery has six more negative plates, also more cell containers. Contd. | ||