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).
The investigation of wiring faults on a Bentley owned by Mr. Crittall following a visit to Kingsbury.
| Identifier | ExFiles\Box 162\1\ img056 | |
| Date | 4th February 1938 | |
| To BY.{R.W. Bailey - Chief Engineer} c. to Hs.{Lord Ernest Hives - Chair} c. to Bx. c. to Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} Rm{William Robotham - Chief Engineer}/RC.{R. Childs}1/JH.4.2.38. re Visit to Kingsbury 1.2.38. In order to investigate a complaint case, in which the wiring of a Bentley owned by Mr. Crittall was criticised by the owner's electrician, By/RD. and myself visited Kingsbury and examined the car in question. With regard to the wiring as a whole there was no cause for criticism, however we found the following faults which do show up certain weaknesses liable to cause failure. These are all being taken in hand. (1) Broken Rev-counter cable caused by the speedometer seizing up. Mr. Arrowsmith of the A.T. Speedometer Co opened this rev-counter up in our presence and a very small screw head was found wedged between the magnet and case. We decided that this had been broken off in assembly and had never been retrieved. (2) The field connection between No.1 terminal on the regulator unit and No.1 fuse terminal had earthed behind the regulator unit board. This had been caused by the wire being trapped, when assembling, between the earthing strip screw and the dash board. When we examined the car this wire had been replaced by the owner with a length of twin flex, some means of prevention such as the use of rubber caps, or clips is to be incorporated. (3) The cable from the horn switch to the horn junction box had earthed at the end of the steering column. This was caused by the small ebonite bush fitted at the end of the tube being chipped, this allowed the cable to chafe and finally short. The improvement of this bush is being looked after. (4) The diaphragm of one of the Lucas H.F. horns had broken away from the centre pin, this is a Lucas failure and is being looked after by By/RD. | ||