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).
Fuse testing, comparing fuse links with cartridge types and recommending the adoption of a tinned copper glass cartridge fuse.
| Identifier | ExFiles\Box 166\7\ img041 | |
| Date | 18th January 1935 | |
| -2- Hs{Lord Ernest Hives - Chair}/Mat.1/MA.18.1.35. Cont'd.{John DeLooze - Company Secretary} (d) That although, as stated in the following test results, the fuse links were electrically better they would still be subject to maladjustment and damage on assembly and are not so mechanically robust as the cartridge type. We recommend therefore that we adopt a tinned copper glass cartridge type fuse in place of our existing type. Test results. Owing to faults occurring on the main fuse, mainly of the nature of the wire becoming fractured or broken when tightened under the terminal screw, tests have been carried out with the object of improving the design of this unit. In connection with this, two types of fuse have been submitted, for tests, by Messrs. L. Weekes; one a fuse link, and the other a cartridge type fuse. To provide a basis for comparison between fuses of the different types, observations were made as follows :- (a) Instantaneous fusing. (b) Fusing current. (c) Oxidising current. (d) Volt drop. (e) Possibility of damage before fuse blows. (f) Possibility of damage on blowing. (g) Points in connection with fitting. (a) In this test an ordinary car battery was short circuited through the fuse. In no case was there any tendency for an arc to persist, or trouble due to the disruption of the fuse. The break in the circuit was quite definite. | ||