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).
Letter discussing brake drum tests, comparing brass and aluminium rivets, and mentioning patent rivet-less brake shoes.
| Identifier | ExFiles\Box 120\3\ scan0074 | |
| Date | 8th December 1933 | |
| X44176 TELEGRAMS "LAKE, BRAINTREE" REGISTERED TRADE MARKS "MILLENNIUM" "MIDAS" TELEPHONE N.o 81. BRAINTREE LAKE & ELLIOT LIMITED CASTINGS STEEL & MALLEABLE IRON MADE FROM ELECTRIC FURNACE. GREY IRON. ENGINEERS AND FOUNDERS PROPRIETORS OF THE BRAINTREE CASTINGS CO. ON ADMIRALTY, WAR OFFICE & LLOYDS LIST. MOTOR ACCESSORIES LIGHT REPETITION WORK. BRAINTREE, Essex 8th December, 1933. Experimental Dept. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}21/ OUR REFERENCE 1/T3. KT. Messrs. Rolls-Royce, Ltd., Derby. Gentlemen, For attention - Mr. W. A.{Mr Adams} Robotham. Replying to your letter of the 7th inst., we would say that when we were carrying out our tests on Millenite Brake Drums we found that brass rivets were less liable to damage the braking surfaces than those made of aluminium, as at high temperature the latter showed a tendency to fuse on the surface of the Brake Drum. We did not, however, make any exhaustive tests with a view to finding out the best type of rivet, as the great bulk of our Drum testing was done with our Patent Shoes which contain no rivets. Yours faithfully, FOR LAKE & ELLIOT, LIMITED. W. A.{Mr Adams} Lake Governing Director | ||