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 from British Carbons Ltd providing particulars for carbon brush grades G.20 and G.7.
| Identifier | ExFiles\Box 166\1\ img014 | |
| Date | 10th November 1932 | |
| TEL. 5225 CODES: A.B.C. 5TH EDITION. LIEBER'S. British Carbons LIMITED. MANUFACTURERS OF CARBON BRUSHES FOR MOTORS & DYNAMOS. CAR DYNAMOS & STARTER BRUSHES. MAGNETO CARBONS. PROGRESS WORKS. CROWTHER STREET. BRADFORD, YORKS. DIRECTORS: A.{Mr Adams} SOUTHERN. H.{Arthur M. Hanbury - Head Complaints} SAMPSON. B. HOLBREY. X6093 Ho/war WST Messrs Rolls-Royce, Ltd DERBY 10th November, 1932 Dear Sirs, We thank you for your letter of the 9th inst., re Grades G.20. and G.7. and have pleasure in giving you the following particulars. GRADE CONTACT DROP FOR POSITIVE AND NEGATIVE BRUSHES TOGETHER CO-EFFICIENT OF FRICTION. G.20 2.1 .22 G.7. 1.6 .16 Always at your service, we are, Yours faithfully, p.p. BRITISH CARBONS. LTD W Haworth | ||