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).
Blueprint illustrating eight different schemes for excluders with a corresponding table of measurements.
| Identifier | ExFiles\Box 84\2\ scan0283 | |
| Date | 1st February 1935 guessed | |
| STANDARD SCHEME DRAWING 1 SCHEME 2 SCHEME 3 SCHEME 4 SCHEME 5 SCHEME 6 SCHEME 7 SEE ALSO HS.{Lord Ernest Hives - Chair} 1708. SCHEME 8 TABLE: DRWG. N° | TYPE OF EXCLUDERS | FROM OUTSIDE | 0° | 45° | 90° | TOTAL 1 | STANDARD | | 7 | 7 1/2 | | 14 1/2 INCOMPLETE 2 | 3 B IV | NIL | 6 | 1 3/4 | | 7 3/4 3 | DOUBLE TYPE, SMALL | 1/8 | 10 1/2 | 8 | NIL | 18 5/8 4 | DOUBLE TYPE, LARGE | NIL | 9 | 7 1/4 | NIL | 16 1/4 5 | 5 B IV | NIL | 1/2 | 9 3/4 | | 10 1/4 INCOMPLETE 6 | 5 B IV WITH ONE SCREEN | NIL | NIL | 2 1/4 | 8 | 10 1/4 7 | 5 B IV WITH BOTH SCREENS | NIL | NIL | NIL | NIL | NIL 8 | DEEP GROVE TYPE | NIL | 1/8 | NIL | NIL | 1/8 BLANK SPACES MEAN NO READINGS TAKEN. | ||