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).
Graph comparing the performance of Smith's 'H' Filling Standard Production and 'Packless Gland' type Calorstats.
| Identifier | ExFiles\Box 39\4\ Scan345 | |
| Date | 27th December 1933 | |
| CALORSTAT TESTS E80893 COMPARISON BETWEEN SMITH'S 'H' FILLING - STANDARD PRODUCTION - AND 'PACKLESS GLAND' TYPE THE LATTER BEING OFF 1 J II - PRACTICALLY NEW. MAX BELLOWS MOVEMENT .500" SHUTTERS 'OPEN' SHUTTERS 'CLOSED' LEGEND: SMITH'S - STANDARD -X- 'PACKLESS' AXIS LABELS: TEMP °C PULL - LB PUSH - LB | ||