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).
Promotional leaflet for 'Overload' pressure gauges and related instruments for internal combustion engines.
| Identifier | ExFiles\Box 40\1\ Scan020 | |
| Date | 6th November 1934 | |
| FOR I.C. ENGINES: ACROMETERS SHOW THE COMPRESSION PRESSURE AND THE EXPLOSION PRESSURE BY STEADY POINTERS ON LARGE GAUGES. TO OBSERVE THE COMPLETE CYCLE OF PRESSURES USE THE ACCURATE MANOGRAPH. "OVERLOAD" GAUGES For WATER, OIL or FUEL NEVER FAIL NEGRETTI & ZAMBRA LONDON GENUINE BOURDON "OVERLOAD" PRESSURE GAUGES. E.{Mr Elliott - Chief Engineer} BOURDON Inventr & Manufacr To make certain of satisfaction, insist on having the above Trade Mark on each dial. 4300 4100 4200 On many pressure services there are certain conjunctions of circumstances which give rise to pressures considerably in excess of the normal working ones. In such cases the usual practice has been to use a gauge with a scale for a much higher pressure than the normal, and the working range is thus very much cramped and frequently difficult to read. By using “Overload” Gauges, the working range may occupy the whole of the scale-space, and yet the gauge will always be ready to stand any excess pressure. It may be that only very exceptional circumstances will give rise to abnormal pressures, yet this feature of being able to deal with any excess pressure which may arise, and therefore not “giving out” in the hour of need when the service is pressed, warrants the adoption of “Overload” Gauges in practically all instances. | ||