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).
Advertising brochure for Air-Maze air filters, detailing the Oil Bath and Unimaze types.
| Identifier | ExFiles\Box 135\4\ scan0132 | |
| Date | 7th December 1938 guessed | |
| AIR-MAZE ASSURES CLEAN AIR 90 to 98 per cent. of the fuel consumed by an engine is air. You are very particular about the secondary fuel and would never think of throwing a handful of grit in your petrol or oil. ARE YOU AS CAREFUL WITH AIR (your primary fuel)? AIR-MAZE filters will eliminate all the grime and grit from this most important element. OIL BATH TYPE Recognized by leading equipment manufacturers and engineers as the most scientifically constructed air cleaner available to-day, the AIR-MAZE Oil Bath type unit is ideal for all fields of air filter application. As illustrated, the famous AIR-MAZE Screen element, embodying precisely built-in progressions of density, is arranged in such a manner that the air and element are constantly washed with oil. Only inexpensive oils are necessary. In the event of careless attention the filter is not ruined by clogging, as, owing to the large element area, the air velocity through the AIR-MAZE is so low that the dust continues to impinge on the element. Thus there is temporary protection, even without oil in the bowl. [Image Callouts for Oil Bath Type Filter] Dis-assembled by Removing One Wing Nut Bright Aluminium Metal-escent Finish All types of Mounting Necks Air Entrance All Around Filter Element has a Built-in Exact Density Oil and Dust Sump Advantages of this Filter - Very high air cleaning efficiency, 99·83% of dust and grit is removed from air by the filter. - Less than 1·5 in. Water Gauge restriction. - Perfect oil washing action assures long service before cleaning is required, no clogging. - Filter is easily assembled : cleaning is a task of but a few minutes. Merely empty bowl of collected dirt and refill with clean oil. Compact and attractive of appearance, this filter is important protective equipment for every engine and air compressor. - Enables your equipment to retain original operating efficiency and power. UNIMAZE TYPE The Unimaze is the original, patented AIR-MAZE unit developed over a period of sixteen years. Due to circumferential and vertical design, the vibration-proof element provides three to five times more surface area than may be found in other conventional types of filters. This feature, along with the exact and progressive density, combines to create an air cleaner having many noteworthy advantages. As a low priced yet highly efficient and adaptable form of protection against dust and grit, Unimaze air filters are unsurpassed. The dust is impinged on a multitude of exactly spaced baffles which are wetted with oil when the filter is placed in service. [Image Callouts for Unimaze Type Filter] Disassembled by removing one knob or nut No weak or over-dense areas in element All types of mounting necks Filter elements not affected by vibrations Oil wetted when placed in service Advantages of this Filter - Efficiently 'traps' more than 99% of dust and grit. - Low restriction—less than 1/4-in. H2O. - Unusual dust holding capacity assures long service between cleaning periods. - To clean, it is necessary to disassemble and swish element in oil. - Appearance is attractive, compact and simple, adaptable for various types of mountings. - Approved as efficient flame arresters; ideal for marine and aviation applications. GREAT DUST-HOLDING CAPACITY The dust capacity of the element is increased by the circular form of the filter, which provides an extraordinarily large filter area and by the exact progressive density of the layers themselves. NON-CLOGGING FILTER ELEMENT The exact density with separating layers prevents clogging and enables the AIR-MAZE filter to operate with an air restriction of less than 1/4-inch water gauge. AIR-MAZE (GREAT BRITAIN) LTD., BUSH HOUSE, LONDON, W.C.2 | ||