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).
Retail price list and promotional leaflet for WedgeRite Piston Rings, including a diagram of its function.
| Identifier | ExFiles\Box 16\1\ Scan136 | |
| Date | 2nd August 1921 guessed | |
| Left Panel: WedgeRite PISTON RINGS Expand in Width and Diameter RETAIL PRICE LIST DIAM. | 5/32 in. width | 3/16 in. width | 1/4 in. width | 5/16 in. width and over 2 5/8 | $1.75 | $1.75 2 3/4 | 1.75 | 1.75 2 7/8 | 1.75 | 1.75 2 15/16| 1.75 | 1.75 3 | 1.75 | 1.75 | $1.75 3 1/8 | 1.75 | 1.75 | 1.75 3 1/4 | 1.75 | 1.75 | 1.75 3 3/8 | 1.75 | 1.75 | 1.75 | $1.75 3 1/2 | 1.75 | 1.75 | 1.75 | 1.75 3 5/8 | 1.75 | 1.75 | 1.75 | 1.75 3 3/4 | 1.75 | 1.75 | 1.75 | 1.75 4 | 2.00 | 2.00 | 2.00 | 2.00 | $2.00 4 1/8 | 2.00 | 2.00 | 2.00 | 2.00 | 2.00 4 1/4 | 2.00 | 2.00 | 2.00 | 2.00 | 2.00 4 3/8 | 2.00 | 2.00 | 2.00 | 2.00 | 2.00 4 1/2 | 2.00 | 2.00 | 2.00 | 2.00 | 2.00 4 3/4 | 2.00 | 2.00 | 2.00 | 2.00 | 2.00 5 | 2.00 | 2.00 | 2.00 | 2.00 | 2.00 All rings above 5 in. in diameter, 50c. per diameter inch. All prices are f.{Mr Friese} o.{Mr Oldham} b. shipping point. When ordering WEDGERITE Piston Rings always give the exact diameter of cylinder and width of piston ring grooves in piston. NEW PRICES All rings listed above at 1.75 are now 1.50 with exception of 3 1/8 x 5/32 which are 1.25. Rings listed at 2.00 are now 1.75. Middle Panel: CYLINDER WALL RING EXPLOSION CHAMBER PISTON HEAD WEDGERITES EXPAND IN WIDTH AND DIAMETER RESULTING IN PERMANENT EFFICIENCY RING CYLINDER WALL Right Panel: WedgeRite PISTON RINGS Expand in Width and Diameter ELIMINATING OIL PUMPING AND COMPRESSION LEAKS | ||