Rolls-Royce Archives
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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
  
  


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