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).
Technical leaflet for the 'Winterfront' automatic radiator shutter system.
| Identifier | ExFiles\Box 39\4\ Scan059 | |
| Date | 19th January 1923 guessed | |
| Equip your Radiator with a WINTERFRONT TRADE MARK Aluminum Heat Conducting Flange A Thermo-Wafer Cells B Cell Spacer C Double Bell Crank D Thermostat Insulator E Frame Insulator F Brass Trunions G Special Composition Bearings H Braided Cushion Cord I J Shell K Safety Springs L Automatic Release M Shutter Lever N Closing Button O Shutter Rod P Shutter Operating Bar Q Closing Spring R Shutters THE “WINTERFRONT” has a drawn steel shell (J) which is made to exactly fit over the core of the radiator, and is attached by four slender bolts which pass thru it. A braided cord edging (I) forms a protecting cushion between the shell of the “WINTERFRONT” and the core of the radiator. The shutters (R) are made of extra smooth steel and are ribbed which makes them very rigid. The shutter axles or trunions (H) are turned brass and work in a special composition (G) which insures noiseless and durable bearings. The shutters are arranged to operate in unison (Q) and are connected with the thermostat. The thermostat consists of a pair of Thermo-wafer cells (B) with a spacer (C) and an aluminum heat conducting flange or plate (A). The Thermo-wafer cells are filled with a mixture of liquid gases proportioned to make the cells expand or contract at desired temperatures. For ordinary requirements these are filled to begin expansion at 130º Fahrenheit and to be fully expanded at 175º to 180º F.{Mr Friese} In service attached to an automobile radiator, the aluminum heat conducting flange (A) rests flat against the core of the radiator and as it warms up carries the heat to the Thermo-wafer cells causing them to expand. As the cells expand they turn a double bell crank (D) which is connected with the shutters opening them gradually to correspond with the requirement of the motor as shown by the heat of the radiator. The operation is entirely automatic, the shutters opening as the heat of the radiator rises above 130º F.{Mr Friese} and closing again as it falls below that temperature. The entire thermostat is protected from the cold by two metal housings and a special insulating filler. In the automatic operation of the “WINTERFRONT” the shutters do not close until the radiator temperature has fallen below 130º F.{Mr Friese}, but should you desire to close them immediately on stopping your car you simply press the closing button (N) which instantly locks them shut. However, even in the case of this one manual operation you are relieved from all care or responsibility as the automatic release (L) restores the shutters to operating position as the motor is started. The “Winterfront” is in every way an automatic regulator of engine temperature thru controlling the flow of air thru the radiator. | ||