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 document describing the Schrader Rotating Pressure Joint, its mechanism, and various applications in vehicles.
| Identifier | ExFiles\Box 158\1\ scan0164 | |
| Date | 6th December 1937 guessed | |
| Schrader REG. U.S. PAT. OFF. PAT. PENDING A—The outer stationary section B—The inner rotating section 1—Connection to gauges, compressed air tank, etc. 2—Connection to tire valve on rotating wheel NO. 7650 THE Schrader Rotating Pressure Joint is a practical device that makes possible the transmission of air or other gases (and many liquids), from a stationary, or fixed object, to a revolving part. The Unit consists of two principal sections, one capable of rotating within the other, meanwhile permitting a continual flow of air under pressure between the two. The Rotating Passage comprises, briefly, an impervious flexible diaphragm of self-lubricating material held tightly against a tubular lapped steel insert seat. The movable yet airtight union thus formed is further maintained by the air pressure from within. The device is exceedingly simple and withstands severe service for long periods. APPLICATIONS A survey of the possible uses for the Schrader Rotating Pressure Joint has not yet been completed. However, it is apparent from the nature of the device that uses will be many and varied. The adaptability of the Joint may be determined from the following actual service installations: ROTATING JOINT USED ON FACTORY TIRE TESTING MACHINE As part of a factory tire testing machine, to transmit air from a compressor to a revolving tire, the Joint has proved its dependable practicability over a period of two years. A similar installation on an automobile forms the heart of a system developed by Schrader engineers that allows control of all tire pressures from the operator’s seat while the vehicle is in motion. This system has tremendous possibilities, particularly with the operation of commercial vehicles, trailers and rail cars. Above right: A Schrader Rotating Pressure Joint mounted on the rear wheel of a passenger car. Above: The Control Panel on the Instrument Board Gauges indicate the pressure in each tire and individual valve outlets permit control of pressures from the driver's seat. Printed in U. S. A.{Mr Adams} | ||