Unloading Scheme For Oil Barrels

A DEVICE shown in patent No. 866.195 is intended to facilitate the unloading of heavy cylindrical objects such as full barrels of oil. (Shell Research, Ltd., St. Helen's Court,......

Self-levelling Suspension

1-1 . A CONSTANT-LEVEL suspension 1-1 . valve is shown in patent No. 865,952. It is said to. have a long life. (Engineering Research and Application, Ltd., London Road,......