System Demonstrated
21st January 1955, Page 59
21st January 1955
Page 59
Page 59, 21st January 1955
— System Demonstrated
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The Gregoire system is used in the new Dennis ambulance with Perkins P4 oil engine.Semi-elliptic springs with only a small number of leaves are attached to the frame in the normal manner, but are controlled by short coil springs in tension. These springs have little effect on the suspension in the normal loading position, but progressively increase the spring rates under bump and rebound conditions, thus enabling soft main springs to be used without causing abnormal bouncing over rough surfaces an important point in passenger vehicles.