Davy-loewy Limited

James A Holton

James C Inman

A piston-cylinder assembly for displacing a load through a long stroke consists of a rod, a piston slidable on the rod and by fluid pressure the piston is clamped to the rod, and a cylinder in which the piston is contained. By clamping the piston to the rod and introducing fluid into the cylinder, relative movement is caused between the piston and cylinder and the rod. When one assembly is used, the movement is intermittent but, by mounting two pistons on the rod, each piston being in a separate cylinder, and by controlling the flow of fluid, the movement is continuous.

Piston-cylinder assembly

A cutting or shaping mechanism is described in which the cutting or pressing force is applied to a moving blade or shaping assembly over a limited part of the length of that assembly, including where the assembly is in engagement with the work. The application of the cutting or pressing force is moved progressively along the assembly to cause the assembly to roll on the work and progressively cut or apply pressure to the work. The invention is particularly applicable to a rolling cut shear having a single moving blade assembly or a pair of oppositely curved moving blade assemblies.

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Richmond, United Kingdom

James A Holton