Patent GB-191115578-A (GB)
Title: Improvements in the Liquid Transmission of Power.
Inventor: BARBEY CAMILLE
IPC: F16H39/18
Filed: 1911-07-04
Granted: 1912-02-22
Abstract: 15,578. Barbey, C. May 19, [Convention date]. Speed-varying mechanism.-Apparatus for the hydraulic transmission of power, in which an engine having regulating-pistons of the kind described in Specification 14,512/11 is employed, comprises a radial-cylinder pump in which the pistons act through rollers on a guide-ring, and one or more engines. The pump and engines communicated through valve faces at rightangles to the axis of rotation and valves having co-axial passages provided with two co-axial and adjacent chambers in such a manner that the valve is always properly centred and resting against the valve face of the cylinder body. The valves may be fixed against rotation and only have an axial displacement, the cylinder body and pistons then rotating, or the cylinder body and pistons may be fixed and the valves with the guide-rings may be secured fast to the rotating shafts. A second and inner guide-ring co-axial with the first is provided to prevent the pistons from moving unexpectedly into their cylinders. Fig. 1 is a longitudinal section through the axis of the pump, and shows the pump cylinders 1<a> and engine cylinders 1<b> connected to the cylindrical body 2, which rotates within the guide-ring 3. Passages 4 lead from the cylinders to a valve face arranged at rightangles to the axis of rotation. The pump pistons 6<a> and engine pistons 6<b> are each provided with an axle 7 on which are mounted rollers 8. These are held in place by guard-plates 9. The guide-ring 3, the eccentricity of which may be varied, is formed of a main ring 12 and an inner or safety ring 13. The rectilinear displacement of the centre of the guide-ring takes place between troughs formed by an inner boss 16 and a rib 17 on the cover of the apparatus. This movement is caused by the pressure of liquid in the control apparatus acting between the piston 19 and cylinder 18 in a somewhat similar manner to that described in Specification 14,513/11. The liquid passes through the central passage 20, shown in Fig. 3. The distribution valve of the system consists of a co-axial plate 5. The inlet passage leads to the chamber 23, and the outlet passage 22 leads to the parallel chamber 24 in such a way as to hold the valve against the cylindrical body 2. The valve is enclosed in a guide 25, 26, within which is placed the spring 27. The axial movement of the valve is regulated by keys 28. A hand control for the ring comprises a screwed spindle secured to the latter and provided with a pointer to indicate the position of the ring. An oilreservoir 35 surrounds the valve box. Fig. 5 shows the roller 36 arranged between two cheeks 37, 37<1> and bearing on the outer ring 12. A smaller roller 39 bears in emergencies on the inner ring 13. Fig. 7 shows a modified form of a co-axial valve. In order to permit the valve to resist the pressure of the incoming liquid and to remain against the face of the body 2, there is arranged beside the chamber 24 a semicircular chamber 40 into which leads the port 5<a> of the passage 22.