Patent GB-191406282-A (GB)
Title: Improvements in Fluid Transmission Mechanism.
Inventor: HAYES FRANK ANDERSON
IPC: B60K17/10
Filed: 1914-03-12
Granted: 1915-06-14
Abstract: 6282. Hayes, F. A. March 12. Clutches and speedvarying mechanism.-Relates to transmission gears employing liquids or gases of the kind in which a pump and motor of the piston-andcylinder type are used, and comprises various detail improvements hereinafter described. The revolving cylinder pump 4, 5, 6, 7, Figs. 1 and 2, is driven by the engine 1, the connecting- rods 9 being mounted on the crank-pin 10, which is carried by the driven shaft 11. The crank-pin may have a fixed or variable eccentricity. The cylinders are connected in opposed pairs by passages 12, 13, 15, 16 to a ring 14, which is loosely mounted on a drum 18 secured to the driven shaft 11. The interior of the drum communicates with the regulating-valve 23, by the pipes 21, 22 and is divided by a rib 30, separating the suction and discharge conduits. The motor 88, 89 is similar to the pump, but with fixed cylinders, and is connected to the ring 60 by pipes 74, 75. Means for by-passing two of the motor cylinders are provided, consisting of a sleeve 76, feathered to the ring 60, slidable on the drum 49, and provided with perforations 78 for one pair of cylinders and slots 80 for the other pair. A peripheral channel 82 is also provided in the sleeve. When this sleeve is moved axially, the perforations 78 are placed out of register with the slot 58, and the two horizontal cylinders of the motor by-passed. This decreases the capacity of the motor and thus increases the speed. The eccentricity of the motor crank-pin is varied by means shown in Figs. 1 and 6. The crank-pin 92 is slidably mounted on guides 93, 94, and a sleeve 95 with arm 100 and pin 101 is provided with a spiral groove, in which engages a pin 98 on the sleeve 97. A longitudinal movement of this sleeve causes a rotation of sleeve 95, and thus a variation in the throw of the crankpin 92. The capacity of the motor thus depends upon the stroke of the pistons and the speed of the driven shaft 11, while the capacity of the pump depends upon the difference between the speeds of the revolving cylinders and the revolving crank. The controlling-valve 23 permits of shortcircuiting the pump when the shaft 11 is stationary. It. also permits of the supply from the pump to the motor being throttled while starting up. It also permits of the communication between the suction and delivery of the pump being shut off, thus giving a solid drive to the shaft 11 ; in these circumstances, the throw of the motor crank is raduced to zero to prevent useless movement of the pistons. It also permits of the reversal of the shaft 11 by reversing the connexions of the suction and delivery conduits of the motor. Fig. 5 shows auxiliary apparatus by which the pump may act as a self-starter for the engine 1. Valves 102, 103, 113, 114 are provided by which, when the engine is running free, fluid may be stored under pressure in the tank 105, this fluid being afterwards used as a pressure supply to operate the pump as a motor and so start the engine. The pressure of fluid in both suction and delivery pipes may be greater than atmospheric pressure.