THE BENHAM HYDRAULIC MOTOR.
WE illustrate herewith the Benham hydraulic motor, manufactured by the Amherst Hydraulic Motor Company of Holyoke, Mass.
This motor can be operated by the ordinary supply pipes of the water service of cities and towns. It consists of eight cylinders, radiating from a common centre, with pistons and rods as shown in the cut.
By means of a single rotary valve the water is admitted constantly to four of the cylinders. As the valve cuts off the water supply from the last cylinder of the four at work, it 3lso opens the cylinder preceding the four, thus keeping four constantly pushing the crank forward in the line of rotation. The water is admitted to and discharged from all of the cylinders by the same valve. This valve, as well as other parts liable to corrosion from contact with water, are composition.
It is claimed that as a piston motor the Benham is not subject to any of the loss of power attributed to other motors ; that its packings are durable, tight and almost frictionless ; that it can be reversed and runs equally well in either direction, and gives the largest possible percentage of power for the water used. It will start in any position with a full load. With the use of the Benham governor the stroke of the pistons is Shortened, thus maintaining a full water pressure on the pistons while using water only in proportion to the load carried. Provided with a register the Benham motor also becomes a meter.
The fallowing cuts show the motor in use as an elevator.
The worm and gear are connected directly with the shaft of the motor, which has a reversible valve so that it can be run in either direction, doing away with the necessity of using belts and tight and loose pulleys. As the worm and gear, and alt of the working parts of the motor, are constantly running in oil, it is noiseless, easily kept in order and durable.