This machine is a large hydraulic press, with an adjustable head, and a
weighing system for recording the loading developed by a triple-plunger
pump. It has a maximum clearance of 65 ft. between heads; the clearance
in the machine is a trifle more than 6 ft. between screws, and the heads
are 6 ft. square.

The machine consists of a base containing the main cylinder, with a
sectional area of 2,000 sq. in., upon which rests the lower platform or
head, which is provided with a ball-and-socket bearing. The upper head
is adjustable over four vertical screws, 13½ in. in diameter and 72 ft.
2 in. long, by a system of gearing operating four nuts with
ball-bearings upon which the head rests. The shafting operating this
mechanism is connected with a variable-speed motor which actuates
the triple-plunger pump supplying the pressure to the main cylinder
(Fig. 4).

The weighing device consists of a set of standard Olsen levers for
weighing one-eightieth of the total load on the main cylinder. This
reduction is effected through the medium of a piston and a diaphragm.
The main cylinder has a diameter of 50 in., and the smaller one, a
diameter of 5-9/16 in. The weighing beam is balanced by an
automatically-operated poise weight, and is provided with a device for
applying successive counterweights of 1,000,000 lb. each. Each division
on the dial is equivalent to a 100-lb. load, and smaller subdivisions
are made possible by an additional needle-beam.

The power is applied by a 15-h.p., 220-volt, variable-speed motor
operating a triple-plunger pump, the gearing operating the upper head
being driven by the same motor. The extreme length of the main screws
necessitates splicing, which is accomplished as follows: