The hopper-shaped reservoir is supported by two pivots, and has a slight rocking or vibrating motion imparted to it by each lifting of the lever. This prevents the earth from becoming clogged, and insures its regular delivery.
[Illustration: Fig. 68 THE "PULL-UP" APPARATUS.]
The construction is more clearly shown in Fig. 68.
In this figure, A is the vibrating hopper for holding the earth. Its capacity may be increased to any desired extent by building above it a straight-sized box of any height. It is not unusual, in fixed privies, to make this reservoir large enough to hold a supply for several months. As the earth is dry, there is no occasion for the use of any thing better than common pine boards in making this addition to the reservoir.
B is one side of the wooden, frame by which the hopper is supported and it may be made of one inch pine or spruce.
C is a box of lacquered or galvanized iron, without either top or bottom. It moves on two pivots, one of winch is shown on its exposed side. In its present position, its upper end opens into the hopper, and its lower end is dosed by the stationary board over which it stands. When the handle is pulled up, the lever, which is connected with the box, jerks it rapidly up, so that its back side closes the opening of the reservoir, and its bottom opens to the front. In its movement it discharges its contents of earth forward under the seat. When the handle is dropped, the box returns to its natural position, and is charged again.
D is one of the pivots—a corresponding one being on the other side—by which the hopper is supported, and on which it vibrates.
a, a, a, a, a, a, are the parts of the framework, the dimensions of which in feet and inches are given.
The only essential part not shown is an earthen-ware pan without a bottom, similar to the pan of a water-closet, only not so deep and with a larger opening, which is attached to the under side of the seat, and which in a measure prevents the rising of dust, and conducts the urine to the point at which the most earth falls. This is the least important part of the invention, but it has a certain advantage.
The self-acting apparatus is more complicated, and persons wishing it would do best to apply directly to the Company.