Improvements in Pumps.
Year: 1892

page_text: Date of Application, 9th Aug., 1892-Accepted, 10th Sept., 1892
Improvements in Pumps.
I HEINRICH MAASS of Altona in the Empire of Germany do hereby declare the
nature of this invention and in what manner the same is to be performed to be
particularly described and ascertained in and by the following statement :-
This invention consists in the production of a double acting suction and pressure
pump in which a piston is not used, and in which consequently the preparation of
the inner surface of the pump cylinder is not necessary.
By these means the cost of production and also of preparation are greatly reduced,
any failure being rendered practically impossible, and the wear of the principal
portion of the pump-the elastic partition-is easily and cheaply repaired or
renewed.
On the annexed sheet of drawings,
Fig. 1 represents in side view one of these pumps arranged for hand or steam
driving.
Fig. 2 shows a plan and Fig. 3 the front elevation of the same.
Fig. 4 shows a side elevation of a pump for hand power only.
In Fig. 1 the pump chamber is represented partially open showing the arrange-
ment of the elastic partition and of the valves.
A double chamber G of cylindrical section is provided with flanges and stuffing
boxes, the top and bottom chambers g g for the suction and delivery valves being
attached thereto and to the suction and delivery pipes & and d.
The valves have their seats in the ends of the said chambers.
0
The chamber G
is divided into a right and left chamber by means of a circular plate or diaphragm
of leather, india rubber or steel clamped between the flanges of the cylinder, and
secured to the piston rod in a suitable manner. If the plate is made of leather,
india rubber, or a similar material it has a slightly convex section. If it is of
steel it is made with a circular wave or roll (see Fig. 4) and covered with a protector
against rust. The edges of the flanges of the cylinder and of the fastening-discs s'
and on the piston rods are well rounded in order not to cut the material forming
the plate. The lift of the upper valve is limited by the wall of the chamber, that
of the lower valve by a small shoulder u on the valve tail. The working of the
pump by hand power is effected by means of the lever h which is connected by a
link to the piston rod, whilst power driving is effected from the opposite end by
means of an eccentric e fixed to the shaft w and driving a crosshead o.
The stroke
of the piston rod can limited by steel collars or shoulders fixed thereto.
The action of the pump is as follows:
By the backward and forward movement of the lever about its turning point,
the piston rod receives the equivalent direct movement and the plate connected
thereto by the flat central portion is forced to the right or left.. The difference of
volume thereby produced in the chambers causes the action of the valves in the
manner usual with double acting pumps. By the addition of an air chamber a
regular flow of water can be obtained.
Having now particularly described and ascertained the nature of my said inven-
tion and in. what manner the same is to be performed, I declare that what I
claim is :-
1. In a suction and delivery pump, the employment of a plate p of elastic
material, or of a metal plate with circular rolls or waves secured to the piston rod
and the chamber and dividing the latter into two chambers substantially as described
and for the purpose specified.

page_text: 2. The arrangement and construction of a double acting pump substantially as
described with reference to Figures 1, 2, and 3, and to Figure 4 of the drawings.
Dated this 9th day of August 1892.
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.