US131952A - Improvement in double-acting pumps - Google Patents

Description

UNITEE rfi THOMAs N. HENDERSON, OE JAoksoN, MICHIGAN.

IMPROVEMENT IN DOUBLE-ACTING PUMPS.

Specification forming part of Letters Patent No. 131,952, dated October 8, 1872.

To all whom it 'may concern:

B e it known that I, THoMAs N. HENDER- SON, of Jackson, in the county of Jackson and State of Michigan, have invented a new and useful Improvement in Double-Acting Pumps;

and I do declare that the following is a true and accurate description thereof, reference being had to the accompanying drawing and to the letters of reference marked thereon, and

being a part of this specification, in Which- Figure lisa perspective view of my improved pump; and Fig. 2 is a longitudinal vertical section through the pump-cylinders and base-chambers.

VLike letters refer to like parts in each ligure.

This invention relates to an improvement in the construction of that class of forcepumps inwhich are employed two alternately-acting plungers; and has for its object to ,simplify the construction'and cheapen the cost of such pumps. The invention consists in the peculiar construction of the valve-chambers and passages, and the/arran gement with relation thereto of the valves, as more fully hereinafter set forth.

In the.drawing,Arepresents a chamber cast d with a bottom to it, in which bottom a Waterway, a, is cored in molding it, projecting from the under surface `like a rib, 'and which also serves to strengthen the bed-plate or bottom. This water-way is cast with a branch or T, b, to which the `suction is attached.` It into the chamber at each end, and over each opening is hinged an ordinary clack-valve, B, which forms a foot-Valve for its plunger. Across the chamber is cast a partition or diaphragmh A', near each end, to separate those partswhich contain the foot-valvesfrom the body ofthe chamber. C C are the cylinders, each of which is cast with a flange, C', at the lower end, which is bolted to and forms a covopens l er for the foot-valve chamber. D is au airchamber cast with a flanged bottom, which is bolted to and forms a cover for the central compartment of the chamber A. A yokestandard, E, is bolted to the top of the chamber D, to which standard is pivoted a brake,

F, to which are pivoted the upper ends of the connecting-rods G, whose lower ends are pivoted in the bottoms of the hollow plungers H,

reciprocated in the cylinders (l by the vibrations of the brake. The diaphragms A' are perforated, and over their openings, on the inner sides, are hung the clack-valves B' B', Opening inwardly. I is the discharge-outlet, in one side ofthe central compartment.

It will be seen that by removing -the cylinders the foot-valves will be exposed, and by taking ofi" the air-chamber the delivery-valves are exposed.4 In pumps of large size handhole-plates may be placed in the end and side Walls ofthe chambers for that purpose. N o facing7 ofthe valve-seats or joints is required in this pump, the covers of the chambers being put on over gaskets.

It is evident that the passages are large and free, and the foot and delivery-valves placed soclose together that they will act promptly in opening and closing, while for simplicity and cheapness of construction it is believed to be unequaled. p

What I claimas my invention, and desire to secure by Letters Patent, is

The chamber A, cast with the water-way a proj ectingbelow the bottom to form a strengthenlng-rib, and perforated diaphragms A' A',

and the arrangement with relation thereto of the valves B B B' B', as shown and set forth.

THOMAS N. HENDERSON. Witnesses:

H. F. EBERTs, J. W. BOWLEE.

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