US246089A - Hydraulic air-pump - Google Patents

Description

" 2 Sheets-Sheet 1.

N. GURTN. HYDEAULIG AIR PUMP.

(No Model.)

Patented Aug. 23

( 0 Model.)

. 2 Sheets-Sheet 2. N. CURTIS,

HYDRAULIC AIR PUMP.

m U m v,. 3': a 2 mo u I v A t. {I n, n U 1 e Y M fin 0 8 0 6 4 2 0 N W m m 1 Nurse STATES ATENT OFFICE.

NELSON CURTIS, OF NEWTON, MASSACHUSETTS.

HYDRAULIC AIR-PUMP.

SPECIFICATION forming part of Letters Patent No. 246,089, dated August 23, 1881. Application filed Marches, 1881. (No model.)

To all whom "it may concern Be it known that I, NELsoN OUR'rIs, ofthe city of Newton, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Hydraulic Air-Pumps; and I do hereby declare that the following is a full and exact description thereof, reference being bad to the accompanying drawings, and to theletters of reference marked thereon, the same forming part of this specification.

The nature of my invention relates to the construction, arrangement of parts, and their combination, in the manner substantially as hereinafter more fully described, to produce a compact and automatic machine, which, by means of the flow of water under pressure in a connected pipe, will be available for forcing air or other fluid into a reservoir, and for maintaining a given pressure therein.

With reference to the drawings, like letters refer to the same or corresponding parts in all the figures.

Figure 1 is a sectional elevation of the machine. Fig. 2 is an elevation of one half, the other half being symmetrical, of the machine viewed at right angles with the view of Fig. 1.

Fig. 3 is a plan, a part being broken out to' show parts below. Fig. 4 is an enlarged sectional elevation of the upper part of the machine corresponding to Fig. 1. Fig. 5 is a view of the air-valve and case a I). Fig. 6 is a plan of the check-valve seat and guide 0. Fig. 7 is avertical sectional View of same. Fig. Sis an under "iew of check-valve d.

c is an inlet-orifice for the supply-pipe, where the water enters under pressure into the float and forcing-cylinderf g, and h is an outletpassage. The float and pressure or-forcing chamberfg is made in theillustration here of a metal base, f, a glass cylinder, 9, and a metal dome or top, i. These are secured together by suitable connections or screw-rods, j, the joints being suitably packed, as at 7r.

A piston, l, with valve m attached, is arranged to operate in a cylinder or chamber, a, and communication by a small orifice is kept up between chamber a and the supply-pipe, which enters at 0. Chamber at has an outlet closed by a valve, 0, delivering into chamber fg. The valve 0 is opened and closed by the attached lever 19, which receives its movements from sleeve q. Sleeve q is guided by rod 4",

upon which it is freely fitted, with a slight frictional contact sufficient (or thereabout) to sustain its weight at any point to which it may be moved. The frictionv may be obtained by slightly bending the sleeve or rod, or otherwise. The float s is fitted freely about the sleeve, and is free to travel up and down upon it between the limits fixed by flanges t u.

The sleeve q embraces the end of lever between two flanges, t v, or their equivalents.

A pivoted lever, w, is actuatedby the valve on or piston l, and communicates to valve a: and a secondary or supplemental valve, 3 their movements, which are simultaneous with, but opposite to, the movements of valve m. The secondary valve y opens first, and being small opens easily, relieving the pressure somewhat on the valve m, so that it may open easily.

Referring to the upper part of the drawings, 2 is a floating valve, which, in case the forcing water or liquid rises so far, will 'be floated up and close the passage A, which is the air-escape or exit-passage from chamberf g.

a is an inletting air-supply valve; and it consists of an annular diaphragm or flap, closing against the blank seat B and opening inward. d is a wing, puppet, or suitable valve, closing the air-exit passage beyond A whenever the pressure in this passage is great enough to press the diaphragm l) upward against the pressure of spring E, thus preventing the foreing of any more air into chamber F and its outlet G. The outlet G is to be connected by pipe to any other pipe, reservoir, or receiver where a given pressure is required to be maintained. The apparatus will also work, irrespective of a given pressure being required, up

to a certain limit of pressure proportionate to l the pressure of the water that a'ctuates the machine.

The valve (1 is provided with wings H for convenience in the construction. The spring E is graduated to any given pressure by means of the adjusting-screw L. The spring E acts on the diaphragm D through the piston M.

N is a check-valve, preventing the air from returning into the chamberfg.

The operation is substantially as follows: The water has nearly escaped through valves a: y. This allows floats to strike flange it, thus movin gthe sleeveqdownward, depressin glever p and opening valve 0, which relieves pressure in chamber a. In consequence the pressure in pipe 0 opens valve m, and at the same instant lever &0 allows valves 00 y to close. The water then rises in the chamberfg, carrying upward the float s 8 until it strikes the flange a. Meanwhile therisin g water forces the air from chamber f 9 through passage A past valve N, through valve (1 out into pipe Gr. Vhen the float strikes flange a it lifts sleeve q, lever 17, and closes valve 0, causing pressure to accumulate in chamber afrom pipe 0. This pressure acts on piston l and closes valve m, causingleverw simultaneously, or nearlyso, to open valves ya", when the water flows out again, as before, from chamber f gthrough valves my, completing the process, which continues to re peat itself until the pressure in chamber under diaphragm D is suflicient to liftsaid diaphragm, and thereby allow valve (1 to close, so limiting the increase of pressure to the degree for which spring E has been adjusted. During the escape of the water from chamber f g through valves ag the air-valve a B admits air to refill the chamberfg.

Instead of the pressure-regulating device 1) E L, &c., a pressure-regulator may be applied to inlet-pipe e, and the ultimate pressure in pipe Gthereby controlled in some cases.

I claim- 1. The combination of the floats and sleeve q and its flanges with the pivoted valve 0, lever 19, and piston l, substantially as and for the purposes set forth.

2. Thelever w, in combination with the piston Z, valve or, and valve m, whereby is secured the simultaneous, or approximately simultaneous, inverse action of the valve .1: and valve m, substantially as described.

3. Thecombination ofthe valve 1 with valve 00, lever 10, and valve m, piston l, and valve 0, substantially as described.

4. The pivoted valve 0 and lever 12, in combination with the sleeve q and float s, substantially as and for the purpose set forth.

5. The chamber F, valve (1, diaphragm D, spring E, and adjusting screwcap L, in combination with the pipes A and G, substantially as described.

(3. The air-pump constructed as described, combining the base], cylinder 9, dome i, inlet e,valve m, piston l, chamber n, communicating with inlet 0, lever w, valve 0, lever 12, valves :v y, float s, sleeve (1, guide 0', flanges a t, and outlet-passage A, check-valve N, and air-valve a, all substantially as described.

7. The lever 20, in combination with thepiston Z, valves 1 .r, and valve m, substantiallyas described.

NELSON O URTIS.

Witnesses D. N. B. COFFIN, ALFRED E. 00X.

Images